Bump junit from 4.13 to 4.13.1 in /spring-boot/spring-events

Bumps [junit](https://github.com/junit-team/junit4) from 4.13 to 4.13.1.
- [Release notes](https://github.com/junit-team/junit4/releases)
- [Changelog](https://github.com/junit-team/junit4/blob/main/doc/ReleaseNotes4.13.1.md)
- [Commits](https://github.com/junit-team/junit4/compare/r4.13...r4.13.1)

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/ci.yml

@@ -1,6 +1,12 @@
 name: CI
 
-on: [push, pull_request]
+on: 
+  push:
+    paths-ignore:
+      - '**/*.md'
+  pull_request:
+    paths-ignore:
+      - '**/*.md'
 
 jobs:
 

aws/localstack/pom.xml

@@ -65,6 +65,11 @@
 				</exclusion>
 			</exclusions>
 		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
+			<scope>test</scope>
+		</dependency>
 	</dependencies>
 
 	<build>

aws/localstack/src/test/java/io/reflectoring/customerregistration/CustomerImageStoreTest.java

@@ -12,6 +12,7 @@ import io.reflectoring.customerregistration.dtos.CustomerCreateRequest;
 import io.reflectoring.customerregistration.repositories.CustomerImageStore;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 
@@ -34,6 +35,7 @@ import software.amazon.awssdk.services.s3.model.NoSuchKeyException;
 @ExtendWith(LocalstackDockerExtension.class)
 @ActiveProfiles("local")
 @LocalstackDockerProperties(services = { "s3" })
+@Disabled(value = "Disabled because starting Docker containers like this does not run on GitHub Actions.")
 class CustomerImageStoreTest {
 	
 	private static final Region region = Region.US_EAST_1;

aws/localstack/src/test/java/io/reflectoring/customerregistration/CustomerProfileStoreTest.java

@@ -10,6 +10,7 @@ import io.reflectoring.customerregistration.dtos.CustomerDto;
 import io.reflectoring.customerregistration.repositories.CustomerProfileStore;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.extension.ExtendWith;
 
@@ -37,6 +38,7 @@ import software.amazon.awssdk.services.dynamodb.model.ScalarAttributeType;
 @ExtendWith(LocalstackDockerExtension.class)
 @ActiveProfiles("local")
 @LocalstackDockerProperties(services = { "dynamodb"})
+@Disabled(value = "Disabled because starting Docker containers like this does not run on GitHub Actions.")
 class CustomerProfileStoreTest {
 	
 	private static final Region region = Region.US_EAST_1;

build-all.sh

@@ -86,7 +86,12 @@ if [[ "$MODULE" == "module5" ]]
 then
   # ADD NEW MODULES HERE
   # (add new modules above the rest so you get quicker feedback if it fails)
-
+  build_gradle_module "spring-boot/hibernate-search"
+  build_maven_module "core-java/streams/fileswithstreams"
+  build_maven_module "spring-boot/spring-boot-health-check"
+  build_maven_module "spring-boot/spring-boot-logging-2"
+  build_maven_module "spring-boot/spring-boot-docker"
+  build_maven_module "spring-boot/spring-component-scanning"
   build_gradle_module "spring-boot/devtools-demo"
   build_gradle_module "spring-boot/cache"
   build_gradle_module "spring-boot/bean-lifecycle"
@@ -128,6 +133,8 @@ then
   build_maven_module "solid/lsp"
   build_maven_module "resilience4j/retry"
   build_maven_module "resilience4j/ratelimiter"
+  build_maven_module "resilience4j/timelimiter"
+  build_maven_module "resilience4j/bulkhead"
   build_gradle_module "spring-data/spring-data-jdbc-converter"
   build_gradle_module "reactive"
   build_gradle_module "junit/assumptions"

core-java/streams/fileswithstreams/.gitignore

@@ -0,0 +1 @@
+/target/

core-java/streams/fileswithstreams/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

core-java/streams/fileswithstreams/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

core-java/streams/fileswithstreams/.settings/org.eclipse.jdt.core.prefs

@@ -0,0 +1,16 @@
+eclipse.preferences.version=1
+org.eclipse.jdt.core.compiler.codegen.inlineJsrBytecode=enabled
+org.eclipse.jdt.core.compiler.codegen.methodParameters=do not generate
+org.eclipse.jdt.core.compiler.codegen.targetPlatform=11
+org.eclipse.jdt.core.compiler.codegen.unusedLocal=preserve
+org.eclipse.jdt.core.compiler.compliance=11
+org.eclipse.jdt.core.compiler.debug.lineNumber=generate
+org.eclipse.jdt.core.compiler.debug.localVariable=generate
+org.eclipse.jdt.core.compiler.debug.sourceFile=generate
+org.eclipse.jdt.core.compiler.problem.assertIdentifier=error
+org.eclipse.jdt.core.compiler.problem.enablePreviewFeatures=disabled
+org.eclipse.jdt.core.compiler.problem.enumIdentifier=error
+org.eclipse.jdt.core.compiler.problem.forbiddenReference=warning
+org.eclipse.jdt.core.compiler.problem.reportPreviewFeatures=warning
+org.eclipse.jdt.core.compiler.release=disabled
+org.eclipse.jdt.core.compiler.source=11

core-java/streams/fileswithstreams/.settings/org.eclipse.m2e.core.prefs

@@ -0,0 +1,4 @@
+activeProfiles=
+eclipse.preferences.version=1
+resolveWorkspaceProjects=true
+version=1

core-java/streams/fileswithstreams/README.md

@@ -0,0 +1,5 @@
+# Files with streams Code Examples
+ 
+## Related Blog Articles
+
+* [Processing Files using Java 8 Streams](https://reflectoring.io/processing-files-using-java-8-streams/)

core-java/streams/fileswithstreams/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

core-java/streams/fileswithstreams/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

core-java/streams/fileswithstreams/pom.xml

@@ -0,0 +1,34 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>fileswithstreams</groupId>
+    <artifactId>fileswithstreams</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>fileswithstreams</name>
+    <description>File management with streams</description>
+
+    <dependencies>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>11</source>
+                    <target>11</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>

core-java/streams/fileswithstreams/src/main/java/io/reflectoring/fileswithstreams/Cake.java

@@ -0,0 +1,18 @@
+package io.reflectoring.fileswithstreams;
+
+public class Cake {
+    private int id;
+    private String name;
+    private int price;
+    
+    public Cake(int id, String name, int price) {
+    	this.id = id;
+    	this.name = name;
+    	this.price = price;
+    }
+
+	@Override
+	public String toString() {
+		return "Cake [id=" + id + ", name=" + name + ", price=" + price + "]";
+	}
+}

core-java/streams/fileswithstreams/src/main/java/io/reflectoring/fileswithstreams/FilesWithStreams.java

@@ -0,0 +1,209 @@
+package io.reflectoring.fileswithstreams;
+
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import java.util.Set;
+import java.util.jar.JarEntry;
+import java.util.jar.JarFile;
+import java.util.regex.Pattern;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public class FilesWithStreams {
+	
+	static String folderPath = "src/main/resources/books";
+	static String filePath = "src/main/resources/books/bookIndex.txt";
+	static String csvPath = "src/main/resources/cakes.csv";
+	static String utfFilePath = "src/main/resources/input.txt";
+	static String jarFile = "src/main/resources/books.zip";
+
+	public static void main(String[] args) throws IOException {
+		System.out.println("-------------------Files with Streams------------------ ");
+		
+		System.out.println("-------------------Introductory Example------------------ ");
+
+		processWithStream();
+
+		System.out.println(
+				"\r\n" + "-------------------Example 1 - Reading line by line from a file------------------ " + "\r\n");
+
+		readLineByLineUsingFiles();
+
+		System.out.println(
+				"\r\n" + "-------------------Example 2 - Reading with Buffered Reader------------------" + "\r\n");
+
+		readLineByLineUsingBufferedReader();
+
+		System.out.println(
+				"\r\n" + "-------------------Example 3 - Reading all lines from a file------------------ " + "\r\n");
+
+		readAllLinesUsingFiles();
+
+		System.out.println(
+				"\r\n" + "...................Example 4 - Reading with parallel streams------------------ " + "\r\n");
+
+		readWithParallelStreamAndPrint();
+
+		System.out.println(
+				"\r\n" + "-------------------Example 5 - Reading UTF-encoded file------------------ " + "\r\n");
+
+		readUtfEncodedFile();
+
+		System.out.println(
+				"\r\n" + "-------------------Example 6 - Reading, Filtering and Counting------------------ " + "\r\n");
+
+		readFilterCountFromFile();
+
+		System.out.println("\r\n" + "-------------------Example 7 - Splitting Words------------------ " + "\r\n");
+
+		splitWordsFromFile();
+
+		System.out.println("\r\n" + "-------------------Example 8 - Loading from CSV - ------------------ " + "\r\n");
+
+		loadItemsFromCsvFile();
+
+		System.out.println("\r\n" + "...................Example 9 - Listing Directories------------------ " + "\r\n");
+
+		listDirectories();
+
+		System.out
+				.println("\r\n" + "...................Example 10 - Listing Regular Files------------------ " + "\r\n");
+
+		listRegularFiles();
+
+		System.out.println(
+				"\r\n" + "...................Example 11 - Walking Files Recursively------------------ " + "\r\n");
+
+		walkFilesRecursively();
+
+		System.out.println("\r\n" + "...................Example 12 - Finding Files------------------ " + "\r\n");
+
+		findFiles();
+
+		System.out.println(
+				"\r\n" + "...................Example 13 - Printing JAR fie contents------------------ " + "\r\n");
+
+		printJarFileContents();
+
+		System.out.println("...................Example 14 - Printing Matching JAR entries------------------ " + "\r\n");
+
+		printMatchingJarEntries();
+
+	}
+
+	static void processWithStream() {
+		List<String> cities = Arrays.asList("London", "Sydney", "Colombo", "Cairo", "Beijing");
+		cities.stream().filter(a -> a.startsWith("C")).map(String::toUpperCase).sorted().forEach(System.out::println);
+
+	}
+
+	static void readLineByLineUsingFiles() throws IOException {
+		try (Stream<String> lines = Files.lines(Path.of(filePath))) {
+			lines.forEach(System.out::println);
+		}
+	}
+
+	static void readLineByLineUsingBufferedReader() throws IOException {
+		try (Stream<String> lines = (Files.newBufferedReader(Paths.get(filePath)).lines())) {
+			lines.forEach(System.out::println);
+		}
+	}
+
+	static void readAllLinesUsingFiles() throws IOException {
+		List<String> strList = Files.readAllLines(Path.of(filePath));
+		Stream<String> lines = strList.stream();
+		lines.forEach(System.out::println);
+	}
+
+	static void readUtfEncodedFile() throws IOException {
+		try (Stream<String> lines = Files.lines(Path.of(utfFilePath), StandardCharsets.UTF_8)) {
+			lines.forEach(System.out::println);
+		}
+	}
+
+	static void loadItemsFromCsvFile() throws IOException {
+		Pattern pattern = Pattern.compile(",");
+		try (Stream<String> lines = Files.lines(Path.of(csvPath))) {
+			List<Cake> cakes = lines.skip(1).map(line -> {
+				String[] arr = pattern.split(line);
+				return new Cake(Integer.parseInt(arr[0]), arr[1], Integer.parseInt(arr[2]));
+			}).collect(Collectors.toList());
+			cakes.forEach(System.out::println);
+		}
+	}
+
+	static void readFilterCountFromFile() throws IOException {
+		try (Stream<String> lines = Files.lines(Path.of(filePath))) {
+			long i = lines.filter(line -> line.startsWith("A")).count();
+			System.out.println("The count of lines starting with 'A' is " + i);
+
+		}
+	}
+
+	static void splitWordsFromFile() throws IOException {
+		try (Stream<String> lines = Files.lines(Path.of(filePath))) {
+			Stream<String> words = lines.flatMap(line -> Stream.of(line.split("\\W+")));
+			Set<String> wordSet = words.collect(Collectors.toSet());
+			System.out.println(wordSet);
+		}
+	}
+
+	static void listDirectories() throws IOException {
+		try (Stream<Path> paths = Files.list(Path.of(folderPath))) {
+			paths.filter(Files::isDirectory).forEach(System.out::println);
+		}
+	}
+
+	static void listRegularFiles() throws IOException {
+		try (Stream<Path> paths = Files.list(Path.of(folderPath))) {
+			paths.filter(Files::isRegularFile).forEach(System.out::println);
+		}
+	}
+
+	static void walkFilesRecursively() throws IOException {
+		try (Stream<Path> stream = Files.walk(Path.of(folderPath))) {
+			stream.filter(Files::isRegularFile).forEach(System.out::println);
+		}
+	}
+
+	static void findFiles() throws IOException {
+		int depth = Integer.MAX_VALUE;
+		try (Stream<Path> paths = Files.find(Path.of(folderPath), depth, (path, attr) -> {
+			return attr.isRegularFile() && path.toString().endsWith(".pdf");
+		})) {
+
+			paths.forEach(System.out::println);
+
+		}
+
+	}
+
+	static void printJarFileContents() throws IOException {
+		try (JarFile jFile = new JarFile(jarFile)) {
+			jFile.stream().forEach(file -> System.out.println(file));
+
+		}
+	}
+
+	static void printMatchingJarEntries() throws IOException {
+		try (JarFile jFile = new JarFile(jarFile)) {
+			Optional<JarEntry> searchResult = jFile.stream().filter(file -> file.getName().contains("Matilda"))
+					.findAny();
+			System.out.println(searchResult.get());
+
+		}
+	}
+
+	static void readWithParallelStreamAndPrint() throws IOException {
+		try (Stream<String> lines = (Files.lines(Path.of(filePath)).parallel())) {
+			lines.forEach(System.out::println);
+		}
+	}
+
+}

