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Merge branch 'master' into itsLucario/master

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This commit is contained in:
Tom Hombergs
2020-07-21 07:30:40 +10:00
committed by GitHub
parent 8efc1d139b 432f4ea3bc
commit 339a0db992
32 changed files with 1535 additions and 4 deletions
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4
aws/cloudformation/ecs-zero-downtime-deployment/README.md
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@@ -1,8 +1,8 @@
# Overview
![ECS in two public subnets](ecs-in-two-public-subnets.svg)
![ECS Zero Downtime Deployment](ecs-in-two-public-subnets.svg)
# Companion Blog Post
[The AWS Journey Part 2: Deploying a Docker image from the Command Line with CloudFormation](https://reflectoring.io/aws-cloudformation-deploy-docker-image/)
[The AWS Journey Part 4: Zero-Downtime Deployment with CloudFormation and ECS](https://reflectoring.io/aws-cloudformation-ecs-deployment/)

18
aws/cloudformation/ecs-zero-downtime-deployment/create-change-set.sh Executable file
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@@ -0,0 +1,18 @@
# Turning off the AWS pager so that the CLI doesn't open an editor for each command result
export AWS_PAGER=""
aws cloudformation create-change-set \
--change-set-name update-reflectoring-ecs-zero-downtime-deployment-service \
--stack-name reflectoring-ecs-zero-downtime-deployment-service \
--use-previous-template \
--parameters \
ParameterKey=StackName,ParameterValue=reflectoring-ecs-zero-downtime-deployment-network \
ParameterKey=ServiceName,ParameterValue=reflectoring-hello-world \
ParameterKey=ImageUrl,ParameterValue=docker.io/reflectoring/aws-hello-world:v4 \
ParameterKey=ContainerPort,ParameterValue=8080 \
ParameterKey=HealthCheckPath,ParameterValue=/hello \
ParameterKey=HealthCheckIntervalSeconds,ParameterValue=90
aws cloudformation describe-change-set \
--stack-name reflectoring-ecs-zero-downtime-deployment-service \
--change-set-name update-reflectoring-ecs-zero-downtime-deployment-service

2
aws/cloudformation/ecs-zero-downtime-deployment/create.sh Normal file → Executable file
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@@ -14,7 +14,7 @@ aws cloudformation create-stack \
--parameters \
ParameterKey=StackName,ParameterValue=reflectoring-ecs-zero-downtime-deployment-network \
ParameterKey=ServiceName,ParameterValue=reflectoring-hello-world \
ParameterKey=ImageUrl,ParameterValue=docker.io/reflectoring/aws-hello-world:latest \
ParameterKey=ImageUrl,ParameterValue=docker.io/reflectoring/aws-hello-world:v3 \
ParameterKey=ContainerPort,ParameterValue=8080 \
ParameterKey=HealthCheckPath,ParameterValue=/hello \
ParameterKey=HealthCheckIntervalSeconds,ParameterValue=90

0
aws/cloudformation/ecs-zero-downtime-deployment/delete.sh Normal file → Executable file
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8
aws/cloudformation/ecs-zero-downtime-deployment/execute-change-set.sh Executable file
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@@ -0,0 +1,8 @@
# Turning off the AWS pager so that the CLI doesn't open an editor for each command result
export AWS_PAGER=""
aws cloudformation execute-change-set \
--stack-name reflectoring-ecs-zero-downtime-deployment-service \
--change-set-name update-reflectoring-ecs-zero-downtime-deployment-service
aws cloudformation wait stack-update-complete --stack-name reflectoring-ecs-zero-downtime-deployment-service

2
aws/cloudformation/ecs-zero-downtime-deployment/service.yml
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@@ -100,7 +100,7 @@ Resources:
Memory: !Ref 'ContainerMemory'
Image: !Ref 'ImageUrl'
PortMappings:
- ContainerPort: !Ref 'ContainerPort' serve
- ContainerPort: !Ref 'ContainerPort'
LogConfiguration:
LogDriver: 'awslogs'
Options:

