Merge branch 'master' of https://github.com/Maiklins/tutorials into BAEL-20873-move-spring-boot-kotlin

Conflicts: spring-boot-modules/pom.xml
2020-02-01 16:42:36 +01:00
parent f38e666af4 20302f8baf
commit f9a386854f
228 changed files with 846 additions and 880 deletions
@@ -14,11 +14,19 @@
    </parent>

    <modules>
+        <module>spring-boot-admin</module>
        <module>spring-boot-artifacts</module>
+        <module>spring-boot-autoconfiguration</module>
+        <module>spring-boot-camel</module>
+        <module>spring-boot-custom-starter</module>
+        <module>spring-boot-crud</module>
        <module>spring-boot-data</module>
+        <!-- <module>spring-boot-gradle</module> --> <!-- Not a maven project -->
        <module>spring-boot-keycloak</module>
+        <module>spring-boot-logging-log4j2</module>
        <module>spring-boot-kotlin</module>
        <module>spring-boot-mvc-birt</module>
+        <module>spring-boot-nashorn</module>
        <module>spring-boot-properties</module>
        <module>spring-boot-springdoc</module>
        <module>spring-boot-testing</module>
@@ -0,0 +1,27 @@
+## Spring Boot Admin
+
+This module contains articles about Spring Boot Admin
+
+## 1. Spring Boot Admin Server
+
+* mvn clean install
+* mvn spring-boot:run
+* starts on port 8080
+* login with admin/admin
+* to activate mail notifications uncomment the starter mail dependency
+and the mail configuration from application.properties
+* add some real credentials if you want the app to send emails
+* to activate Hipchat notifications proceed same as for email
+
+## 2. Spring Boot App Client
+
+* mvn clean install
+* mvn spring-boot:run
+* starts on port 8081
+* basic auth client/client
+
+
+### Relevant Articles: 
+
+- [A Guide to Spring Boot Admin](https://www.baeldung.com/spring-boot-admin)
+- [Changing the Logging Level at the Runtime for a Spring Boot Application](https://www.baeldung.com/spring-boot-changing-log-level-at-runtime)
@@ -0,0 +1,26 @@
+<?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-admin</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-boot-admin</name>
+    <packaging>pom</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+
+    <modules>
+        <module>spring-boot-admin-server</module>
+        <module>spring-boot-admin-client</module>
+    </modules>
+
+    <properties>
+        <spring-boot.version>2.1.9.RELEASE</spring-boot.version>
+    </properties>
+
+</project>
@@ -0,0 +1,24 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
@@ -0,0 +1,65 @@
+<?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-admin-client</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-boot-admin-client</name>
+    <packaging>jar</packaging>
+    <description>Spring Boot Admin Client</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>spring-boot-admin</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <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>de.codecentric</groupId>
+            <artifactId>spring-boot-admin-starter-client</artifactId>
+            <version>${spring-boot-admin-starter-client.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>${spring-boot-maven-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <goals>
+                            <goal>build-info</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <spring-boot-admin-starter-client.version>2.1.6</spring-boot-admin-starter-client.version>
+        <spring-boot-maven-plugin.version>2.0.4.RELEASE</spring-boot-maven-plugin.version>
+    </properties>
+
+</project>
@@ -0,0 +1,12 @@
+package com.baeldung.springbootadminclient;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class SpringBootAdminClientApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(SpringBootAdminClientApplication.class, args);
+	}
+}
@@ -0,0 +1,20 @@
+#basic auth creddentials
+spring.security.user.name=client
+spring.security.user.password=client
+
+#configs to connect to a secured server
+spring.boot.admin.client.url=http://localhost:8080
+#spring.boot.admin.client.instance.service-base-url=http://localhost:8081
+spring.boot.admin.client.username=admin
+spring.boot.admin.client.password=admin
+
+#configs to give secured server info
+spring.boot.admin.client.instance.metadata.user.name=${spring.security.user.name}
