code example for structured logging

Merge branch 'master' into zero-downtime
# Conflicts: # build-all.sh
2021-08-16 20:22:15 +10:00 · 2021-08-04 06:41:55 +10:00 · 2021-08-04 06:35:11 +10:00 · 2021-08-04 06:33:55 +10:00 · 2021-08-04 06:33:14 +10:00 · 2021-07-31 12:37:06 +10:00
86 changed files with 5432 additions and 6 deletions
--- a/build-all.sh
+++ b/build-all.sh
@@ -86,10 +86,13 @@ if [[ "$MODULE" == "module6" ]]
 then
  # ADD NEW MODULES HERE
  # (add new modules above the rest so you get quicker feedback if it fails)
  build_maven_module "logging/structured-logging"
  build_maven_module "spring-boot/zero-downtime"
  build_maven_module "resilience4j/springboot-resilience4j"
  build_maven_module "spring-boot/feature-flags"
-  build maven_module "aws/springcloudses"
+  build_maven_module  "aws/springcloudses"
  build_gradle_module "aws/spring-cloud-caching-redis"
-  build maven_module "spring-boot/spring-boot-camel"
+  build_maven_module "spring-boot/spring-boot-camel"
  build_maven_module "logging/spring-boot"
  build_maven_module "logging/logback"
  build_maven_module "logging/log4j"
@@ -102,7 +105,7 @@ fi
 if [[ "$MODULE" == "module5" ]]
 then
-  build maven_module "aws/aws-dynamodb"
+  build_maven_module "aws/aws-dynamodb"
  build_maven_module "spring-boot/spring-boot-testconfiguration"
  build_maven_module "aws/springcloudrds"
  build_maven_module "aws/springcloudsqs"
--- a/cors/README.md
+++ b/cors/README.md
@@ -0,0 +1,3 @@
 # Related Blog Posts
 * [Complete guide to CORS](https://reflectoring.io/complete-guide-to-cors/)
--- a/cors/ecommapp/index.html
+++ b/cors/ecommapp/index.html
@@ -0,0 +1,67 @@
 <!DOCTYPE html>
 <html>
    <head>
        <script>
            function load(domainURL) {
                var xhttp = new XMLHttpRequest();
                xhttp.onreadystatechange = function() {
                    if (this.readyState == 4 && this.status == 200) {
                    document.getElementById("demo").innerHTML = this.responseText;
                    }
                };
                xhttp.open("GET", domainURL, true);
                xhttp.send();
            }                     
            function loadFromSameOrigin() {
                load("http://localhost:9000/orders")
            }  
            function loadFromCrossOrigin() {
                load("http://localhost:8000/orders")
            }  
            function updateInCrossOrigin() {
                var xhttp = new XMLHttpRequest();
                xhttp.onreadystatechange = function() {
                    if (this.readyState == 4 && this.status == 200) {
                      document.getElementById("demo").innerHTML = this.responseText;
                    }
                };
                var data = {};
                xhttp.open("PUT", "http://localhost:8000/orders", true);
                xhttp.setRequestHeader('Content-type','application/json; charset=utf-8');
                xhttp.send(JSON.stringify(data));
            } 
            function sendAuthRequestToCrossOrigin() {
                var xhr = new XMLHttpRequest();
                xhr.onreadystatechange = function() {
                    if (this.readyState == 4 && this.status == 200) {
                      document.getElementById("demo").innerHTML = this.responseText;
                    }
                };
                xhr.open('GET', "http://localhost:8000/orders", true);
                xhr.setRequestHeader('Authorization', 'Bearer rtikkjhgffw456tfdd');
                xhr.withCredentials = true;
                xhr.send();
            }
        </script>
    </head>
 <body>
 <div id="demo">
  <h2>Order Processing</h2>
  <div><button type="button" onclick="loadFromSameOrigin()">Fetch Orders from same Origin</button></div><br/><br/>
  <div><button type="button" onclick="loadFromCrossOrigin()">Fetch Orders from different Origin (Cross Origin)</button></div><br/><br/>
  <div><button type="button" onclick="updateInCrossOrigin()">Update Orders from different Origin (Cross Origin)</button></div><br/><br/>
  <div><button type="button" onclick="sendAuthRequestToCrossOrigin()">Request Orders from authenticated user (Cross Origin)</button></div>
 </div>
 </body>
 </html>
--- a/cors/ecommapp/package-lock.json
+++ b/cors/ecommapp/package-lock.json
@@ -0,0 +1,859 @@
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 }
--- a/cors/ecommapp/package.json
+++ b/cors/ecommapp/package.json
@@ -0,0 +1,16 @@
 {
  "name": "ecommapp",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.19.0",
    "express": "^4.17.1"
  }
 }
--- a/cors/ecommapp/server.js
+++ b/cors/ecommapp/server.js
@@ -0,0 +1,51 @@
 const express = require('express');
 const router = express.Router();
 const path = require('path');
 const bodyParser = require('body-parser');
 const port = 9000;
 const app = express();
 app.use(bodyParser.json());
 router.get('/',function(req,res){
  res.sendFile(path.join(__dirname+'/index.html'));
 });
 app.use('/', router);
 const orders = [
 {
  id: 1,
  item: "Television",
  units: 1,
  price: 2345.67
 },
 {
  id: 2,
  item: "Washing Machine",
  units: 3,
  price: 23.34
 },
 {
  id: 3,
  item: "Laptop",
  units: 1,
  price: 23455.34
 }
 ];
 app.get('/orders', (req, res) => {
  console.log('Returning orders');
  res.send(orders);
 });
 app.put('/orders', (req, res) => {
  console.log('updating orders');
  res.send(orders);
 });
 console.log("Server listening on port "+port);
 app.listen(port);
--- a/cors/orderprocessor/index.html
+++ b/cors/orderprocessor/index.html
@@ -0,0 +1,36 @@
 <!DOCTYPE html>
 <html>
    <head>
        <script>
            function load(domainURL) {
                var xhttp = new XMLHttpRequest();
                xhttp.onreadystatechange = function() {
                    if (this.readyState == 4 && this.status == 200) {
                    document.getElementById("demo").innerHTML = this.responseText;
                    }
                };
                xhttp.open("GET", domainURL, true);
                xhttp.send();
            }                     
            function loadFromSameDomain() {
                load("http://localhost:8001/orders")
            }  
            function loadFromCrossDomain() {
                load("http://localhost:8000/orders")
            }  
        </script>
    </head>
 <body>
 <div id="demo">
  <h2>Order Processing</h2>
  <div><button type="button" onclick="loadFromSameDomain()">Fetch Orders from same domain</button></div><br/><br/>
  <div><button type="button" onclick="loadFromCrossDomain()">Fetch Orders from different domain (Cross Domain)</button></div>
 </div>
 </body>
 </html>
--- a/cors/orderprocessor/package-lock.json
+++ b/cors/orderprocessor/package-lock.json
@@ -0,0 +1,859 @@
 {
  "name": "ecommapp",
  "version": "1.0.0",
  "lockfileVersion": 2,
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      "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI="
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        "type-is": "~1.6.17"
      },
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      "resolved": "https://registry.npmjs.org/statuses/-/statuses-1.5.0.tgz",
      "integrity": "sha1-Fhx9rBd2Wf2YEfQ3cfqZOBR4Yow="
    },
    "toidentifier": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/toidentifier/-/toidentifier-1.0.0.tgz",
      "integrity": "sha512-yaOH/Pk/VEhBWWTlhI+qXxDFXlejDGcQipMlyxda9nthulaxLZUNcUqFxokp0vcYnvteJln5FNQDRrxj3YcbVw=="
    },
    "type-is": {
      "version": "1.6.18",
      "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",
      "integrity": "sha512-TkRKr9sUTxEH8MdfuCSP7VizJyzRNMjj2J2do2Jr3Kym598JVdEksuzPQCnlFPW4ky9Q+iA+ma9BGm06XQBy8g==",
      "requires": {
        "media-typer": "0.3.0",
        "mime-types": "~2.1.24"
      }
    },
    "unpipe": {
      "version": "1.0.0",
      "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
    },
    "utils-merge": {
      "version": "1.0.1",
      "resolved": "https://registry.npmjs.org/utils-merge/-/utils-merge-1.0.1.tgz",
      "integrity": "sha1-n5VxD1CiZ5R7LMwSR0HBAoQn5xM="
    },
    "vary": {
      "version": "1.1.2",
      "resolved": "https://registry.npmjs.org/vary/-/vary-1.1.2.tgz",
      "integrity": "sha1-IpnwLG3tMNSllhsLn3RSShj2NPw="
    }
  }
 }
--- a/cors/orderprocessor/package.json
+++ b/cors/orderprocessor/package.json
@@ -0,0 +1,16 @@
 {
  "name": "ecommapp",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.19.0",
    "express": "^4.17.1"
  }
 }
--- a/cors/orderprocessor/server.js
+++ b/cors/orderprocessor/server.js
@@ -0,0 +1,64 @@
 const express = require('express');
 const router = express.Router();
 const path = require('path');
 const bodyParser = require('body-parser');
 const port = 8000;
 const app = express();
 app.use(bodyParser.json());
 router.get('/',function(req,res){
  res.sendFile(path.join(__dirname+'/index.html'));
 });
 app.use('/', router);
 const orders = [
 {
  id: 1,
  item: "Television",
  units: 1,
  price: 2345.67
 },
 {
  id: 2,
  item: "Washing Machine",
  units: 3,
  price: 23.34
 },
 {
  id: 3,
  item: "Laptop",
  units: 1,
  price: 23455.34
 }
 ];
 app.use(function(req, res, next) {
  res.header("Access-Control-Allow-Origin", "http://localhost:9000");
  res.header(
    "Access-Control-Allow-Headers",
    "Origin, X-Requested-With, Content-Type, Accept, Authorization"
  );
  res.header(
    "Access-Control-Allow-Methods",
    "GET, POST, PUT, DELETE"
  );
  res.header("Access-Control-Allow-Credentials",true);
  next();
 });
 app.get('/orders', (req, res) => {
  console.log('Returning orders');
  res.send(orders);
 });
 app.put('/orders', (req, res) => {
  console.log('updating orders');
  res.send(orders);
 });
 app.listen(port);
--- a/csrf/README.md
+++ b/csrf/README.md
@@ -0,0 +1,3 @@
 # Related Blog Posts
 * [Complete guide to CSRF](https://reflectoring.io/complete-guide-to-csrf/)
--- a/csrf/index.js
+++ b/csrf/index.js
@@ -0,0 +1,28 @@
 const express = require('express');
 const csrf = require('csurf');
 const cookieParser = require('cookie-parser');
 var csrfProtection = csrf({ cookie: true });
 var parseForm = express.urlencoded({ extended: false });
 var app = express();
 app.set('view engine','ejs')
 app.use(cookieParser());
 app.get('/transfer', csrfProtection, function (req, res) {
 // pass the csrfToken to the view
 res.render('transfer', { csrfToken: req.csrfToken() });
 });
 app.post('/process', parseForm,
 	csrfProtection, function (req, res) {
    res.send('Transfer Successful!!');
 });
 app.listen(3000, (err) => {
    if (err) console.log(err);
        console.log('Server listening on 3000');
    }
 );
--- a/csrf/package.json
+++ b/csrf/package.json
@@ -0,0 +1,23 @@
 {
  "name": "csrfapp",
  "version": "1.0.0",
  "description": "CSRF mitigation example",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [
    "csrf"
  ],
  "author": "Pratik Das",
  "license": "ISC",
  "dependencies": {
    "body-parser": "^1.19.0",
    "cookie-parser": "^1.4.5",
    "cookie-session": "^1.4.0",
    "csurf": "^1.11.0",
    "ejs": "^3.1.6",
    "express": "^4.17.1",
    "pug": "^3.0.2"
  }
 }
--- a/csrf/views/transfer.ejs
+++ b/csrf/views/transfer.ejs
@@ -0,0 +1,23 @@
 <html>
 <head>
 	<title>CSRF Token Demo</title>
 </head>
 <body>
 	<form action="process" method="POST">
 	<input type="hidden" name="_csrf" value="<%= csrfToken %>">
 	<div>			
 	<label>Amount:</label><input type="text" name="amount">
 	</div>
 	<br/>
 	<div>			
 		<label>Transfer To:</label><input type="text" name="account">
 	</div>
 	<br/>
 	<div>	
 	    <input type="submit" value="Transfer">
 	</div>
 	</form>
 </body>
 </html>
--- a/logging/structured-logging/.gitignore
+++ b/logging/structured-logging/.gitignore
@@ -0,0 +1,33 @@
 HELP.md
 target/
 !.mvn/wrapper/maven-wrapper.jar
 !**/src/main/**/target/
 !**/src/test/**/target/
 ### STS ###
 .apt_generated
 .classpath
 .factorypath
 .project
 .settings
 .springBeans
 .sts4-cache
 ### IntelliJ IDEA ###
 .idea
 *.iws
 *.iml
 *.ipr
 ### NetBeans ###
 /nbproject/private/
 /nbbuild/
 /dist/
 /nbdist/
 /.nb-gradle/
 build/
 !**/src/main/**/build/
 !**/src/test/**/build/
 ### VS Code ###
 .vscode/
--- a/logging/structured-logging/.mvn/wrapper/MavenWrapperDownloader.java
+++ b/logging/structured-logging/.mvn/wrapper/MavenWrapperDownloader.java
@@ -0,0 +1,117 @@
 /*
 * Copyright 2007-present the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 import java.net.*;
 import java.io.*;
 import java.nio.channels.*;
 import java.util.Properties;
 public class MavenWrapperDownloader {
    private static final String WRAPPER_VERSION = "0.5.6";
    /**
     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
     */
    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
    /**
     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
     * use instead of the default one.
