diff --git a/build-all.sh b/build-all.sh index 1444368..4f3d2ae 100755 --- a/build-all.sh +++ b/build-all.sh @@ -130,6 +130,7 @@ then build_maven_module "resilience4j/retry" build_maven_module "resilience4j/ratelimiter" build_maven_module "resilience4j/timelimiter" + build_maven_module "resilience4j/bulkhead" build_gradle_module "spring-data/spring-data-jdbc-converter" build_gradle_module "reactive" build_gradle_module "junit/assumptions" diff --git a/resilience4j/bulkhead/.mvn/wrapper/MavenWrapperDownloader.java b/resilience4j/bulkhead/.mvn/wrapper/MavenWrapperDownloader.java new file mode 100644 index 0000000..b901097 --- /dev/null +++ b/resilience4j/bulkhead/.mvn/wrapper/MavenWrapperDownloader.java @@ -0,0 +1,117 @@ +/* + * Copyright 2007-present the original author or authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +import java.net.*; +import java.io.*; +import java.nio.channels.*; +import java.util.Properties; + +public class MavenWrapperDownloader { + + private static final String WRAPPER_VERSION = "0.5.6"; + /** + * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. + */ + private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/" + + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar"; + + /** + * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to + * use instead of the default one. + */ + private static final String MAVEN_WRAPPER_PROPERTIES_PATH = + ".mvn/wrapper/maven-wrapper.properties"; + + /** + * Path where the maven-wrapper.jar will be saved to. + */ + private static final String MAVEN_WRAPPER_JAR_PATH = + ".mvn/wrapper/maven-wrapper.jar"; + + /** + * Name of the property which should be used to override the default download url for the wrapper. + */ + private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; + + public static void main(String args[]) { + System.out.println("- Downloader started"); + File baseDirectory = new File(args[0]); + System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); + + // If the maven-wrapper.properties exists, read it and check if it contains a custom + // wrapperUrl parameter. + File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); + String url = DEFAULT_DOWNLOAD_URL; + if(mavenWrapperPropertyFile.exists()) { + FileInputStream mavenWrapperPropertyFileInputStream = null; + try { + mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); + Properties mavenWrapperProperties = new Properties(); + mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); + url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); + } catch (IOException e) { + System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); + } finally { + try { + if(mavenWrapperPropertyFileInputStream != null) { + mavenWrapperPropertyFileInputStream.close(); + } + } catch (IOException e) { + // Ignore ... + } + } + } + System.out.println("- Downloading from: " + url); + + File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); + if(!outputFile.getParentFile().exists()) { + if(!outputFile.getParentFile().mkdirs()) { + System.out.println( + "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'"); + } + } + System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); + try { + downloadFileFromURL(url, outputFile); + System.out.println("Done"); + System.exit(0); + } catch (Throwable e) { + System.out.println("- Error downloading"); + e.printStackTrace(); + System.exit(1); + } + } + + private static void downloadFileFromURL(String urlString, File destination) throws Exception { + if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) { + String username = System.getenv("MVNW_USERNAME"); + char[] password = System.getenv("MVNW_PASSWORD").toCharArray(); + Authenticator.setDefault(new Authenticator() { + @Override + protected PasswordAuthentication getPasswordAuthentication() { + return new PasswordAuthentication(username, password); + } + }); + } + URL website = new URL(urlString); + ReadableByteChannel rbc; + rbc = Channels.newChannel(website.openStream()); + FileOutputStream fos = new FileOutputStream(destination); + fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); + fos.close(); + rbc.close(); + } + +} diff --git a/resilience4j/bulkhead/.mvn/wrapper/maven-wrapper.jar b/resilience4j/bulkhead/.mvn/wrapper/maven-wrapper.jar new file mode 100644 index 0000000..2cc7d4a Binary files /dev/null and b/resilience4j/bulkhead/.mvn/wrapper/maven-wrapper.jar differ diff --git a/resilience4j/bulkhead/.mvn/wrapper/maven-wrapper.properties b/resilience4j/bulkhead/.mvn/wrapper/maven-wrapper.properties new file mode 100644 index 0000000..642d572 --- /dev/null +++ b/resilience4j/bulkhead/.mvn/wrapper/maven-wrapper.properties @@ -0,0 +1,2 @@ +distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.6.3/apache-maven-3.6.3-bin.zip +wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar diff --git a/resilience4j/bulkhead/README.md b/resilience4j/bulkhead/README.md new file mode 100644 index 0000000..f09e256 --- /dev/null +++ b/resilience4j/bulkhead/README.md @@ -0,0 +1,10 @@ +# Bulkhead with Resilience4J + +Run the Examples program. + +## Blog posts + +* [Implementing Bulkhead with Resilience4j](https://reflectoring.io/bulkhead-with-resilience4j) + + + diff --git a/resilience4j/bulkhead/mvnw b/resilience4j/bulkhead/mvnw new file mode 100755 index 0000000..41c0f0c --- /dev/null +++ b/resilience4j/bulkhead/mvnw @@ -0,0 +1,310 @@ +#!