Merge pull request #80 from saajn/actuator2

Examples for the Actuator article

build-all.sh

@@ -86,6 +86,7 @@ if [[ "$MODULE" == "module5" ]]
 then
   # ADD NEW MODULES HERE
   # (add new modules above the rest so you get quicker feedback if it fails)
+  build_maven_module "spring-boot/spring-boot-actuator"
   build_maven_module "mockito"
   build_maven_module "core-java/service-provider-interface"
   build_gradle_module "spring-boot/hazelcast/hazelcast-embedded-cache"

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

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

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

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

spring-boot/spring-boot-actuator/README.md

@@ -0,0 +1,8 @@
+# Exploring a Spring Boot App with Actuator and jq
+
+Run the DemoApplication program.
+
+## Blog posts
+
+* [Exploring a Spring Boot App with Actuator and jq](https://reflectoring.io/exploring-a-spring-boot-app-with-actuator-and-jq)
+

spring-boot/spring-boot-actuator/mvnw

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

spring-boot/spring-boot-actuator/mvnw.cmd

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

spring-boot/spring-boot-actuator/pom.xml

@@ -0,0 +1,59 @@
+<?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>2.4.4</version>
+		<relativePath/> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>io.reflectoring.springboot.actuator</groupId>
+	<artifactId>actuator-examples</artifactId>
+	<version>0.0.1-SNAPSHOT</version>
+	<name>actuator-examples</name>
+	<description>Demo project for Spring Boot Actuator</description>
+	<properties>
+		<java.version>11</java.version>
+	</properties>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-actuator</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<optional>true</optional>
+		</dependency>
+		<dependency>
+			<groupId>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>
+				<configuration>
+					<excludes>
+						<exclude>
+							<groupId>org.projectlombok</groupId>
+							<artifactId>lombok</artifactId>
+						</exclude>
+					</excludes>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+</project>

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/DemoApplication.java

@@ -0,0 +1,19 @@
+package io.reflectoring.springboot.actuator;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.context.metrics.buffering.BufferingApplicationStartup;
+import org.springframework.cache.annotation.EnableCaching;
+import org.springframework.scheduling.annotation.EnableScheduling;
+
+@SpringBootApplication
+@EnableScheduling
+@EnableCaching
+public class DemoApplication {
+
+	public static void main(String[] args) {
+		SpringApplication app = new SpringApplication(DemoApplication.class);
+		app.setApplicationStartup(new BufferingApplicationStartup(2048));
+		app.run(args);
+	}
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/controllers/OrderController.java

@@ -0,0 +1,75 @@
+package io.reflectoring.springboot.actuator.controllers;
+
+import io.micrometer.core.instrument.MeterRegistry;
+import io.reflectoring.springboot.actuator.model.Order;
+import io.reflectoring.springboot.actuator.model.OrderCreatedResponse;
+import io.reflectoring.springboot.actuator.model.OrderLineItem;
+import io.reflectoring.springboot.actuator.services.OrderService;
+import java.util.Arrays;
+import java.util.List;
+import java.util.UUID;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class OrderController {
+  @Autowired
+  private OrderService orderService;
+
+  @Autowired
+  private MeterRegistry registry;
+
+
+  @GetMapping("/{customerId}/orders")
+  public List<Order> getOrders(@PathVariable(value = "customerId") String customerId) {
+    System.out.println("Get orders requested for customer: " + customerId);
+
+    // Dummy order history for example purpose
+    OrderLineItem orderLineItem1 = new OrderLineItem();
+    orderLineItem1.setProductId(UUID.randomUUID().toString());
+    orderLineItem1.setQuantity(10);
+
+    OrderLineItem orderLineItem2 = new OrderLineItem();
+    orderLineItem2.setProductId(UUID.randomUUID().toString());
+    orderLineItem2.setQuantity(12);
+
+    OrderLineItem orderLineItem3 = new OrderLineItem();
+    orderLineItem3.setProductId(UUID.randomUUID().toString());
+    orderLineItem3.setQuantity(5);
+
+
+    OrderLineItem orderLineItem4 = new OrderLineItem();
+    orderLineItem4.setProductId(UUID.randomUUID().toString());
+    orderLineItem4.setQuantity(25);
+
+    OrderLineItem orderLineItem5 = new OrderLineItem();
+    orderLineItem5.setProductId(UUID.randomUUID().toString());
+    orderLineItem5.setQuantity(20);
+
+    OrderLineItem orderLineItem6 = new OrderLineItem();
+    orderLineItem6.setProductId(UUID.randomUUID().toString());
+    orderLineItem6.setQuantity(4);
+
+    return Arrays.asList(new Order(customerId, Arrays.asList(orderLineItem1, orderLineItem2)),
+        new Order(customerId, Arrays.asList(orderLineItem3)),
+        new Order(customerId, Arrays.asList(orderLineItem4, orderLineItem5, orderLineItem6)));
+  }
+
+  @PostMapping("/{customerId}/orders")
+  public OrderCreatedResponse placeOrder(@PathVariable(value = "customerId") String customerId,
+      @RequestBody Order order) {
+    System.out.println("Place order requested for customer: " + customerId);
+
+    registry.counter("orders.placed.counter").increment();
+
+    OrderCreatedResponse response = new OrderCreatedResponse();
+    response.setOrderId(UUID.randomUUID().toString());
+    response.setCustomerId(customerId);
+
+    return response;
+  }
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/controllers/PaymentController.java

