Merge remote-tracking branch 'upstream/master'

core-java-modules/core-java-21/src/main/java/com/baeldung/unnamedclasses/HelloWorld.java

@@ -0,0 +1,3 @@
+void main() {
+    System.out.println("Hello, World!");
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/unnamedclasses/HelloWorldChild.java

@@ -0,0 +1,7 @@
+package com.baeldung.unnamedclasses;
+
+public class HelloWorldChild extends HelloWorldSuper {
+    void main() {
+        System.out.println("Hello, World!");
+    }
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/unnamedclasses/HelloWorldSuper.java

@@ -0,0 +1,7 @@
+package com.baeldung.unnamedclasses;
+
+public class HelloWorldSuper {
+    public static void main(String[] args) {
+        System.out.println("Hello from the superclass");
+    }
+}

core-java-modules/core-java-21/src/main/java/com/baeldung/unnamedclasses/HelloWorldWithMethod.java

@@ -0,0 +1,6 @@
+private String getMessage() {
+    return "Hello, World!";
+}
+void main() {
+    System.out.println(getMessage());
+}

core-java-modules/core-java-collections-array-list-2/README.md

@@ -0,0 +1,6 @@
+## Core Java Collections ArrayList
+
+This module contains articles about the Java ArrayList collection
+
+### Relevant Articles:
+- [Create an ArrayList with Multiple Object Types](https://www.baeldung.com/arraylist-with-multiple-object-types)

core-java-modules/core-java-collections-array-list-2/pom.xml

@@ -0,0 +1,32 @@
+<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>
+    <artifactId>core-java-collections-array-list-2</artifactId>
+    <name>core-java-collections-array-list-2</name>
+    <packaging>jar</packaging>
+    <parent>
+        <groupId>com.baeldung.core-java-modules</groupId>
+        <artifactId>core-java-modules</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+    </parent>
+    
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <configuration>
+                    <source>${maven-compiler-plugin.source}</source>
+                    <target>${maven-compiler-plugin.target}</target>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+    
+    <properties>
+        <maven-compiler-plugin.source>17</maven-compiler-plugin.source>
+        <maven-compiler-plugin.target>17</maven-compiler-plugin.target>
+    </properties>
+</project>

core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multipleobjecttypes/AlternativeMultipeTypeList.java

@@ -0,0 +1,51 @@
+package com.baeldung.list.multipleobjecttypes;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.TreeMap;
+import java.util.function.Predicate;
+
+public class AlternativeMultipeTypeList {
+
+    public static void main(String[] args) {
+        // List of Parent Class
+        ArrayList<Number> myList = new ArrayList<>();
+        myList.add(1.2);
+        myList.add(2);
+        myList.add(-3.5);
+
+        // List of Interface type
+        ArrayList<Map> diffMapList = new ArrayList<>();
+        diffMapList.add(new HashMap<>());
+        diffMapList.add(new TreeMap<>());
+        diffMapList.add(new LinkedHashMap<>());
+
+        // List of Custom Object
+        ArrayList<CustomObject> objList = new ArrayList<>();
+        objList.add(new CustomObject("String"));
+        objList.add(new CustomObject(2));
+
+        // List via Functional Interface
+        List<Object> dataList = new ArrayList<>();
+
+        Predicate<Object> myPredicate = inputData -> (inputData instanceof String || inputData instanceof Integer);
+
+        UserFunctionalInterface myInterface = (listObj, data) -> {
+            if (myPredicate.test(data))
+                listObj.add(data);
+            else
+                System.out.println("Skipping input as data not allowed for class: " + data.getClass()
+                    .getSimpleName());
+            return listObj;
+        };
+
+        myInterface.addToList(dataList, Integer.valueOf(2));
+        myInterface.addToList(dataList, Double.valueOf(3.33));
+        myInterface.addToList(dataList, "String Value");
+        myInterface.printList(dataList);
+    }
+
+}

core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multipleobjecttypes/CustomObject.java

@@ -0,0 +1,22 @@
+package com.baeldung.list.multipleobjecttypes;
+
+public class CustomObject {
+    String classData;
+    Integer intData;
+
+    CustomObject(String classData) {
+        this.classData = classData;
+    }
+
+    CustomObject(Integer intData) {
+        this.intData = intData;
+    }
+
+    public String getClassData() {
+        return this.classData;
+    }
+
+    public Integer getIntData() {
+        return this.intData;
+    }
+}

core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multipleobjecttypes/MultipleObjectTypeArrayList.java