/bin/sh +# ---------------------------------------------------------------------------- +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +# ---------------------------------------------------------------------------- + +# ---------------------------------------------------------------------------- +# Maven Start Up Batch script +# +# Required ENV vars: +# ------------------ +# JAVA_HOME - location of a JDK home dir +# +# Optional ENV vars +# ----------------- +# M2_HOME - location of maven2's installed home dir +# MAVEN_OPTS - parameters passed to the Java VM when running Maven +# e.g. to debug Maven itself, use +# set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +# MAVEN_SKIP_RC - flag to disable loading of mavenrc files +# ---------------------------------------------------------------------------- + +if [ -z "$MAVEN_SKIP_RC" ] ; then + + if [ -f /etc/mavenrc ] ; then + . /etc/mavenrc + fi + + if [ -f "$HOME/.mavenrc" ] ; then + . "$HOME/.mavenrc" + fi + +fi + +# OS specific support. $var _must_ be set to either true or false. +cygwin=false; +darwin=false; +mingw=false +case "`uname`" in + CYGWIN*) cygwin=true ;; + MINGW*) mingw=true;; + Darwin*) darwin=true + # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home + # See https://developer.apple.com/library/mac/qa/qa1170/_index.html + if [ -z "$JAVA_HOME" ]; then + if [ -x "/usr/libexec/java_home" ]; then + export JAVA_HOME="`/usr/libexec/java_home`" + else + export JAVA_HOME="/Library/Java/Home" + fi + fi + ;; +esac + +if [ -z "$JAVA_HOME" ] ; then + if [ -r /etc/gentoo-release ] ; then + JAVA_HOME=`java-config --jre-home` + fi +fi + +if [ -z "$M2_HOME" ] ; then + ## resolve links - $0 may be a link to maven's home + PRG="$0" + + # need this for relative symlinks + while [ -h "$PRG" ] ; do + ls=`ls -ld "$PRG"` + link=`expr "$ls" : '.*-> \(.*\)$'` + if expr "$link" : '/.*' > /dev/null; then + PRG="$link" + else + PRG="`dirname "$PRG"`/$link" + fi + done + + saveddir=`pwd` + + M2_HOME=`dirname "$PRG"`/.. + + # make it fully qualified + M2_HOME=`cd "$M2_HOME" && pwd` + + cd "$saveddir" + # echo Using m2 at $M2_HOME +fi + +# For Cygwin, ensure paths are in UNIX format before anything is touched +if $cygwin ; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --unix "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --unix "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --unix "$CLASSPATH"` +fi + +# For Mingw, ensure paths are in UNIX format before anything is touched +if $mingw ; then + [ -n "$M2_HOME" ] && + M2_HOME="`(cd "$M2_HOME"; pwd)`" + [ -n "$JAVA_HOME" ] && + JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`" +fi + +if [ -z "$JAVA_HOME" ]; then + javaExecutable="`which javac`" + if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then + # readlink(1) is not available as standard on Solaris 10. + readLink=`which readlink` + if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then + if $darwin ; then + javaHome="`dirname \"$javaExecutable\"`" + javaExecutable="`cd \"$javaHome\" && pwd -P`/javac" + else + javaExecutable="`readlink -f \"$javaExecutable\"`" + fi + javaHome="`dirname \"$javaExecutable\"`" + javaHome=`expr "$javaHome" : '\(.*\)/bin'` + JAVA_HOME="$javaHome" + export JAVA_HOME + fi + fi +fi + +if [ -z "$JAVACMD" ] ; then + if [ -n "$JAVA_HOME" ] ; then + if [ -x "$JAVA_HOME/jre/sh/java" ] ; then + # IBM's JDK on AIX uses strange locations for the executables + JAVACMD="$JAVA_HOME/jre/sh/java" + else + JAVACMD="$JAVA_HOME/bin/java" + fi + else + JAVACMD="`which java`" + fi +fi + +if [ ! -x "$JAVACMD" ] ; then + echo "Error: JAVA_HOME is not defined correctly." >&2 + echo " We cannot execute $JAVACMD" >&2 + exit 1 +fi + +if [ -z "$JAVA_HOME" ] ; then + echo "Warning: JAVA_HOME environment variable is not set." +fi + +CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher + +# traverses directory structure from process work directory to filesystem root +# first directory with .mvn subdirectory is considered project base directory +find_maven_basedir() { + + if [ -z "$1" ] + then + echo "Path not specified to find_maven_basedir" + return 1 + fi + + basedir="$1" + wdir="$1" + while [ "$wdir" != '/' ] ; do + if [ -d "$wdir"/.mvn ] ; then + basedir=$wdir + break + fi + # workaround for JBEAP-8937 (on Solaris 10/Sparc) + if [ -d "${wdir}" ]; then + wdir=`cd "$wdir/.."; pwd` + fi + # end of workaround + done + echo "${basedir}" +} + +# concatenates all lines of a file +concat_lines() { + if [ -f "$1" ]; then + echo "$(tr -s '\n' ' ' < "$1")" + fi +} + +BASE_DIR=`find_maven_basedir "$(pwd)"` +if [ -z "$BASE_DIR" ]; then + exit 1; +fi + +########################################################################################## +# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +# This allows using the maven wrapper in projects that prohibit checking in binary data. +########################################################################################## +if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found .mvn/wrapper/maven-wrapper.jar" + fi +else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..." + fi + if [ -n "$MVNW_REPOURL" ]; then + jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + else + jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + fi + while IFS="=" read key value; do + case "$key" in (wrapperUrl) jarUrl="$value"; break ;; + esac + done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties" + if [ "$MVNW_VERBOSE" = true ]; then + echo "Downloading from: $jarUrl" + fi + wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" + if $cygwin; then + wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"` + fi + + if command -v wget > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found wget ... using wget" + fi + if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then + wget "$jarUrl" -O "$wrapperJarPath" + else + wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath" + fi + elif command -v curl > /dev/null; then + if [ "$MVNW_VERBOSE" = true ]; then + echo "Found curl ... using curl" + fi + if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then + curl -o "$wrapperJarPath" "$jarUrl" -f + else + curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f + fi + + else + if [ "$MVNW_VERBOSE" = true ]; then + echo "Falling back to using Java to download" + fi + javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java" + # For Cygwin, switch paths to Windows format before running javac + if $cygwin; then + javaClass=`cygpath --path --windows "$javaClass"` + fi + if [ -e "$javaClass" ]; then + if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Compiling MavenWrapperDownloader.java ..." + fi + # Compiling the Java class + ("$JAVA_HOME/bin/javac" "$javaClass") + fi + if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then + # Running the downloader + if [ "$MVNW_VERBOSE" = true ]; then + echo " - Running MavenWrapperDownloader.java ..." + fi + ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR") + fi + fi + fi +fi +########################################################################################## +# End of extension +########################################################################################## + +export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"} +if [ "$MVNW_VERBOSE" = true ]; then + echo $MAVEN_PROJECTBASEDIR +fi +MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS" + +# For Cygwin, switch paths to Windows format before running java +if $cygwin; then + [ -n "$M2_HOME" ] && + M2_HOME=`cygpath --path --windows "$M2_HOME"` + [ -n "$JAVA_HOME" ] && + JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"` + [ -n "$CLASSPATH" ] && + CLASSPATH=`cygpath --path --windows "$CLASSPATH"` + [ -n "$MAVEN_PROJECTBASEDIR" ] && + MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"` +fi + +# Provide a "standardized" way to retrieve the CLI args that will +# work with both Windows and non-Windows executions. +MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@" +export MAVEN_CMD_LINE_ARGS + +WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +exec "$JAVACMD" \ + $MAVEN_OPTS \ + -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \ + "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \ + ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@" diff --git a/resilience4j/bulkhead/mvnw.cmd b/resilience4j/bulkhead/mvnw.cmd new file mode 100644 index 0000000..8611571 --- /dev/null +++ b/resilience4j/bulkhead/mvnw.cmd @@ -0,0 +1,182 @@ +@REM ---------------------------------------------------------------------------- +@REM Licensed to the Apache Software Foundation (ASF) under one +@REM or more contributor license agreements. See the NOTICE file +@REM distributed with this work for additional information +@REM regarding copyright ownership. The ASF licenses this file +@REM to you under the Apache License, Version 2.0 (the +@REM "License"); you may not use this file except in compliance +@REM with the License. You may obtain a copy of the License at +@REM +@REM http://www.apache.org/licenses/LICENSE-2.0 +@REM +@REM Unless required by applicable law or agreed to in writing, +@REM software distributed under the License is distributed on an +@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +@REM KIND, either express or implied. See the License for the +@REM specific language governing permissions and limitations +@REM under the License. +@REM ---------------------------------------------------------------------------- + +@REM ---------------------------------------------------------------------------- +@REM Maven Start Up Batch script +@REM +@REM Required ENV vars: +@REM JAVA_HOME - location of a JDK home dir +@REM +@REM Optional ENV vars +@REM M2_HOME - location of maven2's installed home dir +@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands +@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending +@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven +@REM e.g. to debug Maven itself, use +@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000 +@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files +@REM ---------------------------------------------------------------------------- + +@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on' +@echo off +@REM set title of command window +title %0 +@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on' +@if "%MAVEN_BATCH_ECHO%" == "on" echo %MAVEN_BATCH_ECHO% + +@REM set %HOME% to equivalent of $HOME +if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%") + +@REM Execute a user defined script before this one +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre +@REM check for pre script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat" +if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd" +:skipRcPre + +@setlocal + +set ERROR_CODE=0 + +@REM To isolate internal variables from possible post scripts, we use another setlocal +@setlocal + +@REM ==== START VALIDATION ==== +if not "%JAVA_HOME%" == "" goto OkJHome + +echo. +echo Error: JAVA_HOME not found in your environment. >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +:OkJHome +if exist "%JAVA_HOME%\bin\java.exe" goto init + +echo. +echo Error: JAVA_HOME is set to an invalid directory. >&2 +echo JAVA_HOME = "%JAVA_HOME%" >&2 +echo Please set the JAVA_HOME variable in your environment to match the >&2 +echo location of your Java installation. >&2 +echo. +goto error + +@REM ==== END VALIDATION ==== + +:init + +@REM Find the project base dir, i.e. the directory that contains the folder ".mvn". +@REM Fallback to current working directory if not found. + +set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR% +IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir + +set EXEC_DIR=%CD% +set