replaced integers with more meaningful Strings

Spring-scheduler

aws/springcloudwatch/.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();
+    }
+
+}

aws/springcloudwatch/.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

aws/springcloudwatch/README.md

@@ -0,0 +1,9 @@
+# Publishing Metrics from Spring Boot Application to Amazon CloudWatch
+
+Example code for using Spring Boot Application with Amazon CloudWatch
+
+## Blog posts
+
+Blog posts about this topic:
+
+* [Publishing Metrics from Spring Boot Application to Amazon CloudWatch](https://reflectoring.io/spring-aws-cloudwatch/)

aws/springcloudwatch/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} $MAVEN_CONFIG "$@"

aws/springcloudwatch/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%

aws/springcloudwatch/pom.xml

@@ -0,0 +1,90 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.3</version>
+		<relativePath /> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>io.pratik</groupId>
+	<artifactId>metricscapture</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>metricscapture</name>
+	<description>Demo project for capturing cloudwatch metrics in Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>io.micrometer</groupId>
+			<artifactId>micrometer-core</artifactId>
+		</dependency>
+
+		<!--  <dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>-->
+		<dependency> 
+		    <groupId>io.micrometer</groupId> 
+		    <artifactId>micrometer-registry-cloudwatch2</artifactId> 
+		</dependency> 
+	<!--  	<dependency>
+			<groupId>software.amazon.awssdk</groupId>
+			<artifactId>cloudwatch</artifactId>
+		</dependency>-->
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>io.awspring.cloud</groupId>
+				<artifactId>spring-cloud-aws-dependencies</artifactId>
+				<version>2.3.0</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+			<dependency>
+				<groupId>software.amazon.awssdk</groupId>
+				<artifactId>bom</artifactId>
+				<version>2.17.14</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+				<configuration>
+					<excludes>
+						<exclude>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+						</exclude>
+					</excludes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/AppConfig.java

@@ -0,0 +1,62 @@
+/**
+ * 
+ */
+package io.pratik.metricscapture;
+
+import java.time.Duration;
+import java.util.Map;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+import io.micrometer.cloudwatch2.CloudWatchConfig;
+import io.micrometer.cloudwatch2.CloudWatchMeterRegistry;
+import io.micrometer.core.instrument.Clock;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.Metrics;
+import software.amazon.awssdk.auth.credentials.ProfileCredentialsProvider;
+import software.amazon.awssdk.regions.Region;
+import software.amazon.awssdk.services.cloudwatch.CloudWatchAsyncClient;
+
+/**
+ * @author pratikdas
+ *
+ */
+@Configuration
+public class AppConfig {
+	
+
+
+	@Bean
+	public CloudWatchAsyncClient cloudWatchAsyncClient() {
+		return CloudWatchAsyncClient.builder().region(Region.US_EAST_1)
+				.credentialsProvider(ProfileCredentialsProvider.create("pratikpoc")).build();
+	}
+	
+	@Bean
+	public MeterRegistry getMeterRegistry() {
+		CloudWatchConfig cloudWatchConfig = setupCloudWatchConfig();
+		
+		MeterRegistry meterRegistry = new CloudWatchMeterRegistry(cloudWatchConfig, Clock.SYSTEM,
+				cloudWatchAsyncClient());
+				
+		return meterRegistry;
+	}
+
+	private CloudWatchConfig setupCloudWatchConfig() {
+		CloudWatchConfig cloudWatchConfig = new CloudWatchConfig() {
+			
+			private Map<String, String> configuration
+	          = Map.of("cloudwatch.namespace", "productsApp",
+	                   "cloudwatch.step", Duration.ofMinutes(1).toString());
+			
+			@Override
+			public String get(String key) {
+				return configuration.get(key);
+			}
+		};
+		return cloudWatchConfig;
+	}
+
+}

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/MetricPublisher.java

@@ -0,0 +1,87 @@
+/**
+ * 
+ */
+package io.pratik.metricscapture;
+
+import java.time.Instant;
+import java.time.ZoneOffset;
+import java.time.ZonedDateTime;
+import java.time.format.DateTimeFormatter;
+import java.util.List;
+import java.util.stream.Collectors;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import io.pratik.metricscapture.models.MetricTag;
+import software.amazon.awssdk.services.cloudwatch.CloudWatchAsyncClient;
+import software.amazon.awssdk.services.cloudwatch.model.CloudWatchException;
+import software.amazon.awssdk.services.cloudwatch.model.Dimension;
+import software.amazon.awssdk.services.cloudwatch.model.MetricDatum;
+import software.amazon.awssdk.services.cloudwatch.model.PutMetricDataRequest;
+import software.amazon.awssdk.services.cloudwatch.model.StandardUnit;
+
+/**
+ * @author pratikdas
+ *
+ */
+@Service
+public class MetricPublisher {
+	
+	private CloudWatchAsyncClient cloudWatchAsyncClient;
+	
+	
+    @Autowired
+	public MetricPublisher(CloudWatchAsyncClient cloudWatchAsyncClient) {
+		super();
+		this.cloudWatchAsyncClient = cloudWatchAsyncClient;
+	}
+
+
+
+    public void putMetricData(final String nameSpace, 
+            final String metricName, 
+            final Double dataPoint,
+            final List<MetricTag> metricTags) {
+
+		try {
+			
+			List<Dimension> dimensions = metricTags
+					.stream()
+					.map((metricTag)->{
+				         return Dimension
+					         .builder()
+					         .name(metricTag.getName())
+					         .value(metricTag.getValue())
+					         .build();
+			}).collect(Collectors.toList());			
+			
+			// Set an Instant object
+			String time = ZonedDateTime
+			           .now(ZoneOffset.UTC)
+			           .format(DateTimeFormatter.ISO_INSTANT);
+			Instant instant = Instant.parse(time);
+			
+			MetricDatum datum = MetricDatum
+			         .builder()
+			         .metricName(metricName)
+			         .unit(StandardUnit.NONE)
+			         .value(dataPoint)
+			         .timestamp(instant)
+			         .dimensions(dimensions)
+			         .build();
+			
+			PutMetricDataRequest request = 
+			           PutMetricDataRequest
+			           .builder()
+			           .namespace(nameSpace)
+			           .metricData(datum)
+			           .build();
+			
+			cloudWatchAsyncClient.putMetricData(request);
+		
+		} catch (CloudWatchException e) {
+		   System.err.println(e.awsErrorDetails().errorMessage());
+		}
+	}
+}

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/MetricscaptureApplication.java