@@ -0,0 +1,40 @@
+package com.baeldung.list.multipleobjecttypes;
+
+import java.math.BigInteger;
+import java.time.LocalDate;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class MultipleObjectTypeArrayList {
+
+    public static void main(String[] args) {
+
+        ArrayList<Object> multiTypeList = new ArrayList<>();
+
+        multiTypeList.add(Integer.valueOf(10));
+        multiTypeList.add(Double.valueOf(11.5));
+        multiTypeList.add("String Data");
+        multiTypeList.add(Arrays.asList(1, 2, 3));
+        multiTypeList.add(new CustomObject("Class Data"));
+        multiTypeList.add(BigInteger.valueOf(123456789));
+        multiTypeList.add(LocalDate.of(2023, 9, 19));
+
+        for (Object dataObj : multiTypeList) {
+            if (dataObj instanceof Integer intData)
+                System.out.println("Integer Data : " + intData);
+            else if (dataObj instanceof Double doubleData)
+                System.out.println("Double Data : " + doubleData);
+            else if (dataObj instanceof String stringData)
+                System.out.println("String Data : " + stringData);
+            else if (dataObj instanceof List<?> intList)
+                System.out.println("List Data : " + intList);
+            else if (dataObj instanceof CustomObject customObj)
+                System.out.println("CustomObject Data : " + customObj.getClassData());
+            else if (dataObj instanceof BigInteger bigIntData)
+                System.out.println("BigInteger Data : " + bigIntData);
+            else if (dataObj instanceof LocalDate localDate)
+                System.out.println("LocalDate Data : " + localDate.toString());
+        }
+    }
+}

core-java-modules/core-java-collections-array-list-2/src/main/java/com/baeldung/list/multipleobjecttypes/UserFunctionalInterface.java

@@ -0,0 +1,18 @@
+package com.baeldung.list.multipleobjecttypes;
+
+import java.util.List;
+
+@FunctionalInterface
+public interface UserFunctionalInterface {
+
+    List<Object> addToList(List<Object> list, Object data);
+
+    default void printList(List<Object> dataList) {
+        for (Object data : dataList) {
+            if (data instanceof String stringData)
+                System.out.println("String Data: " + stringData);
+            if (data instanceof Integer intData)
+                System.out.println("Integer Data: " + intData);
+        }
+    }
+}

core-java-modules/pom.xml

@@ -28,13 +28,14 @@
         <!--<module>core-java-streams-2</module> -->
         <!--<module>core-java-sun</module> -->
         <module>core-java-9-improvements</module>
-        <module>core-java-collections-array-list</module>
         <module>core-java-9-streams</module>
         <module>core-java-9</module>
         <module>core-java-10</module>
         <module>core-java-11</module>
         <module>core-java-11-2</module>
         <module>core-java-11-3</module>
+        <module>core-java-collections-array-list</module>
+        <module>core-java-collections-array-list-2</module>
         <module>core-java-collections-list-4</module>
         <module>core-java-collections-list-5</module>
         <module>core-java-collections-maps-4</module>

jenkins-modules/plugins/pom.xml

@@ -12,6 +12,7 @@
         <groupId>org.jenkins-ci.plugins</groupId>
         <artifactId>plugin</artifactId>
         <version>2.33</version>
+        <relativePath/>
     </parent>
 
     <dependencies>

persistence-modules/spring-data-cassandra-2/src/test/java/org/baeldung/cassandra/inquery/ProductRepositoryNestedLiveTest.java

@@ -23,7 +23,7 @@ import static org.junit.jupiter.api.Assertions.*;
 
 @Testcontainers
 @SpringBootTest
-class ProductRepositoryIntegrationTest {
+class ProductRepositoryNestedLiveTest {
 
     private static final String KEYSPACE_NAME = "mynamespace";
 

persistence-modules/spring-data-cassandra-2/src/test/java/org/baeldung/objectmapper/MapperLiveTest.java

@@ -1,7 +1,8 @@
 package org.baeldung.objectmapper;
 
-import com.datastax.oss.driver.api.core.CqlIdentifier;
+import java.net.InetSocketAddress;
-import com.datastax.oss.driver.api.core.CqlSession;
+import java.util.List;
+
 import org.baeldung.objectmapper.dao.CounterDao;
 import org.baeldung.objectmapper.dao.UserDao;
 import org.baeldung.objectmapper.entity.Counter;
@@ -14,7 +15,8 @@ import org.testcontainers.containers.CassandraContainer;
 import org.testcontainers.junit.jupiter.Container;
 import org.testcontainers.junit.jupiter.Testcontainers;
 
-import java.util.List;
+import com.datastax.oss.driver.api.core.CqlIdentifier;
+import com.datastax.oss.driver.api.core.CqlSession;
 
 @Testcontainers
 @SpringBootTest
@@ -23,35 +25,30 @@ public class MapperLiveTest {
     private static final String KEYSPACE_NAME = "baeldung";
 