17
aws/cloudformation/ecs-zero-downtime-deployment/update.sh Executable file
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@@ -0,0 +1,17 @@
# Turning off the AWS pager so that the CLI doesn't open an editor for each command result
export AWS_PAGER=""
IMAGE_URL=$1
aws cloudformation update-stack \
--stack-name reflectoring-ecs-zero-downtime-deployment-service \
--use-previous-template \
--parameters \
ParameterKey=StackName,ParameterValue=reflectoring-ecs-zero-downtime-deployment-network \
ParameterKey=ServiceName,ParameterValue=reflectoring-hello-world \
ParameterKey=ImageUrl,ParameterValue=$IMAGE_URL \
ParameterKey=ContainerPort,ParameterValue=8080 \
ParameterKey=HealthCheckPath,ParameterValue=/hello \
ParameterKey=HealthCheckIntervalSeconds,ParameterValue=90
aws cloudformation wait stack-update-complete --stack-name reflectoring-ecs-zero-downtime-deployment-service

1
build-all.sh
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@@ -82,6 +82,7 @@ build_maven_module() {
}
build_maven_module "spring-boot/spring-boot-kafka"
build_maven_module "resilience4j/retry"
build_maven_module "solid/lsp"
run_gradle_task "spring-boot/thymeleaf-vue" "npmInstall"
build_gradle_module "spring-boot/thymeleaf-vue"

117
resilience4j/retry/.mvn/wrapper/MavenWrapperDownloader.java vendored Normal file
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@@ -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();
}
}

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resilience4j/retry/.mvn/wrapper/maven-wrapper.jar vendored Normal file
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resilience4j/retry/.mvn/wrapper/maven-wrapper.properties vendored Normal file
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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

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resilience4j/retry/Readme.md Normal file
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@@ -0,0 +1 @@
Run the Examples program

310
resilience4j/retry/mvnw vendored Executable file
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@@ -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} $MAVEN_CONFIG "$@"

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resilience4j/retry/mvnw.cmd vendored Normal file
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@@ -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%

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resilience4j/retry/pom.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>io.reflectoring.resilience4j.retry</groupId>
<artifactId>retry</artifactId>
<version>1.0-SNAPSHOT</version>
<name>retry</name>
<url>http://www.reflectoring.io</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-retry -->
<dependency>
<groupId>io.github.resilience4j</groupId>
<artifactId>resilience4j-retry</artifactId>
<version>1.5.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-core -->
<dependency>
<groupId>io.github.resilience4j</groupId>
<artifactId>resilience4j-core</artifactId>
<version>1.5.0</version>
</dependency>
<dependency>
<groupId>io.github.resilience4j</groupId>
<artifactId>resilience4j-all</artifactId>
<version>1.5.0</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-micrometer -->
<dependency>
<groupId>io.github.resilience4j</groupId>
<artifactId>resilience4j-micrometer</artifactId>
<version>1.5.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/io.micrometer/micrometer-core -->
<dependency>
<groupId>io.micrometer</groupId>
<artifactId>micrometer-core</artifactId>
<version>1.5.0</version>
</dependency>
</dependencies>
<build>
<pluginManagement><!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<!-- clean lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#clean_Lifecycle -->
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- default lifecycle, jar packaging: see https://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_jar_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-jar-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
<!-- site lifecycle, see https://maven.apache.org/ref/current/maven-core/lifecycles.html#site_Lifecycle -->
<plugin>
<artifactId>maven-site-plugin</artifactId>
<version>3.7.1</version>
</plugin>
<plugin>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>3.0.0</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>