@@ -0,0 +1,27 @@
+package io.pratik.metricscapture;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.web.client.RestTemplateBuilder;
+import org.springframework.context.annotation.Bean;
+import org.springframework.http.converter.StringHttpMessageConverter;
+import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;
+import org.springframework.scheduling.annotation.EnableScheduling;
+import org.springframework.web.client.RestTemplate;
+
+@SpringBootApplication
+@EnableScheduling
+public class MetricscaptureApplication {
+	
+	@Bean
+    RestTemplate restTemplate(RestTemplateBuilder builder) {
+		return builder
+				.messageConverters(new StringHttpMessageConverter(), new MappingJackson2HttpMessageConverter())
+				.build();
+	}
+
+	public static void main(String[] args) {
+		SpringApplication.run(MetricscaptureApplication.class, args);
+	}
+
+}

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/PricingEngine.java

@@ -0,0 +1,34 @@
+/**
+ * 
+ */
+package io.pratik.metricscapture;
+
+import java.util.Random;
+
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+
+/**
+ * @author pratikdas
+ *
+ */
+@Service
+public class PricingEngine {
+	
+	private Double price;
+	
+	public Double getProductPrice() {
+		return price;
+		
+	}
+	
+	@Scheduled(fixedRate = 70000)
+	public void computePrice() {
+		
+		Random random = new Random();
+		price = random.nextDouble() * 100;
+		System.out.println("computing price "+price);
+		
+	}
+
+}

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/ProductController.java

@@ -0,0 +1,89 @@
+/**
+ * 
+ */
+package io.pratik.metricscapture;
+
+import java.time.Duration;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
+
+import io.micrometer.core.instrument.Counter;
+import io.micrometer.core.instrument.Gauge;
+import io.micrometer.core.instrument.MeterRegistry;
+import io.micrometer.core.instrument.Timer;
+import io.pratik.metricscapture.models.Order;
+import io.pratik.metricscapture.models.Product;
+import lombok.extern.slf4j.Slf4j;
+
+/**
+ * @author pratikdas
+ *
+ */
+@RestController
+@Slf4j
+public class ProductController {
+	private Counter pageViewsCounter;
+	private Timer productTimer;
+	private Gauge priceGauge;
+	
+	private MeterRegistry meterRegistry;
+	
+	private PricingEngine pricingEngine;
+
+	@Autowired
+	ProductController(MeterRegistry meterRegistry, PricingEngine pricingEngine){
+		
+		 this.meterRegistry = meterRegistry;
+		 this.pricingEngine = pricingEngine;
+				 
+		 priceGauge = Gauge
+				    .builder("product.price", pricingEngine , 
+							 (pe)->{return pe != null? pe.getProductPrice() : null;})
+				    .description("Product price")
+				    .baseUnit("ms")
+				    .register(meterRegistry);
+			
+		 pageViewsCounter = meterRegistry
+				 .counter("PAGE_VIEWS.ProductList");
+		 
+		 productTimer = meterRegistry
+				 .timer("execution.time.fetchProducts");
+	
+	}
+	
+	
+	
+	
+	@GetMapping("/products")
+	@ResponseBody
+	public List<Product> fetchProducts() {
+		long startTime = System.currentTimeMillis();
+		
+		List<Product> products = fetchProductsFromStore();
+		
+		// increment page views counter
+		pageViewsCounter.increment();
+
+		// record time to execute the method
+		System.out.println("productTimer "+productTimer + " " + pageViewsCounter + " " + priceGauge);
+	    productTimer.record(Duration.ofMillis(System.currentTimeMillis() - startTime));
+	    	
+		return products;
+	}
+	
+	private List<Product> fetchProductsFromStore(){
+		List<Product> products = new ArrayList<Product>();
+		products.add(Product.builder().name("Television").build());
+		products.add(Product.builder().name("Book").build());
+		return products;
+	}
+	
+
+
+}

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/models/MetricTag.java

@@ -0,0 +1,25 @@
+/**
+ * 
+ */
+package io.pratik.metricscapture.models;
+
+/**
+ * @author pratikdas
+ *
+ */
+public class MetricTag {
+	private String name;
+	private String value;
+	public MetricTag(String name, String value) {
+		super();
+		this.name = name;
+		this.value = value;
+	}
+	public String getName() {
+		return name;
+	}
+	public String getValue() {
+		return value;
+	}
+	
+}

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/models/Order.java

@@ -0,0 +1,21 @@
+/**
+ * 
+ */
+package io.pratik.metricscapture.models;
+
+import java.util.List;
+
+import lombok.Builder;
+
+/**
+ * @author pratikdas
+ *
+ */
+@Builder
+public class Order {
+	private List<Product> products;
+	
+	private String orderDate;
+	
+
+}

aws/springcloudwatch/src/main/java/io/pratik/metricscapture/models/Product.java

@@ -0,0 +1,19 @@
+/**
+ * 
+ */
+package io.pratik.metricscapture.models;
+
+import lombok.Builder;
+import lombok.Data;
+
+/**
+ * @author pratikdas
+ *
+ */
+@Builder
+@Data
+public class Product {
+	private String name;
+	private Double price;
+
+}

aws/springcloudwatch/src/main/resources/application.properties

@@ -0,0 +1,8 @@
+cloud.aws.credentials.profile-name=pratikpoc
+cloud.aws.region.auto=false
+cloud.aws.region.static=us-east-1
+
+logging.level.io.micrometer=DEBUG
+
+
+

aws/springcloudwatch/src/test/java/io/pratik/metricscapture/MetricscaptureApplicationTests.java

@@ -0,0 +1,13 @@
+package io.pratik.metricscapture;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class MetricscaptureApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

build-all.sh

@@ -86,12 +86,15 @@ if [[ "$MODULE" == "module6" ]]
 then
   # ADD NEW MODULES HERE
   # (add new modules above the rest so you get quicker feedback if it fails)
+  build maven_module "spring-boot/spring-boot-scheduler"
+  build maven_module "aws/springcloudwatch"
+  build maven_module "aws/springcloudses"
+  build maven_module "spring-boot/spring-boot-camel"
+  build_maven_module "logging/structured-logging"
   build_maven_module "spring-boot/zero-downtime"
   build_maven_module "resilience4j/springboot-resilience4j"
   build_maven_module "spring-boot/feature-flags"
-  build_maven_module  "aws/springcloudses"
   build_gradle_module "aws/spring-cloud-caching-redis"
-  build_maven_module "spring-boot/spring-boot-camel"
   build_maven_module "logging/spring-boot"
   build_maven_module "logging/logback"
   build_maven_module "logging/log4j"

logging/structured-logging/.gitignore

@@ -0,0 +1,33 @@
+HELP.md
+target/
+!.mvn/wrapper/maven-wrapper.jar
+!**/src/main/**/target/
+!**/src/test/**/target/
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+build/
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### VS Code ###
+.vscode/

logging/structured-logging/.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
+ *
+ *      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.
+ */
+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();
+    }
+
+}

logging/structured-logging/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1,2 @@
+distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.1/apache-maven-3.8.1-bin.zip
+wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar

logging/structured-logging/README.md

@@ -0,0 +1,3 @@
+1. Start the app with `./mvn spring-boot:run`.
+2. Go to `http://localhost:8080/hello`.
+3. Log in as `user` with the password that is printed in the log output of the app.