     @Container
-    private static final CassandraContainer cassandra = (CassandraContainer) new CassandraContainer("cassandra:3.11.2")
+    private static final CassandraContainer cassandra = (CassandraContainer) new CassandraContainer("cassandra:3.11.2").withExposedPorts(9042);
-            .withExposedPorts(9042);
 
+    @BeforeAll
     static void setupCassandraConnectionProperties() {
         System.setProperty("spring.data.cassandra.keyspace-name", KEYSPACE_NAME);
-        System.setProperty("spring.data.cassandra.contact-points", cassandra.getContainerIpAddress());
+        System.setProperty("spring.data.cassandra.contact-points", cassandra.getHost());
         System.setProperty("spring.data.cassandra.port", String.valueOf(cassandra.getMappedPort(9042)));
+        setupCassandra(new InetSocketAddress(cassandra.getHost(), cassandra.getMappedPort(9042)), cassandra.getLocalDatacenter());
     }
 
     static UserDao userDao;
     static CounterDao counterDao;
 
-    @BeforeAll
+    static void setupCassandra(InetSocketAddress cassandraEndpoint, String localDataCenter) {
-    static void setup() {
+        CqlSession session = CqlSession.builder()
-        setupCassandraConnectionProperties();
+            .withLocalDatacenter(localDataCenter)
-        CqlSession session = CqlSession.builder().build();
+            .addContactPoint(cassandraEndpoint)
+            .build();
 
-        String createKeyspace = "CREATE KEYSPACE IF NOT EXISTS baeldung " +
+        String createKeyspace = "CREATE KEYSPACE IF NOT EXISTS baeldung " + "WITH replication = {'class':'SimpleStrategy', 'replication_factor':1};";
-                "WITH replication = {'class':'SimpleStrategy', 'replication_factor':1};";
         String useKeyspace = "USE baeldung;";
-        String createUserTable = "CREATE TABLE IF NOT EXISTS user_profile " +
+        String createUserTable = "CREATE TABLE IF NOT EXISTS user_profile " + "(id int, username text, user_age int, writetime bigint, PRIMARY KEY (id, user_age)) " + "WITH CLUSTERING ORDER BY (user_age DESC);";
-                "(id int, username text, user_age int, writetime bigint, PRIMARY KEY (id, user_age)) " +
+        String createAdminTable = "CREATE TABLE IF NOT EXISTS admin_profile " + "(id int, username text, user_age int, role text, writetime bigint, department text, " + "PRIMARY KEY (id, user_age)) " + "WITH CLUSTERING ORDER BY (user_age DESC);";
-                "WITH CLUSTERING ORDER BY (user_age DESC);";
+        String createCounter = "CREATE TABLE IF NOT EXISTS counter " + "(id text, count counter, PRIMARY KEY (id));";
-        String createAdminTable = "CREATE TABLE IF NOT EXISTS admin_profile " +
-                "(id int, username text, user_age int, role text, writetime bigint, department text, " +
-                "PRIMARY KEY (id, user_age)) " +
-                "WITH CLUSTERING ORDER BY (user_age DESC);";
-        String createCounter = "CREATE TABLE IF NOT EXISTS counter " +
-                "(id text, count counter, PRIMARY KEY (id));";
 
         session.execute(createKeyspace);
         session.execute(useKeyspace);
@@ -87,10 +84,13 @@ public class MapperLiveTest {
 
     @Test
     void givenUser_whenGetUsersOlderThan_thenRetrieved() {
-        User user = new User(2, "JaneDoe", 20);
+        User user = new User(2, "JaneDoe", 32);
+        User userTwo = new User(3, "JohnDoe", 20);
         userDao.insertUser(user);
-        List<User> retrievedUsers = userDao.getUsersOlderThanAge(30).all();
+        userDao.insertUser(userTwo);
-        Assertions.assertEquals(retrievedUsers.size(), 1);
+        List<User> retrievedUsers = userDao.getUsersOlderThanAge(30)
+            .all();
+        Assertions.assertEquals(1, retrievedUsers.size());
     }
 
 }

spring-boot-modules/pom.xml

@@ -104,6 +104,7 @@
         <module>spring-boot-springdoc-2</module>
         <module>spring-boot-documentation</module>
         <module>spring-boot-3-url-matching</module>
+        <module>spring-boot-graalvm-docker</module>
     </modules>
 