     */
    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
            ".mvn/wrapper/maven-wrapper.properties";
    /**
     * Path where the maven-wrapper.jar will be saved to.
     */
    private static final String MAVEN_WRAPPER_JAR_PATH =
            ".mvn/wrapper/maven-wrapper.jar";
    /**
     * Name of the property which should be used to override the default download url for the wrapper.
     */
    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
    public static void main(String args[]) {
        System.out.println("- Downloader started");
        File baseDirectory = new File(args[0]);
        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
        // If the maven-wrapper.properties exists, read it and check if it contains a custom
        // wrapperUrl parameter.
        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
        String url = DEFAULT_DOWNLOAD_URL;
        if(mavenWrapperPropertyFile.exists()) {
            FileInputStream mavenWrapperPropertyFileInputStream = null;
            try {
                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
                Properties mavenWrapperProperties = new Properties();
                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
            } catch (IOException e) {
                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
            } finally {
                try {
                    if(mavenWrapperPropertyFileInputStream != null) {
                        mavenWrapperPropertyFileInputStream.close();
                    }
                } catch (IOException e) {
                    // Ignore ...
                }
            }
        }
        System.out.println("- Downloading from: " + url);
        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
        if(!outputFile.getParentFile().exists()) {
            if(!outputFile.getParentFile().mkdirs()) {
                System.out.println(
                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
            }
        }
        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
        try {
            downloadFileFromURL(url, outputFile);
            System.out.println("Done");
            System.exit(0);
        } catch (Throwable e) {
            System.out.println("- Error downloading");
            e.printStackTrace();
            System.exit(1);
        }
    }
    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
            String username = System.getenv("MVNW_USERNAME");
            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
            Authenticator.setDefault(new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(username, password);
                }
            });
        }
        URL website = new URL(urlString);
        ReadableByteChannel rbc;
        rbc = Channels.newChannel(website.openStream());
        FileOutputStream fos = new FileOutputStream(destination);
        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
        fos.close();
        rbc.close();
    }
 }
--- a/logging/structured-logging/.mvn/wrapper/maven-wrapper.jar
+++ b/logging/structured-logging/.mvn/wrapper/maven-wrapper.jar
--- a/logging/structured-logging/.mvn/wrapper/maven-wrapper.properties
+++ b/logging/structured-logging/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,2 @@
 distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.1/apache-maven-3.8.1-bin.zip
 wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar
--- a/logging/structured-logging/README.md
+++ b/logging/structured-logging/README.md
@@ -0,0 +1,3 @@
 1. Start the app with `./mvn spring-boot:run`.
 2. Go to `http://localhost:8080/hello`.
 3. Log in as `user` with the password that is printed in the log output of the app.
--- a/logging/structured-logging/mvnw
+++ b/logging/structured-logging/mvnw
@@ -0,0 +1,310 @@
 #!/bin/sh
 # ----------------------------------------------------------------------------
 # Licensed to the Apache Software Foundation (ASF) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
 # regarding copyright ownership.  The ASF licenses this file
 # to you under the Apache License, Version 2.0 (the
 # "License"); you may not use this file except in compliance
 # with the License.  You may obtain a copy of the License at
 #
 #    https://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
 # ----------------------------------------------------------------------------
 # ----------------------------------------------------------------------------
 # Maven Start Up Batch script
 #
 # Required ENV vars:
 # ------------------
 #   JAVA_HOME - location of a JDK home dir
 #
 # Optional ENV vars
 # -----------------
 #   M2_HOME - location of maven2's installed home dir
 #   MAVEN_OPTS - parameters passed to the Java VM when running Maven
 #     e.g. to debug Maven itself, use
 #       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
 #   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
 # ----------------------------------------------------------------------------
 if [ -z "$MAVEN_SKIP_RC" ] ; then
  if [ -f /etc/mavenrc ] ; then
    . /etc/mavenrc
  fi
  if [ -f "$HOME/.mavenrc" ] ; then
    . "$HOME/.mavenrc"
  fi
 fi
 # OS specific support.  $var _must_ be set to either true or false.
 cygwin=false;
 darwin=false;
 mingw=false
 case "`uname`" in
  CYGWIN*) cygwin=true ;;
  MINGW*) mingw=true;;
  Darwin*) darwin=true
    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
    if [ -z "$JAVA_HOME" ]; then
      if [ -x "/usr/libexec/java_home" ]; then
        export JAVA_HOME="`/usr/libexec/java_home`"
      else
        export JAVA_HOME="/Library/Java/Home"
      fi
    fi
    ;;
 esac
 if [ -z "$JAVA_HOME" ] ; then
  if [ -r /etc/gentoo-release ] ; then
    JAVA_HOME=`java-config --jre-home`
  fi
 fi
 if [ -z "$M2_HOME" ] ; then
  ## resolve links - $0 may be a link to maven's home
  PRG="$0"
  # need this for relative symlinks
  while [ -h "$PRG" ] ; do
    ls=`ls -ld "$PRG"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '/.*' > /dev/null; then
      PRG="$link"
    else
      PRG="`dirname "$PRG"`/$link"
    fi
  done
  saveddir=`pwd`
  M2_HOME=`dirname "$PRG"`/..
  # make it fully qualified
  M2_HOME=`cd "$M2_HOME" && pwd`
  cd "$saveddir"
  # echo Using m2 at $M2_HOME
 fi
 # For Cygwin, ensure paths are in UNIX format before anything is touched
 if $cygwin ; then
  [ -n "$M2_HOME" ] &&
    M2_HOME=`cygpath --unix "$M2_HOME"`
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
  [ -n "$CLASSPATH" ] &&
    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
 fi
 # For Mingw, ensure paths are in UNIX format before anything is touched
 if $mingw ; then
  [ -n "$M2_HOME" ] &&
    M2_HOME="`(cd "$M2_HOME"; pwd)`"
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
 fi
 if [ -z "$JAVA_HOME" ]; then
  javaExecutable="`which javac`"
  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
    # readlink(1) is not available as standard on Solaris 10.
    readLink=`which readlink`
    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
      if $darwin ; then
        javaHome="`dirname \"$javaExecutable\"`"
        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
      else
        javaExecutable="`readlink -f \"$javaExecutable\"`"
      fi
      javaHome="`dirname \"$javaExecutable\"`"
      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
      JAVA_HOME="$javaHome"
      export JAVA_HOME
    fi
  fi
 fi
 if [ -z "$JAVACMD" ] ; then
  if [ -n "$JAVA_HOME"  ] ; then
    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
      # IBM's JDK on AIX uses strange locations for the executables
      JAVACMD="$JAVA_HOME/jre/sh/java"
    else
      JAVACMD="$JAVA_HOME/bin/java"
    fi
  else
    JAVACMD="`which java`"
  fi
 fi
 if [ ! -x "$JAVACMD" ] ; then
  echo "Error: JAVA_HOME is not defined correctly." >&2
  echo "  We cannot execute $JAVACMD" >&2
  exit 1
 fi
 if [ -z "$JAVA_HOME" ] ; then
  echo "Warning: JAVA_HOME environment variable is not set."
 fi
 CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
 # traverses directory structure from process work directory to filesystem root
 # first directory with .mvn subdirectory is considered project base directory
 find_maven_basedir() {
  if [ -z "$1" ]
  then
    echo "Path not specified to find_maven_basedir"
    return 1
  fi
  basedir="$1"
  wdir="$1"
  while [ "$wdir" != '/' ] ; do
    if [ -d "$wdir"/.mvn ] ; then
      basedir=$wdir
      break
    fi
    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
    if [ -d "${wdir}" ]; then
      wdir=`cd "$wdir/.."; pwd`
    fi
    # end of workaround
  done
  echo "${basedir}"
 }
 # concatenates all lines of a file
 concat_lines() {
  if [ -f "$1" ]; then
    echo "$(tr -s '\n' ' ' < "$1")"
  fi
 }
 BASE_DIR=`find_maven_basedir "$(pwd)"`
 if [ -z "$BASE_DIR" ]; then
  exit 1;
 fi
 ##########################################################################################
 # Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
 # This allows using the maven wrapper in projects that prohibit checking in binary data.
 ##########################################################################################
 if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
    if [ "$MVNW_VERBOSE" = true ]; then
      echo "Found .mvn/wrapper/maven-wrapper.jar"
    fi
 else
    if [ "$MVNW_VERBOSE" = true ]; then
      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
    fi
    if [ -n "$MVNW_REPOURL" ]; then
      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
    else
      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
    fi
    while IFS="=" read key value; do
      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
      esac
    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
    if [ "$MVNW_VERBOSE" = true ]; then
      echo "Downloading from: $jarUrl"
    fi
    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
    if $cygwin; then
      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
    fi
    if command -v wget > /dev/null; then
        if [ "$MVNW_VERBOSE" = true ]; then
          echo "Found wget ... using wget"
        fi
        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
            wget "$jarUrl" -O "$wrapperJarPath"
        else
            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
        fi
    elif command -v curl > /dev/null; then
        if [ "$MVNW_VERBOSE" = true ]; then
          echo "Found curl ... using curl"
        fi
        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
            curl -o "$wrapperJarPath" "$jarUrl" -f
        else
            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
        fi
    else
        if [ "$MVNW_VERBOSE" = true ]; then
          echo "Falling back to using Java to download"
        fi
        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
        # For Cygwin, switch paths to Windows format before running javac
        if $cygwin; then
          javaClass=`cygpath --path --windows "$javaClass"`
        fi
        if [ -e "$javaClass" ]; then
            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
                if [ "$MVNW_VERBOSE" = true ]; then
                  echo " - Compiling MavenWrapperDownloader.java ..."