core-java/streams/fileswithstreams/src/main/resources/books/bookIndex.txt

@@ -0,0 +1,5 @@
+Pride and Prejudice- pride-and-prejudice.pdf
+Anne of Avonlea - anne-of-avonlea.pdf
+Anne of Green Gables  - anne-of-green-gables.pdf
+Matilda  - Matilda.pdf
+Why Icebergs Float - Why-Icebergs-Float.pdf

core-java/streams/fileswithstreams/src/main/resources/cakes.csv

@@ -0,0 +1,6 @@
+#Cakes
+1, Pound Cake,100
+2, Red Velvet Cake,500
+3, Carrot Cake,300
+4, Sponge Cake,400
+5, Chiffon Cake,600

core-java/streams/fileswithstreams/src/main/resources/input.txt

@@ -0,0 +1 @@
+akarui         _ あかるい  _   bright

core-java/streams/fileswithstreams/src/main/resources/paths.properties

@@ -0,0 +1 @@
+/home/u1026/workspace/Learn/junit-5-basics/src/main/resources/books/

resilience4j/bulkhead/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

resilience4j/bulkhead/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

resilience4j/bulkhead/README.md

@@ -0,0 +1,10 @@
+# Bulkhead with Resilience4J
+
+Run the Examples program.
+
+## Blog posts
+
+* [Implementing Bulkhead with Resilience4j](https://reflectoring.io/bulkhead-with-resilience4j)
+
+
+

resilience4j/bulkhead/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

resilience4j/bulkhead/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

resilience4j/bulkhead/pom.xml

@@ -0,0 +1,113 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>io.reflectoring.resilience4j.bulkhead</groupId>
+  <artifactId>bulkhead</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>bulkhead</name>
+  <url>https://reflectoring.io</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.release>11</maven.compiler.release>
+  </properties>
+
+  <dependencies>
+    <!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-retry -->
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-bulkhead</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-core -->
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-core</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-all</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <version>1.18.12</version>
+    </dependency>
+
+    <!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-micrometer -->
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-micrometer</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <!-- https://mvnrepository.com/artifact/io.micrometer/micrometer-core -->
+    <dependency>
+      <groupId>io.micrometer</groupId>
+      <artifactId>micrometer-core</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.11</version>
+      <scope>test</scope>
+    </dependency>
+  </dependencies>
+
+  <build>
+    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+      <plugins>
+        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.1.0</version>
+        </plugin>
+        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+        <plugin>
+          <artifactId>maven-resources-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.8.0</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>2.22.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>2.5.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>2.8.2</version>
+        </plugin>
+        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+        <plugin>
+          <artifactId>maven-site-plugin</artifactId>
+          <version>3.7.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-project-info-reports-plugin</artifactId>
+          <version>3.0.0</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>

resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/Examples.java

@@ -0,0 +1,237 @@
+package io.reflectoring.resilience4j.bulkhead;
+
+import io.github.resilience4j.bulkhead.Bulkhead;
+import io.github.resilience4j.bulkhead.BulkheadConfig;
+import io.github.resilience4j.bulkhead.BulkheadRegistry;
+import io.github.resilience4j.micrometer.tagged.TaggedBulkheadMetrics;
+import io.micrometer.core.instrument.Meter;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
+import io.reflectoring.resilience4j.bulkhead.model.Flight;
+import io.reflectoring.resilience4j.bulkhead.model.SearchRequest;
+import io.reflectoring.resilience4j.bulkhead.services.FlightSearchService;
+import java.time.Duration;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import java.util.stream.StreamSupport;
+
+public class Examples
+{
+    void printDefaultValues() {
+        BulkheadConfig config = BulkheadConfig.ofDefaults();
+        System.out.println("Max concurrent calls = " + config.getMaxConcurrentCalls());
+        System.out.println("Max wait duration = " + config.getMaxWaitDuration());
+        System.out.println("Writable stack trace enabled = " + config.isWritableStackTraceEnabled());
+        System.out.println("Fair call handling enabled = " + config.isFairCallHandlingEnabled());
+    }
+
+    void basicExample() {
+        BulkheadConfig config = BulkheadConfig.custom()
+            .maxConcurrentCalls(2)
+            .maxWaitDuration(Duration.ofSeconds(2))
+            .build();
+        BulkheadRegistry registry = BulkheadRegistry.of(config);
+        Bulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+        FlightSearchService service = new FlightSearchService();
+        SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+        Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request);
+        Supplier<List<Flight>> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+        for (int i=0; i<4; i++) {
+            CompletableFuture
+                .supplyAsync(decoratedFlightsSupplier)
+                .thenAccept(flights -> System.out.println("Received results"));
+        }
+    }
+
+    void basicExample_BulkheadFullException() {
+        BulkheadConfig config = BulkheadConfig.custom()
+            .maxConcurrentCalls(2)
+            .maxWaitDuration(Duration.ofSeconds(1))
+            .build();
+        BulkheadRegistry registry = BulkheadRegistry.of(config);
+        Bulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+        FlightSearchService service = new FlightSearchService();
+        SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+        Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request);
+        Supplier<List<Flight>> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+        for (int i=0; i<3; i++) {
+            CompletableFuture
+                .supplyAsync(decoratedFlightsSupplier)
+                .whenComplete( (r, t) -> {
+                    if (t != null) {
+                        Throwable cause = t.getCause();
+                        if (cause != null) {
+                            cause.printStackTrace();
+                        }
+                    }
+                    if (r != null) {
+                        System.out.println("Received results");
+                    }
+                });
+        }
+    }
+
+    void bulkheadException_WithStackTraceOff() {
+        BulkheadConfig config = BulkheadConfig.custom()
+            .maxConcurrentCalls(2)
+            .maxWaitDuration(Duration.ofSeconds(1))
+            .writableStackTraceEnabled(false)
+            .build();
+        BulkheadRegistry registry = BulkheadRegistry.of(config);
+        Bulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+        FlightSearchService service = new FlightSearchService();
+        SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+        Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request);
+        Supplier<List<Flight>> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+        for (int i=0; i<3; i++) {
+            CompletableFuture
+                .supplyAsync(decoratedFlightsSupplier)
+                .whenComplete( (r, t) -> {
+                    if (t != null) {
+                        Throwable cause = t.getCause();
+                        if (cause != null) {
+                            cause.printStackTrace();
+                        }
+                    }
+                    if (r != null) {
+                        System.out.println("Received results");
+                    }
+                });
+        }
+
+    }
+
+    void eventsExample() {
+        BulkheadConfig config = BulkheadConfig.custom()
+                                    .maxWaitDuration(Duration.ofMillis(500))
+                                    .maxConcurrentCalls(3)
+                                    .build();
+
+        BulkheadRegistry registry = BulkheadRegistry.of(config);
+        Bulkhead bulkhead = registry.bulkhead("flightSearch");
+
+        bulkhead.getEventPublisher().onCallPermitted(e -> System.out.println(e.toString()));
+        bulkhead.getEventPublisher().onCallFinished(e -> System.out.println(e.toString()));
+        bulkhead.getEventPublisher().onCallRejected(e -> System.out.println(e.toString()));
+
+        FlightSearchService service = new FlightSearchService();
+        SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+        Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingRandomTime(request);
+        Supplier<List<Flight>> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+        for (int i=0; i<5; i++) {
+            CompletableFuture
+                .supplyAsync(decoratedFlightsSupplier)
+                .whenComplete( (r, t) -> {
+                    if (t != null) {
+                        t.printStackTrace();
+                    }
+                    if (r != null) {
+                        System.out.println("Received results");
+                    }
+                });
+        }
+    }
+
+    void metricsExample() {
+        BulkheadConfig config = BulkheadConfig.custom()
+            .maxWaitDuration(Duration.ofMillis(500))
+            .maxConcurrentCalls(8)
+            .build();
+
+        BulkheadRegistry registry = BulkheadRegistry.of(config);
+        Bulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+        MeterRegistry meterRegistry = new SimpleMeterRegistry();
+        TaggedBulkheadMetrics.ofBulkheadRegistry(registry).bindTo(meterRegistry);
+
+        bulkhead.getEventPublisher().onCallPermitted(e -> printMetricDetails(meterRegistry));
+        bulkhead.getEventPublisher().onCallRejected(e -> printMetricDetails(meterRegistry));
+        bulkhead.getEventPublisher().onCallFinished(e -> printMetricDetails(meterRegistry));
+
+        FlightSearchService service = new FlightSearchService();
+        SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+        Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingRandomTime(request);
+        Supplier<List<Flight>> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+        for (int i=0; i<5; i++) {
+            CompletableFuture.supplyAsync(decoratedFlightsSupplier)
+                             .whenComplete( (r, t) -> {
+                                 if (r != null) {
+                                    System.out.println("Received results");
+                                }
+             });
+        }
+    }
+
+    void printMetricDetails(MeterRegistry meterRegistry) {
+        Consumer<Meter> meterConsumer = meter -> {
+            String desc = meter.getId().getDescription();
+            String metricName = meter.getId().getName();
+            Double metricValue = StreamSupport.stream(meter.measure().spliterator(), false)
+                .filter(m -> m.getStatistic().name().equals("VALUE"))
+                .findFirst()
+                .map(m -> m.getValue())
+                .orElse(0.0);
+            System.out.println(desc + " - " + metricName + ": " + metricValue);
+        };
+        meterRegistry.forEachMeter(meterConsumer);
+    }
+
+    static void delay(int seconds) {
+        // sleep to simulate delay
+        try {
+            Thread.sleep(seconds * 1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+
+
+
+    public static void main( String[] args )
+    {
+        Examples examples = new Examples();
+        System.out.println("---------------------------- printDefaultValues -------------------------------------------");
+        examples.printDefaultValues();
+        System.out.println("-----------------------------------------------------------------------");
+
+        System.out.println("---------------------------- basicExample -------------------------------------------");
+        examples.basicExample();
+        delay(3);
+        System.out.println("-----------------------------------------------------------------------");
+
+        System.out.println("---------------------------- basicExample_BulkheadFullException -------------------------------------------");
+        examples.basicExample_BulkheadFullException();
+        delay(3);
+        System.out.println("-----------------------------------------------------------------------");
+
+        System.out.println("---------------------------- bulkheadException_WithStackTraceOff -------------------------------------------");
+        examples.bulkheadException_WithStackTraceOff();
+        delay(10);
+        System.out.println("-----------------------------------------------------------------------");
+
+        System.out.println("---------------------------- eventsExample -------------------------------------------");
+        examples.eventsExample();
+        delay(5); // delay just to let the above operation complete
+        System.out.println("-----------------------------------------------------------------------");
+
+        System.out.println("---------------------------- metricsExample -------------------------------------------");
+        examples.metricsExample();
+        delay(15);
+        System.out.println("-----------------------------------------------------------------------");
+    }
+}

resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/ThreadpoolBulkheadExamples.java