     <dependencyManagement>

spring-boot-modules/spring-boot-3/pom.xml

@@ -41,6 +41,27 @@
             <artifactId>mockserver-netty</artifactId>
             <version>${mockserver.version}</version>
         </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>${jupiter.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>${jupiter.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>${jupiter.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-params</artifactId>
+            <version>${jupiter.version}</version>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>org.mock-server</groupId>
             <artifactId>mockserver-client-java</artifactId>
@@ -187,8 +208,46 @@
         <maven-surefire-plugin.version>3.0.0-M7</maven-surefire-plugin.version>
         <start-class>com.baeldung.sample.TodoApplication</start-class>
         <mockserver.version>5.14.0</mockserver.version>
-        <spring-boot.version>3.1.0</spring-boot.version>
+        <spring-boot.version>3.2.0-SNAPSHOT</spring-boot.version>
         <lombok-mapstruct-binding.version>0.2.0</lombok-mapstruct-binding.version>
+        <jupiter.version>5.10.0</jupiter.version>
     </properties>
 
+    <repositories>
+        <repository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </repository>
+        <repository>
+            <id>spring-snapshots</id>
+            <name>Spring Snapshots</name>
+            <url>https://repo.spring.io/snapshot</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+        </repository>
+    </repositories>
+    <pluginRepositories>
+        <pluginRepository>
+            <id>spring-milestones</id>
+            <name>Spring Milestones</name>
+            <url>https://repo.spring.io/milestone</url>
+            <snapshots>
+                <enabled>false</enabled>
+            </snapshots>
+        </pluginRepository>
+        <pluginRepository>
+            <id>spring-snapshots</id>
+            <name>Spring Snapshots</name>
+            <url>https://repo.spring.io/snapshot</url>
+            <releases>
+                <enabled>false</enabled>
+            </releases>
+        </pluginRepository>
+    </pluginRepositories>
+
 </project>

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/restclient/Article.java

@@ -0,0 +1,34 @@
+package com.baeldung.restclient;
+
+import java.util.Objects;
+
+public class Article {
+    Integer id;
+    String title;
+
+    public Article(Integer id, String title) {
+        this.id = id;
+        this.title = title;
+    }
+
+    public Integer getId() {
+        return id;
+    }
+
+    public String getTitle() {
+        return title;
+    }
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+        Article article = (Article) o;
+        return Objects.equals(id, article.id) && Objects.equals(title, article.title);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(id, title);
+    }
+}

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/restclient/ArticleController.java

@@ -0,0 +1,45 @@
+package com.baeldung.restclient;
+
+import org.springframework.web.bind.annotation.*;
+
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Objects;
+
+@RestController
+@RequestMapping("/articles")
+public class ArticleController {
+    Map<Integer, Article> database = new HashMap<>();
+
+    @GetMapping
+    public Collection<Article> getArticles() {
+        return database.values();
+    }
+
+    @GetMapping("/{id}")
+    public Article getArticle(@PathVariable Integer id) {
+        return database.get(id);
+    }
+
+    @PostMapping
+    public void createArticle(@RequestBody Article article) {
+        database.put(article.getId(), article);
+    }
+
+    @PutMapping("/{id}")
+    public void updateArticle(@PathVariable Integer id, @RequestBody Article article) {
+        assert Objects.equals(id, article.getId());
+        database.remove(id);
+        database.put(id, article);
+    }
+
+    @DeleteMapping("/{id}")
+    public void deleteArticle(@PathVariable Integer id) {
+        database.remove(id);
+    }
+    @DeleteMapping()
+    public void deleteArticles() {
+        database.clear();
+    }
+}

spring-boot-modules/spring-boot-3/src/main/java/com/baeldung/restclient/RestClientApplication.java

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

spring-boot-modules/spring-boot-3/src/test/java/com/baeldung/restclient/RestClientIntegrationTest.java