                fi
                # Compiling the Java class
                ("$JAVA_HOME/bin/javac" "$javaClass")
            fi
            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
                # Running the downloader
                if [ "$MVNW_VERBOSE" = true ]; then
                  echo " - Running MavenWrapperDownloader.java ..."
                fi
                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
            fi
        fi
    fi
 fi
 ##########################################################################################
 # End of extension
 ##########################################################################################
 export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
 if [ "$MVNW_VERBOSE" = true ]; then
  echo $MAVEN_PROJECTBASEDIR
 fi
 MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
 # For Cygwin, switch paths to Windows format before running java
 if $cygwin; then
  [ -n "$M2_HOME" ] &&
    M2_HOME=`cygpath --path --windows "$M2_HOME"`
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
  [ -n "$CLASSPATH" ] &&
    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
 fi
 # Provide a "standardized" way to retrieve the CLI args that will
 # work with both Windows and non-Windows executions.
 MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
 export MAVEN_CMD_LINE_ARGS
 WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
 exec "$JAVACMD" \
  $MAVEN_OPTS \
  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
--- a/logging/structured-logging/mvnw.cmd
+++ b/logging/structured-logging/mvnw.cmd
@@ -0,0 +1,182 @@
@REM ----------------------------------------------------------------------------
@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements.  See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership.  The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License.  You may obtain a copy of the License at
@REM
@REM    https://www.apache.org/licenses/LICENSE-2.0
@REM
@REM Unless required by applicable law or agreed to in writing,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied.  See the License for the
@REM specific language governing permissions and limitations
@REM under the License.
@REM ----------------------------------------------------------------------------
@REM ----------------------------------------------------------------------------
@REM Maven Start Up Batch script
@REM
@REM Required ENV vars:
@REM JAVA_HOME - location of a JDK home dir
@REM
@REM Optional ENV vars
@REM M2_HOME - location of maven2's installed home dir
@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
@REM     e.g. to debug Maven itself, use
@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
@REM ----------------------------------------------------------------------------
@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM set title of command window
 title %0
@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
@REM set %HOME% to equivalent of $HOME
 if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
@REM Execute a user defined script before this one
 if not "%MAVEN_SKIP_RC%" == "" goto skipRcPre
@REM check for pre script, once with legacy .bat ending and once with .cmd ending
 if exist "%HOME%\mavenrc_pre.bat" call "%HOME%\mavenrc_pre.bat"
 if exist "%HOME%\mavenrc_pre.cmd" call "%HOME%\mavenrc_pre.cmd"
 :skipRcPre
@setlocal
 set ERROR_CODE=0
@REM To isolate internal variables from possible post scripts, we use another setlocal
@setlocal
@REM ==== START VALIDATION ====
 if not "%JAVA_HOME%" == "" goto OkJHome
 echo.
 echo Error: JAVA_HOME not found in your environment. >&2
 echo Please set the JAVA_HOME variable in your environment to match the >&2
 echo location of your Java installation. >&2
 echo.
 goto error
 :OkJHome
 if exist "%JAVA_HOME%\bin\java.exe" goto init
 echo.
 echo Error: JAVA_HOME is set to an invalid directory. >&2
 echo JAVA_HOME = "%JAVA_HOME%" >&2
 echo Please set the JAVA_HOME variable in your environment to match the >&2
 echo location of your Java installation. >&2
 echo.
 goto error
@REM ==== END VALIDATION ====
 :init
@REM Find the project base dir, i.e. the directory that contains the folder ".mvn".
@REM Fallback to current working directory if not found.
 set MAVEN_PROJECTBASEDIR=%MAVEN_BASEDIR%
 IF NOT "%MAVEN_PROJECTBASEDIR%"=="" goto endDetectBaseDir
 set EXEC_DIR=%CD%
 set WDIR=%EXEC_DIR%
 :findBaseDir
 IF EXIST "%WDIR%"\.mvn goto baseDirFound
 cd ..
 IF "%WDIR%"=="%CD%" goto baseDirNotFound
 set WDIR=%CD%
 goto findBaseDir
 :baseDirFound
 set MAVEN_PROJECTBASEDIR=%WDIR%
 cd "%EXEC_DIR%"
 goto endDetectBaseDir
 :baseDirNotFound
 set MAVEN_PROJECTBASEDIR=%EXEC_DIR%
 cd "%EXEC_DIR%"
 :endDetectBaseDir
 IF NOT EXIST "%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config" goto endReadAdditionalConfig
@setlocal EnableExtensions EnableDelayedExpansion
 for /F "usebackq delims=" %%a in ("%MAVEN_PROJECTBASEDIR%\.mvn\jvm.config") do set JVM_CONFIG_MAVEN_PROPS=!JVM_CONFIG_MAVEN_PROPS! %%a
@endlocal & set JVM_CONFIG_MAVEN_PROPS=%JVM_CONFIG_MAVEN_PROPS%
 :endReadAdditionalConfig
 SET MAVEN_JAVA_EXE="%JAVA_HOME%\bin\java.exe"
 set WRAPPER_JAR="%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.jar"
 set WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
 set DOWNLOAD_URL="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
 FOR /F "tokens=1,2 delims==" %%A IN ("%MAVEN_PROJECTBASEDIR%\.mvn\wrapper\maven-wrapper.properties") DO (
    IF "%%A"=="wrapperUrl" SET DOWNLOAD_URL=%%B
 )
@REM Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
@REM This allows using the maven wrapper in projects that prohibit checking in binary data.
 if exist %WRAPPER_JAR% (
    if "%MVNW_VERBOSE%" == "true" (
        echo Found %WRAPPER_JAR%
    )
 ) else (
    if not "%MVNW_REPOURL%" == "" (
        SET DOWNLOAD_URL="%MVNW_REPOURL%/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
    )
    if "%MVNW_VERBOSE%" == "true" (
        echo Couldn't find %WRAPPER_JAR%, downloading it ...
        echo Downloading from: %DOWNLOAD_URL%
    )
    powershell -Command "&{"^
 		"$webclient = new-object System.Net.WebClient;"^
 		"if (-not ([string]::IsNullOrEmpty('%MVNW_USERNAME%') -and [string]::IsNullOrEmpty('%MVNW_PASSWORD%'))) {"^
 		"$webclient.Credentials = new-object System.Net.NetworkCredential('%MVNW_USERNAME%', '%MVNW_PASSWORD%');"^
 		"}"^
 		"[Net.ServicePointManager]::SecurityProtocol = [Net.SecurityProtocolType]::Tls12; $webclient.DownloadFile('%DOWNLOAD_URL%', '%WRAPPER_JAR%')"^
 		"}"
    if "%MVNW_VERBOSE%" == "true" (
        echo Finished downloading %WRAPPER_JAR%
    )
 )
@REM End of extension
@REM Provide a "standardized" way to retrieve the CLI args that will
@REM work with both Windows and non-Windows executions.
 set MAVEN_CMD_LINE_ARGS=%*
 %MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %WRAPPER_JAR% "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %WRAPPER_LAUNCHER% %MAVEN_CONFIG% %*
 if ERRORLEVEL 1 goto error
 goto end
 :error
 set ERROR_CODE=1
 :end
@endlocal & set ERROR_CODE=%ERROR_CODE%
 if not "%MAVEN_SKIP_RC%" == "" goto skipRcPost
@REM check for post script, once with legacy .bat ending and once with .cmd ending
 if exist "%HOME%\mavenrc_post.bat" call "%HOME%\mavenrc_post.bat"
 if exist "%HOME%\mavenrc_post.cmd" call "%HOME%\mavenrc_post.cmd"
 :skipRcPost
@REM pause the script if MAVEN_BATCH_PAUSE is set to 'on'
 if "%MAVEN_BATCH_PAUSE%" == "on" pause
 if "%MAVEN_TERMINATE_CMD%" == "on" exit %ERROR_CODE%
 exit /B %ERROR_CODE%
--- a/logging/structured-logging/pom.xml
+++ b/logging/structured-logging/pom.xml
@@ -0,0 +1,71 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
 		<version>2.5.3</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>io.reflectoring</groupId>
 	<artifactId>structured-logging</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
 	<name>structured-logging</name>
 	<description>Demo project for Spring Boot</description>
 	<properties>
 		<java.version>11</java.version>
 	</properties>
 	<dependencyManagement>
 		<dependencies>
 			<dependency>
 				<groupId>org.springframework.cloud</groupId>
 				<artifactId>spring-cloud-dependencies</artifactId>
 				<version>2020.0.3</version>
 				<type>pom</type>
 				<scope>import</scope>
 			</dependency>
 		</dependencies>
 	</dependencyManagement>
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-security</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.cloud</groupId>
 			<artifactId>spring-cloud-starter-sleuth</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>io.logz.logback</groupId>
 			<artifactId>logzio-logback-appender</artifactId>
 			<version>1.0.24</version>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
 	</dependencies>
 	<build>
 		<plugins>
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
 			</plugin>
 		</plugins>
 	</build>
 </project>
--- a/logging/structured-logging/src/main/java/io/reflectoring/CombobulatorException.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/CombobulatorException.java
@@ -0,0 +1,5 @@
 package io.reflectoring;
 public class CombobulatorException extends RuntimeException {
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/FluxCompensatorException.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/FluxCompensatorException.java
@@ -0,0 +1,5 @@
 package io.reflectoring;
 public class FluxCompensatorException extends RuntimeException {
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/MaintenanceWindowException.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/MaintenanceWindowException.java
@@ -0,0 +1,5 @@
 package io.reflectoring;
 public class MaintenanceWindowException extends RuntimeException {
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/ThingyException.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/ThingyException.java
@@ -0,0 +1,5 @@
 package io.reflectoring;
 public class ThingyException extends RuntimeException {
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/DomainService.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/DomainService.java
@@ -0,0 +1,36 @@
 package io.reflectoring.structuredlogging;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.MDC;
 import org.springframework.stereotype.Component;
 import java.time.Duration;
 import java.time.Instant;
@Component
 public class DomainService {
    private static final Logger logger = LoggerFactory.getLogger(DomainService.class);
    String hello(){
        logger.info("log event from the domain service");
        return "hello";
    }
    String callThirdPartyService() throws InterruptedException {
        logger.info("log event from the domain service");
        Instant start = Instant.now();
        Thread.sleep(2000); // simulating an expensive operation
        Duration duration = Duration.between(start, Instant.now());
        MDC.put("thirdPartyCallDuration", String.valueOf(duration.getNano()));
        logger.info("call to third party service successful!");
        MDC.remove("thirdPartyCallDuration");
        return "hello";
    }
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/LoggingInterceptor.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/LoggingInterceptor.java
@@ -0,0 +1,42 @@
 package io.reflectoring.structuredlogging;
 import org.slf4j.MDC;
 import org.springframework.security.core.context.SecurityContextHolder;
 import org.springframework.security.core.userdetails.UserDetails;
 import org.springframework.web.servlet.HandlerInterceptor;
 import org.springframework.web.servlet.ModelAndView;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 public class LoggingInterceptor implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
        if (principal instanceof UserDetails) {
            String username = ((UserDetails)principal).getUsername();
            MDC.put("username", username);
        } else {
            String username = principal.toString();
            MDC.put("username", username);
        }
        if (request.getHeader("X-CUSTOM-HEADER") != null) {
            MDC.put("codePath", "3rdParty");
        } else {
            MDC.put("codePath", "user");
        }
        return true;
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) {
        MDC.remove("username");
        MDC.remove("codePath");
    }
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/StructuredLoggingApplication.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/StructuredLoggingApplication.java
@@ -0,0 +1,15 @@
 package io.reflectoring.structuredlogging;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.scheduling.annotation.EnableScheduling;
@SpringBootApplication
@EnableScheduling
 public class StructuredLoggingApplication {
 	public static void main(String[] args) {
 		SpringApplication.run(StructuredLoggingApplication.class, args);
 	}
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/Timer.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/Timer.java