logging/structured-logging/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
+#
+#    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.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# 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} $MAVEN_CONFIG "$@"

logging/structured-logging/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    https://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%

logging/structured-logging/pom.xml

@@ -0,0 +1,71 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.3</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>io.reflectoring</groupId>
+	<artifactId>structured-logging</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>structured-logging</name>
+	<description>Demo project for Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.cloud</groupId>
+				<artifactId>spring-cloud-dependencies</artifactId>
+				<version>2020.0.3</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-security</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.cloud</groupId>
+			<artifactId>spring-cloud-starter-sleuth</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>io.logz.logback</groupId>
+			<artifactId>logzio-logback-appender</artifactId>
+			<version>1.0.24</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

logging/structured-logging/src/main/java/io/reflectoring/CombobulatorException.java

@@ -0,0 +1,5 @@
+package io.reflectoring;
+
+public class CombobulatorException extends RuntimeException {
+
+}

logging/structured-logging/src/main/java/io/reflectoring/FluxCompensatorException.java

@@ -0,0 +1,5 @@
+package io.reflectoring;
+
+public class FluxCompensatorException extends RuntimeException {
+
+}

logging/structured-logging/src/main/java/io/reflectoring/MaintenanceWindowException.java

@@ -0,0 +1,5 @@
+package io.reflectoring;
+
+public class MaintenanceWindowException extends RuntimeException {
+
+}

logging/structured-logging/src/main/java/io/reflectoring/ThingyException.java

@@ -0,0 +1,5 @@
+package io.reflectoring;
+
+public class ThingyException extends RuntimeException {
+
+}

logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/DomainService.java

@@ -0,0 +1,36 @@
+package io.reflectoring.structuredlogging;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.stereotype.Component;
+
+import java.time.Duration;
+import java.time.Instant;
+
+@Component
+public class DomainService {
+
+    private static final Logger logger = LoggerFactory.getLogger(DomainService.class);
+
+    String hello(){
+        logger.info("log event from the domain service");
+        return "hello";
+    }
+
+    String callThirdPartyService() throws InterruptedException {
+        logger.info("log event from the domain service");
+        Instant start = Instant.now();
+
+        Thread.sleep(2000); // simulating an expensive operation
+
+        Duration duration = Duration.between(start, Instant.now());
+
+        MDC.put("thirdPartyCallDuration", String.valueOf(duration.getNano()));
+        logger.info("call to third party service successful!");
+        MDC.remove("thirdPartyCallDuration");
+
+        return "hello";
+    }
+
+}

logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/LoggingInterceptor.java

@@ -0,0 +1,42 @@
+package io.reflectoring.structuredlogging;
+
+import org.slf4j.MDC;
+import org.springframework.security.core.context.SecurityContextHolder;
+import org.springframework.security.core.userdetails.UserDetails;
+import org.springframework.web.servlet.HandlerInterceptor;
+import org.springframework.web.servlet.ModelAndView;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+public class LoggingInterceptor implements HandlerInterceptor {
+
+    @Override
+    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
+
+        Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
+
+        if (principal instanceof UserDetails) {
+            String username = ((UserDetails)principal).getUsername();
+            MDC.put("username", username);
+        } else {
+            String username = principal.toString();
+            MDC.put("username", username);
+        }
+
+
+        if (request.getHeader("X-CUSTOM-HEADER") != null) {
+            MDC.put("codePath", "3rdParty");
+        } else {
+            MDC.put("codePath", "user");
+        }
+
+        return true;
+    }
+
+    @Override
+    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
+        MDC.remove("username");
+        MDC.remove("codePath");
+    }
+}

logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/StructuredLoggingApplication.java

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

logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/Timer.java

@@ -0,0 +1,28 @@
+package io.reflectoring.structuredlogging;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+@Component
+public class Timer {
+
+    private final DomainService domainService;
+
+    private static final Logger logger = LoggerFactory.getLogger(Timer.class);
+
+    public Timer(DomainService domainService) {
+        this.domainService = domainService;
+    }
+
+    @Scheduled(fixedDelay = 5000)
+    void scheduledHello() {
+        MDC.put("codePath", "timer");
+        logger.info("log event from timer");
+        domainService.hello();
+        MDC.remove("codePath");
+    }
+
+}

logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebConfigurer.java

@@ -0,0 +1,14 @@
+package io.reflectoring.structuredlogging;
+
+import org.springframework.stereotype.Component;
+import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
+import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
+
+@Component
+public class WebConfigurer implements WebMvcConfigurer {
+
+    @Override
+    public void addInterceptors(InterceptorRegistry registry) {
+        registry.addInterceptor(new LoggingInterceptor());
+    }
+}

logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebController.java

@@ -0,0 +1,57 @@
+package io.reflectoring.structuredlogging;
+
+import io.reflectoring.CombobulatorException;
+import io.reflectoring.FluxCompensatorException;
+import io.reflectoring.MaintenanceWindowException;
+import io.reflectoring.ThingyException;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.util.Random;
+
+
+@RestController
+public class WebController {
+
+    private final DomainService domainService;
+
+    private static final Logger logger = LoggerFactory.getLogger(WebController.class);
+
+    private final Random random = new Random();
+
+    public WebController(DomainService domainService) {
+        this.domainService = domainService;
+    }
+
+    @GetMapping("/hello")
+    String helloWorld() {
+        logger.info("log event from the web controller");
+        return domainService.hello();
+    }
+
+    @GetMapping("/thirdparty")
+    String thirdparty() throws InterruptedException {
+        logger.info("log event from the web controller");
+        return domainService.callThirdPartyService();
+    }
+
+    @GetMapping("/exception")
+    String error() {
+        logger.info("log event from the web controller");
+
+        int r = random.nextInt(101);
+
+        if (r <= 10) {
+            throw new CombobulatorException();
+        } else if (r <= 30) {
+            throw new FluxCompensatorException();
+        } else if (r <= 80) {
+            throw new ThingyException();
+        } else {
+            throw new MaintenanceWindowException();
+        }
+    }
+
+}

logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebExceptionHandler.java

@@ -0,0 +1,32 @@
+package io.reflectoring.structuredlogging;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.slf4j.MDC;
+import org.springframework.http.HttpStatus;
+import org.springframework.web.bind.annotation.ControllerAdvice;
+import org.springframework.web.bind.annotation.ExceptionHandler;
+import org.springframework.web.bind.annotation.ResponseStatus;
+
+@ControllerAdvice
+public class WebExceptionHandler {
+
+    private static final Logger logger = LoggerFactory.getLogger(WebExceptionHandler.class);
+
+    @ExceptionHandler(Exception.class)
+    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
+    public void internalServerError(Exception e){
+        MDC.put("rootCause", getRootCause(e).getClass().getName());
+        logger.error("returning 500 (internal server error).", e);
+        MDC.remove("rootCause");
+    }
+
+    private Throwable getRootCause(Exception e){
+        Throwable rootCause = e;
+        while(e.getCause() != null && rootCause.getCause() != rootCause){
+            rootCause = e.getCause();
+        }
+        return rootCause;
+    }
+
+}

logging/structured-logging/src/main/resources/application.properties

@@ -0,0 +1 @@
+

logging/structured-logging/src/main/resources/logback.xml

@@ -0,0 +1,23 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <layout class="ch.qos.logback.classic.PatternLayout">
+            <Pattern>
+                %cyan(%d{ISO8601}) %highlight(%-5level) [%blue(%-30t)] [%blue(%X{codePath})] [%blue(%X{rootCause})] [%X{traceId:-},%X{spanId:-}] [%X{thirdPartyCallDuration}] %yellow(%C{1.}): %msg%n%throwable
+            </Pattern>
+        </layout>
+    </appender>
+
+    <appender name="LOGZIO" class="io.logz.logback.LogzioLogbackAppender">
+        <token>${LOGZIO_TOKEN}</token>
+        <logzioUrl>https://listener.logz.io:8071</logzioUrl>
+        <logzioType>structured-logging-application</logzioType>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="CONSOLE"/>
+        <appender-ref ref="LOGZIO"/>
+    </root>
+
+</configuration>

logging/structured-logging/src/test/java/io/reflectoring/structuredlogging/StructuredLoggingApplicationTests.java

@@ -0,0 +1,13 @@
+package io.reflectoring.structuredlogging;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class StructuredLoggingApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}

resilience4j/springboot-resilience4j/README.md

@@ -5,3 +5,4 @@ Run the SpringbootResilience4jApplication program
 ## Blog posts
 
 * [Implementing Retry with Spring_Boot_Resilience4j](https://reflectoring.io/retry-with-springboot-resilience4j/)
+* [Implementing Rate Limiting with Spring_Boot_Resilience4j](https://reflectoring.io/rate-limiting-with-springboot-resilience4j/)

resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/RateLimiterExamplesRunner.java

@@ -0,0 +1,131 @@
+package io.reflectoring.resilience4j.springboot;
+
+import io.reflectoring.resilience4j.springboot.model.SearchRequest;
+import java.time.Duration;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+
+@Component
+public class RateLimiterExamplesRunner {
+
+  @Autowired
+  private RateLimitingService service;
+
+  public static void main(String[] args) {
+    RateLimiterExamplesRunner runner = new RateLimiterExamplesRunner();
+    runner.run();
+  }
+
+  public void run() {
+    System.out.println("Running ratelimiter examples");
+
+    System.out.println("----------------------------- basicExample ------------------------------------------");
+    basicExample();
+    System.out.println("-----------------------------------------------------------------------");
+
+    System.out.println("----------------------------- timeoutExample ------------------------------------------");
+    timeoutExample();
+    System.out.println("-----------------------------------------------------------------------");
+
+    System.out.println("------------------------------ multipleLimits_2rps_40rpm_sequential -----------------------------------------");
+    multipleLimits_2rps_40rpm_sequential();
+    System.out.println("-----------------------------------------------------------------------");
+
+    System.out.println("------------------------------- changeLimitsExample ----------------------------------------");
+    changeLimitsExample();
+    System.out.println("-----------------------------------------------------------------------");
+
+    System.out.println("------------------------------- retryAndRateLimit ----------------------------------------");
+    retryAndRateLimit();
+    System.out.println("-----------------------------------------------------------------------");
+
+   System.out.println("------------------------------ rateLimiterEvents -----------------------------------------");
+   rateLimiterEvents();
+   System.out.println("-----------------------------------------------------------------------");
+
+    System.out.println("----------------------------- fallbackExample ------------------------------------------");
+    fallbackExample();
+    System.out.println("-----------------------------------------------------------------------");
+  }
+
+  private void rateLimiterEvents() {
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/15/2021");
+
+    try {
+      System.out.println(service.rateLimiterEventsExample(request));
+      System.out.println(service.rateLimiterEventsExample(request));
+    }
+    catch (Exception e) {
+      System.out.println(e.getMessage());
+    }
+  }
+
+  private void retryAndRateLimit() {
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/15/2021");
+
+    System.out.println(service.retryAndRateLimit(request));
+    System.out.println(service.retryAndRateLimit(request));
+  }
+
+  private void changeLimitsExample() {
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/15/2021");
+
+    for (int i=0; i<6; i++) {
+      System.out.println(service.changeLimitsExample(request));
+    }
+
+    try {
+      Thread.sleep(2000);
+    } catch (InterruptedException e) {
+      e.printStackTrace();
+    }
+
+    service.updateRateLimits("changeLimitsExample", 2, Duration.ofSeconds(2));
+    System.out.println("Rate limits changed");
+
+    for (int i=0; i<6; i++) {
+      System.out.println(service.changeLimitsExample(request));
+    }
+  }
+
+  private void multipleLimits_2rps_40rpm_sequential() {
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/15/2021");
+    for (int i=0; i<45; i++) {
+      try {
+        System.out.println(service.multipleRateLimitsExample(request));
+      }
+      catch (Exception e) {
+        e.printStackTrace();
+      }
+    }
+  }
+
+  private void timeoutExample() {
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/15/2021");
+    try {
+      for (int i=0; i<3; i++) {
+        System.out.println(service.timeoutExample(request));
+      }
+    }
+    catch (Exception e) {
+      e.printStackTrace();
+    }
+  }
+
+  private void basicExample() {
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/15/2021");
+    for (int i=0; i<4; i++) {
+      try {
+        System.out.println(service.basicExample(request));
+      } catch (Exception e) {
+        e.printStackTrace();
+      }
+    }
+  }
+
+  private void fallbackExample() {
+    SearchRequest request = new SearchRequest("NYC", "LAX", "08/15/2021");
+    System.out.println(service.fallbackExample(request));
+    System.out.println(service.fallbackExample(request));
+  }
+}

resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/RateLimitingService.java

