Module for BAEL-3280 (#9329)

* Module for BAEL-3280

* update comment to make it more clear

* remove .gitignore file

* remove name tag

* fix typo

* change module name to a generic one

* add module to parent

spring-boot-modules/pom.xml

@@ -15,6 +15,7 @@
 
     <modules>
         <module>spring-boot</module>
+        <module>spring-boot-1</module>
         <module>spring-boot-admin</module>
         <module>spring-boot-angular</module>
         <module>spring-boot-annotations</module>

spring-boot-modules/spring-boot-1/.mvn/wrapper/maven-wrapper.properties

@@ -0,0 +1 @@
+distributionUrl=https://repo1.maven.org/maven2/org/apache/maven/apache-maven/3.5.2/apache-maven-3.5.2-bin.zip

spring-boot-modules/spring-boot-1/README.md

@@ -0,0 +1,6 @@
+## Spring Boot 1.x Actuator
+
+This module contains articles about Spring Boot Actuator in Spring Boot version 1.x.
+
+## Relevant articles:
+- [Spring Boot Actuator](https://www.baeldung.com/spring-boot-actuators)

spring-boot-modules/spring-boot-1/mvnw

@@ -0,0 +1,234 @@
+#!/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.
+# ----------------------------------------------------------------------------
+
+# ----------------------------------------------------------------------------
+# Maven2 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 Migwn, 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 "$JAVA_HOME"
+      pwd
+    ))"
+  # TODO classpath?
+fi
+
+if [ -z "$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
+
+export MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}
+echo $MAVEN_PROJECTBASEDIR
+MAVEN_OPTS="$(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 "$MAVEN_PROJECTBASEDIR")
+fi
+
+WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain
+
+exec "$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-modules/spring-boot-1/mvnw.cmd

@@ -0,0 +1,143 @@
+@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 Maven2 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 key stroke 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 enable echoing my 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
+
+%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-modules/spring-boot-1/pom.xml

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>spring-boot-1</artifactId>
+    <packaging>jar</packaging>
+    <description>Module for Spring Boot version 1.x</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-1</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-1</relativePath>
+    </parent>
+
+    <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-actuator</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

spring-boot-modules/spring-boot-1/src/main/java/com/baeldung/actuator/CustomEndpoint.java

@@ -0,0 +1,35 @@
+package com.baeldung.actuator;
+
+import org.springframework.boot.actuate.endpoint.Endpoint;
+import org.springframework.stereotype.Component;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@Component
+public class CustomEndpoint implements Endpoint<List<String>> {
+
+    @Override
+    public String getId() {
+        return "customEndpoint";
+    }
+
+    @Override
+    public boolean isEnabled() {
+        return true;
+    }
+
+    @Override
+    public boolean isSensitive() {
+        return true;
+    }
+
+    @Override
+    public List<String> invoke() {
+        // Custom logic to build the output
+        List<String> messages = new ArrayList<>();
+        messages.add("This is message 1");
+        messages.add("This is message 2");
+        return messages;
+    }
+}

spring-boot-modules/spring-boot-1/src/main/java/com/baeldung/actuator/HealthCheck.java

@@ -0,0 +1,23 @@
+package com.baeldung.actuator;
+
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.boot.actuate.health.HealthIndicator;
+import org.springframework.stereotype.Component;
+
+@Component("myHealthCheck")
+public class HealthCheck implements HealthIndicator {
+
+    @Override
+    public Health health() {
+        int errorCode = check(); // perform some specific health check
+        if (errorCode != 0) {
+            return Health.down().withDetail("Error Code", errorCode).build();
+        }
+        return Health.up().build();
+    }
+
+    public int check() {
+        // Our logic to check health
+        return 0;
+    }
+}

spring-boot-modules/spring-boot-1/src/main/java/com/baeldung/actuator/LoginServiceImpl.java