@@ -0,0 +1,302 @@
+package io.reflectoring.resilience4j.bulkhead;
+
+import io.github.resilience4j.bulkhead.ThreadPoolBulkhead;
+import io.github.resilience4j.bulkhead.ThreadPoolBulkheadConfig;
+import io.github.resilience4j.bulkhead.ThreadPoolBulkheadRegistry;
+import io.github.resilience4j.micrometer.tagged.TaggedThreadPoolBulkheadMetrics;
+import io.micrometer.core.instrument.Meter;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
+import io.reflectoring.resilience4j.bulkhead.model.Flight;
+import io.reflectoring.resilience4j.bulkhead.model.SearchRequest;
+import io.reflectoring.resilience4j.bulkhead.services.FlightSearchService;
+import io.reflectoring.resilience4j.bulkhead.utils.RequestTrackingIdHolder;
+import io.reflectoring.resilience4j.bulkhead.utils.RequestTrackingIdPropagator;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.CompletionStage;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import java.util.stream.StreamSupport;
+
+public class ThreadpoolBulkheadExamples
+{
+  void printDefaultValues() {
+    ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.ofDefaults();
+    System.out.println("Max thread pool size = " + config.getMaxThreadPoolSize());
+    System.out.println("Max core thread pool size = " + config.getCoreThreadPoolSize());
+    System.out.println("Keep alive duration  = " + config.getKeepAliveDuration());
+    System.out.println("Queue capacity = " + config.getQueueCapacity());
+  }
+
+  void basicExample() {
+    ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom()
+        .maxThreadPoolSize(2)
+        .coreThreadPoolSize(1)
+        .queueCapacity(1)
+        .build();
+    ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config);
+    ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request);
+    Supplier<CompletionStage<List<Flight>>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+    for (int i=0; i<3; i++) {
+      decoratedFlightsSupplier
+          .get()
+          .whenComplete((r,t) -> {
+            if (r != null) {
+              System.out.println("Received results");
+            }
+            if (t != null) {
+              t.printStackTrace();
+            }
+          });
+    }
+  }
+
+  void basicExample_BulkheadFullException() {
+    ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom()
+        .maxThreadPoolSize(2)
+        .coreThreadPoolSize(1)
+        .queueCapacity(1)
+        .build();
+    ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config);
+    ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request);
+    Supplier<CompletionStage<List<Flight>>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+    for (int i=0; i<4; i++) {
+      decoratedFlightsSupplier
+          .get()
+          .whenComplete((r,t) -> {
+            if (r != null) {
+              System.out.println("Received results");
+            }
+            if (t != null) {
+              t.printStackTrace();
+            }
+          });
+    }
+  }
+
+  void bulkheadException_WithStackTraceOff() {
+    ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom()
+        .maxThreadPoolSize(2)
+        .coreThreadPoolSize(1)
+        .queueCapacity(1)
+        .writableStackTraceEnabled(false)
+        .build();
+    ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config);
+    ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request);
+    Supplier<CompletionStage<List<Flight>>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+    for (int i=0; i<4; i++) {
+      decoratedFlightsSupplier
+          .get()
+          .whenComplete((r,t) -> {
+            if (r != null) {
+              System.out.println("Received results");
+            }
+            if (t != null) {
+              t.printStackTrace();
+            }
+          });
+    }
+  }
+
+  void metricsExample() {
+    ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom()
+        .maxThreadPoolSize(5)
+        .coreThreadPoolSize(3)
+        .queueCapacity(5)
+        .writableStackTraceEnabled(false)
+        .build();
+    ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config);
+    ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+    MeterRegistry meterRegistry = new SimpleMeterRegistry();
+    TaggedThreadPoolBulkheadMetrics.ofThreadPoolBulkheadRegistry(registry).bindTo(meterRegistry);
+
+    bulkhead.getEventPublisher().onCallPermitted(e -> printMetricDetails(meterRegistry));
+    bulkhead.getEventPublisher().onCallRejected(e -> printMetricDetails(meterRegistry));
+    bulkhead.getEventPublisher().onCallFinished(e -> printMetricDetails(meterRegistry));
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request);
+    Supplier<CompletionStage<List<Flight>>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+    for (int i=0; i<11; i++) {
+      decoratedFlightsSupplier
+          .get()
+          .whenComplete((r,t) -> {
+            if (r != null) {
+              System.out.println("Received results");
+            }
+            if (t != null) {
+              t.printStackTrace();
+            }
+          });
+    }
+  }
+
+  void contextPropagationExample_WithoutContextPropagator() {
+    ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom()
+        .maxThreadPoolSize(2)
+        .coreThreadPoolSize(1)
+        .queueCapacity(1)
+        .build();
+    ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config);
+    ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond_PrintCorrelationId(request);
+    Supplier<CompletionStage<List<Flight>>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+    for (int i=0; i<2; i++) {
+      String trackingId = UUID.randomUUID().toString();
+      System.out.println("Setting trackingId " + trackingId + " on parent, main thread before calling flight search");
+      RequestTrackingIdHolder.setRequestTrackingId(trackingId);
+      decoratedFlightsSupplier
+          .get()
+          .whenComplete((r,t) -> {
+            if (r != null) {
+              System.out.println("Received results");
+            }
+            if (t != null) {
+              t.printStackTrace();
+            }
+          });
+    }
+  }
+
+
+  void contextPropagationExample_WithPropagation() {
+    ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom()
+        .maxThreadPoolSize(2)
+        .coreThreadPoolSize(1)
+        .queueCapacity(1)
+        .contextPropagator(new RequestTrackingIdPropagator())
+        .build();
+    ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config);
+    ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingOneSecond_PrintCorrelationId(request);
+    Supplier<CompletionStage<List<Flight>>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier);
+
+    for (int i=0; i<2; i++) {
+      String trackingId = UUID.randomUUID().toString();
+      System.out.println("Setting trackingId " + trackingId + " on parent, main thread before calling flight search");
+      RequestTrackingIdHolder.setRequestTrackingId(trackingId);
+      decoratedFlightsSupplier
+          .get()
+          .whenComplete((r,t) -> {
+            if (r != null) {
+              System.out.println("Received results");
+            }
+            if (t != null) {
+              t.printStackTrace();
+            }
+          });
+    }
+  }
+
+  void printMetricDetails(MeterRegistry meterRegistry) {
+    Consumer<Meter> meterConsumer = meter -> {
+      String desc = meter.getId().getDescription();
+      String metricName = meter.getId().getName();
+      Double metricValue = StreamSupport.stream(meter.measure().spliterator(), false)
+          .filter(m -> m.getStatistic().name().equals("VALUE"))
+          .findFirst()
+          .map(m -> m.getValue())
+          .orElse(0.0);
+      System.out.println(desc + " - " + metricName + ": " + metricValue);
+    };
+    meterRegistry.forEachMeter(meterConsumer);
+  }
+
+  static void delay(int seconds) {
+    // sleep to simulate delay
+    try {
+      Thread.sleep(seconds * 1000);
+    } catch (InterruptedException e) {
+      e.printStackTrace();
+    }
+  }
+
+  public static void main( String[] args )
+  {
+    ThreadpoolBulkheadExamples  examples = new ThreadpoolBulkheadExamples();
+    System.out.println("---------------------------- printDefaultValues -------------------------------------------");
+    examples.printDefaultValues();
+    System.out.println("-----------------------------------------------------------------------");
+
+    System.out.println("---------------------------- basicExample -------------------------------------------");
+    examples.basicExample();
+    delay(5);
+    System.out.println("-----------------------------------------------------------------------");
+
+
+    System.out.println("---------------------------- basicExample_BulkheadFullException -------------------------------------------");
+    try {
+      examples.basicExample_BulkheadFullException();
+    }
+    catch (Exception e) {
+      // do nothing
+    }
+    delay(10);
+    System.out.println("-----------------------------------------------------------------------");
+
+
+    System.out.println("---------------------------- bulkheadException_WithStackTraceOff -------------------------------------------");
+    try {
+      examples.bulkheadException_WithStackTraceOff();
+    }
+    catch (Exception e) {
+      // do nothing
+    }
+    delay(10);
+    System.out.println("-----------------------------------------------------------------------");
+
+
+    System.out.println("---------------------------- metricsExample -------------------------------------------");
+    try {
+      examples.metricsExample();
+    }
+    catch (Exception e) {
+
+    }
+    delay(15);
+    System.out.println("-----------------------------------------------------------------------");
+
+
+    System.out.println("---------------------------- contextPropagationExample_WithoutContextPropagator -------------------------------------------");
+    examples.contextPropagationExample_WithoutContextPropagator();
+    System.out.println("-----------------------------------------------------------------------");
+
+
+    System.out.println("---------------------------- contextPropagationExample_WithPropagation -------------------------------------------");
+    examples.contextPropagationExample_WithPropagation();
+    delay(10);
+    System.out.println("-----------------------------------------------------------------------");
+  }
+}

resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/Flight.java

@@ -0,0 +1,60 @@
+package io.reflectoring.resilience4j.bulkhead.model;
+
+public class Flight {
+    String flightNumber;
+    String flightDate;
+    String from;
+    String to;
+
+    public Flight() {
+    }
+
+    public Flight(String flightNumber, String flightDate, String from, String to) {
+        this.flightNumber = flightNumber;
+        this.flightDate = flightDate;
+        this.from = from;
+        this.to = to;
+    }
+
+    public String getFlightNumber() {
+        return flightNumber;
+    }
+
+    public void setFlightNumber(String flightNumber) {
+        this.flightNumber = flightNumber;
+    }
+
+    public String getFlightDate() {
+        return flightDate;
+    }
+
+    public void setFlightDate(String flightDate) {
+        this.flightDate = flightDate;
+    }
+
+    public String getFrom() {
+        return from;
+    }
+
+    public void setFrom(String from) {
+        this.from = from;
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public void setTo(String to) {
+        this.to = to;
+    }
+
+    @Override
+    public String toString() {
+        return "Flight{" +
+                "flightNumber='" + flightNumber + '\'' +
+                ", flightDate='" + flightDate + '\'' +
+                ", from='" + from + '\'' +
+                ", to='" + to + '\'' +
+                '}';
+    }
+}

resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/SearchRequest.java

@@ -0,0 +1,25 @@
+package io.reflectoring.resilience4j.bulkhead.model;
+
+public class SearchRequest {
+    String from;
+    String to;
+    String flightDate;
+
+    public SearchRequest(String from, String to, String flightDate) {
+        this.from = from;
+        this.to = to;
+        this.flightDate = flightDate;
+    }
+
+    public String getFrom() {
+        return from;
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public String getFlightDate() {
+        return flightDate;
+    }
+}

resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/services/FlightSearchService.java

@@ -0,0 +1,70 @@
+package io.reflectoring.resilience4j.bulkhead.services;
+
+import io.reflectoring.resilience4j.bulkhead.model.Flight;
+import io.reflectoring.resilience4j.bulkhead.model.SearchRequest;
+import io.reflectoring.resilience4j.bulkhead.utils.RequestTrackingIdHolder;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+
+public class FlightSearchService {
+    Random random = new Random();
+    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS");
+
+    public List<Flight> searchFlightsTakingRandomTime(SearchRequest request) {
+        long delay = random.nextInt(3000);
+        try {
+            Thread.sleep(delay);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        System.out.println("Searching for flights; "
+            + "current time = " + LocalDateTime.now().format(formatter) +
+            "; current thread = " + Thread.currentThread().getName());
+
+        List<Flight> flights = Arrays.asList(
+            new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
+            new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo())
+        );
+        System.out.println("Flight search successful");
+        return flights;
+    }
+
+    public List<Flight> searchFlightsTakingOneSecond(SearchRequest request) {
+        try {
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        System.out.println("Searching for flights; "
+            + "current time = " + LocalDateTime.now().format(formatter) +
+            "; current thread = " + Thread.currentThread().getName());
+
+        List<Flight> flights = Arrays.asList(
+            new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
+            new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo())
+        );
+        System.out.println("Flight search successful at " + LocalDateTime.now().format(formatter));
+        return flights;
+    }
+
+    public List<Flight> searchFlightsTakingOneSecond_PrintCorrelationId(SearchRequest request) {
+        try {
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        System.out.println("Searching for flights; "
+            + "current time = " + LocalDateTime.now().format(formatter) +
+            "; current thread = " + Thread.currentThread().getName() + "; Request Tracking Id = " + RequestTrackingIdHolder.getRequestTrackingId());
+
+        List<Flight> flights = Arrays.asList(
+            new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
+            new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo())
+        );
+        System.out.println("Flight search successful at " + LocalDateTime.now().format(formatter));
+        return flights;
+    }
+}

resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdHolder.java

@@ -0,0 +1,22 @@
+package io.reflectoring.resilience4j.bulkhead.utils;
+
+public class RequestTrackingIdHolder {
+  private static ThreadLocal<String> threadLocal = new ThreadLocal<>();
+
+  public static String getRequestTrackingId() {
+    return threadLocal.get();
+  }
+
+  public static void setRequestTrackingId(String id) {
+    if (threadLocal.get() != null) {
+      threadLocal.set(null);
+      threadLocal.remove();
+    }
+    threadLocal.set(id);
+  }
+
+  public static void clear() {
+    threadLocal.set(null);
+    threadLocal.remove();
+  }
+}

resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdPropagator.java

@@ -0,0 +1,30 @@
+package io.reflectoring.resilience4j.bulkhead.utils;
+
+import io.github.resilience4j.bulkhead.ContextPropagator;
+import java.util.Optional;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+
+public class RequestTrackingIdPropagator implements ContextPropagator {
+  @Override
+  public Supplier<Optional> retrieve() {
+    System.out.println("Getting request tracking id from thread: " + Thread.currentThread().getName());
+    return () -> Optional.of(RequestTrackingIdHolder.getRequestTrackingId());
+  }
+
+  @Override
+  public Consumer<Optional> copy() {
+    return optional -> {
+      System.out.println("Setting request tracking id " + optional.get() + " on thread: " + Thread.currentThread().getName());
+      optional.ifPresent(s -> RequestTrackingIdHolder.setRequestTrackingId(s.toString()));
+    };
+  }
+
+  @Override
+  public Consumer<Optional> clear() {
+    return optional -> {
+      System.out.println("Clearing request tracking id on thread: " + Thread.currentThread().getName());
+      optional.ifPresent(s -> RequestTrackingIdHolder.clear());
+    };
+  }
+}

resilience4j/ratelimiter/pom.xml

@@ -13,8 +13,6 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-<!--    <maven.compiler.source>1.8</maven.compiler.source>-->
-<!--    <maven.compiler.target>1.8</maven.compiler.target>-->
     <maven.compiler.release>11</maven.compiler.release>
   </properties>
 

resilience4j/timelimiter/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

resilience4j/timelimiter/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

resilience4j/timelimiter/Readme.md

@@ -0,0 +1,5 @@
+Code for the examples used in the article at 
+https://reflectoring.io/time-limiting-with-resilience4j
+
+Run the Examples program.
+

resilience4j/timelimiter/mvnw

@@ -0,0 +1,310 @@
+#!/bin/sh
+# ----------------------------------------------------------------------------
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven Start Up Batch script
+#
+# Required ENV vars:
+# ------------------
+#   JAVA_HOME - location of a JDK home dir
+#
+# Optional ENV vars
+# -----------------
+#   M2_HOME - location of maven2's installed home dir
+#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
+#     e.g. to debug Maven itself, use
+#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+# ----------------------------------------------------------------------------
+
+if [ -z "$MAVEN_SKIP_RC" ] ; then
+
+  if [ -f /etc/mavenrc ] ; then
+    . /etc/mavenrc
+  fi
+
+  if [ -f "$HOME/.mavenrc" ] ; then
+    . "$HOME/.mavenrc"
+  fi
+
+fi
+
+# OS specific support.  $var _must_ be set to either true or false.
+cygwin=false;
+darwin=false;
+mingw=false
+case "`uname`" in
+  CYGWIN*) cygwin=true ;;
+  MINGW*) mingw=true;;
+  Darwin*) darwin=true
+    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
+    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
+    if [ -z "$JAVA_HOME" ]; then
+      if [ -x "/usr/libexec/java_home" ]; then
+        export JAVA_HOME="`/usr/libexec/java_home`"
+      else
+        export JAVA_HOME="/Library/Java/Home"
+      fi
+    fi
+    ;;
+esac
+
+if [ -z "$JAVA_HOME" ] ; then
+  if [ -r /etc/gentoo-release ] ; then
+    JAVA_HOME=`java-config --jre-home`
+  fi
+fi
+
+if [ -z "$M2_HOME" ] ; then
+  ## resolve links - $0 may be a link to maven's home
+  PRG="$0"
+
+  # need this for relative symlinks
+  while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+      PRG="$link"
+    else
+      PRG="`dirname "$PRG"`/$link"
+    fi
+  done
+
+  saveddir=`pwd`
+
+  M2_HOME=`dirname "$PRG"`/..
+
+  # make it fully qualified
+  M2_HOME=`cd "$M2_HOME" && pwd`
+
+  cd "$saveddir"
+  # echo Using m2 at $M2_HOME
+fi
+
+# For Cygwin, ensure paths are in UNIX format before anything is touched
+if $cygwin ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --unix "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
+fi
+
+# For Mingw, ensure paths are in UNIX format before anything is touched
+if $mingw ; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME="`(cd "$M2_HOME"; pwd)`"
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
+fi
+
+if [ -z "$JAVA_HOME" ]; then
+  javaExecutable="`which javac`"
+  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
+    # readlink(1) is not available as standard on Solaris 10.
+    readLink=`which readlink`
+    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
+      if $darwin ; then
+        javaHome="`dirname \"$javaExecutable\"`"
+        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
+      else
+        javaExecutable="`readlink -f \"$javaExecutable\"`"
+      fi
+      javaHome="`dirname \"$javaExecutable\"`"
+      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
+      JAVA_HOME="$javaHome"
+      export JAVA_HOME
+    fi
+  fi
+fi
+
+if [ -z "$JAVACMD" ] ; then
+  if [ -n "$JAVA_HOME"  ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+      # IBM's JDK on AIX uses strange locations for the executables
+      JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+      JAVACMD="$JAVA_HOME/bin/java"
+    fi
+  else
+    JAVACMD="`which java`"
+  fi
+fi
+
+if [ ! -x "$JAVACMD" ] ; then
+  echo "Error: JAVA_HOME is not defined correctly." >&2
+  echo "  We cannot execute $JAVACMD" >&2
+  exit 1
+fi
+
+if [ -z "$JAVA_HOME" ] ; then
+  echo "Warning: JAVA_HOME environment variable is not set."
+fi
+
+CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
+
+# traverses directory structure from process work directory to filesystem root
+# first directory with .mvn subdirectory is considered project base directory
+find_maven_basedir() {
+
+  if [ -z "$1" ]
+  then
+    echo "Path not specified to find_maven_basedir"
+    return 1
+  fi
+
+  basedir="$1"
+  wdir="$1"
+  while [ "$wdir" != '/' ] ; do
+    if [ -d "$wdir"/.mvn ] ; then
+      basedir=$wdir
+      break
+    fi
+    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
+    if [ -d "${wdir}" ]; then
+      wdir=`cd "$wdir/.."; pwd`
+    fi
+    # end of workaround
+  done
+  echo "${basedir}"
+}
+
+# concatenates all lines of a file
+concat_lines() {
+  if [ -f "$1" ]; then
+    echo "$(tr -s '\n' ' ' < "$1")"
+  fi
+}
+
+BASE_DIR=`find_maven_basedir "$(pwd)"`
+if [ -z "$BASE_DIR" ]; then
+  exit 1;
+fi
+
+##########################################################################################
+# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+# This allows using the maven wrapper in projects that prohibit checking in binary data.
+##########################################################################################
+if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Found .mvn/wrapper/maven-wrapper.jar"
+    fi
+else
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
+    fi
+    if [ -n "$MVNW_REPOURL" ]; then
+      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    else
+      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    fi
+    while IFS="=" read key value; do
+      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
+      esac
+    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
+    if [ "$MVNW_VERBOSE" = true ]; then
+      echo "Downloading from: $jarUrl"
+    fi
+    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
+    if $cygwin; then
+      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
+    fi
+
+    if command -v wget > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found wget ... using wget"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            wget "$jarUrl" -O "$wrapperJarPath"
+        else
+            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
+        fi
+    elif command -v curl > /dev/null; then
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Found curl ... using curl"
+        fi
+        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
+            curl -o "$wrapperJarPath" "$jarUrl" -f
+        else
+            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
+        fi
+
+    else
+        if [ "$MVNW_VERBOSE" = true ]; then
+          echo "Falling back to using Java to download"
+        fi
+        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
+        # For Cygwin, switch paths to Windows format before running javac
+        if $cygwin; then
+          javaClass=`cygpath --path --windows "$javaClass"`
+        fi
+        if [ -e "$javaClass" ]; then
+            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Compiling MavenWrapperDownloader.java ..."
+                fi
+                # Compiling the Java class
+                ("$JAVA_HOME/bin/javac" "$javaClass")
+            fi
+            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
+                # Running the downloader
+                if [ "$MVNW_VERBOSE" = true ]; then
+                  echo " - Running MavenWrapperDownloader.java ..."
+                fi
+                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
+            fi
+        fi
+    fi
+fi
+##########################################################################################
+# End of extension
+##########################################################################################
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+if [ "$MVNW_VERBOSE" = true ]; then
+  echo $MAVEN_PROJECTBASEDIR
+fi
+MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
+
+# For Cygwin, switch paths to Windows format before running java
+if $cygwin; then
+  [ -n "$M2_HOME" ] &&
+    M2_HOME=`cygpath --path --windows "$M2_HOME"`
+  [ -n "$JAVA_HOME" ] &&
+    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
+  [ -n "$CLASSPATH" ] &&
+    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
+  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
+    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
+fi
+
+# Provide a "standardized" way to retrieve the CLI args that will
+# work with both Windows and non-Windows executions.
+MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
+export MAVEN_CMD_LINE_ARGS
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$JAVACMD" \
+  $MAVEN_OPTS \
+  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
+  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
+  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"

resilience4j/timelimiter/mvnw.cmd

@@ -0,0 +1,182 @@
+@REM ----------------------------------------------------------------------------
+@REM Licensed to the Apache Software Foundation (ASF) under one
+@REM or more contributor license agreements.  See the NOTICE file
+@REM distributed with this work for additional information
+@REM regarding copyright ownership.  The ASF licenses this file
+@REM to you under the Apache License, Version 2.0 (the
+@REM "License"); you may not use this file except in compliance
+@REM with the License.  You may obtain a copy of the License at
+@REM
+@REM    http://www.apache.org/licenses/LICENSE-2.0
+@REM
+@REM Unless required by applicable law or agreed to in writing,
+@REM software distributed under the License is distributed on an
+@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+@REM KIND, either express or implied.  See the License for the
+@REM specific language governing permissions and limitations
+@REM under the License.
+@REM ----------------------------------------------------------------------------
+
+@REM ----------------------------------------------------------------------------
+@REM Maven Start Up Batch script
+@REM
+@REM Required ENV vars:
+@REM JAVA_HOME - location of a JDK home dir
+@REM
+@REM Optional ENV vars
+@REM M2_HOME - location of maven2's installed home dir
+@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
+@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
+@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
+@REM     e.g. to debug Maven itself, use
+@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
+@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
+@REM ----------------------------------------------------------------------------
+
+@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
+@echo off
+@REM set title of command window
+title %0
+@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
+@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
+
+@REM set %HOME% to equivalent of $HOME
+if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
+
+@REM Execute a user defined script before this one
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
+@REM check for pre script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
+if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
+:skipRcPre
+
+@setlocal
+
+set ERROR_CODE=0
+
+@REM To isolate internal variables from possible post scripts, we use another setlocal
+@setlocal
+
+@REM ==== START VALIDATION ====
+if not "%JAVA_HOME%" == "" goto OkJHome
+
+echo.
+echo Error: JAVA_HOME not found in your environment. >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+:OkJHome
+if exist "%JAVA_HOME%\bin\java.exe" goto init
+
+echo.
+echo Error: JAVA_HOME is set to an invalid directory. >&2
+echo JAVA_HOME = "%JAVA_HOME%" >&2
+echo Please set the JAVA_HOME variable in your environment to match the >&2
+echo location of your Java installation. >&2
+echo.
+goto error
+
+@REM ==== END VALIDATION ====
+
+:init
+
+@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
+@REM Fallback to current working directory if not found.
+
+set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
+IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
+
+set EXEC_DIR=%CD%
+set WDIR=%EXEC_DIR%
+:findBaseDir
+IF EXIST "%WDIR%"\.mvn goto baseDirFound
+cd ..
+IF "%WDIR%"=="%CD%" goto baseDirNotFound
+set WDIR=%CD%
+goto findBaseDir
+
+:baseDirFound
+set MAVEN_PROJECTBASEDIR=%WDIR%
+cd "%EXEC_DIR%"
+goto endDetectBaseDir
+
+:baseDirNotFound
+set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
+cd "%EXEC_DIR%"
+
+:endDetectBaseDir
+
+IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
+
+@setlocal EnableExtensions EnableDelayedExpansion
+for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
+@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
+
+:endReadAdditionalConfig
+
+SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
+set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
+set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+
+FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
+    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
+)
+
+@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
+@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
+if exist %WRAPPER_JAR% (
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Found %WRAPPER_JAR%
+    )
+) else (
+    if not "%MVNW_REPOURL%" == "" (
+        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
+    )
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Couldn't find %WRAPPER_JAR%, downloading it ...
+        echo Downloading from: %DOWNLOAD_URL%
+    )
+
+    powershell -Command "&{"^
+		"$webclient = new-object System.Net.WebClient;"^
+		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
+		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
+		"}"^
+		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
+		"}"
+    if "%MVNW_VERBOSE%" == "true" (
+        echo Finished downloading %WRAPPER_JAR%
+    )
+)
+@REM End of extension
+
+@REM Provide a "standardized" way to retrieve the CLI args that will
+@REM work with both Windows and non-Windows executions.
+set MAVEN_CMD_LINE_ARGS=%*
+
+%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
+if ERRORLEVEL 1 goto error
+goto end
+
+:error
+set ERROR_CODE=1
+
+:end
+@endlocal & set ERROR_CODE=%ERROR_CODE%
+
+if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
+@REM check for post script, once with legacy .bat ending and once with .cmd ending
+if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
+if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
+:skipRcPost
+
+@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
+if "%MAVEN_BATCH_PAUSE%" == "on" pause
+
+if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
+
+exit /B %ERROR_CODE%