@@ -0,0 +1,128 @@
+package io.reflectoring.resilience4j.springboot;
+
+import io.github.resilience4j.ratelimiter.RateLimiterRegistry;
+import io.github.resilience4j.ratelimiter.RequestNotPermitted;
+import io.github.resilience4j.ratelimiter.annotation.RateLimiter;
+import io.github.resilience4j.retry.RetryRegistry;
+import io.github.resilience4j.retry.annotation.Retry;
+import io.reflectoring.resilience4j.springboot.model.Flight;
+import io.reflectoring.resilience4j.springboot.model.SearchRequest;
+import io.reflectoring.resilience4j.springboot.services.FlightSearchService;
+import java.time.Duration;
+import java.time.format.DateTimeFormatter;
+import java.util.Arrays;
+import java.util.List;
+import javax.annotation.PostConstruct;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Component;
+import org.springframework.stereotype.Service;
+
+@Service
+public class RateLimitingService {
+  @Autowired
+  private FlightSearchService remoteSearchService;
+
+  @Autowired
+  private RPMRateLimitedFlightSearchSearch rpmRateLimitedFlightSearchSearch;
+
+  @Autowired
+  private RateLimiterRegistry registry;
+
+  @Autowired
+  private RetryRegistry retryRegistry;
+
+  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS");
+
+  @RateLimiter(name = "basicExample")
+  List<Flight> basicExample(SearchRequest request) {
+    return remoteSearchService.searchFlights(request);
+  }
+
+  @RateLimiter(name = "timeoutExample")
+  List<Flight> timeoutExample(SearchRequest request) {
+    return remoteSearchService.searchFlights(request);
+  }
+
+  @RateLimiter(name = "multipleRateLimiters_rps_limiter")
+  List<Flight> multipleRateLimitsExample(SearchRequest request) {
+    return rpmRateLimitedFlightSearchSearch.searchFlights(request, remoteSearchService);
+  }
+
+// doesn't work - @RateLimiter is not a repeatable annotation
+//  @RateLimiter(name = "multipleRateLimiters_rps_limiter")
+//  @RateLimiter(name = "multipleRateLimiters_rpm_limiter")
+//  List<Flight> multipleRateLimitsExample(SearchRequest request) {
+//    return remoteSearchService.searchFlights(request, remoteSearchService);
+//  }
+
+// doesn't work - calls within a Spring bean don't go thru the Spring proxy
+//  @RateLimiter(name = "multipleRateLimiters_rps_limiter")
+//  List<Flight> rpsLimitedSearch(SearchRequest request) {
+//    return rpmLimitedSearch(request, remoteSearchService);
+//  }
+
+//  @RateLimiter(name = "multipleRateLimiters_rpm_limiter")
+//  List<Flight> rpmLimitedSearch(SearchRequest request) {
+//    return remoteSearchService.searchFlights(request, remoteSearchService);
+//  }
+
+
+  @RateLimiter(name = "changeLimitsExample")
+  public List<Flight> changeLimitsExample(SearchRequest request) {
+    return remoteSearchService.searchFlights(request);
+  }
+
+  @Retry(name = "retryAndRateLimitExample")
+  @RateLimiter(name = "retryAndRateLimitExample")
+  public List<Flight> retryAndRateLimit(SearchRequest request) {
+    return remoteSearchService.searchFlights(request);
+  }
+
+  @RateLimiter(name = "rateLimiterEventsExample")
+  public List<Flight> rateLimiterEventsExample(SearchRequest request) {
+    return remoteSearchService.searchFlights(request);
+  }
+
+  public void updateRateLimits(String rateLimiterName, int newLimitForPeriod, Duration newTimeoutDuration) {
+    io.github.resilience4j.ratelimiter.RateLimiter limiter = registry.rateLimiter(rateLimiterName);
+    limiter.changeLimitForPeriod(newLimitForPeriod);
+    limiter.changeTimeoutDuration(newTimeoutDuration);
+  }
+
+  @RateLimiter(name = "fallbackExample", fallbackMethod = "localCacheFlightSearch")
+  public List<Flight> fallbackExample(SearchRequest request) {
+    return remoteSearchService.searchFlights(request);
+  }
+
+  private List<Flight> localCacheFlightSearch(SearchRequest request, RequestNotPermitted rnp) {
+    System.out.println("Returning search results from cache");
+    return Arrays.asList(
+        new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
+        new Flight("XY 781", request.getFlightDate(), request.getFrom(), request.getTo()));
+  }
+
+  @PostConstruct
+  public void postConstruct() {
+    io.github.resilience4j.retry.Retry.EventPublisher retryEventPublisher = retryRegistry
+        .retry("retryAndRateLimitExample")
+        .getEventPublisher();
+
+    retryEventPublisher.onRetry(System.out::println);
+    retryEventPublisher.onSuccess(System.out::println);
+
+    io.github.resilience4j.ratelimiter.RateLimiter.EventPublisher eventPublisher = registry
+        .rateLimiter("rateLimiterEventsExample")
+        .getEventPublisher();
+
+    eventPublisher.onSuccess(System.out::println);
+    eventPublisher.onFailure(System.out::println);
+  }
+}
+
+@Component
+class RPMRateLimitedFlightSearchSearch {
+  @RateLimiter(name = "multipleRateLimiters_rpm_limiter")
+  List<Flight> searchFlights(SearchRequest request, FlightSearchService remoteSearchService) {
+    return remoteSearchService.searchFlights(request);
+  }
+}

resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/SpringbootResilience4jApplication.java

@@ -11,6 +11,9 @@ public class SpringbootResilience4jApplication {
 	@Autowired
 	private RetryExamplesRunner retryExamplesRunner;
 
+	@Autowired
+	private RateLimiterExamplesRunner rateLimiterExamplesRunner;
+
 	public static void main(String[] args) {
 		SpringApplication.run(SpringbootResilience4jApplication.class, args);
 	}
@@ -18,5 +21,6 @@ public class SpringbootResilience4jApplication {
 	@EventListener(ApplicationReadyEvent.class)
 	public void runExamples() {
 		retryExamplesRunner.run();
+		rateLimiterExamplesRunner.run();
 	}
 }

resilience4j/springboot-resilience4j/src/main/resources/application.yml

@@ -44,6 +44,61 @@ resilience4j:
           - java.lang.Exception
         waitDuration: 2s
 