WDIR=%EXEC_DIR% +:findBaseDir +IF EXIST "%WDIR%"\.mvn goto baseDirFound +cd .. +IF "%WDIR%"=="%CD%" goto baseDirNotFound +set WDIR=%CD% +goto findBaseDir + +:baseDirFound +set MAVEN_PROJECTBASEDIR=%WDIR% +cd "%EXEC_DIR%" +goto endDetectBaseDir + +:baseDirNotFound +set MAVEN_PROJECTBASEDIR=%EXEC_DIR% +cd "%EXEC_DIR%" + +:endDetectBaseDir + +IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig + +@setlocal EnableExtensions EnableDelayedExpansion +for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a +@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS% + +:endReadAdditionalConfig + +SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe" +set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar" +set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain + +set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + +FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO ( + IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B +) + +@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central +@REM This allows using the maven wrapper in projects that prohibit checking in binary data. +if exist %WRAPPER_JAR% ( + if "%MVNW_VERBOSE%" == "true" ( + echo Found %WRAPPER_JAR% + ) +) else ( + if not "%MVNW_REPOURL%" == "" ( + SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar" + ) + if "%MVNW_VERBOSE%" == "true" ( + echo Couldn't find %WRAPPER_JAR%, downloading it ... + echo Downloading from: %DOWNLOAD_URL% + ) + + powershell -Command "&{"^ + "$webclient = new-object System.Net.WebClient;"^ + "if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^ + "$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^ + "}"^ + "[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^ + "}" + if "%MVNW_VERBOSE%" == "true" ( + echo Finished downloading %WRAPPER_JAR% + ) +) +@REM End of extension + +@REM Provide a "standardized" way to retrieve the CLI args that will +@REM work with both Windows and non-Windows executions. +set MAVEN_CMD_LINE_ARGS=%* + +%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %* +if ERRORLEVEL 1 goto error +goto end + +:error +set ERROR_CODE=1 + +:end +@endlocal & set ERROR_CODE=%ERROR_CODE% + +if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost +@REM check for post script, once with legacy .bat ending and once with .cmd ending +if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat" +if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd" +:skipRcPost + +@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on' +if "%MAVEN_BATCH_PAUSE%" == "on" pause + +if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE% + +exit /B %ERROR_CODE% diff --git a/resilience4j/bulkhead/pom.xml b/resilience4j/bulkhead/pom.xml new file mode 100644 index 0000000..d5def06 --- /dev/null +++ b/resilience4j/bulkhead/pom.xml @@ -0,0 +1,113 @@ + + + + 4.0.0 + + io.reflectoring.resilience4j.bulkhead + bulkhead + 1.0-SNAPSHOT + + bulkhead + https://reflectoring.io + + + UTF-8 + 11 + + + + + + io.github.resilience4j + resilience4j-bulkhead + 1.5.0 + + + + + io.github.resilience4j + resilience4j-core + 1.5.0 + + + + io.github.resilience4j + resilience4j-all + 1.5.0 + + + + org.projectlombok + lombok + 1.18.12 + + + + + io.github.resilience4j + resilience4j-micrometer + 1.5.0 + + + + + io.micrometer + micrometer-core + 1.5.0 + + + + junit + junit + 4.11 + test + + + + + + + + + maven-clean-plugin + 3.1.0 + + + + maven-resources-plugin + 3.0.2 + + + maven-compiler-plugin + 3.8.0 + + + maven-surefire-plugin + 2.22.1 + + + maven-jar-plugin + 3.0.2 + + + maven-install-plugin + 2.5.2 + + + maven-deploy-plugin + 2.8.2 + + + + maven-site-plugin + 3.7.1 + + + maven-project-info-reports-plugin + 3.0.0 + + + + + diff --git a/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/Examples.java b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/Examples.java new file mode 100644 index 0000000..cb96763 --- /dev/null +++ b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/Examples.java @@ -0,0 +1,237 @@ +package io.reflectoring.resilience4j.bulkhead; + +import io.github.resilience4j.bulkhead.Bulkhead; +import io.github.resilience4j.bulkhead.BulkheadConfig; +import io.github.resilience4j.bulkhead.BulkheadRegistry; +import io.github.resilience4j.micrometer.tagged.TaggedBulkheadMetrics; +import io.micrometer.core.instrument.Meter; +import io.micrometer.core.instrument.MeterRegistry; +import io.micrometer.core.instrument.simple.SimpleMeterRegistry; +import io.reflectoring.resilience4j.bulkhead.model.Flight; +import io.reflectoring.resilience4j.bulkhead.model.SearchRequest; +import io.reflectoring.resilience4j.bulkhead.services.FlightSearchService; +import java.time.Duration; +import java.util.List; +import java.util.concurrent.CompletableFuture; +import java.util.function.Consumer; +import java.util.function.Supplier; +import java.util.stream.StreamSupport; + +public class Examples +{ + void printDefaultValues() { + BulkheadConfig config = BulkheadConfig.ofDefaults(); + System.out.println("Max concurrent calls = " + config.getMaxConcurrentCalls()); + System.out.println("Max wait duration = " + config.getMaxWaitDuration()); + System.out.println("Writable stack trace enabled = " + config.isWritableStackTraceEnabled()); + System.out.println("Fair call handling enabled = " + config.isFairCallHandlingEnabled()); + } + + void basicExample() { + BulkheadConfig config = BulkheadConfig.custom() + .maxConcurrentCalls(2) + .maxWaitDuration(Duration.ofSeconds(2)) + .build(); + BulkheadRegistry registry = BulkheadRegistry.of(config); + Bulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request); + Supplier> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<4; i++) { + CompletableFuture + .supplyAsync(decoratedFlightsSupplier) + .thenAccept(flights -> System.out.println("Received results")); + } + } + + void basicExample_BulkheadFullException() { + BulkheadConfig config = BulkheadConfig.custom() + .maxConcurrentCalls(2) + .maxWaitDuration(Duration.ofSeconds(1)) + .build(); + BulkheadRegistry registry = BulkheadRegistry.of(config); + Bulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request); + Supplier> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<3; i++) { + CompletableFuture + .supplyAsync(decoratedFlightsSupplier) + .whenComplete( (r, t) -> { + if (t != null) { + Throwable cause = t.getCause(); + if (cause != null) { + cause.printStackTrace(); + } + } + if (r != null) { + System.out.println("Received results"); + } + }); + } + } + + void bulkheadException_WithStackTraceOff() { + BulkheadConfig config = BulkheadConfig.custom() + .maxConcurrentCalls(2) + .maxWaitDuration(Duration.ofSeconds(1)) + .writableStackTraceEnabled(false) + .build(); + BulkheadRegistry registry = BulkheadRegistry.of(config); + Bulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request); + Supplier> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<3; i++) { + CompletableFuture + .supplyAsync(decoratedFlightsSupplier) + .whenComplete( (r, t) -> { + if (t != null) { + Throwable cause = t.getCause(); + if (cause != null) { + cause.printStackTrace(); + } + } + if (r != null) { + System.out.println("Received results"); + } + }); + } + + } + + void eventsExample() { + BulkheadConfig config = BulkheadConfig.custom() + .maxWaitDuration(Duration.ofMillis(500)) + .maxConcurrentCalls(3) + .build(); + + BulkheadRegistry registry = BulkheadRegistry.of(config); + Bulkhead bulkhead = registry.bulkhead("flightSearch"); + + bulkhead.getEventPublisher().onCallPermitted(e -> System.out.println(e.toString())); + bulkhead.getEventPublisher().onCallFinished(e -> System.out.println(e.toString())); + bulkhead.getEventPublisher().onCallRejected(e -> System.out.println(e.toString())); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingRandomTime(request); + Supplier> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<5; i++) { + CompletableFuture + .supplyAsync(decoratedFlightsSupplier) + .whenComplete( (r, t) -> { + if (t != null) { + t.printStackTrace(); + } + if (r != null) { + System.out.println("Received results"); + } + }); + } + } + + void metricsExample() { + BulkheadConfig config = BulkheadConfig.custom() + .maxWaitDuration(Duration.ofMillis(500)) + .maxConcurrentCalls(8) + .build(); + + BulkheadRegistry registry = BulkheadRegistry.of(config); + Bulkhead bulkhead = registry.bulkhead("flightSearchService"); + + MeterRegistry meterRegistry = new SimpleMeterRegistry(); + TaggedBulkheadMetrics.ofBulkheadRegistry(registry).bindTo(meterRegistry); + + bulkhead.getEventPublisher().onCallPermitted(e -> printMetricDetails(meterRegistry)); + bulkhead.getEventPublisher().onCallRejected(e -> printMetricDetails(meterRegistry)); + bulkhead.getEventPublisher().onCallFinished(e -> printMetricDetails(meterRegistry)); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingRandomTime(request); + Supplier> decoratedFlightsSupplier = Bulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<5; i++) { + CompletableFuture.supplyAsync(decoratedFlightsSupplier) + .whenComplete( (r, t) -> { + if (r != null) { + System.out.println("Received results"); + } + }); + } + } + + void printMetricDetails(MeterRegistry meterRegistry) { + Consumer meterConsumer = meter -> { + String desc = meter.getId().getDescription(); + String metricName = meter.getId().getName(); + Double metricValue = StreamSupport.stream(meter.measure().spliterator(), false) + .filter(m -> m.getStatistic().name().equals("VALUE")) + .findFirst() + .map(m -> m.getValue()) + .orElse(0.0); + System.out.println(desc + " - " + metricName + ": " + metricValue); + }; + meterRegistry.forEachMeter(meterConsumer); + } + + static void delay(int seconds) { + // sleep to simulate delay + try { + Thread.sleep(seconds * 1000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + } + + + + public static void main( String[] args ) + { + Examples examples = new Examples(); + System.out.println("---------------------------- printDefaultValues -------------------------------------------"); + examples.printDefaultValues(); + System.out.println("-----------------------------------------------------------------------"); + + System.out.println("---------------------------- basicExample -------------------------------------------"); + examples.basicExample(); + delay(3); + System.out.println("-----------------------------------------------------------------------"); + + System.out.println("---------------------------- basicExample_BulkheadFullException -------------------------------------------"); + examples.basicExample_BulkheadFullException(); + delay(3); + System.out.println("-----------------------------------------------------------------------"); + + System.out.println("---------------------------- bulkheadException_WithStackTraceOff -------------------------------------------"); + examples.bulkheadException_WithStackTraceOff(); + delay(10); + System.out.println("-----------------------------------------------------------------------"); + + System.out.println("---------------------------- eventsExample -------------------------------------------"); + examples.eventsExample(); + delay(5); // delay just to let the above operation complete + System.out.println("-----------------------------------------------------------------------"); + + System.out.println("---------------------------- metricsExample -------------------------------------------"); + examples.metricsExample(); + delay(15); + System.out.println("-----------------------------------------------------------------------"); + } +} \ No newline at end of file diff --git a/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/ThreadpoolBulkheadExamples.java b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/ThreadpoolBulkheadExamples.java new file mode 100644 index 0000000..bc130de --- /dev/null +++ b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/ThreadpoolBulkheadExamples.java @@ -0,0 +1,302 @@ +package io.reflectoring.resilience4j.bulkhead; + +import io.github.resilience4j.bulkhead.ThreadPoolBulkhead; +import io.github.resilience4j.bulkhead.ThreadPoolBulkheadConfig; +import io.github.resilience4j.bulkhead.ThreadPoolBulkheadRegistry; +import io.github.resilience4j.micrometer.tagged.TaggedThreadPoolBulkheadMetrics; +import io.micrometer.core.instrument.Meter; +import io.micrometer.core.instrument.MeterRegistry; +import io.micrometer.core.instrument.simple.SimpleMeterRegistry; +import io.reflectoring.resilience4j.bulkhead.model.Flight; +import io.reflectoring.resilience4j.bulkhead.model.SearchRequest; +import io.reflectoring.resilience4j.bulkhead.services.FlightSearchService; +import io.reflectoring.resilience4j.bulkhead.utils.RequestTrackingIdHolder; +import io.reflectoring.resilience4j.bulkhead.utils.RequestTrackingIdPropagator; +import java.util.List; +import java.util.UUID; +import java.util.concurrent.CompletionStage; +import java.util.function.Consumer; +import java.util.function.Supplier; +import java.util.stream.StreamSupport; + +public class ThreadpoolBulkheadExamples +{ + void printDefaultValues() { + ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.ofDefaults(); + System.out.println("Max thread pool size = " + config.getMaxThreadPoolSize()); + System.out.println("Max core thread pool size = " + config.getCoreThreadPoolSize()); + System.out.println("Keep alive duration = " + config.getKeepAliveDuration()); + System.out.println("Queue capacity = " + config.getQueueCapacity()); + } + + void basicExample() { + ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom() + .maxThreadPoolSize(2) + .coreThreadPoolSize(1) + .queueCapacity(1) + .build(); + ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config); + ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request); + Supplier>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<3; i++) { + decoratedFlightsSupplier + .get() + .whenComplete((r,t) -> { + if (r != null) { + System.out.println("Received results"); + } + if (t != null) { + t.printStackTrace(); + } + }); + } + } + + void basicExample_BulkheadFullException() { + ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom() + .maxThreadPoolSize(2) + .coreThreadPoolSize(1) + .queueCapacity(1) + .build(); + ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config); + ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "08/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request); + Supplier>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<4; i++) { + decoratedFlightsSupplier + .get() + .whenComplete((r,t) -> { + if (r != null) { + System.out.println("Received results"); + } + if (t != null) { + t.printStackTrace(); + } + }); + } + } + + void bulkheadException_WithStackTraceOff() { + ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom() + .maxThreadPoolSize(2) + .coreThreadPoolSize(1) + .queueCapacity(1) + .writableStackTraceEnabled(false) + .build(); + ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config); + ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request); + Supplier>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<4; i++) { + decoratedFlightsSupplier + .get() + .whenComplete((r,t) -> { + if (r != null) { + System.out.println("Received results"); + } + if (t != null) { + t.printStackTrace(); + } + }); + } + } + + void metricsExample() { + ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom() + .maxThreadPoolSize(5) + .coreThreadPoolSize(3) + .queueCapacity(5) + .writableStackTraceEnabled(false) + .build(); + ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config); + ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService"); + + MeterRegistry meterRegistry = new SimpleMeterRegistry(); + TaggedThreadPoolBulkheadMetrics.ofThreadPoolBulkheadRegistry(registry).bindTo(meterRegistry); + + bulkhead.getEventPublisher().onCallPermitted(e -> printMetricDetails(meterRegistry)); + bulkhead.getEventPublisher().onCallRejected(e -> printMetricDetails(meterRegistry)); + bulkhead.getEventPublisher().onCallFinished(e -> printMetricDetails(meterRegistry)); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond(request); + Supplier>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<11; i++) { + decoratedFlightsSupplier + .get() + .whenComplete((r,t) -> { + if (r != null) { + System.out.println("Received results"); + } + if (t != null) { + t.printStackTrace(); + } + }); + } + } + + void contextPropagationExample_WithoutContextPropagator() { + ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom() + .maxThreadPoolSize(2) + .coreThreadPoolSize(1) + .queueCapacity(1) + .build(); + ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config); + ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond_PrintCorrelationId(request); + Supplier>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<2; i++) { + String trackingId = UUID.randomUUID().toString(); + System.out.println("Setting trackingId " + trackingId + " on parent, main thread before calling flight search"); + RequestTrackingIdHolder.setRequestTrackingId(trackingId); + decoratedFlightsSupplier + .get() + .whenComplete((r,t) -> { + if (r != null) { + System.out.println("Received results"); + } + if (t != null) { + t.printStackTrace(); + } + }); + } + } + + + void