@@ -0,0 +1,28 @@
 package io.reflectoring.structuredlogging;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.MDC;
 import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Component;
@Component
 public class Timer {
    private final DomainService domainService;
    private static final Logger logger = LoggerFactory.getLogger(Timer.class);
    public Timer(DomainService domainService) {
        this.domainService = domainService;
    }
    @Scheduled(fixedDelay = 5000)
    void scheduledHello() {
        MDC.put("codePath", "timer");
        logger.info("log event from timer");
        domainService.hello();
        MDC.remove("codePath");
    }
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebConfigurer.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebConfigurer.java
@@ -0,0 +1,14 @@
 package io.reflectoring.structuredlogging;
 import org.springframework.stereotype.Component;
 import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
 import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@Component
 public class WebConfigurer implements WebMvcConfigurer {
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(new LoggingInterceptor());
    }
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebController.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebController.java
@@ -0,0 +1,57 @@
 package io.reflectoring.structuredlogging;
 import io.reflectoring.CombobulatorException;
 import io.reflectoring.FluxCompensatorException;
 import io.reflectoring.MaintenanceWindowException;
 import io.reflectoring.ThingyException;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
 import java.util.Random;
@RestController
 public class WebController {
    private final DomainService domainService;
    private static final Logger logger = LoggerFactory.getLogger(WebController.class);
    private final Random random = new Random();
    public WebController(DomainService domainService) {
        this.domainService = domainService;
    }
    @GetMapping("/hello")
    String helloWorld() {
        logger.info("log event from the web controller");
        return domainService.hello();
    }
    @GetMapping("/thirdparty")
    String thirdparty() throws InterruptedException {
        logger.info("log event from the web controller");
        return domainService.callThirdPartyService();
    }
    @GetMapping("/exception")
    String error() {
        logger.info("log event from the web controller");
        int r = random.nextInt(101);
        if (r <= 10) {
            throw new CombobulatorException();
        } else if (r <= 30) {
            throw new FluxCompensatorException();
        } else if (r <= 80) {
            throw new ThingyException();
        } else {
            throw new MaintenanceWindowException();
        }
    }
 }
--- a/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebExceptionHandler.java
+++ b/logging/structured-logging/src/main/java/io/reflectoring/structuredlogging/WebExceptionHandler.java
@@ -0,0 +1,32 @@
 package io.reflectoring.structuredlogging;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.slf4j.MDC;
 import org.springframework.http.HttpStatus;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.ResponseStatus;
@ControllerAdvice
 public class WebExceptionHandler {
    private static final Logger logger = LoggerFactory.getLogger(WebExceptionHandler.class);
    @ExceptionHandler(Exception.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public void internalServerError(Exception e){
        MDC.put("rootCause", getRootCause(e).getClass().getName());
        logger.error("returning 500 (internal server error).", e);
        MDC.remove("rootCause");
    }
    private Throwable getRootCause(Exception e){
        Throwable rootCause = e;
        while(e.getCause() != null && rootCause.getCause() != rootCause){
            rootCause = e.getCause();
        }
        return rootCause;
    }
 }
--- a/logging/structured-logging/src/main/resources/application.properties
+++ b/logging/structured-logging/src/main/resources/application.properties
@@ -0,0 +1 @@
--- a/logging/structured-logging/src/main/resources/logback.xml
+++ b/logging/structured-logging/src/main/resources/logback.xml
@@ -0,0 +1,23 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <configuration>
    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
        <layout class="ch.qos.logback.classic.PatternLayout">
            <Pattern>
                %cyan(%d{ISO8601}) %highlight(%-5level) [%blue(%-30t)] [%blue(%X{codePath})] [%blue(%X{rootCause})] [%X{traceId:-},%X{spanId:-}] [%X{thirdPartyCallDuration}] %yellow(%C{1.}): %msg%n%throwable
            </Pattern>
        </layout>
    </appender>
    <appender name="LOGZIO" class="io.logz.logback.LogzioLogbackAppender">
        <token>${LOGZIO_TOKEN}</token>
        <logzioUrl>https://listener.logz.io:8071</logzioUrl>
        <logzioType>structured-logging-application</logzioType>
    </appender>
    <root level="INFO">
        <appender-ref ref="CONSOLE"/>
        <appender-ref ref="LOGZIO"/>
    </root>
 </configuration>
--- a/logging/structured-logging/src/test/java/io/reflectoring/structuredlogging/StructuredLoggingApplicationTests.java
+++ b/logging/structured-logging/src/test/java/io/reflectoring/structuredlogging/StructuredLoggingApplicationTests.java
@@ -0,0 +1,13 @@
 package io.reflectoring.structuredlogging;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
 class StructuredLoggingApplicationTests {
 	@Test
 	void contextLoads() {
 	}
 }
--- a/resilience4j/springboot-resilience4j/.mvn/wrapper/MavenWrapperDownloader.java
+++ b/resilience4j/springboot-resilience4j/.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();
    }
 }
--- a/resilience4j/springboot-resilience4j/.mvn/wrapper/maven-wrapper.jar
+++ b/resilience4j/springboot-resilience4j/.mvn/wrapper/maven-wrapper.jar
--- a/resilience4j/springboot-resilience4j/.mvn/wrapper/maven-wrapper.properties
+++ b/resilience4j/springboot-resilience4j/.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
--- a/resilience4j/springboot-resilience4j/README.md
+++ b/resilience4j/springboot-resilience4j/README.md
@@ -0,0 +1,7 @@
 # Retry with Resilience4J
 Run the SpringbootResilience4jApplication program
 ## Blog posts
 * [Implementing Retry with Spring_Boot_Resilience4j](https://reflectoring.io/retry-with-springboot-resilience4j/)
--- a/resilience4j/springboot-resilience4j/mvnw
+++ b/resilience4j/springboot-resilience4j/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} $MAVEN_CONFIG "$@"
--- a/resilience4j/springboot-resilience4j/mvnw.cmd
+++ b/resilience4j/springboot-resilience4j/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%
--- a/resilience4j/springboot-resilience4j/pom.xml
+++ b/resilience4j/springboot-resilience4j/pom.xml
@@ -0,0 +1,77 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
 		<version>2.4.1</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>io.reflectoring.resilience4j.springboot</groupId>
 	<artifactId>springboot-resilience4j</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
 	<name>springboot-resilience4j</name>
 	<url>https://reflectoring.io</url>
 	<description>Spring Boot &amp; Resilience4j</description>
 	<properties>
 		<java.version>11</java.version>
 	</properties>
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
 		<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-actuator -->
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-actuator</artifactId>
 			<version>2.4.1</version>
 		</dependency>
 		<!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-starter-aop -->
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-aop</artifactId>
 			<version>2.4.1</version>
 		</dependency>
 		<!-- https://mvnrepository.com/artifact/io.github.resilience4j/resilience4j-spring-boot2 -->
 		<dependency>
 			<groupId>io.github.resilience4j</groupId>
 			<artifactId>resilience4j-spring-boot2</artifactId>
 			<version>1.7.0</version>
 		</dependency>
 		<dependency>
 			<groupId>org.projectlombok</groupId>
 			<artifactId>lombok</artifactId>
 			<version>1.18.12</version>
 		</dependency>
 	</dependencies>
 	<build>
 		<plugins>
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
 			</plugin>
 		</plugins>
 	</build>
 </project>
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/RetryExamplesRunner.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/RetryExamplesRunner.java
@@ -0,0 +1,122 @@
 package io.reflectoring.resilience4j.springboot;
 import io.reflectoring.resilience4j.springboot.model.Flight;
 import io.reflectoring.resilience4j.springboot.model.SearchRequest;
 import io.reflectoring.resilience4j.springboot.model.SearchResponse;
 import io.reflectoring.resilience4j.springboot.services.failures.FailNTimes;
 import io.reflectoring.resilience4j.springboot.services.failures.FailNTimesCheckedException;
 import java.io.IOException;
 import java.util.List;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Component;
@Component
 public class RetryExamplesRunner {
  @Autowired
  private RetryingService service;
  public static void main(String[] args) {
    RetryExamplesRunner runner = new RetryExamplesRunner();
    runner.run();
  }
  public void run() {
    System.out.println("Running retry examples");
    System.out.println(
        "------------------------- basicExample ---------------------------------------------");
    basicExample();
    System.out.println("----------------------------------------------------------------------");
    System.out.println(
        "------------------------- checkedExceptionExample ---------------------------------------------");
    checkedExceptionExample();
    System.out.println("----------------------------------------------------------------------");
    System.out.println(
        "--------------------------- predicateExample -------------------------------------------");
    predicateExample();
    System.out.println("----------------------------------------------------------------------");
    System.out.println(
        "---------------------------- intervalFunction_Random ------------------------------------------");
    intervalFunction_Random();
    System.out.println("----------------------------------------------------------------------");
    System.out.println(
        "----------------------------- intervalFunction_Exponential -----------------------------------------");
    intervalFunction_Exponential();
    System.out.println("----------------------------------------------------------------------");
    System.out.println(
        "----------------------------- retryEventsExample -----------------------------------------");
    retryEventsExample();
    System.out.println("----------------------------------------------------------------------");
    System.out.println(
        "----------------------------- fallbackExample -----------------------------------------");
    fallbackExample();
    System.out.println("----------------------------------------------------------------------");
  }
  private void retryEventsExample() {
    service.setPotentialFailure(new FailNTimes(2));
    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2021");
    List<Flight> flights = service.loggedRetryExample(request);
    System.out.println(flights);
  }
  private void intervalFunction_Exponential() {
    service.setPotentialFailure(new FailNTimes(5));
    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2021");
    List<Flight> flights = service.intervalFunctionExponential(request);
    System.out.println(flights);
  }
  private void intervalFunction_Random() {
    service.setPotentialFailure(new FailNTimes(2));
    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2021");
    List<Flight> flights = service.intervalFunctionRandom(request);
    System.out.println(flights);
  }
  private void predicateExample() {
    service.setPotentialFailure(new FailNTimes(1));
    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2021");
    try {
      SearchResponse response = service.predicateExample(request);
      List<Flight> flights = response.getFlights();
      System.out.println(flights);
    } catch (IOException e) {
      e.printStackTrace();
    }
  }
  private void checkedExceptionExample() {
    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2021");
    service.setPotentialFailureCheckedException(new FailNTimesCheckedException(2));
    try {
      List<Flight> flights = service.searchFlightsThrowingException(request);
      System.out.println(flights);
    } catch (Exception e) {
      System.out.println(e.getMessage());
    }
  }
  private void basicExample() {
    service.setPotentialFailure(new FailNTimes(1));
    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2021");
    List<Flight> flights = service.basicExample(request);
    System.out.println(flights);
  }
  private void fallbackExample() {