+      # Retry object used in RateLimitingService.retryAndRateLimitExample()
+      retryAndRateLimitExample:
+        maxRetryAttempts: 2
+        waitDuration: 1s
+
+  ratelimiter:
+    instances:
+
+      # RateLimiter object used in RateLimitingService.basicExample()
+      basicExample:
+        limitForPeriod: 1
+        limitRefreshPeriod: 1s
+        timeoutDuration: 1s
+
+      # RateLimiter object used in RateLimitingService.timeoutExample()
+      timeoutExample:
+        limitForPeriod: 1
+        limitRefreshPeriod: 1s
+        timeoutDuration: 250ms
+
+      # RateLimiter object used in RateLimitingService.multipleRateLimitsExample()
+      multipleRateLimiters_rps_limiter:
+        limitForPeriod: 2
+        limitRefreshPeriod: 1s
+        timeoutDuration: 2s
+
+      multipleRateLimiters_rpm_limiter:
+        limitForPeriod: 40
+        limitRefreshPeriod: 1m
+        timeoutDuration: 2s
+
+      # RateLimiter object used in RateLimitingService.changeLimitsExample()
+      changeLimitsExample:
+        limitForPeriod: 1
+        limitRefreshPeriod: 1s
+        timeoutDuration: 1s
+
+      # RateLimiter object used in RateLimitingService.retryAndRateLimitExample()
+      retryAndRateLimitExample:
+        limitForPeriod: 1
+        limitRefreshPeriod: 1s
+        timeoutDuration: 250ms
+
+      # RateLimiter object used in RateLimitingService.rateLimiterEventsExample()
+      rateLimiterEventsExample:
+        limitForPeriod: 1
+        limitRefreshPeriod: 1s
+        timeoutDuration: 50ms
+
+      # RateLimiter object used in RateLimitingService.fallbackExample()
+      fallbackExample:
+        limitForPeriod: 1
+        limitRefreshPeriod: 1s
+        timeoutDuration: 500ms
+
 management:
   endpoints:
     web:

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/FeatureFlagService.java

@@ -22,4 +22,6 @@ public interface FeatureFlagService {
      */
     Boolean isUserActionTargetedFeatureActive();
 
+    Boolean isNewServiceEnabled();
+
 }

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/ff4j/FF4JFeatureFlagService.java

@@ -33,4 +33,9 @@ public class FF4JFeatureFlagService implements FeatureFlagService {
         return null;
     }
 
+    @Override
+    public Boolean isNewServiceEnabled() {
+        return null;
+    }
+
 }

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/launchdarkly/LaunchDarklyFeatureFlagService.java

@@ -4,11 +4,13 @@ import com.launchdarkly.sdk.LDUser;
 import com.launchdarkly.sdk.server.LDClient;
 import io.reflectoring.featureflags.FeatureFlagService;
 import io.reflectoring.featureflags.web.UserSession;
+import org.springframework.context.annotation.Primary;
 import org.springframework.stereotype.Component;
 
 import javax.annotation.PostConstruct;
 
 @Component("launchdarkly")
+@Primary
 public class LaunchDarklyFeatureFlagService implements FeatureFlagService {
 
     private final LDClient launchdarklyClient;
@@ -56,6 +58,11 @@ public class LaunchDarklyFeatureFlagService implements FeatureFlagService {
         return launchdarklyClient.boolVariation("user-clicked-flag", getLaunchdarklyUserFromSession(), false);
     }
 
+    @Override
+    public Boolean isNewServiceEnabled() {
+        return true;
+    }
+
     private LDUser getLaunchdarklyUserFromSession() {
         return new LDUser.Builder(userSession.getUsername())
                 .custom("clicked", userSession.hasClicked())

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/ifelse/Service.java

@@ -0,0 +1,22 @@
+package io.reflectoring.featureflags.patterns.ifelse;
+
+import io.reflectoring.featureflags.FeatureFlagService;
+import org.springframework.stereotype.Component;
+
+@Component
+class Service {
+
+    private final FeatureFlagService featureFlagService;
+
+    public Service(FeatureFlagService featureFlagService) {
+        this.featureFlagService = featureFlagService;
+    }
+
+    public String doSomething() {
+        if (featureFlagService.isNewServiceEnabled()) {
+            return "new value";
+        } else {
+            return "old value";
+        }
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacebean/FeatureFlagFactoryBean.java

@@ -0,0 +1,42 @@
+package io.reflectoring.featureflags.patterns.replacebean;
+
+import org.springframework.beans.factory.FactoryBean;
+
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Proxy;
+import java.util.function.Supplier;
+
+public class FeatureFlagFactoryBean<T> implements FactoryBean<T> {
+
+    private final Class<T> targetClass;
+    private final Supplier<Boolean> featureFlagEvaluation;
+    private final T beanWhenTrue;
+    private final T beanWhenFalse;
+
+    public FeatureFlagFactoryBean(Class<T> targetClass, Supplier<Boolean> featureFlagEvaluation, T beanWhenTrue, T beanWhenFalse) {
+        this.targetClass = targetClass;
+        this.featureFlagEvaluation = featureFlagEvaluation;
+        this.beanWhenTrue = beanWhenTrue;
+        this.beanWhenFalse = beanWhenFalse;
+    }
+
+    @Override
+    public T getObject() {
+        InvocationHandler invocationHandler = (proxy, method, args) -> {
+            if (featureFlagEvaluation.get()) {
+                return method.invoke(beanWhenTrue, args);
+            } else {
+                return method.invoke(beanWhenFalse, args);
+            }
+        };
+
+        Object proxy = Proxy.newProxyInstance(targetClass.getClassLoader(), new Class[]{targetClass}, invocationHandler);
+
+        return (T) proxy;
+    }
+
+    @Override
+    public Class<?> getObjectType() {
+        return targetClass;
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacebean/FeatureFlaggedService.java

@@ -0,0 +1,16 @@
+package io.reflectoring.featureflags.patterns.replacebean;
+
+import io.reflectoring.featureflags.FeatureFlagService;
+import org.springframework.stereotype.Component;
+
+@Component("replaceBeanFeatureFlaggedService")
+class FeatureFlaggedService extends FeatureFlagFactoryBean<Service> {
+
+    public FeatureFlaggedService(FeatureFlagService featureFlagService) {
+        super(
+                Service.class,
+                featureFlagService::isNewServiceEnabled,
+                new NewService(),
+                new OldService());
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacebean/NewService.java

@@ -0,0 +1,8 @@
+package io.reflectoring.featureflags.patterns.replacebean;
+
+class NewService implements Service {
+    @Override
+    public String doSomething() {
+        return "new value";
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacebean/OldService.java

@@ -0,0 +1,8 @@
+package io.reflectoring.featureflags.patterns.replacebean;
+
+class OldService implements Service {
+    @Override
+    public String doSomething() {
+        return "old value";
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacebean/Service.java

@@ -0,0 +1,7 @@
+package io.reflectoring.featureflags.patterns.replacebean;
+
+interface Service {
+
+    String doSomething();
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemethod/FeatureFlaggedService.java

@@ -0,0 +1,30 @@
+package io.reflectoring.featureflags.patterns.replacemethod;
+
+import io.reflectoring.featureflags.FeatureFlagService;
+import org.springframework.context.annotation.Primary;
+import org.springframework.stereotype.Component;
+
+@Component("replaceMethodFeatureFlaggedService")
+@Primary
+class FeatureFlaggedService implements Service {
+
+    private final FeatureFlagService featureFlagService;
+    private final NewService newService;
+    private final OldService oldService;
+
+    public FeatureFlaggedService(FeatureFlagService featureFlagService, NewService newService, OldService oldService) {
+        this.featureFlagService = featureFlagService;
+        this.newService = newService;
+        this.oldService = oldService;
+    }
+
+    @Override
+    public String doSomething() {
+        if (featureFlagService.isNewServiceEnabled()) {
+            return newService.doSomething();
+        } else {
+            return oldService.doSomething();
+        }
+    }
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemethod/NewService.java