+spring.boot.admin.client.instance.metadata.user.password=${spring.security.user.password}
+
+#app config
+spring.application.name=spring-boot-admin-client
+server.port=8081
+
+management.endpoints.web.exposure.include=*
+management.endpoint.health.show-details=always
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <jmxConfigurator />
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%date [%thread] %-5level %logger{25} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="CONSOLE"/>
+    </root>
+</configuration>
@@ -0,0 +1,55 @@
+package com.baeldung.springbootadminclient;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.core.env.Environment;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.junit.Assert.assertEquals;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.RANDOM_PORT;
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.httpBasic;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.unauthenticated;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = RANDOM_PORT)
+public class SpringBootAdminClientApplicationIntegrationTest {
+
+    @Autowired Environment environment;
+
+    @Autowired WebApplicationContext wac;
+
+    private MockMvc mockMvc;
+
+    @Before
+    public void setup() {
+        mockMvc = MockMvcBuilders
+          .webAppContextSetup(wac)
+          .build();
+    }
+
+    @Test
+    public void whenEnvironmentAvailable_ThenAdminServerPropertiesExist() {
+        assertEquals(environment.getProperty("spring.boot.admin.client.url"), "http://localhost:8080");
+        assertEquals(environment.getProperty("spring.boot.admin.client.username"), "admin");
+        assertEquals(environment.getProperty("spring.boot.admin.client.password"), "admin");
+    }
+
+    @Test
+    public void whenHttpBasicAttempted_ThenSuccess() throws Exception {
+        mockMvc.perform(get("/actuator/env").with(httpBasic("client", "client")));
+    }
+
+    @Test
+    public void whenInvalidHttpBasicAttempted_ThenUnauthorized() throws Exception {
+        mockMvc
+          .perform(get("/actuator/env").with(httpBasic("client", "invalid")))
+          .andExpect(unauthenticated());
+    }
+}
@@ -0,0 +1,17 @@
+package org.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.springbootadminclient.SpringBootAdminClientApplication;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = SpringBootAdminClientApplication.class)
+public class SpringContextTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}
@@ -0,0 +1,24 @@
+target/
+!.mvn/wrapper/maven-wrapper.jar
+
+### STS ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+
+### IntelliJ IDEA ###
+.idea
+*.iws
+*.iml
+*.ipr
+
+### NetBeans ###
+nbproject/private/
+build/
+nbbuild/
+dist/
+nbdist/
+.nb-gradle/
@@ -0,0 +1,88 @@
+<?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-admin-server</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-boot-admin-server</name>
+    <description>Spring Boot Admin Server</description>
+    <packaging>jar</packaging>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>spring-boot-admin</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+
+        <!-- dependencies used to enable admin server and UI -->
+        <!-- https://mvnrepository.com/artifact/de.codecentric/spring-boot-admin-starter-server -->
+        <dependency>
+            <groupId>de.codecentric</groupId>
+            <artifactId>spring-boot-admin-starter-server</artifactId>
+            <version>${spring-boot-admin-server.version}</version>
+        </dependency>
+
+        <!--Add login page and logout feature -->
+        <dependency>
+            <groupId>de.codecentric</groupId>
+            <artifactId>spring-boot-admin-server-ui-login</artifactId>
+            <version>${spring-boot-admin-server-ui-login.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.hazelcast</groupId>
+            <artifactId>hazelcast</artifactId>
+        </dependency>
+
+        <!--declare the admin server as a client, for self monitoring -->
+        <dependency>
+            <groupId>de.codecentric</groupId>
+            <artifactId>spring-boot-admin-starter-client</artifactId>
+            <version>${spring-boot-admin-starter-client.version}</version>