    service.setPotentialFailure(new FailNTimes(4));
    SearchRequest request = new SearchRequest("NYC", "LAX", "07/31/2021");
    List<Flight> flights = service.fallbackExample(request);
    System.out.println(flights);
  }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/RetryingService.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/RetryingService.java
@@ -0,0 +1,91 @@
 package io.reflectoring.resilience4j.springboot;
 import io.github.resilience4j.retry.RetryRegistry;
 import io.github.resilience4j.retry.annotation.Retry;
 import io.reflectoring.resilience4j.springboot.model.Flight;
 import io.reflectoring.resilience4j.springboot.model.SearchRequest;
 import io.reflectoring.resilience4j.springboot.model.SearchResponse;
 import io.reflectoring.resilience4j.springboot.services.FlightSearchService;
 import io.reflectoring.resilience4j.springboot.services.failures.PotentialFailure;
 import io.reflectoring.resilience4j.springboot.services.failures.PotentialFailureCheckedException;
 import java.io.IOException;
 import java.util.Arrays;
 import java.util.List;
 import javax.annotation.PostConstruct;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
@Service
 public class RetryingService {
  @Autowired
  private FlightSearchService remoteSearchService;
  @Autowired
  private RetryRegistry registry;
  @Retry(name = "basic")
  public List<Flight> basicExample(SearchRequest request) {
    return remoteSearchService.searchFlights(request);
  }
  @Retry(name = "throwingException")
  public List<Flight> searchFlightsThrowingException(SearchRequest request) throws Exception {
    return remoteSearchService.searchFlightsThrowingException(request);
  }
  @Retry(name = "predicateExample")
  SearchResponse predicateExample(SearchRequest request) throws IOException {
    return remoteSearchService.httpSearchFlights(request);
  }
  @Retry(name = "intervalFunctionRandomExample")
  public List<Flight> intervalFunctionRandom(SearchRequest request) {
    return remoteSearchService.searchFlights(request);
  }
  @Retry(name = "intervalFunctionExponentialExample")
  public List<Flight> intervalFunctionExponential(SearchRequest request) {
    return remoteSearchService.searchFlights(request);
  }
  @Retry(name = "asyncSearchExample")
  public List<Flight> asyncSearchExample(SearchRequest request) {
    return remoteSearchService.searchFlights(request);
  }
  @Retry(name = "loggedRetryExample")
  public List<Flight> loggedRetryExample(SearchRequest request) {
    return remoteSearchService.searchFlights(request);
  }
  public void setPotentialFailure(PotentialFailure potentialFailure) {
    remoteSearchService.setPotentialFailure(potentialFailure);
  }
  public void setPotentialFailureCheckedException(
      PotentialFailureCheckedException potentialFailureCheckedException) {
    remoteSearchService.setPotentialFailureCheckedException(potentialFailureCheckedException);
  }
  @PostConstruct
  public void postConstruct() {
    registry
        .retry("loggedRetryExample")
        .getEventPublisher()
        .onRetry(System.out::println);
  }
  @Retry(name = "fallbackExample", fallbackMethod = "localCacheFlightSearch")
  public List<Flight> fallbackExample(SearchRequest request) {
    return remoteSearchService.searchFlights(request);
  }
  private List<Flight> localCacheFlightSearch(SearchRequest request, RuntimeException re) {
    System.out.println("Returning search results from cache");
    return Arrays.asList(
        new Flight("XY 765", request.getFlightDate(), request.getFrom(), request.getTo()),
        new Flight("XY 781", request.getFlightDate(), request.getFrom(), request.getTo()));
  }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/SpringbootResilience4jApplication.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/SpringbootResilience4jApplication.java
@@ -0,0 +1,22 @@
 package io.reflectoring.resilience4j.springboot;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.boot.context.event.ApplicationReadyEvent;
 import org.springframework.context.event.EventListener;
@SpringBootApplication
 public class SpringbootResilience4jApplication {
 	@Autowired
 	private RetryExamplesRunner retryExamplesRunner;
 	public static void main(String[] args) {
 		SpringApplication.run(SpringbootResilience4jApplication.class, args);
 	}
 	@EventListener(ApplicationReadyEvent.class)
 	public void runExamples() {
 		retryExamplesRunner.run();
 	}
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/exceptions/FlightServiceBaseException.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/exceptions/FlightServiceBaseException.java
@@ -0,0 +1,7 @@
 package io.reflectoring.resilience4j.springboot.exceptions;
 public class FlightServiceBaseException extends RuntimeException {
    public FlightServiceBaseException(String message) {
        super(message);
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/exceptions/RateLimitExceededException.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/exceptions/RateLimitExceededException.java
@@ -0,0 +1,14 @@
 package io.reflectoring.resilience4j.springboot.exceptions;
 public class RateLimitExceededException extends FlightServiceBaseException {
    String errorCode;
    public RateLimitExceededException(String message, String errorCode) {
        super(message);
        this.errorCode = errorCode;
    }
    public String getErrorCode() {
        return errorCode;
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/exceptions/SeatsUnavailableException.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/exceptions/SeatsUnavailableException.java
@@ -0,0 +1,7 @@
 package io.reflectoring.resilience4j.springboot.exceptions;
 public class SeatsUnavailableException extends FlightServiceBaseException {
    public SeatsUnavailableException(String message) {
        super(message);
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/model/Flight.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/model/Flight.java
@@ -0,0 +1,60 @@
 package io.reflectoring.resilience4j.springboot.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 + '\'' +
                '}';
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/model/SearchRequest.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/model/SearchRequest.java
@@ -0,0 +1,25 @@
 package io.reflectoring.resilience4j.springboot.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;
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/model/SearchResponse.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/model/SearchResponse.java
@@ -0,0 +1,32 @@
 package io.reflectoring.resilience4j.springboot.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 +
                '}';
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/predicates/ConditionalRetryPredicate.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/predicates/ConditionalRetryPredicate.java
@@ -0,0 +1,15 @@
 package io.reflectoring.resilience4j.springboot.predicates;
 import io.reflectoring.resilience4j.springboot.model.SearchResponse;
 import java.util.function.Predicate;
 public class ConditionalRetryPredicate implements Predicate<SearchResponse> {
  @Override
  public boolean test(SearchResponse searchResponse) {
    if (searchResponse.getErrorCode() != null) {
      System.out.println("Search returned error code = " + searchResponse.getErrorCode());
      return searchResponse.getErrorCode().equals("FS-167");
    }
    return false;
  }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/FlightSearchService.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/FlightSearchService.java
@@ -0,0 +1,111 @@
 package io.reflectoring.resilience4j.springboot.services;
 import io.reflectoring.resilience4j.springboot.model.Flight;
 import io.reflectoring.resilience4j.springboot.model.SearchRequest;
 import io.reflectoring.resilience4j.springboot.model.SearchResponse;
 import io.reflectoring.resilience4j.springboot.services.failures.NoCheckedExceptionFailure;
 import io.reflectoring.resilience4j.springboot.services.failures.NoFailure;
 import io.reflectoring.resilience4j.springboot.services.failures.PotentialFailure;
 import io.reflectoring.resilience4j.springboot.services.failures.PotentialFailureCheckedException;
 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;
 import org.springframework.stereotype.Service;
@Service
 public class FlightSearchService {
  PotentialFailure potentialFailure = new NoFailure();
  DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm:ss SSS");
  PotentialFailureCheckedException potentialFailureCheckedException = new NoCheckedExceptionFailure();
  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));
    try {
      if (!potentialFailureCheckedException.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;
      }
    } catch (RuntimeException re) {
      throw new Exception("Exception when searching for flights");
    }
    return Collections.EMPTY_LIST;
  }
  public void setPotentialFailure(PotentialFailure potentialFailure) {
    this.potentialFailure = potentialFailure;
  }
  public void setPotentialFailureCheckedException(
      PotentialFailureCheckedException potentialFailureCheckedException) {
    this.potentialFailureCheckedException = potentialFailureCheckedException;
  }
  public SearchResponse httpSearchFlights(SearchRequest request) throws IOException {
    System.out
        .println("Searching for flights; current time = " + LocalDateTime.now().format(formatter));
    String date = request.getFlightDate();
    String from = request.getFrom();
    String to = request.getTo();
    if (request.getFlightDate().equals("01/25/2021")) { // Simulating an error scenario
      try {
        if (!potentialFailure.occur()) {
          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;
        }
      } catch (RuntimeException re) {
        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;
      }
    }
    potentialFailure.occur();
    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;
  }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/FailHalfTheTime.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/FailHalfTheTime.java
@@ -0,0 +1,26 @@
 package io.reflectoring.resilience4j.springboot.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 boolean occur() {
        if (failedCount++ < times && random.nextInt() % 2 == 0) {
            throw new RuntimeException("Operation failed");
        }
        return false;
    }
    public static void main(String[] args) {
        PotentialFailure failure = new FailHalfTheTime(4);
        failure.occur();
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/FailNTimes.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/FailNTimes.java
@@ -0,0 +1,19 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 public class FailNTimes implements PotentialFailure {
    int times;
    int failedCount;
    public FailNTimes(int times) {
        this.times = times;
    }
    @Override
    public boolean occur() {
        if (failedCount++ < times) {
            System.out.println("Operation failed");
            throw new RuntimeException("Operation failed");
        }
        return false;
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/FailNTimesCheckedException.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/FailNTimesCheckedException.java
@@ -0,0 +1,19 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 public class FailNTimesCheckedException implements PotentialFailureCheckedException {
  int times;
  int failedCount;
  public FailNTimesCheckedException(int times) {
    this.times = times;
  }
  @Override
  public boolean occur() throws Exception {
    if (failedCount++ < times) {
      System.out.println("Operation failed, exception occurred");
      throw new Exception("Operation failed");
    }
    return false;
  }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/NoCheckedExceptionFailure.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/NoCheckedExceptionFailure.java
@@ -0,0 +1,8 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 public class NoCheckedExceptionFailure implements PotentialFailureCheckedException {
  @Override
  public boolean occur() throws Exception {
    return false;
  }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/NoFailure.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/NoFailure.java
@@ -0,0 +1,8 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 public class NoFailure implements PotentialFailure {
    @Override
    public boolean occur() {
        return false;
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/PotentialFailure.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/PotentialFailure.java
@@ -0,0 +1,5 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 public interface PotentialFailure {
    boolean occur();
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/PotentialFailureCheckedException.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/PotentialFailureCheckedException.java