@@ -0,0 +1,12 @@
+package io.reflectoring.featureflags.patterns.replacemethod;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class NewService implements Service {
+    @Override
+    public String doSomething() {
+        return "new value";
+    }
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemethod/OldService.java

@@ -0,0 +1,16 @@
+package io.reflectoring.featureflags.patterns.replacemethod;
+
+import org.springframework.stereotype.Component;
+
+@Component
+class OldService implements Service {
+    @Override
+    public String doSomething() {
+        return "old value";
+    }
+
+    public int doSomethingElse(){
+        return 2;
+    }
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemethod/Service.java

@@ -0,0 +1,7 @@
+package io.reflectoring.featureflags.patterns.replacemethod;
+
+interface Service {
+
+    String doSomething();
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/FeatureFlaggedServiceModule.java

@@ -0,0 +1,31 @@
+package io.reflectoring.featureflags.patterns.replacemodule;
+
+import io.reflectoring.featureflags.FeatureFlagService;
+import io.reflectoring.featureflags.patterns.replacebean.FeatureFlagFactoryBean;
+import io.reflectoring.featureflags.patterns.replacemodule.newmodule.NewService1;
+import io.reflectoring.featureflags.patterns.replacemodule.newmodule.NewService2;
+import io.reflectoring.featureflags.patterns.replacemodule.oldmodule.OldService1;
+import io.reflectoring.featureflags.patterns.replacemodule.oldmodule.OldService2;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class FeatureFlaggedServiceModule {
+
+    private final FeatureFlagService featureFlagService;
+
+    public FeatureFlaggedServiceModule(FeatureFlagService featureFlagService) {
+        this.featureFlagService = featureFlagService;
+    }
+
+    @Bean("replaceModuleService1")
+    FeatureFlagFactoryBean<Service1> service1() {
+        return new FeatureFlagFactoryBean<>(Service1.class, featureFlagService::isNewServiceEnabled, new NewService1(), new OldService1());
+    }
+
+    @Bean("replaceModuleService2")
+    FeatureFlagFactoryBean<Service2> service2() {
+        return new FeatureFlagFactoryBean<>(Service2.class, featureFlagService::isNewServiceEnabled, new NewService2(), new OldService2());
+    }
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/Service1.java

@@ -0,0 +1,7 @@
+package io.reflectoring.featureflags.patterns.replacemodule;
+
+public interface Service1 {
+
+    String doSomething();
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/Service2.java

@@ -0,0 +1,7 @@
+package io.reflectoring.featureflags.patterns.replacemodule;
+
+public interface Service2 {
+
+    String doSomethingElse();
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/ServiceModule.java

@@ -0,0 +1,21 @@
+package io.reflectoring.featureflags.patterns.replacemodule;
+
+import io.reflectoring.featureflags.patterns.replacemodule.oldmodule.OldService1;
+import io.reflectoring.featureflags.patterns.replacemodule.oldmodule.OldService2;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+class ServiceModule {
+
+    @Bean
+    Service1 service1() {
+        return new OldService1();
+    }
+
+    @Bean
+    Service2 service2() {
+        return new OldService2();
+    }
+
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/newmodule/NewService1.java

@@ -0,0 +1,12 @@
+package io.reflectoring.featureflags.patterns.replacemodule.newmodule;
+
+import io.reflectoring.featureflags.patterns.replacemodule.Service1;
+import org.springframework.stereotype.Component;
+
+@Component
+public class NewService1 implements Service1 {
+    @Override
+    public String doSomething() {
+        return "new value";
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/newmodule/NewService2.java

@@ -0,0 +1,13 @@
+package io.reflectoring.featureflags.patterns.replacemodule.newmodule;
+
+import io.reflectoring.featureflags.patterns.replacemodule.Service2;
+import org.springframework.stereotype.Component;
+
+@Component
+public class NewService2 implements Service2 {
+
+    @Override
+    public String doSomethingElse() {
+        return "another nwe value";
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/oldmodule/OldService1.java

@@ -0,0 +1,12 @@
+package io.reflectoring.featureflags.patterns.replacemodule.oldmodule;
+
+import io.reflectoring.featureflags.patterns.replacemodule.Service1;
+import org.springframework.stereotype.Component;
+
+@Component
+public class OldService1 implements Service1 {
+    @Override
+    public String doSomething() {
+        return "old value";
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/patterns/replacemodule/oldmodule/OldService2.java

@@ -0,0 +1,13 @@
+package io.reflectoring.featureflags.patterns.replacemodule.oldmodule;
+
+import io.reflectoring.featureflags.patterns.replacemodule.Service2;
+import org.springframework.stereotype.Component;
+
+@Component
+public class OldService2 implements Service2 {
+
+    @Override
+    public String doSomethingElse() {
+        return "another old value";
+    }
+}

spring-boot/feature-flags/src/main/java/io/reflectoring/featureflags/togglz/TooglzFeatureFlagService.java

@@ -26,4 +26,9 @@ public class TooglzFeatureFlagService implements FeatureFlagService {
         return Features.USER_ACTION_TARGETED_FEATURE.isActive();
     }
 
+    @Override
+    public Boolean isNewServiceEnabled() {
+        return false;
+    }
+
 }

spring-boot/feature-flags/src/test/java/io/reflectoring/featureflags/patterns/replacebean/ReplaceBeanTest.java

@@ -0,0 +1,40 @@
+package io.reflectoring.featureflags.patterns.replacebean;
+
+import io.reflectoring.featureflags.FeatureFlagService;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.mockito.BDDMockito.given;
+
+@SpringBootTest
+public class ReplaceBeanTest {
+
+    @MockBean
+    private FeatureFlagService featureFlagService;
+
+    @Autowired
+    private Service service;
+
+    @BeforeEach
+    void resetMocks() {
+        Mockito.reset(featureFlagService);
+    }
+
+    @Test
+    void oldServiceTest() {
+        given(featureFlagService.isNewServiceEnabled()).willReturn(false);
+        assertThat(service.doSomething()).isEqualTo("old value");
+    }
+
+    @Test
+    void newServiceTest() {
+        given(featureFlagService.isNewServiceEnabled()).willReturn(true);
+        assertThat(service.doSomething()).isEqualTo("new value");
+    }
+
+}

spring-boot/feature-flags/src/test/java/io/reflectoring/featureflags/patterns/replacemethod/ReplaceMethodTest.java

