initial commit of Hexagonal Architecture

spring-boot-modules/pom.xml

@@ -49,6 +49,7 @@
         <module>spring-boot-springdoc</module>
         <module>spring-boot-testing</module>
         <module>spring-boot-vue</module>
+        <module>spring-boot-hexagonal</module> <!-- Need to find a better place for this -->
     </modules>
 
 </project>

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

@@ -0,0 +1,4 @@
+## HEXAGONAL Architecture
+
+This module contains articles about Hexagonal Architecture implemented via Spring Boot.
+

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

@@ -0,0 +1,76 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <modelVersion>4.0.0</modelVersion>
+    <artifactId>spring-boot-hexagonal</artifactId>
+    <name>spring-boot-hexagonal</name>
+
+    <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-web</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-test</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>1.18.12</version>
+        </dependency>
+
+    </dependencies>
+
+    <build>
+        <finalName>spring-boot-hexagonal</finalName>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+                <configuration>
+                    <classifier>exec</classifier>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-assembly-plugin</artifactId>
+                <configuration>
+                    <descriptorRefs>
+                        <descriptorRef>jar-with-dependencies</descriptorRef>
+                    </descriptorRefs>
+                </configuration>
+                <executions>
+                    <execution>
+                        <id>make-assembly</id>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>single</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+</project>

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/Application.java

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

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/adapter/DocumentRepositoryImpl.java

@@ -0,0 +1,24 @@
+package com.ajay.documentservice.adapter;
+
+import com.ajay.documentservice.domain.Document;
+import com.ajay.documentservice.port.DocumentRepo;
+import org.springframework.stereotype.Repository;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@Repository
+public class DocumentRepositoryImpl implements DocumentRepo {
+	
+	private Map<String, Document> documentMap = new HashMap<>();
+	
+	@Override
+	public void storeDocument(Document document) {
+		documentMap.put(document.getId(), document);
+	}
+	
+	@Override
+	public Document findDocumentById(String id) {
+		return documentMap.get(id);
+	}
+}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/adapter/DocumentRestAdapter.java

@@ -0,0 +1,24 @@
+package com.ajay.documentservice.adapter;
+
+import com.ajay.documentservice.domain.Document;
+import com.ajay.documentservice.port.DocumentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.web.bind.annotation.*;
+
+@RestController
+@RequestMapping("/doc")
+public class DocumentRestAdapter {
+	@Autowired
+	private DocumentService documentService;
+	
+	@PostMapping
+	public void createDocument(@RequestBody Document document) {
+		documentService.createDocument(document);
+	}
+	
+	@GetMapping("/{id}")
+	public Document findById(@PathVariable String id) {
+		return documentService.findById(id);
+	}
+	
+}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/domain/Document.java

@@ -0,0 +1,13 @@
+package com.ajay.documentservice.domain;
+
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+@Builder
+public class Document {
+	private String id;
+	private String data;
+}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/port/DocumentRepo.java

@@ -0,0 +1,11 @@
+package com.ajay.documentservice.port;
+
+
+import com.ajay.documentservice.domain.Document;
+
+public interface DocumentRepo {
+	void storeDocument(Document document);
+	
+	Document findDocumentById(String id);
+}
+

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/port/DocumentService.java

@@ -0,0 +1,11 @@
+package com.ajay.documentservice.port;
+
+import com.ajay.documentservice.domain.Document;
+
+public interface DocumentService {
+	
+	void createDocument(Document document);
+	
+	Document findById(String id);
+	
+}

spring-boot-modules/spring-boot-hexagonal/src/main/java/com/baeldung/port/impl/DocumentServiceImpl.java

@@ -0,0 +1,24 @@
+package com.ajay.documentservice.port.impl;
+
+import com.ajay.documentservice.domain.Document;
+import com.ajay.documentservice.port.DocumentRepo;
+import com.ajay.documentservice.port.DocumentService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class DocumentServiceImpl implements DocumentService {
+	
+	@Autowired
+	private DocumentRepo documentRepo;
+	
+	@Override
+	public void createDocument(Document document) {
+		documentRepo.storeDocument(document);
+	}
+	
+	@Override
+	public Document findById(String id) {
+		return documentRepo.findDocumentById(id);
+	}
+}

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

@@ -0,0 +1 @@
+

spring-boot-modules/spring-boot-hexagonal/src/test/java/com/baeldung/ApplicationTests.java

@@ -0,0 +1,16 @@
+package com.ajay.documentservice.documentservice;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.test.context.junit4.SpringRunner;
+
+@SpringBootTest
+@RunWith(SpringRunner.class)
+class ApplicationTests {
+	
+	@Test
+	public void contextLoads() {
+	}
+	
+}