350
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/Examples.java Normal file
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package io.reflectoring.resilience4j.retry;
import static java.time.temporal.ChronoUnit.SECONDS;
import io.github.resilience4j.core.IntervalFunction;
import io.github.resilience4j.micrometer.tagged.TaggedRetryMetrics;
import io.github.resilience4j.retry.Retry;
import io.github.resilience4j.retry.RetryConfig;
import io.github.resilience4j.retry.RetryRegistry;
import io.micrometer.core.instrument.Meter;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
import io.reflectoring.resilience4j.retry.exceptions.FlightServiceBaseException;
import io.reflectoring.resilience4j.retry.exceptions.RateLimitExceededException;
import io.reflectoring.resilience4j.retry.exceptions.SeatsUnavailableException;
import io.reflectoring.resilience4j.retry.model.BookingRequest;
import io.reflectoring.resilience4j.retry.model.BookingResponse;
import io.reflectoring.resilience4j.retry.model.Flight;
import io.reflectoring.resilience4j.retry.model.SearchRequest;
import io.reflectoring.resilience4j.retry.model.SearchResponse;
import io.reflectoring.resilience4j.retry.services.FlightBookingService;
import io.reflectoring.resilience4j.retry.services.FlightSearchService;
import io.reflectoring.resilience4j.retry.services.failures.FailHalfTheTime;
import io.reflectoring.resilience4j.retry.services.failures.FailNTimes;
import io.reflectoring.resilience4j.retry.services.failures.RateLimitFailNTimes;
import io.vavr.CheckedFunction0;
import java.time.Duration;
import java.util.Collections;
import java.util.List;
import java.util.UUID;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.Executors;
import java.util.concurrent.ScheduledExecutorService;
import java.util.function.Consumer;
import java.util.function.Predicate;
import java.util.function.Supplier;
import java.util.stream.StreamSupport;
public class Examples {
void generalUsagePattern() {
RetryConfig config = RetryConfig.ofDefaults(); // ----> 1
RetryRegistry registry = RetryRegistry.of(config); // ----> 2
Retry retry = registry.retry("flightSearchService", config); // ----> 3
FlightSearchService service = new FlightSearchService();
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
Supplier<List<Flight>> flightSearchSupplier = () -> service.searchFlights(request); // ----> 4
Supplier<List<Flight>> retryingFlightSearch = Retry.decorateSupplier(retry, flightSearchSupplier); // ----> 5
System.out.println(retryingFlightSearch.get()); // ----> 6
}
void basicExample() {
RetryConfig config = RetryConfig.custom().maxAttempts(3).waitDuration(Duration.of(2, SECONDS)).build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new FailNTimes(1));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
Supplier<List<Flight>> flightSearchSupplier = () -> service.searchFlights(request);
Supplier<List<Flight>> retryingFlightSearch = Retry.decorateSupplier(retry, flightSearchSupplier);
System.out.println(retryingFlightSearch.get());
}
void basicExample_ServiceThrowingException_v1() {
RetryConfig config = RetryConfig.custom().maxAttempts(3).build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new FailNTimes(1));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
Supplier<List<Flight>> flightSearchSupplier = () -> {
try {
return service.searchFlightsThrowingException(request);
} catch (Exception e) {
// handle exception
}
return Collections.emptyList();
};
Supplier<List<Flight>> retryingFlightSearch = Retry.decorateSupplier(retry, flightSearchSupplier);
System.out.println(retryingFlightSearch.get());
}
void basicExample_ServiceThrowingException_v2() {
RetryConfig config = RetryConfig.custom().maxAttempts(3).build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new FailNTimes(1));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
CheckedFunction0<List<Flight>> retryingFlightSearch = Retry.decorateCheckedSupplier(retry, () -> service.searchFlightsThrowingException(request));
try {
System.out.println(retryingFlightSearch.apply());
} catch (Throwable throwable) {
// handle exception
}
}
void predicateExample() {
RetryConfig config = RetryConfig.<SearchResponse>custom().
maxAttempts(3).
waitDuration(Duration.of(3, SECONDS)).
retryOnResult(searchResponse -> searchResponse.getErrorCode().equals("FS-167")).
build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
FlightSearchService service = new FlightSearchService();
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
CheckedFunction0<SearchResponse> retryingFlightSearch = Retry.decorateCheckedSupplier(retry, () -> service.httpSearchFlights(request));