@@ -0,0 +1,46 @@
+package io.reflectoring.featureflags.patterns.replacemethod;
+
+import io.reflectoring.featureflags.FeatureFlagService;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.mockito.Mockito;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static org.mockito.BDDMockito.given;
+
+@SpringBootTest
+public class ReplaceMethodTest {
+
+    @MockBean
+    private FeatureFlagService featureFlagService;
+
+    @Autowired
+    private Service service;
+
+    @Autowired
+    private OldService oldService;
+
+    @BeforeEach
+    void resetMocks() {
+        Mockito.reset(featureFlagService);
+    }
+
+    @Test
+    void oldServiceTest() {
+        given(featureFlagService.isNewServiceEnabled()).willReturn(false);
+        assertThat(service.doSomething()).isEqualTo("old value");
+        assertThat(oldService.doSomethingElse()).isEqualTo(2);
+    }
+
+    @Test
+    void newServiceTest() {
+        given(featureFlagService.isNewServiceEnabled()).willReturn(true);
+        assertThat(service.doSomething()).isEqualTo("new value");
+        // doSomethingElse() is not behind a feature flag, so it should return the same value independant of the feature flag
+        assertThat(oldService.doSomethingElse()).isEqualTo(2);
+    }
+
+}

spring-boot/spring-boot-scheduler/.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-scheduler/.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-scheduler/README.md

@@ -0,0 +1,3 @@
+# Related Blog Posts
+
+* [Running Scheduled Jobs in Spring Boot](https://reflectoring.io/spring-scheduler/)

spring-boot/spring-boot-scheduler/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} $MAVEN_CONFIG "$@"

spring-boot/spring-boot-scheduler/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%

spring-boot/spring-boot-scheduler/pom.xml

@@ -0,0 +1,60 @@
+<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>2.5.4</version>
+		<relativePath /> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>io.pratik</groupId>
+	<artifactId>jobscheduling</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>jobscheduling</name>
+	<description>Demo project for Schedulers in Spring Boot</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>net.javacrumbs.shedlock</groupId>
+			<artifactId>shedlock-spring</artifactId>
+			<version>4.27.0</version>
+		</dependency>
+
+		<dependency>
+			<groupId>net.javacrumbs.shedlock</groupId>
+			<artifactId>shedlock-provider-jdbc-template</artifactId>
+			<version>4.27.0</version>
+		</dependency>
+
+		<dependency>
+			<groupId>com.h2database</groupId>
+			<artifactId>h2</artifactId>
+			<scope>runtime</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<plugins>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

spring-boot/spring-boot-scheduler/src/main/java/io/pratik/jobscheduling/JobschedulingApplication.java

@@ -0,0 +1,13 @@
+package io.pratik.jobscheduling;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class JobschedulingApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(JobschedulingApplication.class, args);
+	}
+
+}

spring-boot/spring-boot-scheduler/src/main/java/io/pratik/jobscheduling/config/SchedulerConfig.java

@@ -0,0 +1,40 @@
+/**
+ * 
+ */
+package io.pratik.jobscheduling.config;
+
+import javax.sql.DataSource;
+
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.jdbc.core.JdbcTemplate;
+import org.springframework.scheduling.annotation.EnableAsync;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+import net.javacrumbs.shedlock.core.LockProvider;
+import net.javacrumbs.shedlock.provider.jdbctemplate.JdbcTemplateLockProvider;
+import net.javacrumbs.shedlock.spring.annotation.EnableSchedulerLock;
+
+/**
+ * @author pratikdas
+ *
+ */
+@Configuration
+@EnableScheduling
+@EnableSchedulerLock(defaultLockAtMostFor = "10m")
+@EnableAsync
+@ConditionalOnProperty(name="scheduler.enabled", matchIfMissing = true)
+public class SchedulerConfig {
+	
+	@Bean
+	public LockProvider lockProvider(DataSource dataSource) {
+	            return new JdbcTemplateLockProvider(
+	                JdbcTemplateLockProvider.Configuration.builder()
+	                .withJdbcTemplate(new JdbcTemplate(dataSource))
+	                .usingDbTime() // Works on Postgres, MySQL, MariaDb, MS SQL, Oracle, DB2, HSQL and H2
+	                .build()
+	            );
+	}
+
+}

spring-boot/spring-boot-scheduler/src/main/java/io/pratik/jobscheduling/jobs/PricingEngine.java

@@ -0,0 +1,53 @@
+/**
+ * 
+ */
+package io.pratik.jobscheduling.jobs;
+
+import java.time.LocalDateTime;
+import java.time.ZoneOffset;
+import java.util.Random;
+import java.util.logging.Logger;
+
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Service;
+
+import net.javacrumbs.shedlock.spring.annotation.SchedulerLock;
+
+/**
+ * @author pratikdas
+ *
+ */
+@Service
+public class PricingEngine {
+	
+	static final Logger LOGGER = Logger.getLogger(PricingEngine.class.getName());
+	private Double price;
+	
+	public Double getProductPrice() {
+		return price;
+		
+	}
+	
+	//@Scheduled(fixedDelayString = "${interval}")
+	//@Scheduled(cron = "@hourly")
+	@Scheduled(cron = "${interval-in-cron}")
+	@SchedulerLock(name = "scheduledTaskName")
+	public void computePrice() throws InterruptedException {
+		
+		Random random = new Random();
+		price = random.nextDouble() * 100;
+		LOGGER.info("computing price at "+ LocalDateTime.now().toEpochSecond(ZoneOffset.UTC));	
+		Thread.sleep(4000);
+	}
+	
+	//@Scheduled(fixedRateString = "${interval}")
+	@Scheduled(initialDelay = 2000, fixedRate = 3000)
+	@Async
+	public void refreshPricingParameters() {
+		
+		// update pricing parameters
+		LOGGER.info("computing price at "+ LocalDateTime.now().toEpochSecond(ZoneOffset.UTC));	
+	}
+
+}

spring-boot/spring-boot-scheduler/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+scheduler.enabled=true
+interval=PT02S
+interval-in-cron=0 * * * * *

spring-boot/spring-boot-scheduler/src/main/resources/data.sql

@@ -0,0 +1,9 @@
+DROP TABLE IF EXISTS shedlock;
+
+CREATE TABLE shedlock(
+	name VARCHAR(64) NOT NULL, 
+	lock_until TIMESTAMP(3) NOT NULL,
+	locked_at TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3), 
+	locked_by VARCHAR(255) NOT NULL, 
+	PRIMARY KEY (name)
+);

spring-boot/spring-boot-scheduler/src/test/java/io/pratik/jobscheduling/JobschedulingApplicationTests.java

@@ -0,0 +1,13 @@
+package io.pratik.jobscheduling;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class JobschedulingApplicationTests {
+
+	@Test
+	void contextLoads() {
+	}
+
+}