@@ -0,0 +1,114 @@
+package com.baeldung.restclient;
+
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.server.LocalServerPort;
+import org.springframework.core.ParameterizedTypeReference;
+import org.springframework.http.MediaType;
+import org.springframework.web.client.RestClient;
+
+import java.util.List;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
+public class RestClientIntegrationTest {
+
+	@LocalServerPort
+	private int port;
+	private String uriBase;
+	RestClient restClient = RestClient.create();
+
+	@BeforeAll
+	public void setup() {
+		uriBase = "http://localhost:" + port;
+	}
+
+	@AfterEach
+	public void teardown() {
+		restClient.delete()
+				.uri(uriBase + "/articles")
+				.retrieve()
+				.toBodilessEntity();
+	}
+
+	@Test
+	void shouldGetArticlesAndReturnString() {
+		String articlesAsString = restClient.get()
+				.uri(uriBase + "/articles")
+				.retrieve()
+				.body(String.class);
+
+		assertThat(articlesAsString).isEqualTo("[]");
+	}
+
+	@Test
+	void shouldPostAndGetArticles() {
+		Article article = new Article(1, "How to use RestClient");
+		restClient.post()
+				.uri(uriBase + "/articles")
+				.contentType(MediaType.APPLICATION_JSON)
+				.body(article)
+				.retrieve()
+				.toBodilessEntity();
+
+		List<Article> articles = restClient.get()
+				.uri(uriBase + "/articles")
+				.retrieve()
+				.body(new ParameterizedTypeReference<>() {});
+
+		assertThat(articles).isEqualTo(List.of(article));
+	}
+
+	@Test
+	void shouldPostAndPutAndGetArticles() {
+		Article article = new Article(1, "How to use RestClient");
+		restClient.post()
+				.uri(uriBase + "/articles")
+				.contentType(MediaType.APPLICATION_JSON)
+				.body(article)
+				.retrieve()
+				.toBodilessEntity();
+
+		Article articleChanged = new Article(1, "How to use RestClient even better");
+		restClient.put()
+				.uri(uriBase + "/articles/1")
+				.contentType(MediaType.APPLICATION_JSON)
+				.body(articleChanged)
+				.retrieve()
+				.toBodilessEntity();
+
+		List<Article> articles = restClient.get()
+				.uri(uriBase + "/articles")
+				.retrieve()
+				.body(new ParameterizedTypeReference<>() {});
+
+		assertThat(articles).isEqualTo(List.of(articleChanged));
+	}
+
+	@Test
+	void shouldPostAndDeleteArticles() {
+		Article article = new Article(1, "How to use RestClient");
+		restClient.post()
+				.uri(uriBase + "/articles")
+				.contentType(MediaType.APPLICATION_JSON)
+				.body(article)
+				.retrieve()
+				.toBodilessEntity();
+
+		restClient.delete()
+				.uri(uriBase + "/articles")
+				.retrieve()
+				.toBodilessEntity();
+
+		List<Article> articles = restClient.get()
+				.uri(uriBase + "/articles")
+				.retrieve()
+				.body(new ParameterizedTypeReference<>() {});
+
+		assertThat(articles).isEqualTo(List.of());
+	}
+}

spring-boot-modules/spring-boot-graalvm-docker/Dockerfile

@@ -0,0 +1,3 @@
+FROM ubuntu:jammy
+COPY target/springboot-graalvm-docker /springboot-graalvm-docker
+CMD ["/springboot-graalvm-docker"]

spring-boot-modules/spring-boot-graalvm-docker/pom.xml

@@ -0,0 +1,41 @@
+<?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>com.baeldung</groupId>
+       <artifactId>parent-boot-3</artifactId>
+        <version>0.0.1-SNAPSHOT</version>
+        <relativePath>../../parent-boot-3</relativePath>
+    </parent>
+
+    <groupId>com.baeldung</groupId>
+    <artifactId>spring-boot-graalvm-docker</artifactId>
+    <version>1.0.0</version>
+    <name>spring-boot-graalvm-docker</name>
+    <description>Spring Boot GrralVM with Docker</description>
+    <dependencies>
+         <dependency>
+              <groupId>org.springframework.boot</groupId>
+              <artifactId>spring-boot-starter-web</artifactId>
+         </dependency>
+         <dependency>
+              <groupId>org.springframework.boot</groupId>
+              <artifactId>spring-boot-starter-test</artifactId>
+              <scope>test</scope>
+         </dependency>
+    </dependencies>
+    <build>
+         <plugins>
+              <plugin>
+                   <groupId>org.graalvm.buildtools</groupId>
+                   <artifactId>native-maven-plugin</artifactId>
+              </plugin>
+              <plugin>
+                   <groupId>org.springframework.boot</groupId>
+                   <artifactId>spring-boot-maven-plugin</artifactId>
+              </plugin>
+         </plugins>
+    </build>
+</project>

spring-boot-modules/spring-boot-graalvm-docker/src/main/java/com/baeldung/graalvmdockerimage/GraalvmDockerImageApplication.java

@@ -0,0 +1,24 @@
+package com.baeldung.graalvmdockerimage;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@SpringBootApplication
+public class GraalvmDockerImageApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(GraalvmDockerImageApplication.class, args);
+    }
+
+}
+
+@RestController
+class HelloController {
+    
+    @GetMapping
+    public String hello() {
+        return "Hello GraalVM";
+    }
+}

spring-boot-modules/spring-boot-graalvm-docker/src/main/resources/application.properties

@@ -0,0 +1 @@
+

spring-boot-modules/spring-boot-keycloak-2/pom.xml

@@ -11,10 +11,9 @@
     <description>This is a simple application demonstrating integration between Keycloak and Spring Boot.</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-keycloak-adapters/pom.xml

@@ -11,10 +11,9 @@
     <description>This is a simple application demonstrating integration between Keycloak and Spring Boot.</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-keycloak/pom.xml

@@ -11,10 +11,9 @@
     <description>This is a simple application demonstrating integration between Keycloak and Spring Boot.</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-logging-log4j2/pom.xml