@@ -0,0 +1,6 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 public interface PotentialFailureCheckedException {
  boolean occur() throws Exception;
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/RateLimitFailNTimes.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/RateLimitFailNTimes.java
@@ -0,0 +1,21 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 import io.reflectoring.resilience4j.springboot.exceptions.RateLimitExceededException;
 public class RateLimitFailNTimes implements PotentialFailure {
    int times;
    int failedCount;
    public RateLimitFailNTimes(int times) {
        this.times = times;
    }
    @Override
    public boolean occur() {
        if (failedCount++ < times) {
            System.out.println("Rate limit exceeded");
            throw new RateLimitExceededException("Rate limit exceeded, try again in some time", "RL-101");
        }
        return false;
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/SeatsUnavailableFailureNTimes.java
+++ b/resilience4j/springboot-resilience4j/src/main/java/io/reflectoring/resilience4j/springboot/services/failures/SeatsUnavailableFailureNTimes.java
@@ -0,0 +1,21 @@
 package io.reflectoring.resilience4j.springboot.services.failures;
 import io.reflectoring.resilience4j.springboot.exceptions.SeatsUnavailableException;
 public class SeatsUnavailableFailureNTimes implements PotentialFailure {
    int times;
    int failedCount;
    public SeatsUnavailableFailureNTimes(int times) {
        this.times = times;
    }
    @Override
    public boolean occur() {
        if (failedCount++ < times) {
            System.out.println("Seats not available");
            throw new SeatsUnavailableException("Seats not available");
        }
        return false;
    }
 }
--- a/resilience4j/springboot-resilience4j/src/main/resources/application.yml
+++ b/resilience4j/springboot-resilience4j/src/main/resources/application.yml
@@ -0,0 +1,51 @@
 resilience4j:
  retry:
    instances:
      # Retry object used in RetryingService.basicExample()
      basic:
        maxRetryAttempts: 3
        waitDuration: 2s
      # Retry object used in RetryingService.fallbackExample()
      fallbackExample:
        maxRetryAttempts: 3
        waitDuration: 2s
      # Retry object used in RetryingService.intervalFunctionExponentialExample()
      intervalFunctionExponentialExample:
        enableExponentialBackoff: true
        exponentialBackoffMultiplier: 2
        maxRetryAttempts: 6
        waitDuration: 1s
      # Retry object used in RetryingService.intervalFunctionRandomExample()
      intervalFunctionRandomExample:
        enableRandomizedWait: true
        maxRetryAttempts: 3
        randomizedWaitFactor: 0.5
        waitDuration: 2s
      # Retry object used in RetryingService.loggedRetryExample()
      loggedRetryExample:
        maxRetryAttempts: 3
        waitDuration: 2s
      # Retry object used in RetryingService.predicateExample()
      predicateExample:
        maxRetryAttempts: 3
        resultPredicate: io.reflectoring.resilience4j.springboot.predicates.ConditionalRetryPredicate
        waitDuration: 3s
      # Retry object used in RetryingService.basicExample_serviceThrowingException()
      throwingException:
        maxRetryAttempts: 3
        retryExceptions:
          - java.lang.Exception
        waitDuration: 2s
 management:
  endpoints:
    web:
      exposure:
        include: '*'
--- a/spring-boot/zero-downtime/.gitignore
+++ b/spring-boot/zero-downtime/.gitignore
@@ -0,0 +1,33 @@
 HELP.md
 target/
 !.mvn/wrapper/maven-wrapper.jar
 !**/src/main/**/target/
 !**/src/test/**/target/
 ### STS ###
 .apt_generated
 .classpath
 .factorypath
 .project
 .settings
 .springBeans
 .sts4-cache
 ### IntelliJ IDEA ###
 .idea
 *.iws
 *.iml
 *.ipr
 ### NetBeans ###
 /nbproject/private/
 /nbbuild/
 /dist/
 /nbdist/
 /.nb-gradle/
 build/
 !**/src/main/**/build/
 !**/src/test/**/build/
 ### VS Code ###
 .vscode/
--- a/spring-boot/zero-downtime/.mvn/wrapper/MavenWrapperDownloader.java
+++ b/spring-boot/zero-downtime/.mvn/wrapper/MavenWrapperDownloader.java
@@ -0,0 +1,117 @@
 /*
 * Copyright 2007-present the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 import java.net.*;
 import java.io.*;
 import java.nio.channels.*;
 import java.util.Properties;
 public class MavenWrapperDownloader {
    private static final String WRAPPER_VERSION = "0.5.6";
    /**
     * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
     */
    private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/"
        + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar";
    /**
     * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
     * use instead of the default one.
     */
    private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
            ".mvn/wrapper/maven-wrapper.properties";
    /**
     * Path where the maven-wrapper.jar will be saved to.
     */
    private static final String MAVEN_WRAPPER_JAR_PATH =
            ".mvn/wrapper/maven-wrapper.jar";
    /**
     * Name of the property which should be used to override the default download url for the wrapper.
     */
    private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
    public static void main(String args[]) {
        System.out.println("- Downloader started");
        File baseDirectory = new File(args[0]);
        System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
        // If the maven-wrapper.properties exists, read it and check if it contains a custom
        // wrapperUrl parameter.
        File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
        String url = DEFAULT_DOWNLOAD_URL;
        if(mavenWrapperPropertyFile.exists()) {
            FileInputStream mavenWrapperPropertyFileInputStream = null;
            try {
                mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
                Properties mavenWrapperProperties = new Properties();
                mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
                url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
            } catch (IOException e) {
                System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
            } finally {
                try {
                    if(mavenWrapperPropertyFileInputStream != null) {
                        mavenWrapperPropertyFileInputStream.close();
                    }
                } catch (IOException e) {
                    // Ignore ...
                }
            }
        }
        System.out.println("- Downloading from: " + url);
        File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
        if(!outputFile.getParentFile().exists()) {
            if(!outputFile.getParentFile().mkdirs()) {
                System.out.println(
                        "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'");
            }
        }
        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
        try {
            downloadFileFromURL(url, outputFile);
            System.out.println("Done");
            System.exit(0);
        } catch (Throwable e) {
            System.out.println("- Error downloading");
            e.printStackTrace();
            System.exit(1);
        }
    }
    private static void downloadFileFromURL(String urlString, File destination) throws Exception {
        if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) {
            String username = System.getenv("MVNW_USERNAME");
            char[] password = System.getenv("MVNW_PASSWORD").toCharArray();
            Authenticator.setDefault(new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(username, password);
                }
            });
        }
        URL website = new URL(urlString);
        ReadableByteChannel rbc;
        rbc = Channels.newChannel(website.openStream());
        FileOutputStream fos = new FileOutputStream(destination);
        fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
        fos.close();
        rbc.close();
    }
 }
--- a/spring-boot/zero-downtime/.mvn/wrapper/maven-wrapper.jar
+++ b/spring-boot/zero-downtime/.mvn/wrapper/maven-wrapper.jar
--- a/spring-boot/zero-downtime/.mvn/wrapper/maven-wrapper.properties
+++ b/spring-boot/zero-downtime/.mvn/wrapper/maven-wrapper.properties
@@ -0,0 +1,2 @@
 distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.1/apache-maven-3.8.1-bin.zip
 wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar
--- a/spring-boot/zero-downtime/mvnw
+++ b/spring-boot/zero-downtime/mvnw
@@ -0,0 +1,310 @@
 #!/bin/sh
 # ----------------------------------------------------------------------------
 # Licensed to the Apache Software Foundation (ASF) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
 # regarding copyright ownership.  The ASF licenses this file
 # to you under the Apache License, Version 2.0 (the
 # "License"); you may not use this file except in compliance
 # with the License.  You may obtain a copy of the License at
 #
 #    https://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 # KIND, either express or implied.  See the License for the
 # specific language governing permissions and limitations
 # under the License.
 # ----------------------------------------------------------------------------
 # ----------------------------------------------------------------------------
 # Maven Start Up Batch script
 #
 # Required ENV vars:
 # ------------------
 #   JAVA_HOME - location of a JDK home dir
 #
 # Optional ENV vars
 # -----------------
 #   M2_HOME - location of maven2's installed home dir
 #   MAVEN_OPTS - parameters passed to the Java VM when running Maven
 #     e.g. to debug Maven itself, use
 #       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
 #   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
 # ----------------------------------------------------------------------------
 if [ -z "$MAVEN_SKIP_RC" ] ; then
  if [ -f /etc/mavenrc ] ; then
    . /etc/mavenrc
  fi
  if [ -f "$HOME/.mavenrc" ] ; then
    . "$HOME/.mavenrc"
  fi
 fi
 # OS specific support.  $var _must_ be set to either true or false.
 cygwin=false;
 darwin=false;
 mingw=false
 case "`uname`" in
  CYGWIN*) cygwin=true ;;
  MINGW*) mingw=true;;
  Darwin*) darwin=true
    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
    if [ -z "$JAVA_HOME" ]; then
      if [ -x "/usr/libexec/java_home" ]; then
        export JAVA_HOME="`/usr/libexec/java_home`"
      else
        export JAVA_HOME="/Library/Java/Home"
      fi
    fi
    ;;
 esac
 if [ -z "$JAVA_HOME" ] ; then
  if [ -r /etc/gentoo-release ] ; then
    JAVA_HOME=`java-config --jre-home`
  fi
 fi
 if [ -z "$M2_HOME" ] ; then
  ## resolve links - $0 may be a link to maven's home
  PRG="$0"
  # need this for relative symlinks
  while [ -h "$PRG" ] ; do
    ls=`ls -ld "$PRG"`
    link=`expr "$ls" : '.*-> \(.*\)$'`
    if expr "$link" : '/.*' > /dev/null; then
      PRG="$link"
    else
      PRG="`dirname "$PRG"`/$link"
    fi
  done
  saveddir=`pwd`
  M2_HOME=`dirname "$PRG"`/..
  # make it fully qualified
  M2_HOME=`cd "$M2_HOME" && pwd`
  cd "$saveddir"
  # echo Using m2 at $M2_HOME
 fi
 # For Cygwin, ensure paths are in UNIX format before anything is touched
 if $cygwin ; then
  [ -n "$M2_HOME" ] &&
    M2_HOME=`cygpath --unix "$M2_HOME"`
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=`cygpath --unix "$JAVA_HOME"`
  [ -n "$CLASSPATH" ] &&
    CLASSPATH=`cygpath --path --unix "$CLASSPATH"`
 fi
 # For Mingw, ensure paths are in UNIX format before anything is touched
 if $mingw ; then
  [ -n "$M2_HOME" ] &&
    M2_HOME="`(cd "$M2_HOME"; pwd)`"
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME="`(cd "$JAVA_HOME"; pwd)`"
 fi
 if [ -z "$JAVA_HOME" ]; then
  javaExecutable="`which javac`"
  if [ -n "$javaExecutable" ] && ! [ "`expr \"$javaExecutable\" : '\([^ ]*\)'`" = "no" ]; then
    # readlink(1) is not available as standard on Solaris 10.
    readLink=`which readlink`
    if [ ! `expr "$readLink" : '\([^ ]*\)'` = "no" ]; then
      if $darwin ; then
        javaHome="`dirname \"$javaExecutable\"`"
        javaExecutable="`cd \"$javaHome\" && pwd -P`/javac"
      else
        javaExecutable="`readlink -f \"$javaExecutable\"`"
      fi
      javaHome="`dirname \"$javaExecutable\"`"
      javaHome=`expr "$javaHome" : '\(.*\)/bin'`
      JAVA_HOME="$javaHome"
      export JAVA_HOME
    fi
  fi
 fi
 if [ -z "$JAVACMD" ] ; then
  if [ -n "$JAVA_HOME"  ] ; then
    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
      # IBM's JDK on AIX uses strange locations for the executables
      JAVACMD="$JAVA_HOME/jre/sh/java"
    else
      JAVACMD="$JAVA_HOME/bin/java"
    fi
  else
    JAVACMD="`which java`"
  fi
 fi
 if [ ! -x "$JAVACMD" ] ; then
  echo "Error: JAVA_HOME is not defined correctly." >&2
  echo "  We cannot execute $JAVACMD" >&2
  exit 1
 fi
 if [ -z "$JAVA_HOME" ] ; then
  echo "Warning: JAVA_HOME environment variable is not set."