contextPropagationExample_WithPropagation() { + ThreadPoolBulkheadConfig config = ThreadPoolBulkheadConfig.custom() + .maxThreadPoolSize(2) + .coreThreadPoolSize(1) + .queueCapacity(1) + .contextPropagator(new RequestTrackingIdPropagator()) + .build(); + ThreadPoolBulkheadRegistry registry = ThreadPoolBulkheadRegistry.of(config); + ThreadPoolBulkhead bulkhead = registry.bulkhead("flightSearchService"); + + FlightSearchService service = new FlightSearchService(); + SearchRequest request = new SearchRequest("NYC", "LAX", "09/30/2020"); + + Supplier> flightsSupplier = () -> service.searchFlightsTakingOneSecond_PrintCorrelationId(request); + Supplier>> decoratedFlightsSupplier = ThreadPoolBulkhead.decorateSupplier(bulkhead, flightsSupplier); + + for (int i=0; i<2; i++) { + String trackingId = UUID.randomUUID().toString(); + System.out.println("Setting trackingId " + trackingId + " on parent, main thread before calling flight search"); + RequestTrackingIdHolder.setRequestTrackingId(trackingId); + decoratedFlightsSupplier + .get() + .whenComplete((r,t) -> { + if (r != null) { + System.out.println("Received results"); + } + if (t != null) { + t.printStackTrace(); + } + }); + } + } + + void printMetricDetails(MeterRegistry meterRegistry) { + Consumer meterConsumer = meter -> { + String desc = meter.getId().getDescription(); + String metricName = meter.getId().getName(); + Double metricValue = StreamSupport.stream(meter.measure().spliterator(), false) + .filter(m -> m.getStatistic().name().equals("VALUE")) + .findFirst() + .map(m -> m.getValue()) + .orElse(0.0); + System.out.println(desc + " - " + metricName + ": " + metricValue); + }; + meterRegistry.forEachMeter(meterConsumer); + } + + static void delay(int seconds) { + // sleep to simulate delay + try { + Thread.sleep(seconds * 1000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + } + + public static void main( String[] args ) + { + ThreadpoolBulkheadExamples examples = new ThreadpoolBulkheadExamples(); + System.out.println("---------------------------- printDefaultValues -------------------------------------------"); + examples.printDefaultValues(); + System.out.println("-----------------------------------------------------------------------"); + + System.out.println("---------------------------- basicExample -------------------------------------------"); + examples.basicExample(); + delay(5); + System.out.println("-----------------------------------------------------------------------"); + + + System.out.println("---------------------------- basicExample_BulkheadFullException -------------------------------------------"); + try { + examples.basicExample_BulkheadFullException(); + } + catch (Exception e) { + // do nothing + } + delay(10); + System.out.println("-----------------------------------------------------------------------"); + + + System.out.println("---------------------------- bulkheadException_WithStackTraceOff -------------------------------------------"); + try { + examples.bulkheadException_WithStackTraceOff(); + } + catch (Exception e) { + // do nothing + } + delay(10); + System.out.println("-----------------------------------------------------------------------"); + + + System.out.println("---------------------------- metricsExample -------------------------------------------"); + try { + examples.metricsExample(); + } + catch (Exception e) { + + } + delay(15); + System.out.println("-----------------------------------------------------------------------"); + + + System.out.println("---------------------------- contextPropagationExample_WithoutContextPropagator -------------------------------------------"); + examples.contextPropagationExample_WithoutContextPropagator(); + System.out.println("-----------------------------------------------------------------------"); + + + System.out.println("---------------------------- contextPropagationExample_WithPropagation -------------------------------------------"); + examples.contextPropagationExample_WithPropagation(); + delay(10); + System.out.println("-----------------------------------------------------------------------"); + } +} diff --git a/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/Flight.java b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/Flight.java new file mode 100644 index 0000000..5355040 --- /dev/null +++ b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/Flight.java @@ -0,0 +1,60 @@ +package io.reflectoring.resilience4j.bulkhead.model; + +public class Flight { + String flightNumber; + String flightDate; + String from; + String to; + + public Flight() { + } + + public Flight(String flightNumber, String flightDate, String from, String to) { + this.flightNumber = flightNumber; + this.flightDate = flightDate; + this.from = from; + this.to = to; + } + + public String getFlightNumber() { + return flightNumber; + } + + public void setFlightNumber(String flightNumber) { + this.flightNumber = flightNumber; + } + + public String getFlightDate() { + return flightDate; + } + + public void setFlightDate(String flightDate) { + this.flightDate = flightDate; + } + + public String getFrom() { + return from; + } + + public void setFrom(String from) { + this.from = from; + } + + public String getTo() { + return to; + } + + public void setTo(String to) { + this.to = to; + } + + @Override + public String toString() { + return "Flight{" + + "flightNumber='" + flightNumber + '\'' + + ", flightDate='" + flightDate + '\'' + + ", from='" + from + '\'' + + ", to='" + to + '\'' + + '}'; + } +} \ No newline at end of file diff --git a/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/SearchRequest.java b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/SearchRequest.java