SearchResponse response;
try {
response = retryingFlightSearch.apply();
System.out.println(response);
} catch (Throwable throwable) {
// handle exception
}
}
void retryExceptionsIgnoreExceptionsExample() {
RetryConfig config = RetryConfig.custom().
maxAttempts(3).
waitDuration(Duration.of(3, SECONDS)).
retryExceptions(FlightServiceBaseException.class).
ignoreExceptions(SeatsUnavailableException.class).
build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightBookService", config);
FlightBookingService service = new FlightBookingService();
System.out.println("Example to illustrate: rate limit runtime exception - will be retried");
// rate limit exception
service.setPotentialFailure(new RateLimitFailNTimes(2));
Flight flight = new Flight("XY 213", "07/30/2020", "NYC", "LAX");
BookingRequest request = new BookingRequest(UUID.randomUUID().toString(), flight, 2, "C");
Supplier<BookingResponse> bookingResponseSupplier = () -> service.bookFlight(request);
Supplier<BookingResponse> bookingResponse = Retry.decorateSupplier(retry, bookingResponseSupplier);
try {
System.out.println(bookingResponse.get());
}
catch (RateLimitExceededException rle) {
rle.printStackTrace();
}
System.out.println("Example to illustrate: no seats available runtime exception will not be retried");
// seats not available checked exception
FlightBookingService service2 = new FlightBookingService();
Flight flight2 = new Flight("XY 765", "07/30/2020", "NYC", "LAX");
BookingRequest request2 = new BookingRequest(UUID.randomUUID().toString(), flight2, 2, "C");
CheckedFunction0<BookingResponse> bookingResponseSupplier2 = () -> service2.bookFlight(request2);
CheckedFunction0<BookingResponse> bookingResponse2 = Retry.decorateCheckedSupplier(retry, bookingResponseSupplier2);
try {
System.out.println(bookingResponse2.apply());
}
catch (Throwable e) {
e.printStackTrace();
}
}
void intervalFunction_Random() {
RetryConfig config = RetryConfig.custom().
maxAttempts(4).
intervalFunction(IntervalFunction.ofRandomized(2000)).
build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new FailNTimes(3));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
Supplier<List<Flight>> flightSearchSupplier = () -> service.searchFlights(request);
Supplier<List<Flight>> retryingFlightSearch = Retry.decorateSupplier(retry, flightSearchSupplier);
System.out.println(retryingFlightSearch.get());
}
void intervalFunction_Exponential() {
RetryConfig config = RetryConfig.custom().
maxAttempts(6).
intervalFunction(IntervalFunction.ofExponentialBackoff(1000, 2)).
build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new FailNTimes(5));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
Supplier<List<Flight>> flightSearchSupplier = () -> service.searchFlights(request);
Supplier<List<Flight>> retryingFlightSearch = Retry.decorateSupplier(retry, flightSearchSupplier);
System.out.println(retryingFlightSearch.get());
}
void asyncRetryExample() {
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new FailNTimes(4));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
RetryConfig config = RetryConfig.custom().maxAttempts(5).waitDuration(Duration.of(1, SECONDS)).build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
ScheduledExecutorService scheduler = Executors.newSingleThreadScheduledExecutor();
Supplier<CompletionStage<List<Flight>>> completionStageSupplier = () -> CompletableFuture.supplyAsync(() -> service.searchFlights(request));
retry.executeCompletionStage(scheduler, completionStageSupplier).thenAccept(System.out::println);
// Sleep a few seconds to let the other thread complete
try {
Thread.sleep(10000);
} catch (InterruptedException e) {
e.printStackTrace();
}
scheduler.shutdown();
}
void retryEventsExample() {
RetryConfig config = RetryConfig.custom().maxAttempts(3).waitDuration(Duration.of(1, SECONDS)).build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
Retry.EventPublisher publisher = retry.getEventPublisher();
publisher.onRetry(event -> System.out.println(event.toString()));
publisher.onSuccess(event -> System.out.println(event.toString()));
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new RateLimitFailNTimes(2));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
List<Flight> flights = retry.executeSupplier(() -> service.searchFlights(request));
System.out.println(flights);
}
void retryOnException() {
Predicate<Throwable> rateLimitPredicate = rle -> (rle instanceof RateLimitExceededException)
&& "RL-101".equals(((RateLimitExceededException) rle).getErrorCode());
RetryConfig config = RetryConfig.custom().
maxAttempts(3).
waitDuration(Duration.of(1, SECONDS)).