resilience4j/timelimiter/pom.xml

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="UTF-8"?>
+
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+  <modelVersion>4.0.0</modelVersion>
+
+  <groupId>io.reflectoring.resilience4j.timelimiter</groupId>
+  <artifactId>timelimiter</artifactId>
+  <version>1.0-SNAPSHOT</version>
+
+  <name>timelimiter</name>
+  <url>https://reflectoring.io</url>
+
+  <properties>
+    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    <maven.compiler.release>11</maven.compiler.release>
+  </properties>
+
+  <dependencies>
+    <dependency>
+      <groupId>junit</groupId>
+      <artifactId>junit</artifactId>
+      <version>4.11</version>
+      <scope>test</scope>
+    </dependency>
+
+    <!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-retry -->
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-timelimiter</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-core -->
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-core</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-all</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <dependency>
+      <groupId>org.projectlombok</groupId>
+      <artifactId>lombok</artifactId>
+      <version>1.18.12</version>
+    </dependency>
+
+    <!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-micrometer -->
+    <dependency>
+      <groupId>io.github.resilience4j</groupId>
+      <artifactId>resilience4j-micrometer</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+    <!-- https://mvnrepository.com/artifact/io.micrometer/micrometer-core -->
+    <dependency>
+      <groupId>io.micrometer</groupId>
+      <artifactId>micrometer-core</artifactId>
+      <version>1.5.0</version>
+    </dependency>
+
+  </dependencies>
+
+  <build>
+    <pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
+      <plugins>
+        <!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
+        <plugin>
+          <artifactId>maven-clean-plugin</artifactId>
+          <version>3.1.0</version>
+        </plugin>
+        <!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
+        <plugin>
+          <artifactId>maven-resources-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-compiler-plugin</artifactId>
+          <version>3.8.0</version>
+          <configuration>
+            <release>11</release>
+          </configuration>
+        </plugin>
+        <plugin>
+          <artifactId>maven-surefire-plugin</artifactId>
+          <version>2.22.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-jar-plugin</artifactId>
+          <version>3.0.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-install-plugin</artifactId>
+          <version>2.5.2</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-deploy-plugin</artifactId>
+          <version>2.8.2</version>
+        </plugin>
+        <!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
+        <plugin>
+          <artifactId>maven-site-plugin</artifactId>
+          <version>3.7.1</version>
+        </plugin>
+        <plugin>
+          <artifactId>maven-project-info-reports-plugin</artifactId>
+          <version>3.0.0</version>
+        </plugin>
+      </plugins>
+    </pluginManagement>
+  </build>
+</project>

resilience4j/timelimiter/src/main/java/io/reflectoring/resilience4j/timelimiter/Examples.java

@@ -0,0 +1,324 @@
+package io.reflectoring.resilience4j.timelimiter;
+
+import io.github.resilience4j.micrometer.tagged.TaggedTimeLimiterMetrics;
+import io.github.resilience4j.timelimiter.TimeLimiter;
+import io.github.resilience4j.timelimiter.TimeLimiterConfig;
+import io.github.resilience4j.timelimiter.TimeLimiterRegistry;
+import io.micrometer.core.instrument.Measurement;
+import io.micrometer.core.instrument.Meter;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
+import io.reflectoring.resilience4j.timelimiter.model.Flight;
+import io.reflectoring.resilience4j.timelimiter.model.SearchRequest;
+import io.reflectoring.resilience4j.timelimiter.services.FlightSearchService;
+import java.time.Duration;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.CompletionStage;
+import java.util.concurrent.ExecutionException;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.TimeoutException;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import java.util.stream.StreamSupport;
+
+public class Examples {
+
+  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS");
+
+  void printDefaultValues() {
+    TimeLimiterConfig config = TimeLimiterConfig.ofDefaults();
+
+    System.out.println(
+        "getTimeoutDuration in ms = " + Duration.from(config.getTimeoutDuration()).toMillis());
+    System.out.println("shouldCancelRunningFuture = " + config.shouldCancelRunningFuture());
+  }
+
+  void basicExample_Successful() {
+    TimeLimiterConfig config = TimeLimiterConfig.custom()
+        .timeoutDuration(Duration.ofSeconds(2))
+        .build();
+
+    TimeLimiterRegistry registry = TimeLimiterRegistry.of(config);
+    TimeLimiter limiter = registry.timeLimiter("flightSearch");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+    Supplier<List<Flight>> flightSupplier = () -> service.searchFlightsTakingOneSecond(request);
+    Supplier<CompletionStage<List<Flight>>> origCompletionStageSupplier = () -> CompletableFuture
+        .supplyAsync(flightSupplier);
+    ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
+    Supplier<CompletionStage<List<Flight>>> decoratedCompletionStageSupplier = limiter
+        .decorateCompletionStage(scheduler, origCompletionStageSupplier);
+
+    decoratedCompletionStageSupplier.get().whenComplete((result, ex) -> {
+      if (ex != null) {
+        System.out.println("Exception " +
+            ex.getMessage() +
+            " on thread " +
+            Thread.currentThread().getName() +
+            " at " +
+            LocalDateTime.now().format(formatter));
+      }
+      if (result != null) {
+        System.out.println(result + " on thread " + Thread.currentThread().getName());
+      }
+    });
+
+    scheduler.shutdown();
+  }
+
+  void basicExample_TimeoutException() {
+    TimeLimiterConfig config = TimeLimiterConfig.custom()
+        .timeoutDuration(Duration.ofMillis(500))
+        .build();
+
+    TimeLimiterRegistry registry = TimeLimiterRegistry.of(config);
+    TimeLimiter limiter = registry.timeLimiter("flightSearch");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+    Supplier<List<Flight>> flightSupplier = () -> service.searchFlightsTakingOneSecond(request);
+    Supplier<CompletionStage<List<Flight>>> origCompletionStageSupplier = () -> CompletableFuture
+        .supplyAsync(flightSupplier);
+    ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
+    Supplier<CompletionStage<List<Flight>>> decoratedCompletionStageSupplier = limiter
+        .decorateCompletionStage(scheduler, origCompletionStageSupplier);
+
+    decoratedCompletionStageSupplier.get().whenComplete((result, ex) -> {
+      if (ex != null) {
+        System.out.println("Exception " +
+            ex.getMessage() +
+            " on thread " +
+            Thread.currentThread().getName() +
+            " at " +
+            LocalDateTime.now().format(formatter));
+      }
+      if (result != null) {
+        System.out.println(result + " on thread " + Thread.currentThread().getName());
+      }
+    });
+
+    scheduler.shutdown();
+  }
+
+  void basicExample_ExcecuteCompletionStage() {
+    TimeLimiterConfig config = TimeLimiterConfig.custom()
+        .timeoutDuration(Duration.ofMillis(500))
+        .build();
+
+    TimeLimiterRegistry registry = TimeLimiterRegistry.of(config);
+    TimeLimiter limiter = registry.timeLimiter("flightSearch");
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020");
+
+    Supplier<List<Flight>> flightSupplier = () -> service.searchFlightsTakingOneSecond(request);
+    Supplier<CompletionStage<List<Flight>>> origCompletionStageSupplier = () -> CompletableFuture
+        .supplyAsync(flightSupplier);
+    ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
+    CompletionStage<List<Flight>> decoratedCompletionStage = limiter
+        .executeCompletionStage(scheduler, origCompletionStageSupplier);
+
+    decoratedCompletionStage.whenComplete((result, ex) -> {
+      if (ex != null) {
+        System.out.println("Exception " +
+            ex.getMessage() +
+            " on thread " +
+            Thread.currentThread().getName() +
+            " at " +
+            LocalDateTime.now().format(formatter));
+      }
+      if (result != null) {
+        System.out.println(result + " on thread " + Thread.currentThread().getName());
+      }
+    });
+
+    scheduler.shutdown();
+  }
+
+
+  void whenToUseExample() {
+    CompletableFuture.supplyAsync(this::slowMethod).thenAccept(System.out::println);
+  }
+
+  void whenToUseExample_Blocking()
+      throws InterruptedException, ExecutionException, TimeoutException {
+    CompletableFuture<Integer> completableFuture = CompletableFuture
+        .supplyAsync(this::slowMethod);
+    Integer result = completableFuture.get(3000, TimeUnit.MILLISECONDS);
+    System.out.println(result);
+  }
+
+  int slowMethod() {
+    System.out.println(Thread.currentThread().getName());
+    // sleep to simulate delay
+    try {
+      Thread.sleep(2000);
+    } catch (InterruptedException e) {
+      e.printStackTrace();
+    }
+    return 0;
+  }
+
+  static void delay(int seconds) {
+    // sleep to simulate delay
+    try {
+      Thread.sleep(seconds * 1000);
+    } catch (InterruptedException e) {
+      e.printStackTrace();
+    }
+  }
+
+  void eventsExample() {
+    TimeLimiterConfig config = TimeLimiterConfig.custom()
+        .cancelRunningFuture(false)
+        .timeoutDuration(Duration.ofSeconds(2))
+        .build();
+    TimeLimiterRegistry registry = TimeLimiterRegistry.of(config);
+    TimeLimiter limiter = registry.timeLimiter("flightSearch");
+
+    limiter.getEventPublisher().onSuccess(e -> System.out.println(e.toString()));
+    limiter.getEventPublisher().onError(e -> System.out.println(e.toString()));
+    limiter.getEventPublisher().onTimeout(e -> System.out.println(e.toString()));
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingRandomTime(request);
+    ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
+    Supplier<CompletionStage<List<Flight>>> origCompletionStageSupplier = () -> CompletableFuture
+        .supplyAsync(flightsSupplier);
+    Supplier<CompletionStage<List<Flight>>> decoratedCompletionStageSupplier = limiter
+        .decorateCompletionStage(scheduler, origCompletionStageSupplier);
+
+    for (int i = 0; i < 10; i++) {
+      int attempt = i;
+      decoratedCompletionStageSupplier
+          .get()
+          .whenComplete((r, t) -> {
+            if (t != null) {
+              System.out.println("Error occurred on search " + attempt + ": " + t.getMessage());
+            }
+            if (r != null) {
+              System.out
+                  .println("Search " + attempt + " successful, found " + r.size() + " flights");
+            }
+          });
+    }
+    scheduler.shutdown();
+  }
+
+  void metricsExample() {
+    TimeLimiterConfig config = TimeLimiterConfig.custom()
+        .cancelRunningFuture(false)
+        .timeoutDuration(Duration.ofSeconds(2))
+        .build();
+    TimeLimiterRegistry registry = TimeLimiterRegistry.of(config);
+    TimeLimiter limiter = registry.timeLimiter("flightSearch");
+
+    MeterRegistry meterRegistry = new SimpleMeterRegistry();
+    TaggedTimeLimiterMetrics.ofTimeLimiterRegistry(registry).bindTo(meterRegistry);
+
+    FlightSearchService service = new FlightSearchService();
+    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
+
+    Supplier<List<Flight>> flightsSupplier = () -> service.searchFlightsTakingRandomTime(request);
+    ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
+    Supplier<CompletionStage<List<Flight>>> origCompletionStageSupplier = () -> CompletableFuture
+        .supplyAsync(flightsSupplier);
+    Supplier<CompletionStage<List<Flight>>> decoratedCompletionStageSupplier = limiter
+        .decorateCompletionStage(scheduler, origCompletionStageSupplier);
+
+    List<CompletableFuture<List<Flight>>> futures = new ArrayList<>();
+    for (int i = 0; i < 10; i++) {
+      int attempt = i;
+      CompletionStage<List<Flight>> stage = decoratedCompletionStageSupplier
+          .get()
+          .whenComplete((r, t) -> {
+            if (t != null) {
+              System.out.println("Error occurred on search " + attempt + ": " + t.getMessage());
+            }
+            if (r != null) {
+              System.out
+                  .println("Search " + attempt + " successful, found " + r.size() + " flights");
+            }
+          });
+
+      futures.add(stage.toCompletableFuture());
+    }
+    CompletableFuture
+        .allOf(futures.toArray(new CompletableFuture[0]))
+        .whenComplete((r, t) -> printMetricDetails(meterRegistry));
+
+    scheduler.shutdown();
+  }
+
+  void printMetricDetails(MeterRegistry meterRegistry) {
+    Consumer<Meter> meterConsumer = meter -> {
+      String desc = meter.getId().getDescription();
+      String metricName = meter.getId().getName();
+      String metricKind = meter.getId().getTag("kind");
+      Double metricValue = StreamSupport.stream(meter.measure().spliterator(), false)
+          .filter(m -> m.getStatistic().name().equals("COUNT"))
+          .findFirst()
+          .map(Measurement::getValue)
+          .orElse(0.0);
+      System.out.println(desc + " - " + metricName + "(" + metricKind + ")" + ": " + metricValue);
+    };
+    meterRegistry.forEachMeter(meterConsumer);
+  }
+
+  public static void main(String[] args) {
+    Examples examples = new Examples();
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("----------------------- printDefaultValues ----------------------------------------------------");
+    examples.printDefaultValues();
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("----------------------- whenToUseExample ----------------------------------------------------");
+    examples.whenToUseExample();
+    delay(2); // delay just to let the above async operation to complete
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("----------------------- whenToUseExample_Blocking ----------------------------------------------------");
+    try {
+      examples.whenToUseExample_Blocking();
+    } catch (InterruptedException | ExecutionException| TimeoutException e) {
+      e.printStackTrace();
+    }
+    delay(2); // delay just to let the above async operation to complete
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("----------------------- basicExample_Successful ----------------------------------------------------");
+    examples.basicExample_Successful();
+
+    delay(2); // delay just to let the above async operation to complete
+
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("----------------------- basicExample_TimeoutException ----------------------------------------------");
+    examples.basicExample_TimeoutException();
+
+    delay(2); // delay just to let the above async operation to complete
+
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("-------------------------basicExample_ExcecuteCompletionStage --------------------------------------");
+    examples.basicExample_ExcecuteCompletionStage();
+
+    delay(2); // delay just to let the above async operation to complete
+
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("----------------------- eventsExample ----------------------------------------------------");
+    examples.eventsExample();
+    delay(10); // delay just to let the above async operation to complete
+    System.out.println("----------------------------------------------------------------------------------------------------");
+    System.out.println("----------------------- metricsExample ----------------------------------------------------");
+    examples.metricsExample();
+    delay(10); // delay just to let the above async operation to complete
+    System.out.println("----------------------------------------------------------------------------------------------------");
+  }
+}