+        </dependency>
+        <!--mail notifications -->
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-mail</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.security</groupId>
+            <artifactId>spring-security-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <version>${spring-boot-maven-plugin.version}</version>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <spring-boot-admin-server.version>2.1.6</spring-boot-admin-server.version>
+        <spring-boot-admin-starter-client.version>2.1.6</spring-boot-admin-starter-client.version>
+        <spring-boot-admin-server-ui-login.version>1.5.7</spring-boot-admin-server-ui-login.version>
+        <spring-boot-maven-plugin.version>2.0.4.RELEASE</spring-boot-maven-plugin.version>
+    </properties>
+
+</project>
@@ -0,0 +1,14 @@
+package com.baeldung.springbootadminserver;
+
+import de.codecentric.boot.admin.server.config.EnableAdminServer;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@EnableAdminServer
+@SpringBootApplication
+public class SpringBootAdminServerApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(SpringBootAdminServerApplication.class, args);
+    }
+}
@@ -0,0 +1,47 @@
+package com.baeldung.springbootadminserver.configs;
+
+import com.hazelcast.config.Config;
+import com.hazelcast.config.EvictionPolicy;
+import com.hazelcast.config.InMemoryFormat;
+import com.hazelcast.config.MapConfig;
+import com.hazelcast.config.MergePolicyConfig;
+import com.hazelcast.config.TcpIpConfig;
+import com.hazelcast.map.merge.PutIfAbsentMapMergePolicy;
+
+import java.util.Collections;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class HazelcastConfig {
+
+    @Bean
+    public Config hazelcast() {
+        MapConfig eventStoreMap = new MapConfig("spring-boot-admin-event-store").setInMemoryFormat(InMemoryFormat.OBJECT)
+            .setBackupCount(1)
+            .setEvictionPolicy(EvictionPolicy.NONE)
+            .setMergePolicyConfig(new MergePolicyConfig(PutIfAbsentMapMergePolicy.class.getName(), 100));
+
+        MapConfig sentNotificationsMap = new MapConfig("spring-boot-admin-application-store").setInMemoryFormat(InMemoryFormat.OBJECT)
+            .setBackupCount(1)
+            .setEvictionPolicy(EvictionPolicy.LRU)
+            .setMergePolicyConfig(new MergePolicyConfig(PutIfAbsentMapMergePolicy.class.getName(), 100));
+
+        Config config = new Config();
+        config.addMapConfig(eventStoreMap);
+        config.addMapConfig(sentNotificationsMap);
+        config.setProperty("hazelcast.jmx", "true");
+
+        config.getNetworkConfig()
+            .getJoin()
+            .getMulticastConfig()
+            .setEnabled(false);
+        TcpIpConfig tcpIpConfig = config.getNetworkConfig()
+            .getJoin()
+            .getTcpIpConfig();
+        tcpIpConfig.setEnabled(true);
+        tcpIpConfig.setMembers(Collections.singletonList("127.0.0.1"));
+        return config;
+    }
+}
@@ -0,0 +1,48 @@
+package com.baeldung.springbootadminserver.configs;
+
+import java.time.Duration;
+import java.util.Collections;
+import java.util.List;
+
+import org.springframework.beans.factory.ObjectProvider;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.Primary;
+
+import de.codecentric.boot.admin.server.domain.entities.InstanceRepository;
+import de.codecentric.boot.admin.server.notify.CompositeNotifier;
+import de.codecentric.boot.admin.server.notify.LoggingNotifier;
+import de.codecentric.boot.admin.server.notify.Notifier;
+import de.codecentric.boot.admin.server.notify.RemindingNotifier;
+import de.codecentric.boot.admin.server.notify.filter.FilteringNotifier;
+
+@Configuration
+public class NotifierConfiguration {
+    private final InstanceRepository repository;
+    private final ObjectProvider<List<Notifier>> otherNotifiers;
+
+    public NotifierConfiguration(InstanceRepository repository, ObjectProvider<List<Notifier>> otherNotifiers) {
+        this.repository = repository;
+        this.otherNotifiers = otherNotifiers;
+    }
+
+    @Bean
+    public FilteringNotifier filteringNotifier() {
+        CompositeNotifier delegate = new CompositeNotifier(this.otherNotifiers.getIfAvailable(Collections::emptyList));
+        return new FilteringNotifier(delegate, this.repository);