retryOnException(rateLimitPredicate).
build();
RetryRegistry registry = RetryRegistry.of(config);
Retry retry = registry.retry("flightSearchService", config);
FlightSearchService service = new FlightSearchService();
service.setPotentialFailure(new RateLimitFailNTimes(2));
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
List<Flight> flights = retry.executeSupplier(() -> service.searchFlights(request));
System.out.println(flights);
}
void retryMetrics() {
RetryConfig config = RetryConfig.custom().maxAttempts(3).build();
RetryRegistry retryRegistry = RetryRegistry.of(config);
Retry retry = retryRegistry.retry("flightSearchService", config);
MeterRegistry meterRegistry = new SimpleMeterRegistry();
TaggedRetryMetrics.ofRetryRegistry(retryRegistry).bindTo(meterRegistry);
FlightSearchService service = new FlightSearchService();
SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2020");
Supplier<List<Flight>> flights = Retry.decorateSupplier(retry, () -> service.searchFlights(request));
for (int i=0; i<10; i++) {
service.setPotentialFailure(new FailHalfTheTime(2));
System.out.println(flights.get());
}
Consumer<Meter> meterConsumer = meter -> {
String desc = meter.getId().getDescription();
String metricName = meter.getId().getTag("kind");
Double metricValue = StreamSupport.stream(meter.measure().spliterator(), false).
filter(m -> m.getStatistic().name().equals("COUNT")).
findFirst().
map(m -> m.getValue()).
orElse(0.0);
System.out.println(desc + " - " + metricName + ": " + metricValue);
};
meterRegistry.forEachMeter(meterConsumer);
}
public static void main(String[] args) {
Examples examples = new Examples();
System.out.println("------------------------ generalUsagePattern ----------------------------------------------");
examples.generalUsagePattern();
System.out.println("----------------------------------------------------------------------");
System.out.println("------------------------- basicExample ---------------------------------------------");
examples.basicExample();
System.out.println("----------------------------------------------------------------------");
System.out.println("------------------------- basicExample_ServiceThrowingException_v1 ---------------------------------------------");
examples.basicExample_ServiceThrowingException_v1();
System.out.println("----------------------------------------------------------------------");
System.out.println("-------------------------- basicExample_ServiceThrowingException_v2 --------------------------------------------");
examples.basicExample_ServiceThrowingException_v2();
System.out.println("----------------------------------------------------------------------");
System.out.println("--------------------------- predicateExample -------------------------------------------");
examples.predicateExample();
System.out.println("----------------------------------------------------------------------");
System.out.println("---------------------------- retryExceptionsIgnoreExceptionsExample ------------------------------------------");
examples.retryExceptionsIgnoreExceptionsExample();
System.out.println("----------------------------------------------------------------------");
System.out.println("---------------------------- intervalFunction_Random ------------------------------------------");
examples.intervalFunction_Random();
System.out.println("----------------------------------------------------------------------");
System.out.println("----------------------------- intervalFunction_Exponential -----------------------------------------");
examples.intervalFunction_Exponential();
System.out.println("----------------------------------------------------------------------");
System.out.println("----------------------------- asyncRetryExample -----------------------------------------");
examples.asyncRetryExample();
System.out.println("----------------------------------------------------------------------");
System.out.println("----------------------------- retryEventsExample -----------------------------------------");
examples.retryEventsExample();
System.out.println("----------------------------------------------------------------------");
System.out.println("------------------------------ retryOnException ----------------------------------------");
examples.retryOnException();
System.out.println("----------------------------------------------------------------------");
System.out.println("------------------------------- retryMetrics ---------------------------------------");
examples.retryMetrics();
System.out.println("----------------------------------------------------------------------");
}
}