@@ -0,0 +1,29 @@
+package io.reflectoring.springboot.actuator.controllers;
+
+import io.reflectoring.springboot.actuator.enums.PaymentStatus;
+import io.reflectoring.springboot.actuator.model.PaymentRequest;
+import io.reflectoring.springboot.actuator.model.PaymentResponse;
+import io.reflectoring.springboot.actuator.services.PaymentService;
+import java.util.UUID;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class PaymentController {
+  @Autowired
+  private PaymentService paymentService;
+
+  @PostMapping("/{orderId}/payment")
+  public PaymentResponse processPayments(@PathVariable String orderId, @RequestBody PaymentRequest request) {
+    System.out.println("Processing payment for order: " + orderId);
+
+    PaymentResponse response = new PaymentResponse();
+    response.setPaymentTransactionId(UUID.randomUUID().toString());
+    response.setStatus(PaymentStatus.SUCCESS);
+
+    return response;
+  }
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/controllers/ShippingController.java

@@ -0,0 +1,33 @@
+package io.reflectoring.springboot.actuator.controllers;
+
+import io.reflectoring.springboot.actuator.model.ShippingPriceResponse;
+import io.reflectoring.springboot.actuator.services.ShippingService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.event.ContextRefreshedEvent;
+import org.springframework.context.event.EventListener;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+public class ShippingController {
+  @Autowired
+  private ShippingService shippingService;
+
+  @GetMapping("/shipping-price")
+  public ShippingPriceResponse getShippingPrice(@RequestParam(value = "stateCode") String stateCode) {
+    System.out.println("Shipping price API called");
+     ShippingPriceResponse response = new ShippingPriceResponse();
+     response.setAmount(shippingService.getShippingPriceByState(stateCode));
+     response.setStateCode(stateCode);
+     return response;
+  }
+
+  @EventListener
+  void preloadCaches(ContextRefreshedEvent event) {
+    System.out.println("Preloading caches");
+    System.out.println(shippingService.getStates());
+    System.out.println(shippingService.getShippingPriceByState("TX"));
+    System.out.println(shippingService.getShippingPriceByState("VA"));
+  }
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/enums/PaymentMode.java

@@ -0,0 +1,5 @@
+package io.reflectoring.springboot.actuator.enums;
+
+public enum PaymentMode {
+  CASH, CREDIT_CARD, DEBIT_CARD, GIFT_CARD, COUPON
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/enums/PaymentStatus.java

@@ -0,0 +1,5 @@
+package io.reflectoring.springboot.actuator.enums;
+
+public enum PaymentStatus {
+  SUCCESS, FAILED, PENDING
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/model/Order.java

@@ -0,0 +1,15 @@
+package io.reflectoring.springboot.actuator.model;
+
+import java.util.List;
+import lombok.Data;
+
+@Data
+public class Order {
+  String customerId;
+  List<OrderLineItem> lineItems;
+
+  public Order(String customerId, List<OrderLineItem> lineItems) {
+    this.customerId = customerId;
+    this.lineItems = lineItems;
+  }
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/model/OrderCreatedResponse.java

@@ -0,0 +1,9 @@
+package io.reflectoring.springboot.actuator.model;
+
+import lombok.Data;
+
+@Data
+public class OrderCreatedResponse {
+  String customerId;
+  String orderId;
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/model/OrderLineItem.java

@@ -0,0 +1,9 @@
+package io.reflectoring.springboot.actuator.model;
+
+import lombok.Data;
+
+@Data
+public class OrderLineItem {
+  String productId;
+  Integer quantity;
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/model/PaymentRequest.java

@@ -0,0 +1,11 @@
+package io.reflectoring.springboot.actuator.model;
+
+import io.reflectoring.springboot.actuator.enums.PaymentMode;
+import lombok.Data;
+
+@Data
+public class PaymentRequest {
+  String orderId;
+  PaymentMode paymentMode;
+  double amount;
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/model/PaymentResponse.java

@@ -0,0 +1,10 @@
+package io.reflectoring.springboot.actuator.model;
+
+import io.reflectoring.springboot.actuator.enums.PaymentStatus;
+import lombok.Data;
+
+@Data
+public class PaymentResponse {
+  String paymentTransactionId;
+  PaymentStatus status;
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/model/ShippingPriceResponse.java

@@ -0,0 +1,9 @@
+package io.reflectoring.springboot.actuator.model;
+
+import lombok.Data;
+
+@Data
+public class ShippingPriceResponse {
+  String stateCode;
+  Double amount;
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/repositories/OrderRepository.java

@@ -0,0 +1,8 @@
+package io.reflectoring.springboot.actuator.repositories;
+
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class OrderRepository {
+
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/repositories/PaymentRepository.java