@@ -9,10 +9,9 @@
     <description>Demo project for Spring Boot Logging with Log4J2</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-mvc-birt/pom.xml

@@ -10,10 +10,9 @@
     <description>Module For Spring Boot Integration with BIRT</description>
 
     <parent>
-        <groupId>com.baeldung</groupId>
+        <groupId>com.baeldung.spring-boot-modules</groupId>
-        <artifactId>parent-boot-2</artifactId>
+        <artifactId>spring-boot-modules</artifactId>
-        <version>0.0.1-SNAPSHOT</version>
+        <version>1.0.0-SNAPSHOT</version>
-        <relativePath>../../parent-boot-2</relativePath>
     </parent>
 
     <dependencies>

spring-boot-modules/spring-boot-ssl-bundles/pom.xml

@@ -4,10 +4,10 @@
          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>
     <parent>
-        <groupId>org.springframework.boot</groupId>
+        <groupId>com.baeldung</groupId>
-        <artifactId>spring-boot-starter-parent</artifactId>
+        <artifactId>parent-boot-3</artifactId>
-        <version>3.1.3</version>
+        <version>0.0.1-SNAPSHOT</version>
-        <relativePath/>
+        <relativePath>../../parent-boot-3</relativePath>
     </parent>
     <artifactId>springbootsslbundles</artifactId>
     <name>spring-boot-ssl-bundles</name>

spring-boot-modules/spring-boot-ssl-bundles/src/test/java/com/baeldung/springbootsslbundles/SpringContextTest.java

@@ -4,7 +4,7 @@ import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;
 
 @SpringBootTest
-class SSLBundleApplicationTests {
+class SpringContextTest {
     @Test
     void contextLoads() {
 

spring-reactive-modules/spring-5-reactive/src/main/java/com/baeldung/reactive/controller/PathPatternController.java

@@ -22,9 +22,9 @@ public class PathPatternController {
         return "/spring5/*id";
     }
 
-    @GetMapping("//**")
+    @GetMapping("/resources/**")
     public String wildcardTakingZeroOrMorePathSegments() {
-        return "//**";
+        return "/resources/**";
     }
 
     @GetMapping("/{baeldung:[a-z]+}")

spring-reactive-modules/spring-5-reactive/src/main/java/com/baeldung/reactive/urlmatch/ExploreSpring5URLPatternUsingRouterFunctions.java

@@ -29,7 +29,7 @@ public class ExploreSpring5URLPatternUsingRouterFunctions {
             .andRoute(GET("/{var1}_{var2}"), serverRequest -> ok().body(fromValue(serverRequest.pathVariable("var1") + " , " + serverRequest.pathVariable("var2"))))
             .andRoute(GET("/{baeldung:[a-z]+}"), serverRequest -> ok().body(fromValue("/{baeldung:[a-z]+} was accessed and baeldung=" + serverRequest.pathVariable("baeldung"))))
             .and(RouterFunctions.resources("/files/{*filepaths}", new ClassPathResource("files/")))
-            .and(RouterFunctions.resources("//**", new ClassPathResource("/")));
+            .and(RouterFunctions.resources("/resources/**", new ClassPathResource("resources/")));
     }
 
     WebServer start() throws Exception {

spring-reactive-modules/spring-5-reactive/src/test/java/com/baeldung/reactive/urlmatch/ExploreSpring5URLPatternUsingRouterFunctionsIntegrationTest.java

@@ -108,9 +108,9 @@ public class ExploreSpring5URLPatternUsingRouterFunctionsIntegrationTest {
     }
 
     @Test
-    public void givenRouter_whenAccess_thenGot() throws Exception {
+    public void givenRouter_whenAccess_thenGot() {
         client.get()
-            .uri("//test/test.txt")
+            .uri("/resources/test/test.txt")
             .exchange()
             .expectStatus()
             .isOk()

spring-reactive-modules/spring-5-reactive/src/test/java/com/baeldung/reactive/urlmatch/PathPatternsUsingHandlerMethodIntegrationTest.java

@@ -72,12 +72,12 @@ public class PathPatternsUsingHandlerMethodIntegrationTest {
     public void givenHandlerMethod_whenURLWithWildcardTakingZeroOrMorePathSegments_then200() {
 
         client.get()
-            .uri("//baeldung")
+            .uri("/resources/baeldung")
             .exchange()
             .expectStatus()
             .is2xxSuccessful()
             .expectBody()
-            .equals("//**");
+            .equals("/resources/**");
     }
 