7
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/exceptions/FlightServiceBaseException.java Normal file
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package io.reflectoring.resilience4j.retry.exceptions;
public class FlightServiceBaseException extends RuntimeException {
public FlightServiceBaseException(String message) {
super(message);
}
}

14
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/exceptions/RateLimitExceededException.java Normal file
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package io.reflectoring.resilience4j.retry.exceptions;
public class RateLimitExceededException extends FlightServiceBaseException {
String errorCode;
public RateLimitExceededException(String message, String errorCode) {
super(message);
this.errorCode = errorCode;
}
public String getErrorCode() {
return errorCode;
}
}

7
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/exceptions/SeatsUnavailableException.java Normal file
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package io.reflectoring.resilience4j.retry.exceptions;
public class SeatsUnavailableException extends FlightServiceBaseException {
public SeatsUnavailableException(String message) {
super(message);
}
}

47
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/model/BookingRequest.java Normal file
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package io.reflectoring.resilience4j.retry.model;
public class BookingRequest {
String requestId;
Flight flight;
int seatCount;
String seatClass;
public BookingRequest(String requestId, Flight flight, int seatCount, String seatClass) {
this.requestId = requestId;
this.flight = flight;
this.seatCount = seatCount;
this.seatClass = seatClass;
}
public String getRequestId() {
return requestId;
}
public void setRequestId(String requestId) {
this.requestId = requestId;
}
public Flight getFlight() {
return flight;
}
public void setFlight(Flight flight) {
this.flight = flight;
}
public int getSeatCount() {
return seatCount;
}
public void setSeatCount(int seatCount) {
this.seatCount = seatCount;
}
public String getSeatClass() {
return seatClass;
}
public void setSeatClass(String seatClass) {
this.seatClass = seatClass;
}
}

24
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/model/BookingResponse.java Normal file
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@@ -0,0 +1,24 @@
package io.reflectoring.resilience4j.retry.model;
public class BookingResponse {
String status;
public BookingResponse(String status) {
this.status = status;
}
public String getStatus() {
return status;
}
public void setStatus(String status) {
this.status = status;
}
@Override
public String toString() {
return "BookingResponse{" +
"status='" + status + '\'' +
'}';
}
}

60
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/model/Flight.java Normal file
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package io.reflectoring.resilience4j.retry.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 + '\'' +
'}';
}
}

25
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/model/SearchRequest.java Normal file
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package io.reflectoring.resilience4j.retry.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;
}
}

32
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/model/SearchResponse.java Normal file
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package io.reflectoring.resilience4j.retry.model;
import java.util.List;
public class SearchResponse {
String errorCode;
List<Flight> flights;
public String getErrorCode() {
return errorCode;
}
public void setErrorCode(String errorCode) {
this.errorCode = errorCode;
}
public List<Flight> getFlights() {
return flights;
}
public void setFlights(List<Flight> flights) {
this.flights = flights;
}
@Override
public String toString() {
return "SearchResponse{" +
"errorCode='" + errorCode + '\'' +
", flights=" + flights +
'}';
}
}

31
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/FlightBookingService.java Normal file
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package io.reflectoring.resilience4j.retry.services;
import io.reflectoring.resilience4j.retry.exceptions.SeatsUnavailableException;
import io.reflectoring.resilience4j.retry.model.BookingRequest;
import io.reflectoring.resilience4j.retry.model.BookingResponse;
import io.reflectoring.resilience4j.retry.services.failures.NoFailure;
import io.reflectoring.resilience4j.retry.services.failures.PotentialFailure;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
public class FlightBookingService {
PotentialFailure potentialFailure = new NoFailure();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS");
public BookingResponse bookFlight(BookingRequest request) throws SeatsUnavailableException {
System.out.println("Booking flight; current time = " + LocalDateTime.now().format(formatter));
potentialFailure.occur();
if (request.getFlight().getFlightNumber().contains("765")) {
potentialFailure.occur();
throw new SeatsUnavailableException("No seats available");
}
// book seats on flight
System.out.println("Flight booking successful");
return new BookingResponse("success");
}
public void setPotentialFailure(PotentialFailure potentialFailure) {
this.potentialFailure = potentialFailure;
}
}