@@ -0,0 +1,8 @@
+package io.reflectoring.springboot.actuator.repositories;
+
+import org.springframework.stereotype.Repository;
+
+@Repository
+public class PaymentRepository {
+
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/services/InventoryService.java

@@ -0,0 +1,8 @@
+package io.reflectoring.springboot.actuator.services;
+
+import org.springframework.stereotype.Service;
+
+@Service
+public class InventoryService {
+
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/services/OrderService.java

@@ -0,0 +1,21 @@
+package io.reflectoring.springboot.actuator.services;
+
+import io.reflectoring.springboot.actuator.repositories.OrderRepository;
+import javax.annotation.PostConstruct;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class OrderService {
+  @Autowired
+  private OrderRepository orderRepository;
+
+  @PostConstruct
+  void loadCache() {
+    try {
+      Thread.sleep(1000);
+    } catch (InterruptedException e) {
+      e.printStackTrace();
+    }
+  }
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/services/PaymentService.java

@@ -0,0 +1,12 @@
+package io.reflectoring.springboot.actuator.services;
+
+import io.reflectoring.springboot.actuator.repositories.PaymentRepository;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class PaymentService {
+  @Autowired
+  private PaymentRepository repository;
+
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/services/ShippingService.java

@@ -0,0 +1,77 @@
+package io.reflectoring.springboot.actuator.services;
+
+import java.util.Arrays;
+import java.util.List;
+import org.springframework.cache.annotation.Cacheable;
+import org.springframework.stereotype.Service;
+
+@Service
+public class ShippingService {
+  @Cacheable(value = "shippingPrices")
+  public Double getShippingPriceByState(String stateCode) {
+    System.out.println("Shipping price requested for state: " + stateCode);
+
+    if (stateCode.equals("TX")) {
+      return 20.0;
+    }
+    if(stateCode.equals("WA")) {
+      return 25.0;
+    }
+    return 10.0;
+  }
+
+  @Cacheable(value = "states")
+  public List<String> getStates() {
+    return Arrays.asList("Alabama",
+        "Alaska",
+        "Arizona",
+        "Arkansas",
+        "California",
+        "Colorado",
+        "Connecticut",
+        "Delaware",
+        "District Of Columbia",
+        "Florida",
+        "Georgia",
+        "Hawaii",
+        "Idaho",
+        "Illinois",
+        "Indiana",
+        "Iowa",
+        "Kansas",
+        "Kentucky",
+        "Louisiana",
+        "Maine",
+        "Maryland",
+        "Massachusetts",
+        "Michigan",
+        "Minnesota",
+        "Mississippi",
+        "Missouri",
+        "Montana",
+        "Nebraska",
+        "Nevada",
+        "New Hampshire",
+        "New Jersey",
+        "New Mexico",
+        "New York",
+        "North Carolina",
+        "North Dakota",
+        "Ohio",
+        "Oklahoma",
+        "Oregon",
+        "Pennsylvania",
+        "Rhode Island",
+        "South Carolina",
+        "South Dakota",
+        "Tennessee",
+        "Texas",
+        "Utah",
+        "Vermont",
+        "Virginia",
+        "Washington",
+        "West Virginia",
+        "Wisconsin",
+        "Wyoming");
+  }
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/services/tasks/CleanUpAbandonedBaskets.java

@@ -0,0 +1,19 @@
+package io.reflectoring.springboot.actuator.services.tasks;
+
+import java.util.Date;
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CleanUpAbandonedBaskets {
+
+  @Scheduled(fixedDelay = 900000)
+  public void process() {
+    System.out.println("Cleaning abandoned baskets, current time: " + new Date());
+    try {
+      Thread.sleep(1000);
+    } catch (InterruptedException e) {
+      e.printStackTrace();
+    }
+  }
+}

spring-boot/spring-boot-actuator/src/main/java/io/reflectoring/springboot/actuator/services/tasks/ReportGenerator.java

@@ -0,0 +1,12 @@
+package io.reflectoring.springboot.actuator.services.tasks;
+
+import org.springframework.scheduling.annotation.Scheduled;
+import org.springframework.stereotype.Component;
+
+@Component
+public class ReportGenerator {
+  @Scheduled(cron = "0 0 12 * * *")
+  public void generateReports() {
+    System.out.println("Generating reports");
+  }
+}

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

@@ -0,0 +1,4 @@
+#management.endpoint.metrics.enabled=false
+management.endpoints.web.exposure.include=mappings,beans,startup,env,scheduledtasks,caches,metrics,health
+
+

spring-boot/spring-boot-actuator/src/main/resources/sample.json

@@ -0,0 +1,33 @@
+{
+  "students": [
+    {
+      "name": "John",
+      "age": 10,
+      "grade": 3,
+      "subjects": [
+        "math",
+        "english"
+      ]
+    },
+    {
+      "name": "Jack",
+      "age": 10,
+      "grade": 3,
+      "subjects": [
+        "math",
+        "social science",
+        "painting"
+      ]
+    },
+    {
+      "name": "James",
+      "age": 11,
+      "grade": 5,
+      "subjects": [
+        "math",
+        "environmental science",
+        "english"
+      ]
+    }
+  ]
+}