+    }
+
+    @Bean
+    public LoggingNotifier notifier() {
+        return new LoggingNotifier(repository);
+    }
+
+    @Primary
+    @Bean(initMethod = "start", destroyMethod = "stop")
+    public RemindingNotifier remindingNotifier() {
+        RemindingNotifier remindingNotifier = new RemindingNotifier(filteringNotifier(), repository);
+        remindingNotifier.setReminderPeriod(Duration.ofMinutes(5));
+        remindingNotifier.setCheckReminderInverval(Duration.ofSeconds(60));
+        return remindingNotifier;
+    }
+}
@@ -0,0 +1,58 @@
+package com.baeldung.springbootadminserver.configs;
+
+import java.util.UUID;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.HttpMethod;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.web.authentication.SavedRequestAwareAuthenticationSuccessHandler;
+import org.springframework.security.web.csrf.CookieCsrfTokenRepository;
+import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
+
+import de.codecentric.boot.admin.server.config.AdminServerProperties;
+
+@Configuration
+@EnableWebSecurity
+public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
+    private final AdminServerProperties adminServer;
+
+    public WebSecurityConfig(AdminServerProperties adminServer) {
+        this.adminServer = adminServer;
+    }
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        SavedRequestAwareAuthenticationSuccessHandler successHandler = new SavedRequestAwareAuthenticationSuccessHandler();
+        successHandler.setTargetUrlParameter("redirectTo");
+        successHandler.setDefaultTargetUrl(this.adminServer.getContextPath() + "/");
+
+        http.authorizeRequests()
+            .antMatchers(this.adminServer.getContextPath() + "/assets/**")
+            .permitAll()
+            .antMatchers(this.adminServer.getContextPath() + "/login")
+            .permitAll()
+            .anyRequest()
+            .authenticated()
+            .and()
+            .formLogin()
+            .loginPage(this.adminServer.getContextPath() + "/login")
+            .successHandler(successHandler)
+            .and()
+            .logout()
+            .logoutUrl(this.adminServer.getContextPath() + "/logout")
+            .and()
+            .httpBasic()
+            .and()
+            .csrf()
+            .csrfTokenRepository(CookieCsrfTokenRepository.withHttpOnlyFalse())
+            .ignoringRequestMatchers(new AntPathRequestMatcher(this.adminServer.getContextPath() + "/instances", HttpMethod.POST.toString()), new AntPathRequestMatcher(this.adminServer.getContextPath() + "/instances/*", HttpMethod.DELETE.toString()),
+                new AntPathRequestMatcher(this.adminServer.getContextPath() + "/actuator/**"))
+            .and()
+            .rememberMe()
+            .key(UUID.randomUUID()
+                .toString())
+            .tokenValiditySeconds(1209600);
+    }
+}
@@ -0,0 +1,31 @@
+spring.application.name=spring-boot-admin-server
+
+spring.security.user.name=admin
+spring.security.user.password=admin
+
+#configs to connect to self register the admin server as a client
+spring.boot.admin.client.url=http://localhost:8080
+spring.boot.admin.client.username=${spring.security.user.name}
+spring.boot.admin.client.password=${spring.security.user.password}
+
+#configs to give secured server info
+spring.boot.admin.client.instance.metadata.user.name=${spring.security.user.name}
+spring.boot.admin.client.instance.metadata.user.password=${spring.security.user.password}
+
+management.endpoints.web.exposure.include=*
+management.endpoint.health.show-details=always
+
+#mail notifications
+spring.mail.host=
+spring.mail.username=
+spring.mail.password=
+spring.mail.port=
+spring.mail.properties.mail.smtp.auth=
+spring.mail.properties.mail.smtp.starttls.enable=
+
+spring.boot.admin.notify.mail.to=
+
+#hipchat notifications
+#spring.boot.admin.notify.hipchat.auth-token=<generated_token>
+#spring.boot.admin.notify.hipchat.room-id=<room-id>
+#spring.boot.admin.notify.hipchat.url=https://youcompany.hipchat.com/v2/
@@ -0,0 +1,13 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <jmxConfigurator />
+    <appender name="CONSOLE" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%date [%thread] %-5level %logger{25} - %msg%n</pattern>