 fi
 CLASSWORLDS_LAUNCHER=org.codehaus.plexus.classworlds.launcher.Launcher
 # traverses directory structure from process work directory to filesystem root
 # first directory with .mvn subdirectory is considered project base directory
 find_maven_basedir() {
  if [ -z "$1" ]
  then
    echo "Path not specified to find_maven_basedir"
    return 1
  fi
  basedir="$1"
  wdir="$1"
  while [ "$wdir" != '/' ] ; do
    if [ -d "$wdir"/.mvn ] ; then
      basedir=$wdir
      break
    fi
    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
    if [ -d "${wdir}" ]; then
      wdir=`cd "$wdir/.."; pwd`
    fi
    # end of workaround
  done
  echo "${basedir}"
 }
 # concatenates all lines of a file
 concat_lines() {
  if [ -f "$1" ]; then
    echo "$(tr -s '\n' ' ' < "$1")"
  fi
 }
 BASE_DIR=`find_maven_basedir "$(pwd)"`
 if [ -z "$BASE_DIR" ]; then
  exit 1;
 fi
 ##########################################################################################
 # Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
 # This allows using the maven wrapper in projects that prohibit checking in binary data.
 ##########################################################################################
 if [ -r "$BASE_DIR/.mvn/wrapper/maven-wrapper.jar" ]; then
    if [ "$MVNW_VERBOSE" = true ]; then
      echo "Found .mvn/wrapper/maven-wrapper.jar"
    fi
 else
    if [ "$MVNW_VERBOSE" = true ]; then
      echo "Couldn't find .mvn/wrapper/maven-wrapper.jar, downloading it ..."
    fi
    if [ -n "$MVNW_REPOURL" ]; then
      jarUrl="$MVNW_REPOURL/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
    else
      jarUrl="https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar"
    fi
    while IFS="=" read key value; do
      case "$key" in (wrapperUrl) jarUrl="$value"; break ;;
      esac
    done < "$BASE_DIR/.mvn/wrapper/maven-wrapper.properties"
    if [ "$MVNW_VERBOSE" = true ]; then
      echo "Downloading from: $jarUrl"
    fi
    wrapperJarPath="$BASE_DIR/.mvn/wrapper/maven-wrapper.jar"
    if $cygwin; then
      wrapperJarPath=`cygpath --path --windows "$wrapperJarPath"`
    fi
    if command -v wget > /dev/null; then
        if [ "$MVNW_VERBOSE" = true ]; then
          echo "Found wget ... using wget"
        fi
        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
            wget "$jarUrl" -O "$wrapperJarPath"
        else
            wget --http-user=$MVNW_USERNAME --http-password=$MVNW_PASSWORD "$jarUrl" -O "$wrapperJarPath"
        fi
    elif command -v curl > /dev/null; then
        if [ "$MVNW_VERBOSE" = true ]; then
          echo "Found curl ... using curl"
        fi
        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
            curl -o "$wrapperJarPath" "$jarUrl" -f
        else
            curl --user $MVNW_USERNAME:$MVNW_PASSWORD -o "$wrapperJarPath" "$jarUrl" -f
        fi
    else
        if [ "$MVNW_VERBOSE" = true ]; then
          echo "Falling back to using Java to download"
        fi
        javaClass="$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.java"
        # For Cygwin, switch paths to Windows format before running javac
        if $cygwin; then
          javaClass=`cygpath --path --windows "$javaClass"`
        fi
        if [ -e "$javaClass" ]; then
            if [ ! -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
                if [ "$MVNW_VERBOSE" = true ]; then
                  echo " - Compiling MavenWrapperDownloader.java ..."
                fi
                # Compiling the Java class
                ("$JAVA_HOME/bin/javac" "$javaClass")
            fi
            if [ -e "$BASE_DIR/.mvn/wrapper/MavenWrapperDownloader.class" ]; then
                # Running the downloader
                if [ "$MVNW_VERBOSE" = true ]; then
                  echo " - Running MavenWrapperDownloader.java ..."
                fi
                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$MAVEN_PROJECTBASEDIR")
            fi
        fi
    fi
 fi
 ##########################################################################################
 # End of extension
 ##########################################################################################
 export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
 if [ "$MVNW_VERBOSE" = true ]; then
  echo $MAVEN_PROJECTBASEDIR
 fi
 MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"
 # For Cygwin, switch paths to Windows format before running java
 if $cygwin; then
  [ -n "$M2_HOME" ] &&
    M2_HOME=`cygpath --path --windows "$M2_HOME"`
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=`cygpath --path --windows "$JAVA_HOME"`
  [ -n "$CLASSPATH" ] &&
    CLASSPATH=`cygpath --path --windows "$CLASSPATH"`
  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
    MAVEN_PROJECTBASEDIR=`cygpath --path --windows "$MAVEN_PROJECTBASEDIR"`
 fi
 # Provide a "standardized" way to retrieve the CLI args that will
 # work with both Windows and non-Windows executions.
 MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $@"
 export MAVEN_CMD_LINE_ARGS
 WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
 exec "$JAVACMD" \
  $MAVEN_OPTS \
  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
  "-Dmaven.home=${M2_HOME}" "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"
--- a/spring-boot/zero-downtime/mvnw.cmd
+++ b/spring-boot/zero-downtime/mvnw.cmd
@@ -0,0 +1,182 @@
@REM ----------------------------------------------------------------------------
@REM Licensed to the Apache Software Foundation (ASF) under one
@REM or more contributor license agreements.  See the NOTICE file
@REM distributed with this work for additional information
@REM regarding copyright ownership.  The ASF licenses this file
@REM to you under the Apache License, Version 2.0 (the
@REM "License"); you may not use this file except in compliance
@REM with the License.  You may obtain a copy of the License at
@REM
@REM    https://www.apache.org/licenses/LICENSE-2.0
@REM
@REM Unless required by applicable law or agreed to in writing,
@REM software distributed under the License is distributed on an
@REM "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@REM KIND, either express or implied.  See the License for the
@REM specific language governing permissions and limitations
@REM under the License.
@REM ----------------------------------------------------------------------------
@REM ----------------------------------------------------------------------------
@REM Maven Start Up Batch script
@REM
@REM Required ENV vars:
@REM JAVA_HOME - location of a JDK home dir
@REM
@REM Optional ENV vars
@REM M2_HOME - location of maven2's installed home dir
@REM MAVEN_BATCH_ECHO - set to 'on' to enable the echoing of the batch commands
@REM MAVEN_BATCH_PAUSE - set to 'on' to wait for a keystroke before ending
@REM MAVEN_OPTS - parameters passed to the Java VM when running Maven
@REM     e.g. to debug Maven itself, use
@REM set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
@REM MAVEN_SKIP_RC - flag to disable loading of mavenrc files
@REM ----------------------------------------------------------------------------
@REM Begin all REM lines with '@' in case MAVEN_BATCH_ECHO is 'on'
@echo off
@REM set title of command window
 title %0
@REM enable echoing by setting MAVEN_BATCH_ECHO to 'on'
@if "%MAVEN_BATCH_ECHO%" == "on"  echo %MAVEN_BATCH_ECHO%
@REM set %HOME% to equivalent of $HOME
 if "%HOME%" == "" (set "HOME=%HOMEDRIVE%%HOMEPATH%")
@REM Execute a customer 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%
--- a/spring-boot/zero-downtime/pom.xml
+++ b/spring-boot/zero-downtime/pom.xml
@@ -0,0 +1,63 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
 	<modelVersion>4.0.0</modelVersion>
 	<parent>
 		<groupId>org.springframework.boot</groupId>
 		<artifactId>spring-boot-starter-parent</artifactId>
 		<version>2.5.2</version>
 		<relativePath/> <!-- lookup parent from repository -->
 	</parent>
 	<groupId>io.reflectoring</groupId>
 	<artifactId>zero-downtime</artifactId>
 	<version>0.0.1-SNAPSHOT</version>
 	<name>zero-downtime</name>
 	<description>Demo project to showcase zero downtime deployment</description>
 	<properties>
 		<java.version>11</java.version>
 	</properties>
 	<dependencies>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-data-jdbc</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
 		<dependency>
 			<groupId>org.flywaydb</groupId>
 			<artifactId>flyway-core</artifactId>
 		</dependency>
 		<dependency>
 			<groupId>com.h2database</groupId>
 			<artifactId>h2</artifactId>
 		</dependency>
 		<!-- LAUNCHDARKLY -->
 		<dependency>
 			<groupId>com.launchdarkly</groupId>
 			<artifactId>launchdarkly-java-server-sdk</artifactId>
 			<version>5.3.0</version>
 		</dependency>
 	</dependencies>
 	<build>
 		<plugins>
 			<plugin>
 				<groupId>org.springframework.boot</groupId>
 				<artifactId>spring-boot-maven-plugin</artifactId>
 			</plugin>
 		</plugins>
 	</build>
 </project>
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/CustomerController.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/CustomerController.java
@@ -0,0 +1,64 @@
 package io.reflectoring.zerodowntime;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.PathVariable;
 import org.springframework.web.bind.annotation.RestController;
 import java.util.Optional;
@RestController
 public class CustomerController {
    private final CustomerRepository oldCustomerRepository;
    private final NewCustomerRepository newCustomerRepository;
    private final FeatureFlagService featureFlagService;
    public CustomerController(CustomerRepository oldCustomerRepository, NewCustomerRepository newCustomerRepository, FeatureFlagService featureFlagService) {
        this.oldCustomerRepository = oldCustomerRepository;
        this.newCustomerRepository = newCustomerRepository;
        this.featureFlagService = featureFlagService;
    }
    @GetMapping("/customers/create")
    String createCustomer() {
        if (featureFlagService.writeToNewCustomerSchema()) {
            NewCustomer customer = new NewCustomer("Bob", "Builder", "Build Street", "21");
            newCustomerRepository.save(customer);
        } else {
            OldCustomer customer = new OldCustomer("Bob", "Builder", "21 Build Street");
            oldCustomerRepository.save(customer);
        }
        return "customer created";
    }
    @GetMapping("/customers/{id}}")
    String getCustomer(@PathVariable("id") Long id) {
        if (featureFlagService.readFromNewCustomerSchema()) {
            Optional<NewCustomer> customer = newCustomerRepository.findById(id);
            return customer.get().toString();
        } else {
            Optional<OldCustomer> customer = oldCustomerRepository.findById(id);
            return customer.get().toString();
        }
    }
    @GetMapping("/customers/list")
    String getCustomer() {
        StringBuffer buffer = new StringBuffer();
        if (featureFlagService.readFromNewCustomerSchema()) {
            Iterable<NewCustomer> customers = newCustomerRepository.findAll();
            for (NewCustomer customer : customers) {
                buffer.append("\n");
                buffer.append(customer.toString());
            }
        } else {
            Iterable<OldCustomer> customers = oldCustomerRepository.findAll();