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resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/FlightSearchService.java Normal file
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package io.reflectoring.resilience4j.retry.services;
import io.reflectoring.resilience4j.retry.model.Flight;
import io.reflectoring.resilience4j.retry.model.SearchRequest;
import io.reflectoring.resilience4j.retry.model.SearchResponse;
import io.reflectoring.resilience4j.retry.services.failures.NoFailure;
import io.reflectoring.resilience4j.retry.services.failures.PotentialFailure;
import java.io.IOException;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
public class FlightSearchService {
PotentialFailure potentialFailure = new NoFailure();
DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS");
public List<Flight> searchFlights(SearchRequest request) {
System.out.println("Searching for flights; current time = " + LocalDateTime.now().format(formatter));
potentialFailure.occur();
List<Flight> flights = Arrays.asList(
new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
new Flight("XY 781", request.getFlightDate(), request.getFrom(), request.getTo()),
new Flight("XY 732", request.getFlightDate(), request.getFrom(), request.getTo()),
new Flight("XY 746", request.getFlightDate(), request.getFrom(), request.getTo())
);
System.out.println("Flight search successful");
return flights;
}
public List<Flight> searchFlightsThrowingException(SearchRequest request) throws Exception {
System.out.println("Searching for flights; current time = " + LocalDateTime.now().format(formatter));
throw new Exception("Exception when searching for flights");
}
public void setPotentialFailure(PotentialFailure potentialFailure) {
this.potentialFailure = potentialFailure;
}
public SearchResponse httpSearchFlights(SearchRequest request) throws IOException {
System.out.println("Searching for flights; current time = " + LocalDateTime.now().format(formatter));
potentialFailure.occur();
String date = request.getFlightDate();
String from = request.getFrom();
String to = request.getTo();
if (request.getFlightDate().equals("07/25/2020")) { // Simulating an error scenario
System.out.println("Flight data initialization in progress, cannot search at this time");
SearchResponse response = new SearchResponse();
response.setErrorCode("FS-167");
response.setFlights(Collections.emptyList());
return response;
}
List<Flight> flights = Arrays.asList(
new Flight("XY 765", date, from, to),
new Flight("XY 781", date, from, to),
new Flight("XY 732", date, from, to),
new Flight("XY 746", date, from, to)
);
System.out.println("Flight search successful");
SearchResponse response = new SearchResponse();
response.setFlights(flights);
return response;
}
}

25
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/failures/FailHalfTheTime.java Normal file
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package io.reflectoring.resilience4j.retry.services.failures;
import java.util.Random;
public class FailHalfTheTime implements PotentialFailure {
Random random = new Random();
int times;
int failedCount;
public FailHalfTheTime(int times) {
this.times = times;
}
@Override
public void occur() {
if (failedCount++ < times && random.nextInt() % 2 == 0) {
throw new RuntimeException("Operation failed");
}
}
public static void main(String[] args) {
PotentialFailure failure = new FailHalfTheTime(4);
failure.occur();
}
}

18
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/failures/FailNTimes.java Normal file
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package io.reflectoring.resilience4j.retry.services.failures;
public class FailNTimes implements PotentialFailure {
int times;
int failedCount;
public FailNTimes(int times) {
this.times = times;
}
@Override
public void occur() {
if (failedCount++ < times) {
System.out.println("Operation failed");
throw new RuntimeException("Operation failed");
}
}
}

7
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/failures/NoFailure.java Normal file
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package io.reflectoring.resilience4j.retry.services.failures;
public class NoFailure implements PotentialFailure {
@Override
public void occur() {
}
}

5
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/failures/PotentialFailure.java Normal file
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package io.reflectoring.resilience4j.retry.services.failures;
public interface PotentialFailure {
void occur();
}

20
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/failures/RateLimitFailNTimes.java Normal file
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package io.reflectoring.resilience4j.retry.services.failures;
import io.reflectoring.resilience4j.retry.exceptions.RateLimitExceededException;
public class RateLimitFailNTimes implements PotentialFailure {
int times;
int failedCount;
public RateLimitFailNTimes(int times) {
this.times = times;
}
@Override
public void occur() {
if (failedCount++ < times) {
System.out.println("Rate limit exceeded");
throw new RateLimitExceededException("Rate limit exceeded, try again in some time", "RL-101");
}
}
}

20
resilience4j/retry/src/main/java/io/reflectoring/resilience4j/retry/services/failures/SeatsUnavailableFailureNTimes.java Normal file
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package io.reflectoring.resilience4j.retry.services.failures;
import io.reflectoring.resilience4j.retry.exceptions.SeatsUnavailableException;
public class SeatsUnavailableFailureNTimes implements PotentialFailure {
int times;
int failedCount;
public SeatsUnavailableFailureNTimes(int times) {
this.times = times;
}
@Override
public void occur() {
if (failedCount++ < times) {
System.out.println("Seats not available");
throw new SeatsUnavailableException("Seats not available");
}
}
}