+        </encoder>
+    </appender>
+
+    <root level="INFO">
+        <appender-ref ref="CONSOLE"/>
+    </root>
+</configuration>
@@ -0,0 +1,24 @@
+package com.baeldung.springbootadminserver;
+
+import com.baeldung.springbootadminserver.configs.HazelcastConfig;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import static org.junit.Assert.assertNotEquals;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = { HazelcastConfig.class }, webEnvironment = NONE)
+public class HazelcastConfigIntegrationTest {
+
+    @Autowired private ApplicationContext applicationContext;
+
+    @Test
+    public void whenApplicationContextStarts_HazelcastConfigBeanExists() {
+        assertNotEquals(applicationContext.getBean("hazelcast"), null);
+    }
+}
@@ -0,0 +1,43 @@
+package com.baeldung.springbootadminserver;
+
+import static org.junit.Assert.assertNotEquals;
+import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.NONE;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.context.ApplicationContext;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.springbootadminserver.configs.NotifierConfiguration;
+
+import de.codecentric.boot.admin.server.notify.Notifier;
+import de.codecentric.boot.admin.server.notify.RemindingNotifier;
+import de.codecentric.boot.admin.server.notify.filter.FilteringNotifier;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = { NotifierConfiguration.class, SpringBootAdminServerApplication.class }, webEnvironment = NONE) 
+public class NotifierConfigurationIntegrationTest {
+
+    @Autowired private ApplicationContext applicationContext;
+
+    @Test
+    public void whenApplicationContextStart_ThenNotifierBeanExists() {
+        Notifier notifier = (Notifier) applicationContext.getBean("notifier");
+        assertNotEquals(notifier, null);
+    }
+
+    @Test
+    public void whenApplicationContextStart_ThenFilteringNotifierBeanExists() {
+        FilteringNotifier filteringNotifier = (FilteringNotifier) applicationContext.getBean("filteringNotifier");
+        assertNotEquals(filteringNotifier, null);
+    }
+
+    @Test
+    public void whenApplicationContextStart_ThenRemindingNotifierBeanExists() {
+        RemindingNotifier remindingNotifier = (RemindingNotifier) applicationContext.getBean("remindingNotifier");
+        assertNotEquals(remindingNotifier, null);
+    }
+
+}
@@ -0,0 +1,72 @@
+package com.baeldung.springbootadminserver;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+import org.springframework.test.web.servlet.MockMvc;
+import org.springframework.test.web.servlet.setup.MockMvcBuilders;
+import org.springframework.web.context.WebApplicationContext;
+
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestBuilders.formLogin;
+import static org.springframework.security.test.web.servlet.request.SecurityMockMvcRequestPostProcessors.httpBasic;
+import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.get;
+import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
+import static org.springframework.security.test.web.servlet.response.SecurityMockMvcResultMatchers.unauthenticated;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class WebSecurityConfigIntegrationTest {
+
+    @Autowired WebApplicationContext wac;
+
+    private MockMvc mockMvc;
+
+    @Before
+    public void setup() {
+        mockMvc = MockMvcBuilders
+          .webAppContextSetup(wac)
+          .build();
+    }
+
+    @Test
+    public void whenApplicationStarts_ThenGetLoginPageWithSuccess() throws Exception {
+        mockMvc
+          .perform(get("/login.html"))
+          .andExpect(status().is2xxSuccessful());
+    }
+
+    @Test
+    public void whenFormLoginAttempted_ThenSuccess() throws Exception {
+        mockMvc.perform(formLogin("/login")
+          .user("admin")
+          .password("admin"));
+    }
+
+    @Test
+    public void whenFormLoginWithSuccess_ThenApiEndpointsAreAccessible() throws Exception {
+        mockMvc.perform(formLogin("/login")
+          .user("admin")
+          .password("admin"));
+
+        mockMvc
+          .perform(get("/applications/"))
+          .andExpect(status().is2xxSuccessful());
+
+    }
+
+    @Test
+    public void whenHttpBasicAttempted_ThenSuccess() throws Exception {