new file mode 100644 index 0000000..e7c43fd --- /dev/null +++ b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/model/SearchRequest.java @@ -0,0 +1,25 @@ +package io.reflectoring.resilience4j.bulkhead.model; + +public class SearchRequest { + String from; + String to; + String flightDate; + + public SearchRequest(String from, String to, String flightDate) { + this.from = from; + this.to = to; + this.flightDate = flightDate; + } + + public String getFrom() { + return from; + } + + public String getTo() { + return to; + } + + public String getFlightDate() { + return flightDate; + } +} diff --git a/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/services/FlightSearchService.java b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/services/FlightSearchService.java new file mode 100644 index 0000000..1af74cb --- /dev/null +++ b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/services/FlightSearchService.java @@ -0,0 +1,70 @@ +package io.reflectoring.resilience4j.bulkhead.services; + +import io.reflectoring.resilience4j.bulkhead.model.Flight; +import io.reflectoring.resilience4j.bulkhead.model.SearchRequest; +import io.reflectoring.resilience4j.bulkhead.utils.RequestTrackingIdHolder; +import java.time.LocalDateTime; +import java.time.format.DateTimeFormatter; +import java.util.Arrays; +import java.util.List; +import java.util.Random; + +public class FlightSearchService { + Random random = new Random(); + DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS"); + + public List searchFlightsTakingRandomTime(SearchRequest request) { + long delay = random.nextInt(3000); + try { + Thread.sleep(delay); + } catch (InterruptedException e) { + e.printStackTrace(); + } + System.out.println("Searching for flights; " + + "current time = " + LocalDateTime.now().format(formatter) + + "; current thread = " + Thread.currentThread().getName()); + + List flights = Arrays.asList( + new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()), + new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo()) + ); + System.out.println("Flight search successful"); + return flights; + } + + public List searchFlightsTakingOneSecond(SearchRequest request) { + try { + Thread.sleep(1000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + System.out.println("Searching for flights; " + + "current time = " + LocalDateTime.now().format(formatter) + + "; current thread = " + Thread.currentThread().getName()); + + List flights = Arrays.asList( + new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()), + new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo()) + ); + System.out.println("Flight search successful at " + LocalDateTime.now().format(formatter)); + return flights; + } + + public List searchFlightsTakingOneSecond_PrintCorrelationId(SearchRequest request) { + try { + Thread.sleep(1000); + } catch (InterruptedException e) { + e.printStackTrace(); + } + System.out.println("Searching for flights; " + + "current time = " + LocalDateTime.now().format(formatter) + + "; current thread = " + Thread.currentThread().getName() + "; Request Tracking Id = " + RequestTrackingIdHolder.getRequestTrackingId()); + + List flights = Arrays.asList( + new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()), + new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo()) + ); + System.out.println("Flight search successful at " + LocalDateTime.now().format(formatter)); + return flights; + } +} \ No newline at end of file diff --git a/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdHolder.java b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdHolder.java new file mode 100644 index 0000000..de1e7c5 --- /dev/null +++ b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdHolder.java @@ -0,0 +1,22 @@ +package io.reflectoring.resilience4j.bulkhead.utils; + +public class RequestTrackingIdHolder { + private static ThreadLocal threadLocal = new ThreadLocal<>(); + + public static String getRequestTrackingId() { + return threadLocal.get(); + } + + public static void setRequestTrackingId(String id) { + if (threadLocal.get() != null) { + threadLocal.set(null); + threadLocal.remove(); + } + threadLocal.set(id); + } + + public static void clear() { + threadLocal.set(null); + threadLocal.remove(); + } +} \ No newline at end of file diff --git a/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdPropagator.java b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdPropagator.java new file mode 100644 index 0000000..c1ad465 --- /dev/null +++ b/resilience4j/bulkhead/src/main/java/io/reflectoring/resilience4j/bulkhead/utils/RequestTrackingIdPropagator.java @@ -0,0 +1,30 @@ +package io.reflectoring.resilience4j.bulkhead.utils; + +import io.github.resilience4j.bulkhead.ContextPropagator; +import java.util.Optional; +import java.util.function.Consumer; +import java.util.function.Supplier; + +public class RequestTrackingIdPropagator implements ContextPropagator { + @Override + public Supplier retrieve() { + System.out.println("Getting request tracking id from thread: " + Thread.currentThread().getName()); + return () -> Optional.of(RequestTrackingIdHolder.getRequestTrackingId()); + } + + @Override + public Consumer copy() { + return optional -> { + System.out.println("Setting request tracking id " + optional.get() + " on thread: " + Thread.currentThread().getName()); + optional.ifPresent(s -> RequestTrackingIdHolder.setRequestTrackingId(s.toString())); + }; + } + + @Override + public Consumer clear() { + return optional -> { + System.out.println("Clearing request tracking id on thread: " + Thread.currentThread().getName()); + optional.ifPresent(s -> RequestTrackingIdHolder.clear()); + }; + } +} \ No newline at end of file