@@ -0,0 +1,28 @@
+package com.baeldung.actuator;
+
+import org.springframework.boot.actuate.metrics.CounterService;
+import org.springframework.stereotype.Service;
+
+import java.util.Arrays;
+
+@Service
+public class LoginServiceImpl {
+
+    private final CounterService counterService;
+
+    public LoginServiceImpl(CounterService counterService) {
+        this.counterService = counterService;
+    }
+
+    public boolean login(String userName, char[] password) {
+        boolean success;
+        if (userName.equals("admin") && Arrays.equals("secret".toCharArray(), password)) {
+            counterService.increment("counter.login.success");
+            success = true;
+        } else {
+            counterService.increment("counter.login.failure");
+            success = false;
+        }
+        return success;
+    }
+}

spring-boot-modules/spring-boot-1/src/main/java/com/baeldung/actuator/SpringBoot.java

@@ -0,0 +1,13 @@
+package com.baeldung.actuator;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBoot {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBoot.class, args);
+    }
+
+}

spring-boot-modules/spring-boot-1/src/main/resources/application.properties

@@ -0,0 +1,19 @@
+### server port
+server.port=8080
+#port used to expose actuator
+management.port=8081
+#CIDR allowed to hit actuator
+management.address=127.0.0.1
+# Actuator Configuration
+# customize /beans endpoint
+endpoints.beans.id=springbeans
+endpoints.beans.sensitive=false
+endpoints.beans.enabled=true
+# for the Spring Boot version 1.5.0 and above, we have to disable security to expose the health endpoint fully for unauthorized access.
+# see: https://docs.spring.io/spring-boot/docs/1.5.x/reference/html/production-ready-monitoring.html
+management.security.enabled=false
+endpoints.health.sensitive=false
+# customize /info endpoint
+info.app.name=Spring Sample Application
+info.app.description=This is my first spring boot application
+info.app.version=1.0.0

spring-boot-modules/spring-boot-1/src/test/java/com/baeldung/actuator/CustomEndpointIntegrationTest.java

@@ -0,0 +1,46 @@
+package com.baeldung.actuator;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.autoconfigure.LocalManagementPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.client.RestTemplate;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import static org.hamcrest.CoreMatchers.hasItems;
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = "management.port=0")
+public class CustomEndpointIntegrationTest {
+
+    @LocalManagementPort
+    private int port;
+
+    private RestTemplate restTemplate = new RestTemplate();
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenActuatorCustomEndpointWorks() throws IOException {
+        ResponseEntity<String> entity = restTemplate.getForEntity("http://localhost:" + port + "/customEndpoint", String.class);
+
+        assertThat(entity.getStatusCode(), is(HttpStatus.OK));
+
+        List<String> response = objectMapper.readValue(entity.getBody(), new TypeReference<ArrayList<String>>() {
+        });
+
+        assertThat(response, hasItems("This is message 1", "This is message 2"));
+    }
+}

spring-boot-modules/spring-boot-1/src/test/java/com/baeldung/actuator/HealthCheckIntegrationTest.java

@@ -0,0 +1,49 @@
+package com.baeldung.actuator;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.autoconfigure.LocalManagementPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.client.RestTemplate;
+
+import java.io.IOException;
+import java.util.LinkedHashMap;
+import java.util.Map;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.collection.IsMapContaining.hasEntry;
+import static org.hamcrest.collection.IsMapContaining.hasKey;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = "management.port=0")
+public class HealthCheckIntegrationTest {
+
+    @LocalManagementPort
+    private int port;
+
+    private RestTemplate restTemplate = new RestTemplate();
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenActuatorHealthEndpointWorks() throws IOException {
+        ResponseEntity<String> entity = restTemplate.getForEntity("http://localhost:" + port + "/health", String.class);
+
+        assertThat(entity.getStatusCode(), is(HttpStatus.OK));
+
+        Map<String, Object> response = objectMapper.readValue(entity.getBody(), new TypeReference<LinkedHashMap<String, Object>>() {
+        });
+
+        assertThat(response, hasEntry("status", "UP"));
+        assertThat(response, hasKey("myHealthCheck"));
+        assertThat(response, hasKey("diskSpace"));
+    }
+}

spring-boot-modules/spring-boot-1/src/test/java/com/baeldung/actuator/HealthCheckUnitTest.java