+        mockMvc.perform(get("/actuator/env").with(httpBasic("admin", "admin")));
+    }
+
+    @Test
+    public void whenInvalidHttpBasicAttempted_ThenUnauthorized() throws Exception {
+        mockMvc
+          .perform(get("/actuator/env").with(httpBasic("admin", "invalid")))
+          .andExpect(unauthenticated());
+    }
+
+}
@@ -0,0 +1,17 @@
+package org.baeldung;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+import com.baeldung.springbootadminserver.SpringBootAdminServerApplication;
+
+@RunWith(SpringRunner.class)
+@SpringBootTest(classes = SpringBootAdminServerApplication.class)
+public class SpringContextTest {
+
+    @Test
+    public void whenSpringContextIsBootstrapped_thenNoExceptions() {
+    }
+}
@@ -0,0 +1,5 @@
+/target/
+.settings/
+.classpath
+.project
+
@@ -0,0 +1,12 @@
+## Spring Boot Auto Configuration
+
+This module contains articles about Spring Boot Auto Configuration
+
+### The Course
+The "REST With Spring" Classes: http://bit.ly/restwithspring
+
+### Relevant Articles:
+
+- [Create a Custom Auto-Configuration with Spring Boot](https://www.baeldung.com/spring-boot-custom-auto-configuration)
+- [Guide to ApplicationContextRunner in Spring Boot](https://www.baeldung.com/spring-boot-context-runner)
+- [A Guide to Spring Boot Configuration Metadata](https://www.baeldung.com/spring-boot-configuration-metadata)
@@ -0,0 +1,118 @@
+<?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-autoconfiguration</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <name>spring-boot-autoconfiguration</name>
+    <packaging>war</packaging>
+    <description>This is simple boot application demonstrating a custom auto-configuration</description>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-boot-2</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-2</relativePath>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-thymeleaf</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-data-jpa</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+            <scope>test</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>mysql</groupId>
+            <artifactId>mysql-connector-java</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-configuration-processor</artifactId>
+            <version>2.1.6.RELEASE</version>
+            <optional>true</optional>
+        </dependency>
+
+        <dependency>
+            <groupId>org.hsqldb</groupId>
+            <artifactId>hsqldb</artifactId>
+            <scope>runtime</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <finalName>spring-boot</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-war-plugin</artifactId>
+            </plugin>
+        </plugins>
+
+    </build>
+
+    <profiles>
+        <profile>
+            <id>autoconfiguration</id>
+            <build>
+                <plugins>
+                    <plugin>
+                        <groupId>org.apache.maven.plugins</groupId>
+                        <artifactId>maven-surefire-plugin</artifactId>
+                        <executions>
+                            <execution>
+                                <phase>integration-test</phase>
+                                <goals>
+                                    <goal>test</goal>
+                                </goals>
+                                <configuration>
+                                    <excludes>
+                                        <exclude>**/*LiveTest.java</exclude>
+                                        <exclude>**/*IntegrationTest.java</exclude>
+                                        <exclude>**/*IntTest.java</exclude>
+                                    </excludes>
+                                    <includes>
+                                        <include>**/AutoconfigurationTest.java</include>
+                                    </includes>
+                                </configuration>
+                            </execution>
+                        </executions>
+                        <configuration>
+                            <systemPropertyVariables>
+                                <test.mime>json</test.mime>
+                            </systemPropertyVariables>
+                        </configuration>
+                    </plugin>