resilience4j/timelimiter/src/main/java/io/reflectoring/resilience4j/timelimiter/model/Flight.java

@@ -0,0 +1,60 @@
+package io.reflectoring.resilience4j.timelimiter.model;
+
+public class Flight {
+    String flightNumber;
+    String flightDate;
+    String from;
+    String to;
+
+    public Flight() {
+    }
+
+    public Flight(String flightNumber, String flightDate, String from, String to) {
+        this.flightNumber = flightNumber;
+        this.flightDate = flightDate;
+        this.from = from;
+        this.to = to;
+    }
+
+    public String getFlightNumber() {
+        return flightNumber;
+    }
+
+    public void setFlightNumber(String flightNumber) {
+        this.flightNumber = flightNumber;
+    }
+
+    public String getFlightDate() {
+        return flightDate;
+    }
+
+    public void setFlightDate(String flightDate) {
+        this.flightDate = flightDate;
+    }
+
+    public String getFrom() {
+        return from;
+    }
+
+    public void setFrom(String from) {
+        this.from = from;
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public void setTo(String to) {
+        this.to = to;
+    }
+
+    @Override
+    public String toString() {
+        return "Flight{" +
+                "flightNumber='" + flightNumber + '\'' +
+                ", flightDate='" + flightDate + '\'' +
+                ", from='" + from + '\'' +
+                ", to='" + to + '\'' +
+                '}';
+    }
+}

resilience4j/timelimiter/src/main/java/io/reflectoring/resilience4j/timelimiter/model/SearchRequest.java

@@ -0,0 +1,25 @@
+package io.reflectoring.resilience4j.timelimiter.model;
+
+public class SearchRequest {
+    String from;
+    String to;
+    String flightDate;
+
+    public SearchRequest(String from, String to, String flightDate) {
+        this.from = from;
+        this.to = to;
+        this.flightDate = flightDate;
+    }
+
+    public String getFrom() {
+        return from;
+    }
+
+    public String getTo() {
+        return to;
+    }
+
+    public String getFlightDate() {
+        return flightDate;
+    }
+}

resilience4j/timelimiter/src/main/java/io/reflectoring/resilience4j/timelimiter/services/FlightSearchService.java

@@ -0,0 +1,51 @@
+package io.reflectoring.resilience4j.timelimiter.services;
+
+import io.reflectoring.resilience4j.timelimiter.model.Flight;
+import io.reflectoring.resilience4j.timelimiter.model.SearchRequest;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Random;
+
+public class FlightSearchService {
+    Random random = new Random();
+    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS");
+
+    public List<Flight> searchFlightsTakingRandomTime(SearchRequest request) {
+        long delay = random.nextInt(3000);
+        try {
+            Thread.sleep(delay);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        System.out.println("Searching for flights; "
+            + "current time = " + LocalDateTime.now().format(formatter) +
+            "; current thread = " + Thread.currentThread().getName());
+
+        List<Flight> flights = Arrays.asList(
+            new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
+            new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo())
+        );
+        System.out.println("Flight search successful");
+        return flights;
+    }
+
+    public List<Flight> searchFlightsTakingOneSecond(SearchRequest request) {
+        try {
+            Thread.sleep(1000);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+        System.out.println("Searching for flights; "
+            + "current time = " + LocalDateTime.now().format(formatter) +
+            "; current thread = " + Thread.currentThread().getName());
+
+        List<Flight> flights = Arrays.asList(
+            new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
+            new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo())
+        );
+        System.out.println("Flight search successful at " + LocalDateTime.now().format(formatter));
+        return flights;
+    }
+}

spring-boot/argumentresolver/README.md

@@ -0,0 +1,5 @@
+# Custom Argument Resolvers with Spring Boot
+
+## Blog posts 
+
+* [Custom Web Controller Arguments with Spring MVC and Spring Boot](https://reflectoring.io/spring-boot-argumentresolver/) 

spring-boot/bean-lifecycle/README.md

@@ -2,4 +2,5 @@
 
 This code shows how to hook in to the phases of the Spring bean lifecycle.
 
-Read more in the Blog post: [Hooking into the Spring Bean Lifecycle](https://reflectoring.io/spring-bean-lifecycle)
+## Blog Posts
+* [Hooking into the Spring Bean Lifecycle](https://reflectoring.io/spring-bean-lifecycle)

spring-boot/bean-lifecycle/src/main/java/io/reflectoring/beanlifecycle/quartz/QuartzConfig.java

@@ -5,6 +5,7 @@ import org.springframework.context.ApplicationContext;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.scheduling.quartz.SchedulerFactoryBean;
+import org.springframework.scheduling.quartz.SpringBeanJobFactory;
 
 @Configuration
 public class QuartzConfig {
@@ -12,17 +13,20 @@ public class QuartzConfig {
     @Autowired
     ApplicationContext applicationContext;
 
+    @Bean
+    public SpringBeanJobFactory springBeanJobFactory() {
+        AutowireCapableJobFactory jobFactory = new AutowireCapableJobFactory();
+        jobFactory.setApplicationContext(applicationContext);
+        return jobFactory;
+    }
+
     /**
      * Create custom {@link SchedulerFactoryBean} for Quartz
      */
     @Bean
     public SchedulerFactoryBean schedulerFactoryBean(){
-        AutowireCapableJobFactory jobFactory = new AutowireCapableJobFactory();
-        jobFactory.setApplicationContext(applicationContext);
-
         SchedulerFactoryBean factoryBean = new SchedulerFactoryBean();
-        factoryBean.setJobFactory(jobFactory);
-
+        factoryBean.setJobFactory(springBeanJobFactory());
         return factoryBean;
     }
 

spring-boot/bean-lifecycle/src/main/java/io/reflectoring/beanlifecycle/quartz/SampleJob.java

@@ -0,0 +1,16 @@
+package io.reflectoring.beanlifecycle.quartz;
+
+import org.quartz.Job;
+import org.quartz.JobExecutionContext;
+import org.springframework.beans.factory.annotation.Autowired;
+
+public class SampleJob implements Job {
+
+    @Autowired
+    private SampleServiceBean service;
+
+    @Override
+    public void execute(JobExecutionContext jobExecutionContext) {
+        service.hello();
+    }
+}

spring-boot/bean-lifecycle/src/main/java/io/reflectoring/beanlifecycle/quartz/SampleServiceBean.java

@@ -0,0 +1,16 @@
+package io.reflectoring.beanlifecycle.quartz;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.stereotype.Service;
+
+@Service
+public class SampleServiceBean {
+
+    Logger logger = LoggerFactory.getLogger(SampleServiceBean.class);
+
+    public void hello() {
+        logger.info("hello from Quartz Job!");
+    }
+
+}

spring-boot/bean-lifecycle/src/test/java/io/reflectoring/beanlifecycle/quartz/SpringQuartzTests.java

@@ -0,0 +1,27 @@
+package io.reflectoring.beanlifecycle.quartz;
+
+import org.junit.jupiter.api.Test;
+import org.quartz.*;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+public class SpringQuartzTests {
+
+    @Autowired
+    Scheduler quartzScheduler;
+
+    @Test
+    public void testQuartzJobHasCapabaleOfAutowireSpringBeans() throws SchedulerException, InterruptedException {
+
+        JobDetail jobDetail = JobBuilder.newJob(SampleJob.class).build();
+        Trigger trigger = TriggerBuilder.newTrigger()
+                .withSchedule(SimpleScheduleBuilder.repeatSecondlyForever())
+                .startNow().build();
+        quartzScheduler.scheduleJob(jobDetail, trigger);
+
+        Thread.sleep(5000);
+
+    }
+
+}

spring-boot/boundaries/README.md

@@ -0,0 +1,5 @@
+# Clean Architecture Boundaries with Spring Boot and ArchUnit
+
+## Blog posts 
+
+* [Clean Architecture Boundaries with Spring Boot and ArchUnit](https://reflectoring.io/java-components-clean-boundaries/) 

spring-boot/cache/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Implementing a Cache with Spring Boot](https://reflectoring.io/spring-boot-cache/)

spring-boot/cache/src/test/java/io/reflectoring/cache/rest/CarResourceClientCacheIntegrationTest.java

@@ -3,6 +3,7 @@ package io.reflectoring.cache.rest;
 
 import com.fasterxml.jackson.databind.ObjectMapper;
 import io.reflectoring.cache.AbstractIntegrationTest;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
@@ -17,6 +18,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 @SpringBootTest
 @AutoConfigureMockMvc
 @ActiveProfiles("client")
+@Disabled("makes problems on Github Actions")
 class CarResourceClientCacheIntegrationTest extends AbstractIntegrationTest {
 
     @Autowired

spring-boot/cache/src/test/java/io/reflectoring/cache/rest/CarResourceEmbeddedCacheIntegrationTest.java

@@ -2,6 +2,7 @@ package io.reflectoring.cache.rest;
 
 
 import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
@@ -16,6 +17,7 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 @SpringBootTest
 @AutoConfigureMockMvc
 @ActiveProfiles("embedded")
+@Disabled("makes problems on Github Actions")
 class CarResourceEmbeddedCacheIntegrationTest {
 
     @Autowired

spring-boot/configuration/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Validate Spring Boot Configuration Parameters at Startup](https://reflectoring.io/validate-spring-boot-configuration-parameters-at-startup/)

spring-boot/data-migration/flyway/README.md

@@ -0,0 +1,4 @@
+# Related Blog Posts
+
+* [One-Stop Guide to Database Migration with Flyway and Spring Boot](https://reflectoring.io/database-migration-spring-boot-flyway/)
+* [Tool-based Database Refactoring: Flyway vs. Liquibase](https://reflectoring.io/database-refactoring-flyway-vs-liquibase/)

spring-boot/data-migration/liquibase/README.md

@@ -17,6 +17,11 @@ The project also demonstrates the following.
 * It demonstrates use of liquibase [change log parameters](src/main/resources/db/changelog/db.changelog-yaml-example.yaml#L21-L33)
 * IT demonstrates use of liquibase [context](src/main/resources/db/changelog/db.changelog-xml-example.xml#L5)
 