@@ -0,0 +1,35 @@
+package com.baeldung.actuator;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mockito;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.springframework.boot.actuate.health.Health;
+import org.springframework.boot.actuate.health.Status;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.Mockito.when;
+
+@RunWith(MockitoJUnitRunner.class)
+public class HealthCheckUnitTest {
+
+    @Test
+    public void whenCheckMethodReturnsZero_thenHealthMethodReturnsStatusUP() {
+        HealthCheck healthCheck = Mockito.spy(new HealthCheck());
+        when(healthCheck.check()).thenReturn(0);
+        Health health = healthCheck.health();
+
+        assertThat(health.getStatus(), is(Status.UP));
+    }
+
+    @Test
+    public void whenCheckMethodReturnsOtherThanZero_thenHealthMethodReturnsStatusDOWN() {
+        HealthCheck healthCheck = Mockito.spy(new HealthCheck());
+        when(healthCheck.check()).thenReturn(-1);
+        Health health = healthCheck.health();
+
+        assertThat(health.getStatus(), is(Status.DOWN));
+    }
+
+}

spring-boot-modules/spring-boot-1/src/test/java/com/baeldung/actuator/LoginServiceIntegrationTest.java

@@ -0,0 +1,61 @@
+package com.baeldung.actuator;
+
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.autoconfigure.LocalManagementPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.web.client.RestTemplate;
+
+import java.io.IOException;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.hasEntry;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = "management.port=0")
+public class LoginServiceIntegrationTest {
+
+    @LocalManagementPort
+    private int port;
+
+    @Autowired
+    private LoginServiceImpl loginService;
+
+    private RestTemplate restTemplate = new RestTemplate();
+
+    @Autowired
+    private ObjectMapper objectMapper;
+
+    @Test
+    public void whenLoginIsAdmin_thenSuccessCounterIsIncremented() throws IOException {
+        boolean success = loginService.login("admin", "secret".toCharArray());
+        ResponseEntity<String> entity = restTemplate.getForEntity("http://localhost:" + port + "/metrics", String.class);
+        Map<String, Object> response = objectMapper.readValue(entity.getBody(), new TypeReference<HashMap<String, Object>>() {
+        });
+
+        assertThat(success, is(true));
+        assertThat(entity.getStatusCode(), is(HttpStatus.OK));
+        assertThat(response, hasEntry("counter.login.success", 1));
+    }
+
+    @Test
+    public void whenLoginIsNotAdmin_thenFailureCounterIsIncremented() throws IOException {
+        boolean success = loginService.login("user", "notsecret".toCharArray());
+        ResponseEntity<String> entity = restTemplate.getForEntity("http://localhost:" + port + "/metrics", String.class);
+        Map<String, Object> response = objectMapper.readValue(entity.getBody(), new TypeReference<HashMap<String, Object>>() {
+        });
+
+        assertThat(success, is(false));
+        assertThat(entity.getStatusCode(), is(HttpStatus.OK));
+        assertThat(response, hasEntry("counter.login.failure", 1));
+    }
+}

spring-boot-modules/spring-boot-1/src/test/java/com/baeldung/actuator/LoginServiceUnitTest.java

@@ -0,0 +1,41 @@
+package com.baeldung.actuator;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.actuate.metrics.CounterService;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.mock.mockito.MockBean;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.hamcrest.CoreMatchers.is;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = LoginServiceImpl.class)
+public class LoginServiceUnitTest {
+
+    @MockBean
+    CounterService counterService;
+
+    @Autowired
+    LoginServiceImpl loginService;
+
+    @Test
+    public void whenLoginUserIsAdmin_thenSuccessCounterIsIncremented() {
+        boolean loginResult = loginService.login("admin", "secret".toCharArray());
+        assertThat(loginResult, is(true));
+        verify(counterService, times(1)).increment("counter.login.success");
+    }
+
+    @Test
+    public void whenLoginUserIsNotAdmin_thenFailureCounterIsIncremented() {
+        boolean loginResult = loginService.login("user", "notsecret".toCharArray());
+        assertThat(loginResult, is(false));
+        verify(counterService, times(1)).increment("counter.login.failure");
+    }
+
+}