            for (OldCustomer customer : customers) {
                buffer.append("\n");
                buffer.append(customer.toString());
            }
        }
        return buffer.toString();
    }
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/CustomerRepository.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/CustomerRepository.java
@@ -0,0 +1,6 @@
 package io.reflectoring.zerodowntime;
 import org.springframework.data.repository.CrudRepository;
 public interface CustomerRepository extends CrudRepository<OldCustomer, Long> {
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/FeatureFlagService.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/FeatureFlagService.java
@@ -0,0 +1,24 @@
 package io.reflectoring.zerodowntime;
 import com.launchdarkly.sdk.LDUser;
 import com.launchdarkly.sdk.server.LDClient;
 import org.springframework.stereotype.Component;
@Component
 public class FeatureFlagService {
    private final LDClient launchdarklyClient;
    public FeatureFlagService(LDClient launchdarklyClient) {
        this.launchdarklyClient = launchdarklyClient;
    }
    public Boolean writeToNewCustomerSchema() {
        return true;
    }
    public Boolean readFromNewCustomerSchema() {
        return false;
    }
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/FlywayConfiguration.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/FlywayConfiguration.java
@@ -0,0 +1,19 @@
 package io.reflectoring.zerodowntime;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.springframework.boot.autoconfigure.flyway.FlywayMigrationStrategy;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
@Configuration
 class FlywayConfiguration {
    private final static Logger logger = LoggerFactory.getLogger(FlywayConfiguration.class);
    @Bean
    FlywayMigrationStrategy flywayStrategy() {
        return flyway -> logger.info("Flyway migration on startup is disabled! Call the endpoint /flywayMigrate instead.");
    }
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/FlywayController.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/FlywayController.java
@@ -0,0 +1,22 @@
 package io.reflectoring.zerodowntime;
 import org.flywaydb.core.Flyway;
 import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RestController;
@RestController
 class FlywayController {
    private final Flyway flyway;
    public FlywayController(Flyway flyway) {
        this.flyway = flyway;
    }
    @GetMapping("/flywayMigrate")
    String flywayMigrate() {
        flyway.migrate();
        return "success";
    }
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/LaunchDarklyConfiguration.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/LaunchDarklyConfiguration.java
@@ -0,0 +1,27 @@
 package io.reflectoring.zerodowntime;
 import com.launchdarkly.sdk.server.LDClient;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
 import javax.annotation.PreDestroy;
 import java.io.IOException;
@Configuration
 public class LaunchDarklyConfiguration {
    private LDClient launchdarklyClient;
    @Bean
    public LDClient launchdarklyClient(@Value("${launchdarkly.sdkKey}") String sdkKey) {
        this.launchdarklyClient = new LDClient(sdkKey);
        return this.launchdarklyClient;
    }
    @PreDestroy
    public void destroy() throws IOException {
        this.launchdarklyClient.close();
    }
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/NewCustomer.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/NewCustomer.java
@@ -0,0 +1,34 @@
 package io.reflectoring.zerodowntime;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.relational.core.mapping.Table;
@Table("CUSTOMER")
 public class NewCustomer {
    @Id
    private long id;
    private String firstName;
    private String lastName;
    private String addressStreet;
    private String addressStreetNumber;
    public NewCustomer(String firstName, String lastName, String addressStreet, String addressStreetNumber) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.addressStreet = addressStreet;
        this.addressStreetNumber = addressStreetNumber;
    }
    @Override
    public String toString() {
        return "NewCustomer{" +
                "id=" + id +
                ", firstName='" + firstName + '\'' +
                ", lastName='" + lastName + '\'' +
                ", addressStreet='" + addressStreet + '\'' +
                ", addressStreetNumber='" + addressStreetNumber + '\'' +
                '}';
    }
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/NewCustomerRepository.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/NewCustomerRepository.java
@@ -0,0 +1,6 @@
 package io.reflectoring.zerodowntime;
 import org.springframework.data.repository.CrudRepository;
 public interface NewCustomerRepository extends CrudRepository<NewCustomer, Long> {
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/OldCustomer.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/OldCustomer.java
@@ -0,0 +1,31 @@
 package io.reflectoring.zerodowntime;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.relational.core.mapping.Table;
@Table("CUSTOMER")
 public class OldCustomer {
    @Id
    private long id;
    private String firstName;
    private String lastName;
    private String address;
    public OldCustomer(String firstName, String lastName, String address) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.address = address;
    }
    @Override
    public String toString() {
        return "OldCustomer{" +
                "id=" + id +
                ", firstName='" + firstName + '\'' +
                ", lastName='" + lastName + '\'' +
                ", address='" + address + '\'' +
                '}';
    }
 }
--- a/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/ZeroDowntimeApplication.java
+++ b/spring-boot/zero-downtime/src/main/java/io/reflectoring/zerodowntime/ZeroDowntimeApplication.java
@@ -0,0 +1,17 @@
 package io.reflectoring.zerodowntime;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 import org.springframework.data.jdbc.repository.config.EnableJdbcRepositories;
 import org.springframework.web.servlet.config.annotation.EnableWebMvc;
@SpringBootApplication
@EnableJdbcRepositories
@EnableWebMvc
 public class ZeroDowntimeApplication {
 	public static void main(String[] args) {
 		SpringApplication.run(ZeroDowntimeApplication.class, args);
 	}
 }
--- a/spring-boot/zero-downtime/src/main/resources/application.yml
+++ b/spring-boot/zero-downtime/src/main/resources/application.yml
@@ -0,0 +1,12 @@
 spring.datasource.url: "jdbc:h2:file:~/testdb"
 spring.datasource.driverClassName: org.h2.Driver
 spring.datasource.username:
 spring.datasource.password:
 spring.jpa.database-platform: org.hibernate.dialect.H2Dialect
 spring:
  h2:
    console:
      enabled: true
 launchdarkly:
  sdkKey: <YOUR-SDK-KEY>
--- a/spring-boot/zero-downtime/src/main/resources/db/migration/V001__create_table_user.sql
+++ b/spring-boot/zero-downtime/src/main/resources/db/migration/V001__create_table_user.sql
@@ -0,0 +1,7 @@
 create table customer (
    id serial unique,
    first_name varchar(100),
    last_name varchar(100),
    address varchar(255),
    primary key (id)
 );
--- a/spring-boot/zero-downtime/src/main/resources/db/migration/V002__add_address_columns.sql
+++ b/spring-boot/zero-downtime/src/main/resources/db/migration/V002__add_address_columns.sql
@@ -0,0 +1,2 @@
 alter table customer add column address_street varchar(100) null;
 alter table customer add column address_street_number varchar(100) null;
--- a/spring-boot/zero-downtime/src/test/java/io/reflectoring/zerodowntime/ZeroDowntimeApplicationTests.java
+++ b/spring-boot/zero-downtime/src/test/java/io/reflectoring/zerodowntime/ZeroDowntimeApplicationTests.java
@@ -0,0 +1,13 @@
 package io.reflectoring.zerodowntime;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
@SpringBootTest
 class ZeroDowntimeApplicationTests {
 	@Test
 	void contextLoads() {
 	}
 }
--- a/spring-data/spring-data-rest-springfox/build.gradle
+++ b/spring-data/spring-data-rest-springfox/build.gradle
@@ -27,9 +27,9 @@ repositories {
 dependencies {
 	compile('org.springframework.boot:spring-boot-starter-data-jpa')
 	compile('org.springframework.boot:spring-boot-starter-data-rest')
-	compile('io.springfox:springfox-data-rest:2.7.1-SNAPSHOT')
+	compile('io.springfox:springfox-data-rest:2.8.0')
-	compile('io.springfox:springfox-swagger2:2.7.1-SNAPSHOT')
+	compile('io.springfox:springfox-swagger2:2.8.0')
-	compile('io.springfox:springfox-swagger-ui:2.7.1-SNAPSHOT')
+	compile('io.springfox:springfox-swagger-ui:2.8.0')
 	compile('com.h2database:h2:1.4.196')
 	testCompile('org.springframework.boot:spring-boot-starter-test')
 }
Author	SHA1	Message	Date
Tom Hombergs	64499f5582	code example for structured logging	2021-08-16 20:22:15 +10:00
Tom Hombergs	946a9de553	Merge branch 'master' into zero-downtime # Conflicts: # build-all.sh	2021-08-04 06:41:55 +10:00
Tom Hombergs	bf004661b0	zero-downtime example	2021-08-04 06:35:11 +10:00
Tom Hombergs	9cb21ffb8a	zero-downtime example	2021-08-04 06:33:55 +10:00
Tom Hombergs	375928575c	zero-downtime example	2021-08-04 06:33:14 +10:00
Tom Hombergs	36a5bdda1e	Merge pull request #102 from pratikdas/csrf CSRF Code examples	2021-07-31 12:37:06 +10:00
Tom Hombergs	d0b88ace16	.properties -> .yml	2021-07-24 06:51:49 +10:00
Tom Hombergs	2e74db8684	wip	2021-07-24 06:44:33 +10:00
Tom Hombergs	597844a483	Merge pull request #101 from saajn/spring-resilience Examples for the Spring Boot Resilience4j article	2021-07-24 06:22:35 +10:00
Pratik Das	3c934fd394	added code	2021-07-22 15:14:26 +05:30
Saajan	c66d4bd7d7	Added readme file and updated build-all	2021-07-21 15:41:06 +05:30
Saajan	5deb6fb09c	Initial commit	2021-07-21 15:34:24 +05:30
Tom Hombergs	55dfc429cb	remove snapshot dependency	2021-07-18 10:56:49 +10:00
Tom Hombergs	5a9e2751db	Merge remote-tracking branch 'origin/master'	2021-07-18 10:47:30 +10:00
Tom Hombergs	9e6f17cf1e	remove snapshot dependency	2021-07-18 10:47:25 +10:00
Tom Hombergs	e7c95ea2e4	Merge pull request #99 from pratikdas/cors cors	2021-07-18 10:19:09 +10:00
Tom Hombergs	16815980a9	Merge remote-tracking branch 'origin/master' # Conflicts: # spring-boot/feature-flags/.mvn/wrapper/MavenWrapperDownloader.java # spring-boot/feature-flags/.mvn/wrapper/maven-wrapper.properties	2021-07-17 07:06:33 +10:00
Tom Hombergs	d49982299d	add Maven Wrapper	2021-07-17 07:06:23 +10:00
Tom Hombergs	cf7ecd5f4f	zero-downtime example	2021-07-17 07:05:13 +10:00
Pratik Das	406a57d203	added code	2021-07-05 18:09:25 +05:30
Tom Hombergs	a0c58111ec	Merge pull request #98 from thombergs/feature-flags feature flags	2021-07-04 10:03:32 +10:00
		`@@ -0,0 +1,3 @@`
							`# Related Blog Posts`

							`* [Complete guide to CORS](https://reflectoring.io/complete-guide-to-cors/)`
		`@@ -0,0 +1,3 @@`
							`# Related Blog Posts`

							`* [Complete guide to CSRF](https://reflectoring.io/complete-guide-to-csrf/)`
		`@@ -0,0 +1,2 @@`
							`distributionUrl=https://repo.maven.apache.org/maven2/org/apache/maven/apache-maven/3.8.1/apache-maven-3.8.1-bin.zip`
							`wrapperUrl=https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.5.6/maven-wrapper-0.5.6.jar`
		`@@ -0,0 +1,2 @@`
							`alter table customer add column address_street varchar(100) null;`
							`alter table customer add column address_street_number varchar(100) null;`