+## Related Blog Posts
+
+* [One-Stop Guide to Database Migration with Liquibase and Spring Boot](https://reflectoring.io/database-migration-spring-boot-liquibase/)
+* [Tool-based Database Refactoring: Flyway vs. Liquibase](https://reflectoring.io/database-refactoring-flyway-vs-liquibase/)
+
 ## How to Run the project and tests
 
 ### Have Docker and Docker Compose in your machine?

spring-boot/dependency-injection/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Why You Should Use Constructor Injection in Spring](https://reflectoring.io/constructor-injection/)

spring-boot/hazelcast/hazelcast-client-server/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [https://reflectoring.io/spring-boot-hazelcast/](https://reflectoring.io/spring-boot-hazelcast/)

spring-boot/hazelcast/hazelcast-embedded-cache/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [https://reflectoring.io/spring-boot-hazelcast/](https://reflectoring.io/spring-boot-hazelcast/)

spring-boot/hibernate-search/README.md

@@ -0,0 +1,5 @@
+# Hibernate Search Tutorial
+This example code demonstrates the following:
+* How to configure Hibernate search with Elasticsearch integration
+* How to configure entities for indexing
+* Some examples to queries

spring-boot/hibernate-search/build.gradle

@@ -0,0 +1,40 @@
+plugins {
+    id 'org.springframework.boot' version '2.2.2.RELEASE'
+    id 'io.spring.dependency-management' version '1.0.10.RELEASE'
+    id 'java'
+}
+
+group = 'io.reflectoring'
+version = '1.0.0'
+sourceCompatibility = '11'
+
+configurations {
+    compileOnly {
+        extendsFrom annotationProcessor
+    }
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
+    implementation 'org.springframework.boot:spring-boot-starter-web'
+    implementation 'org.hibernate:hibernate-search-orm:5.11.5.Final'
+    implementation 'org.hibernate:hibernate-search-elasticsearch:5.11.5.Final'
+    implementation 'org.mapstruct:mapstruct:1.3.1.Final'
+
+    compileOnly 'org.projectlombok:lombok'
+    runtimeOnly 'com.h2database:h2'
+    annotationProcessor 'org.projectlombok:lombok'
+    annotationProcessor 'org.mapstruct:mapstruct-processor:1.3.1.Final'
+
+    testImplementation('org.springframework.boot:spring-boot-starter-test') {
+        exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
+    }
+}
+
+test {
+    useJUnitPlatform()
+}

spring-boot/hibernate-search/gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Mon Sep 07 12:46:19 IST 2020
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.4.1-all.zip
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+zipStorePath=wrapper/dists
+zipStoreBase=GRADLE_USER_HOME

spring-boot/hibernate-search/gradlew

@@ -0,0 +1,184 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ]; do
+  ls=$(ls -ld "$PRG")
+  link=$(expr "$ls" : '.*-> \(.*\)$')
+  if expr "$link" : '/.*' >/dev/null; then
+    PRG="$link"
+  else
+    PRG=$(dirname "$PRG")"/$link"
+  fi
+done
+SAVED="$(pwd)"
+cd "$(dirname \"$PRG\")/" >/dev/null
+APP_HOME="$(pwd -P)"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=$(basename "$0")
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn() {
+  echo "$*"
+}
+
+die() {
+  echo
+  echo "$*"
+  echo
+  exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$(uname)" in
+CYGWIN*)
+  cygwin=true
+  ;;
+Darwin*)
+  darwin=true
+  ;;
+MINGW*)
+  msys=true
+  ;;
+NONSTOP*)
+  nonstop=true
+  ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ]; then
+  if [ -x "$JAVA_HOME/jre/sh/java" ]; then
+    # IBM's JDK on AIX uses strange locations for the executables
+    JAVACMD="$JAVA_HOME/jre/sh/java"
+  else
+    JAVACMD="$JAVA_HOME/bin/java"
+  fi
+  if [ ! -x "$JAVACMD" ]; then
+    die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+  fi
+else
+  JAVACMD="java"
+  which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ]; then
+  MAX_FD_LIMIT=$(ulimit -H -n)
+  if [ $? -eq 0 ]; then
+    if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ]; then
+      MAX_FD="$MAX_FD_LIMIT"
+    fi
+    ulimit -n $MAX_FD
+    if [ $? -ne 0 ]; then
+      warn "Could not set maximum file descriptor limit: $MAX_FD"
+    fi
+  else
+    warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+  fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+  GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ]; then
+  APP_HOME=$(cygpath --path --mixed "$APP_HOME")
+  CLASSPATH=$(cygpath --path --mixed "$CLASSPATH")
+
+  JAVACMD=$(cygpath --unix "$JAVACMD")
+
+  # We build the pattern for arguments to be converted via cygpath
+  ROOTDIRSRAW=$(find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null)
+  SEP=""
+  for dir in $ROOTDIRSRAW; do
+    ROOTDIRS="$ROOTDIRS$SEP$dir"
+    SEP="|"
+  done
+  OURCYGPATTERN="(^($ROOTDIRS))"
+  # Add a user-defined pattern to the cygpath arguments
+  if [ "$GRADLE_CYGPATTERN" != "" ]; then
+    OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+  fi
+  # Now convert the arguments - kludge to limit ourselves to /bin/sh
+  i=0
+  for arg in "$@"; do
+    CHECK=$(echo "$arg" | egrep -c "$OURCYGPATTERN" -)
+    CHECK2=$(echo "$arg" | egrep -c "^-") ### Determine if an option
+
+    if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ]; then ### Added a condition
+      eval $(echo args$i)=$(cygpath --path --ignore --mixed "$arg")
+    else
+      eval $(echo args$i)="\"$arg\""
+    fi
+    i=$(expr $i + 1)
+  done
+  case $i in
+  0) set -- ;;
+  1) set -- "$args0" ;;
+  2) set -- "$args0" "$args1" ;;
+  3) set -- "$args0" "$args1" "$args2" ;;
+  4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+  5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+  6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+  7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+  8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+  9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+  esac
+fi
+
+# Escape application args
+save() {
+  for i; do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/"; done
+  echo " "
+}
+APP_ARGS=$(save "$@")
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

spring-boot/hibernate-search/gradlew.bat

@@ -0,0 +1,104 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto init
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto init
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:init
+@rem Get command-line arguments, handling Windows variants
+
+if not "%OS%" == "Windows_NT" goto win9xME_args
+
+:win9xME_args
+@rem Slurp the command line arguments.
+set CMD_LINE_ARGS=
+set _SKIP=2
+
+:win9xME_args_slurp
+if "x%~1" == "x" goto execute
+
+set CMD_LINE_ARGS=%*
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %CMD_LINE_ARGS%
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

spring-boot/hibernate-search/settings.gradle

@@ -0,0 +1 @@
+rootProject.name = 'hibernate-search'

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/HibernateSearchApplication.java

@@ -0,0 +1,15 @@
+package io.reflectoring.hibernatesearch;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class HibernateSearchApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(HibernateSearchApplication.class, args);
+    }
+
+
+
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/configuration/StartupEvent.java

@@ -0,0 +1,25 @@
+package io.reflectoring.hibernatesearch.configuration;
+
+import io.reflectoring.hibernatesearch.service.IndexingService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.boot.context.event.ApplicationReadyEvent;
+import org.springframework.context.ApplicationListener;
+import org.springframework.stereotype.Component;
+
+@Component
+@Slf4j
+@RequiredArgsConstructor
+public class StartupEvent implements ApplicationListener<ApplicationReadyEvent> {
+
+    private final IndexingService service;
+
+    @Override
+    public void onApplicationEvent(ApplicationReadyEvent event) {
+        try {
+            service.initiateIndexing();
+        } catch (InterruptedException e) {
+            log.error("Failed to reindex entities ",e);
+        }
+    }
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/controller/IndexController.java

@@ -0,0 +1,63 @@
+package io.reflectoring.hibernatesearch.controller;
+
+import io.reflectoring.hibernatesearch.controller.dto.PostResponse;
+import io.reflectoring.hibernatesearch.controller.dto.UserResponse;
+import io.reflectoring.hibernatesearch.controller.mapper.PostMapper;
+import io.reflectoring.hibernatesearch.controller.mapper.UserMapper;
+import io.reflectoring.hibernatesearch.service.IndexingService;
+import io.reflectoring.hibernatesearch.service.SearchService;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+@RestController
+@Slf4j
+@RequiredArgsConstructor
+class IndexController {
+    private final IndexingService indexingService;
+    private final SearchService searchService;
+    private final PostMapper postMapper;
+    private final UserMapper userMapper;
+
+    @PostMapping("/reindex")
+    public void reindex() throws InterruptedException {
+        indexingService.initiateIndexing();
+    }
+
+    @GetMapping("/user")
+    public List<UserResponse> getUser(@RequestParam String first,
+                                      @RequestParam Integer max,
+                                      @RequestParam Integer page){
+        return searchService.getUserByFirst(first, max, page)
+                .stream().map(userMapper::toResponse).collect(Collectors.toList());
+    }
+
+    @GetMapping("/user/projection")
+    public List<UserResponse> getProjectUser(@RequestParam String first,
+                                             @RequestParam Integer max,
+                                             @RequestParam Integer page){
+        return searchService.getUserByFirstWithProjection(first, max, page)
+                .stream().map(userMapper::toResponse).collect(Collectors.toList());
+    }
+
+    @GetMapping("/post")
+    public List<PostResponse> getPost(@RequestParam Long likeCount,
+                                      @RequestParam(required = false) String hashTags,
+                                      @RequestParam(required = false) String tag){
+        return searchService.getBasedOnLikeCountTags(likeCount, hashTags, tag)
+                .stream().map(postMapper::toResponse).collect(Collectors.toList());
+    }
+
+    @GetMapping("/post/word")
+    public List<PostResponse> getPostByWord(@RequestParam String word){
+        return searchService.getPostBasedOnWord(word)
+                .stream().map(postMapper::toResponse).collect(Collectors.toList());
+    }
+
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/controller/dto/PostResponse.java

@@ -0,0 +1,21 @@
+package io.reflectoring.hibernatesearch.controller.dto;
+
+import io.reflectoring.hibernatesearch.domain.Tag;
+import lombok.Getter;
+import lombok.Setter;
+
+import java.time.LocalDateTime;
+
+@Getter
+@Setter
+public class PostResponse {
+    private String id;
+    private String body;
+    private UserResponse user;
+    private Tag tag;
+    private String imageUrl;
+    private String imageDescription;
+    private String hashTags;
+    private long likeCount;
+    private LocalDateTime createdAt;
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/controller/dto/UserResponse.java

@@ -0,0 +1,14 @@
+package io.reflectoring.hibernatesearch.controller.dto;
+
+import lombok.Getter;
+import lombok.Setter;
+
+@Getter
+@Setter
+public class UserResponse {
+    private String id;
+    private String first;
+    private String middle;
+    private String last;
+    private Integer age;
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/controller/mapper/PostMapper.java

@@ -0,0 +1,10 @@
+package io.reflectoring.hibernatesearch.controller.mapper;
+
+import io.reflectoring.hibernatesearch.controller.dto.PostResponse;
+import io.reflectoring.hibernatesearch.domain.Post;
+import org.mapstruct.Mapper;
+
+@Mapper(componentModel = "spring", uses = UserMapper.class)
+public interface PostMapper {
+    PostResponse toResponse(Post post);
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/controller/mapper/UserMapper.java

@@ -0,0 +1,10 @@
+package io.reflectoring.hibernatesearch.controller.mapper;
+
+import io.reflectoring.hibernatesearch.controller.dto.UserResponse;
+import io.reflectoring.hibernatesearch.domain.User;
+import org.mapstruct.Mapper;
+
+@Mapper(componentModel = "spring")
+public interface UserMapper {
+    UserResponse toResponse(User user);
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/domain/Post.java

@@ -0,0 +1,47 @@
+package io.reflectoring.hibernatesearch.domain;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.apache.lucene.analysis.core.LowerCaseFilterFactory;
+import org.hibernate.search.annotations.*;
+
+import javax.persistence.*;
+import java.time.LocalDateTime;
+
+@Getter
+@Setter
+@Entity
+@Indexed(index = "idx_post")
+@NormalizerDef(name = "lower",
+    filters = @TokenFilterDef(factory = LowerCaseFilterFactory.class))
+public class Post {
+  @Id
+  private String id;
+
+  @Field(name = "body")
+  @Field(name = "bodyFiltered", analyzer = @Analyzer(definition = "stop"))
+  private String body;
+
+  @ManyToOne
+  @IndexedEmbedded
+  private User user;
+
+  @Field(normalizer = @Normalizer(definition = "lower"))
+  @Enumerated(EnumType.STRING)
+  private Tag tag;
+
+  private String imageUrl;
+
+  private String imageDescription;
+
+  @Field
+  private String hashTags;
+
+  @Field
+  @SortableField
+  private long likeCount;
+
+  @Field(analyze = Analyze.NO)
+  @SortableField
+  private LocalDateTime createdAt;
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/domain/Tag.java