     @Test

spring-reactive-modules/spring-reactive-exceptions/README.md

@@ -1,4 +1,3 @@
 ## Relevant Articles
 - [How to Resolve Spring Webflux DataBufferLimitException](https://www.baeldung.com/spring-webflux-databufferlimitexception)
 - [Custom WebFlux Exceptions in Spring Boot 3](https://www.baeldung.com/spring-boot-custom-webflux-exceptions)
-- [Handling Errors in Spring WebFlux](https://www.baeldung.com/spring-webflux-errors)

spring-reactive-modules/spring-reactive/README.md

@@ -1,5 +1,5 @@
 
-This module contains articles about Spring Reactive that are also part of an Ebook.
+This module contains articles about Spring Reactive that **are also part of an Ebook.**
 
 ## Spring Reactive
 
@@ -14,9 +14,10 @@ This module contains articles describing reactive processing in Spring.
 - [Spring 5 WebClient](https://www.baeldung.com/spring-5-webclient)
 - [Spring WebClient vs. RestTemplate](https://www.baeldung.com/spring-webclient-resttemplate)
 - [Spring WebClient Requests with Parameters](https://www.baeldung.com/webflux-webclient-parameters)
+- [Handling Errors in Spring WebFlux](https://www.baeldung.com/spring-webflux-errors)
 - [Spring Security 5 for Reactive Applications](https://www.baeldung.com/spring-security-5-reactive)
 - [Concurrency in Spring WebFlux](https://www.baeldung.com/spring-webflux-concurrency)
 
 ### NOTE:
 
-Since this is a module tied to an e-book, it should **not** be moved or used to store the code for any further article.
+## Since this is a module tied to an e-book, it should **not** be moved or used to store the code for any further article.

spring-reactive-modules/spring-reactive/pom.xml

@@ -9,7 +9,7 @@
         <groupId>com.baeldung</groupId>
         <artifactId>parent-boot-3</artifactId>
         <version>0.0.1-SNAPSHOT</version>
-        <relativePath>../../parent-boot-3/pom.xml</relativePath>
+        <relativePath>../../parent-boot-3</relativePath>
     </parent>
 
     <dependencies>

spring-reactive-modules/spring-reactive/src/main/java/com/baeldung/reactive/errorhandling/ErrorHandlingApplication.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.reactive.errorhandling;
+package com.baeldung.reactive.errorhandling;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

spring-reactive-modules/spring-reactive/src/main/java/com/baeldung/reactive/errorhandling/GlobalErrorAttributes.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.reactive.errorhandling;
+package com.baeldung.reactive.errorhandling;
 
 import java.util.Map;
 

spring-reactive-modules/spring-reactive/src/main/java/com/baeldung/reactive/errorhandling/GlobalErrorWebExceptionHandler.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.reactive.errorhandling;
+package com.baeldung.reactive.errorhandling;
 
 import java.util.Map;
 

spring-reactive-modules/spring-reactive/src/main/java/com/baeldung/reactive/errorhandling/Handler.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.reactive.errorhandling;
+package com.baeldung.reactive.errorhandling;
 
 import org.springframework.http.HttpStatus;
 import org.springframework.http.MediaType;

spring-reactive-modules/spring-reactive/src/main/java/com/baeldung/reactive/errorhandling/NameRequiredException.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.reactive.errorhandling;
+package com.baeldung.reactive.errorhandling;
 
 import org.springframework.http.HttpStatus;
 import org.springframework.web.server.ResponseStatusException;

spring-reactive-modules/spring-reactive/src/main/java/com/baeldung/reactive/errorhandling/Router.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.reactive.errorhandling;
+package com.baeldung.reactive.errorhandling;
 
 import static org.springframework.http.MediaType.TEXT_PLAIN;
 import static org.springframework.web.reactive.function.server.RequestPredicates.GET;

spring-reactive-modules/spring-reactive/src/test/java/com/baeldung/reactive/errorhandling/ErrorHandlingIntegrationTest.java

@@ -1,4 +1,4 @@
-package com.baeldung.spring.reactive.errorhandling;
+package com.baeldung.reactive.errorhandling;
 
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;

testing-modules/junit-5-advanced/src/main/java/com/baeldung/interfaces/unittest/Circle.java

@@ -0,0 +1,19 @@
+package com.baeldung.interfaces.unittest;
+
+public class Circle implements Shape {
+
+    private double radius;
+
+    Circle(double radius) {
+        this.radius = radius;
+    }
+
+    @Override
+    public double area() {
+        return 3.14 * radius * radius;
+    }
+
+    public double circumference() {
+        return 2 * 3.14 * radius;
+    }
+}

testing-modules/junit-5-advanced/src/main/java/com/baeldung/interfaces/unittest/Rectangle.java