+                </plugins>
+            </build>
+        </profile>
+    </profiles>
+
+    <properties>
+        <jquery.version>3.1.1</jquery.version>
+        <bootstrap.version>3.3.7-1</bootstrap.version>
+        <subethasmtp.version>3.1.7</subethasmtp.version>
+        <tomee-servlet-api.version>8.5.11</tomee-servlet-api.version>
+    </properties>
+
+</project>
@@ -0,0 +1,118 @@
+package com.baeldung.autoconfiguration;
+
+import java.util.Arrays;
+import java.util.Properties;
+
+import javax.persistence.EntityManagerFactory;
+import javax.sql.DataSource;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.AutoConfigureOrder;
+import org.springframework.boot.autoconfigure.condition.ConditionMessage;
+import org.springframework.boot.autoconfigure.condition.ConditionMessage.Style;
+import org.springframework.boot.autoconfigure.condition.ConditionOutcome;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
+import org.springframework.boot.autoconfigure.condition.ConditionalOnResource;
+import org.springframework.boot.autoconfigure.condition.SpringBootCondition;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.ConditionContext;
+import org.springframework.context.annotation.Conditional;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.context.annotation.PropertySource;
+import org.springframework.core.Ordered;
+import org.springframework.core.env.Environment;
+import org.springframework.core.type.AnnotatedTypeMetadata;
+import org.springframework.jdbc.datasource.DriverManagerDataSource;
+import org.springframework.orm.jpa.JpaTransactionManager;
+import org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean;
+import org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter;
+import org.springframework.util.ClassUtils;
+
+@Configuration
+@ConditionalOnClass(DataSource.class)
+@AutoConfigureOrder(Ordered.HIGHEST_PRECEDENCE)
+@PropertySource("classpath:mysql.properties")
+public class MySQLAutoconfiguration {
+
+    @Autowired
+    private Environment env;
+
+    @Bean
+    @ConditionalOnProperty(name = "usemysql", havingValue = "local")
+    @ConditionalOnMissingBean
+    public DataSource dataSource() {
+        final DriverManagerDataSource dataSource = new DriverManagerDataSource();
+
+        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
+        dataSource.setUrl("jdbc:mysql://localhost:3306/myDb?createDatabaseIfNotExist=true&&serverTimezone=UTC");
+        dataSource.setUsername("mysqluser");
+        dataSource.setPassword("mysqlpass");
+
+        return dataSource;
+    }
+
+    @Bean(name = "dataSource")
+    @ConditionalOnProperty(name = "usemysql", havingValue = "custom")
+    @ConditionalOnMissingBean
+    public DataSource dataSource2() {
+        final DriverManagerDataSource dataSource = new DriverManagerDataSource();
+
+        dataSource.setDriverClassName("com.mysql.cj.jdbc.Driver");
+        dataSource.setUrl(env.getProperty("mysql.url"));
+        dataSource.setUsername(env.getProperty("mysql.user") != null ? env.getProperty("mysql.user") : "");
+        dataSource.setPassword(env.getProperty("mysql.pass") != null ? env.getProperty("mysql.pass") : "");
+
+        return dataSource;
+    }
+
+    @Bean
+    @ConditionalOnBean(name = "dataSource")
+    @ConditionalOnMissingBean
+    public LocalContainerEntityManagerFactoryBean entityManagerFactory() {
+        final LocalContainerEntityManagerFactoryBean em = new LocalContainerEntityManagerFactoryBean();
+        em.setDataSource(dataSource());
+        em.setPackagesToScan("com.baeldung.autoconfiguration.example");
+        em.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
+        if (additionalProperties() != null) {
+            em.setJpaProperties(additionalProperties());
+        }
+        return em;
+    }
+
+    @Bean
+    @ConditionalOnMissingBean(type = "JpaTransactionManager")
+    JpaTransactionManager transactionManager(final EntityManagerFactory entityManagerFactory) {
+        final JpaTransactionManager transactionManager = new JpaTransactionManager();
+        transactionManager.setEntityManagerFactory(entityManagerFactory);
+        return transactionManager;
+    }
+
+    @ConditionalOnResource(resources = "classpath:mysql.properties")