@@ -0,0 +1,7 @@
+package io.reflectoring.hibernatesearch.domain;
+
+public enum Tag {
+    MOVIE,
+    MUSIC,
+    LITERATURE
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/domain/User.java

@@ -0,0 +1,37 @@
+package io.reflectoring.hibernatesearch.domain;
+
+import lombok.Getter;
+import lombok.Setter;
+import org.hibernate.search.annotations.*;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+import javax.persistence.OneToMany;
+import java.util.List;
+
+@Getter
+@Setter
+@Entity
+@Indexed(index = "idx_user")
+public class User {
+  @Id
+  private String id;
+
+  @Field(store = Store.YES)
+  @Field(name = "fullName")
+  private String first;
+
+  @Field(index = Index.NO, store = Store.YES)
+  private String middle;
+
+  @Field(store = Store.YES)
+  @Field(name = "fullName")
+  private String last;
+
+  @Field
+  private Integer age;
+
+  @ContainedIn
+  @OneToMany(mappedBy = "user")
+  private List<Post> post;
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/service/IndexingService.java

@@ -0,0 +1,26 @@
+package io.reflectoring.hibernatesearch.service;
+
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.hibernate.search.jpa.FullTextEntityManager;
+import org.hibernate.search.jpa.Search;
+import org.springframework.stereotype.Service;
+
+import javax.persistence.EntityManager;
+import javax.transaction.Transactional;
+
+@Service
+@RequiredArgsConstructor
+@Slf4j
+public class IndexingService {
+
+    private final EntityManager em;
+
+    @Transactional
+    public void initiateIndexing() throws InterruptedException {
+        log.info("Initiating indexing...");
+        FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(em);
+        fullTextEntityManager.createIndexer().startAndWait();
+        log.info("All entities indexed");
+    }
+}

spring-boot/hibernate-search/src/main/java/io/reflectoring/hibernatesearch/service/SearchService.java

@@ -0,0 +1,95 @@
+package io.reflectoring.hibernatesearch.service;
+
+import io.reflectoring.hibernatesearch.domain.Post;
+import io.reflectoring.hibernatesearch.domain.User;
+import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.lucene.search.Query;
+import org.hibernate.search.jpa.FullTextEntityManager;
+import org.hibernate.search.jpa.FullTextQuery;
+import org.hibernate.search.jpa.Search;
+import org.hibernate.search.query.dsl.QueryBuilder;
+import org.springframework.stereotype.Component;
+
+import javax.persistence.EntityManager;
+import java.util.ArrayList;
+import java.util.List;
+
+@Component
+@Slf4j
+@RequiredArgsConstructor
+public class SearchService {
+    private final EntityManager entityManager;
+
+    public List<Post> getBasedOnLikeCountTags(Long likeCount, String hashTags, String tag){
+        FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
+        QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder()
+                .forEntity(Post.class)
+                .get();
+        Query likeCountGreater = qb.range().onField("likeCount").above(likeCount).createQuery();
+        Query hashTagsQuery = qb.keyword().onField("hashTags").matching(hashTags).createQuery();
+        Query tagQuery = qb.keyword().onField("tag").matching(tag).createQuery();
+        Query finalQuery = qb.bool().must(likeCountGreater).should(tagQuery).should(hashTagsQuery).createQuery();
+
+        FullTextQuery fullTextQuery = fullTextEntityManager.createFullTextQuery(finalQuery, Post.class);
+        fullTextQuery.setSort(qb.sort().byScore().createSort());
+        return (List<Post>) fullTextQuery.getResultList();
+    }
+
+    public List<Post> getPostBasedOnWord(String word){
+        FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
+        QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder()
+                .forEntity(Post.class)
+                .get();
+        Query foodQuery = qb.keyword().onFields("bodyFiltered","hashTags").matching(word).createQuery();
+        FullTextQuery fullTextQuery = fullTextEntityManager.createFullTextQuery(foodQuery, Post.class);
+        return (List<Post>) fullTextQuery.getResultList();
+    }
+
+    public List<User> getUserByFirst(String first, int max, int page){
+        FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
+        QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder()
+                .forEntity(User.class)
+                .get();
+        Query similarToUser = qb.keyword().wildcard().onField("first")
+                .matching(first).createQuery();
+        Query finalQuery = qb.bool().must(similarToUser).createQuery();
+
+        FullTextQuery fullTextQuery = fullTextEntityManager.createFullTextQuery(finalQuery, User.class);
+        fullTextQuery.setSort(qb.sort().byField("age").desc().andByScore().createSort());
+        fullTextQuery.setMaxResults(max);
+        fullTextQuery.setFirstResult(page);
+        return (List<User>) fullTextQuery.getResultList();
+    }
+
+    public List<User> getUserByFirstWithProjection(String first, int max, int page){
+        FullTextEntityManager fullTextEntityManager = Search.getFullTextEntityManager(entityManager);
+        QueryBuilder qb = fullTextEntityManager.getSearchFactory().buildQueryBuilder()
+                .forEntity(User.class)
+                .get();
+        Query similarToUser = qb.keyword().fuzzy().withEditDistanceUpTo(2).onField("first")
+                .matching(first).createQuery();
+        Query finalQuery = qb.bool().must(similarToUser).createQuery();
+
+        FullTextQuery fullTextQuery = fullTextEntityManager.createFullTextQuery(finalQuery, User.class);
+        fullTextQuery.setProjection(FullTextQuery.ID, "first","last","middle","age");
+        fullTextQuery.setSort(qb.sort().byField("age").desc().andByScore().createSort());
+        fullTextQuery.setMaxResults(max);
+        fullTextQuery.setFirstResult(page);
+        return getUserList(fullTextQuery.getResultList());
+    }
+
+    private List<User> getUserList(List<Object[]> resultList) {
+        List<User> users = new ArrayList<>();
+        for (Object[] objects : resultList) {
+            User user = new User();
+            user.setId((String) objects[0]);
+            user.setFirst((String) objects[1]);
+            user.setLast((String) objects[2]);
+            user.setMiddle((String) objects[3]);
+            user.setAge((Integer) objects[4]);
+            users.add(user);
+        }
+        return users;
+    }
+}

spring-boot/hibernate-search/src/main/resources/application.yml

@@ -0,0 +1,15 @@
+spring:
+  jpa:
+    show-sql: true
+    generate-ddl: true
+    hibernate:
+      ddl-auto: create-drop
+    properties:
+      hibernate:
+        search:
+          default:
+            indexmanager: elasticsearch
+            elasticsearch:
+              host: http://192.168.0.103:9200
+              index_schema_management_strategy: drop-and-create
+              required_index_status: yellow

spring-boot/hibernate-search/src/main/resources/data.sql

@@ -0,0 +1,47 @@
+insert into user (id, first, last, middle, age) values ( 'c_1', 'John', 'Doe', 'Maven' , 31);
+insert into user (id, first, last, middle, age) values ( 'c_2', 'Jane', 'Dove', 'Gradle', 41);
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_1', 'The tattered work gloves speak of the many hours of hard labor he endured throughout his life', now(),
+        '#work#labour', 'Office', 'uri://sample1', 20, 'LITERATURE', 'c_1' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_2', 'Dolores wouldn''t have eaten the meal if she had known what it actually was.', now(),
+         '#food', 'Office', 'uri://sample1', 7686, 'MUSIC', 'c_1' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_3', 'It caught him off guard that space smelled of seared steak.', now(),
+         '#food#stale#caughtinact', 'Office', 'uri://sample1', 1234, 'LITERATURE', 'c_1' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_4', '25 years later, she still regretted that specific moment.', now(),
+         '#ages', 'Office', 'uri://sample1', 679, 'MOVIE', 'c_1' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_5', 'She had a habit of taking showers in lemonade.', now(),
+         '#bath', 'Office', 'uri://sample1', 23, 'LITERATURE', 'c_1' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_6', 'She is never happy until she finds something to be unhappy about; then, she is overjoyed.', now(),
+         '#feelings', 'Office', 'uri://sample1', 4569877, 'MOVIE', 'c_2' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_7', 'They throw cabbage that turns your brain into emotional baggage.', now(),
+         '#food', 'Office', 'uri://sample1', 1000, 'MUSIC', 'c_2' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_8', 'There''s a message for you if you look up.', now(),
+         '#message', 'Office', 'uri://sample1', 20, 'LITERATURE', 'c_2' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_9', 'Please wait outside of the house.', now(),
+         '#house#labour', 'Office', 'uri://sample1', 40, 'MUSIC', 'c_2' );
+
+insert into post (id, body, created_at, hash_tags, image_description, image_url, like_count, tag, user_id)
+values ( 'p_10', 'Honestly, I didn''t care much for the first season, so I didn''t bother with the second.', now(),
+         '#honest#season#time', 'Office', 'uri://sample1', 20000, 'MOVIE', 'c_2' );
+
+
+
+
+

spring-boot/mocking/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Mocking with (and without) Spring Boot](https://reflectoring.io/spring-boot-mock/)

spring-boot/modular/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Modularizing a Spring Boot Application](https://reflectoring.io/spring-boot-modules/)

spring-boot/paging/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Paging with Spring Boot](https://reflectoring.io/spring-boot-paging/)

spring-boot/password-encoding/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Handling Passwords with Spring Boot and Spring Security](https://reflectoring.io/spring-security-password-handling/)

spring-boot/spring-boot-docker/.mvn/wrapper/MavenWrapperDownloader.java

@@ -0,0 +1,117 @@
+/*
+ * Copyright 2007-present the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+import java.net.*;
+import java.io.*;
+import java.nio.channels.*;
+import java.util.Properties;
+
+public class MavenWrapperDownloader {
+
+    private static final String WRAPPER_VERSION = "0.5.6";
+    /**
+     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
+     */
+    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
+        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
+
+    /**
+     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
+     * use instead of the default one.
+     */
+    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
+            ".mvn/wrapper/maven-wrapper.properties";
+
+    /**
+     * Path where the maven-wrapper.jar will be saved to.
+     */
+    private static final String MAVEN_WRAPPER_JAR_PATH =
+            ".mvn/wrapper/maven-wrapper.jar";
+
+    /**
+     * Name of the property which should be used to override the default download url for the wrapper.
+     */
+    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
+
+    public static void main(String args[]) {
+        System.out.println("- Downloader started");
+        File baseDirectory = new File(args[0]);
+        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
+
+        // If the maven-wrapper.properties exists, read it and check if it contains a custom
+        // wrapperUrl parameter.
+        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
+        String url = DEFAULT_DOWNLOAD_URL;
+        if(mavenWrapperPropertyFile.exists()) {
+            FileInputStream mavenWrapperPropertyFileInputStream = null;
+            try {
+                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
+                Properties mavenWrapperProperties = new Properties();
+                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
+                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
+            } catch (IOException e) {
+                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
+            } finally {
+                try {
+                    if(mavenWrapperPropertyFileInputStream != null) {
+                        mavenWrapperPropertyFileInputStream.close();
+                    }
+                } catch (IOException e) {
+                    // Ignore ...
+                }
+            }
+        }
+        System.out.println("- Downloading from: " + url);
+
+        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
+        if(!outputFile.getParentFile().exists()) {
+            if(!outputFile.getParentFile().mkdirs()) {
+                System.out.println(
+                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
+            }
+        }
+        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
+        try {
+            downloadFileFromURL(url, outputFile);
+            System.out.println("Done");
+            System.exit(0);
+        } catch (Throwable e) {
+            System.out.println("- Error downloading");
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+
+    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
+        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
+            String username = System.getenv("MVNW_USERNAME");
+            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
+            Authenticator.setDefault(new Authenticator() {
+                @Override
+                protected PasswordAuthentication getPasswordAuthentication() {
+                    return new PasswordAuthentication(username, password);
+                }
+            });
+        }
+        URL website = new URL(urlString);
+        ReadableByteChannel rbc;
+        rbc = Channels.newChannel(website.openStream());
+        FileOutputStream fos = new FileOutputStream(destination);
+        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
+        fos.close();
+        rbc.close();
+    }
+
+}

spring-boot/spring-boot-docker/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

spring-boot/spring-boot-docker/Dockerfile

@@ -0,0 +1,5 @@
+FROM adoptopenjdk/openjdk11:alpine-jre
+ARG JAR_FILE=target/*.jar
+COPY ${JAR_FILE} application.jar
+EXPOSE 8080
+ENTRYPOINT ["java","-jar","/application.jar"]