@@ -0,0 +1,21 @@
+package com.baeldung.interfaces.unittest;
+
+public class Rectangle implements Shape {
+
+    private double length;
+    private double breadth;
+
+    public Rectangle(double length, double breadth) {
+        this.length = length;
+        this.breadth = breadth;
+    }
+
+    @Override
+    public double area() {
+        return length * breadth;
+    }
+
+    public double perimeter() {
+        return 2 * (length + breadth);
+    }
+}

testing-modules/junit-5-advanced/src/main/java/com/baeldung/interfaces/unittest/Shape.java

@@ -0,0 +1,6 @@
+package com.baeldung.interfaces.unittest;
+
+public interface Shape {
+
+    double area();
+}

testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/CircleExtendsBaseUnitTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.interfaces.unittest;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+class CircleExtendsBaseUnitTest extends ShapeUnitTest {
+
+    @Override
+    public Map<String, Object> instantiateShapeWithExpectedArea() {
+        Map<String, Object> shapeAreaMap = new HashMap<>();
+        shapeAreaMap.put("shape", new Circle(5));
+        shapeAreaMap.put("area", 78.5);
+        return shapeAreaMap;
+    }
+
+    @Test
+    void whenCircumferenceIsCalculated_thenSuccessful() {
+        Circle circle = new Circle(2);
+        double circumference = circle.circumference();
+        assertEquals(12.56, circumference);
+    }
+}

testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/CircleUnitTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.interfaces.unittest;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+class CircleUnitTest {
+
+    @Test
+    void whenAreaIsCalculated_thenSuccessful() {
+        Shape circle = new Circle(5);
+        double area = circle.area();
+        assertEquals(78.5, area);
+    }
+
+    @Test
+    void whenCircumferenceIsCalculated_thenSuccessful() {
+        Circle circle = new Circle(2);
+        double circumference = circle.circumference();
+        assertEquals(12.56, circumference);
+    }
+}

testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/ParameterizedUnitTest.java

@@ -0,0 +1,27 @@
+package com.baeldung.interfaces.unittest;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.MethodSource;
+
+public class ParameterizedUnitTest {
+
+    @ParameterizedTest
+    @MethodSource("data")
+    void givenShapeInstance_whenAreaIsCalculated_thenSuccessful(Shape shapeInstance, double expectedArea) {
+        double area = shapeInstance.area();
+        assertEquals(expectedArea, area);
+
+    }
+
+    private static Collection<Object[]> data() {
+        return Arrays.asList(new Object[][] {
+          { new Circle(5), 78.5 },
+          { new Rectangle(4, 5), 20 }
+        });
+    }
+}

testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/RectangleExtendsBaseUnitTest.java

@@ -0,0 +1,26 @@
+package com.baeldung.interfaces.unittest;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+class RectangleExtendsBaseUnitTest extends ShapeUnitTest {
+
+    @Override
+    public Map<String, Object> instantiateShapeWithExpectedArea() {
+        Map<String, Object> shapeAreaMap = new HashMap<>();
+        shapeAreaMap.put("shape", new Rectangle(5, 4));
+        shapeAreaMap.put("area", 20.0);
+        return shapeAreaMap;
+    }
+
+    @Test
+    void whenPerimeterIsCalculated_thenSuccessful() {
+        Rectangle rectangle = new Rectangle(5, 4);
+        double perimeter = rectangle.perimeter();
+        assertEquals(18, perimeter);
+    }
+}

testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/RectangleUnitTest.java

@@ -0,0 +1,22 @@
+package com.baeldung.interfaces.unittest;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import org.junit.jupiter.api.Test;
+
+class RectangleUnitTest {
+
+    @Test
+    void whenAreaIsCalculated_thenSuccessful() {
+        Shape rectangle = new Rectangle(5, 4);
+        double area = rectangle.area();
+        assertEquals(20, area);
+    }
+
+    @Test
+    void whenPerimeterIsCalculated_thenSuccessful() {
+        Rectangle rectangle = new Rectangle(5, 4);
+        double perimeter = rectangle.perimeter();
+        assertEquals(18, perimeter);
+    }
+}

testing-modules/junit-5-advanced/src/test/java/com/baeldung/interfaces/unittest/ShapeUnitTest.java

@@ -0,0 +1,21 @@
+package com.baeldung.interfaces.unittest;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+
+import java.util.Map;
+
+import org.junit.jupiter.api.Test;
+
+public abstract class ShapeUnitTest {
+
+    public abstract Map<String, Object> instantiateShapeWithExpectedArea();
+
+    @Test
+    void givenShapeInstance_whenAreaIsCalculated_thenSuccessful() {
+        Map<String, Object> shapeAreaMap = instantiateShapeWithExpectedArea();
+        Shape shape = (Shape) shapeAreaMap.get("shape");
+        double expectedArea = (double) shapeAreaMap.get("area");
+        double area = shape.area();
+        assertEquals(expectedArea, area);
+    }
+}