+    @Conditional(HibernateCondition.class)
+    final Properties additionalProperties() {
+        final Properties hibernateProperties = new Properties();
+
+        hibernateProperties.setProperty("hibernate.hbm2ddl.auto", env.getProperty("mysql-hibernate.hbm2ddl.auto"));
+        hibernateProperties.setProperty("hibernate.dialect", env.getProperty("mysql-hibernate.dialect"));
+        hibernateProperties.setProperty("hibernate.show_sql", env.getProperty("mysql-hibernate.show_sql") != null ? env.getProperty("mysql-hibernate.show_sql") : "false");
+
+        return hibernateProperties;
+    }
+
+    static class HibernateCondition extends SpringBootCondition {
+
+        private static final String[] CLASS_NAMES = { "org.hibernate.ejb.HibernateEntityManager", "org.hibernate.jpa.HibernateEntityManager" };
+
+        @Override
+        public ConditionOutcome getMatchOutcome(ConditionContext context, AnnotatedTypeMetadata metadata) {
+            ConditionMessage.Builder message = ConditionMessage.forCondition("Hibernate");
+
+            return Arrays.stream(CLASS_NAMES).filter(className -> ClassUtils.isPresent(className, context.getClassLoader())).map(className -> ConditionOutcome.match(message.found("class").items(Style.NORMAL, className))).findAny()
+                    .orElseGet(() -> ConditionOutcome.noMatch(message.didNotFind("class", "classes").items(Style.NORMAL, Arrays.asList(CLASS_NAMES))));
+        }
+
+    }
+}
@@ -0,0 +1,15 @@
+package com.baeldung.autoconfiguration.annotationprocessor;
+
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.boot.builder.SpringApplicationBuilder;
+import org.springframework.context.annotation.ComponentScan;
+
+import com.baeldung.autoconfiguration.MySQLAutoconfiguration;
+
+@EnableAutoConfiguration(exclude = { MySQLAutoconfiguration.class})
+@ComponentScan(basePackageClasses = {DatabaseProperties.class})
+public class AnnotationProcessorApplication {
+    public static void main(String[] args) {
+        new SpringApplicationBuilder(AnnotationProcessorApplication.class).run();
+    }
+}
@@ -0,0 +1,73 @@
+package com.baeldung.autoconfiguration.annotationprocessor;
+
+import javax.validation.constraints.Max;
+import javax.validation.constraints.Min;
+
+import org.springframework.boot.context.properties.ConfigurationProperties;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+@ConfigurationProperties(prefix = "database")
+public class DatabaseProperties {
+
+    public static class Server {
+
+        /**
+         * The IP of the database server
+         */
+        private String ip;
+
+        /**
+         * The Port of the database server.
+         * The Default value is 443.
+         * The allowed values are in the range 400-4000.
+         */
+        @Min(400)
+        @Max(800)
+        private int port = 443;
+
+        public String getIp() {
+            return ip;
+        }
+
+        public void setIp(String ip) {
+            this.ip = ip;
+        }
+
+        public int getPort() {
+            return port;
+        }
+
+        public void setPort(int port) {
+            this.port = port;
+        }
+    }
+
+    private String username;
+    private String password;
+    private Server server;
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    public Server getServer() {
+        return server;
+    }
+
+    public void setServer(Server server) {
+        this.server = server;
+    }
+}
@@ -0,0 +1,12 @@
+package com.baeldung.autoconfiguration.example;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@SpringBootApplication
+public class AutoconfigurationApplication {
+    
+    public static void main(String[] args) {
+        SpringApplication.run(AutoconfigurationApplication.class, args);
+    }
+}
@@ -0,0 +1,27 @@
+package com.baeldung.autoconfiguration.example;
+
+import javax.persistence.Entity;
+import javax.persistence.Id;
+
+@Entity
+public class MyUser {
+    @Id
+    private String email;
+
+    public MyUser() {
+    }
+
+    public MyUser(String email) {
+        super();
+        this.email = email;
+    }
+
+    public String getEmail() {
+        return email;
+    }
+
+    public void setEmail(String email) {
+        this.email = email;
+    }
+
+}
--- a/Show More
+++ b/Show More