BAEL-3091: The Prototype Pattern in Java (changed code based on valid comments from a reader)

vertx/README.md

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+## Vert.x
+
+This module contains articles about Vert.x
+
+### Relevant articles
+
+- [Introduction to Vert.x](https://www.baeldung.com/vertx)

vertx/pom.xml

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+<?xml version="1.0"?>
+<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
+    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
+    <modelVersion>4.0.0</modelVersion>
+    <groupId>com.baeldung</groupId>
+    <artifactId>vertx</artifactId>
+    <version>1.0-SNAPSHOT</version>
+    <name>vertx</name>
+    <url>http://maven.apache.org</url>
+
+    <parent>
+        <groupId>com.baeldung</groupId>
+        <artifactId>parent-modules</artifactId>
+        <version>1.0.0-SNAPSHOT</version>
+    </parent>
+
+    <dependencies>
+        <dependency>
+            <groupId>io.vertx</groupId>
+            <artifactId>vertx-core</artifactId>
+            <version>${vertx.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.vertx</groupId>
+            <artifactId>vertx-web</artifactId>
+            <version>${vertx.version}</version>
+        </dependency>
+        <dependency>
+            <groupId>io.vertx</groupId>
+            <artifactId>vertx-unit</artifactId>
+            <version>${vertx.version}</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>${maven-shade-plugin.version}</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <manifestEntries>
+                                        <Main-Class>io.vertx.core.Starter</Main-Class>
+                                        <Main-Verticle>com.baeldung.SimpleServerVerticle</Main-Verticle>
+                                    </manifestEntries>
+                                </transformer>
+                            </transformers>
+                            <artifactSet />
+                            <outputFile>${project.build.directory}/${project.artifactId}-${project.version}-app.jar</outputFile>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <properties>
+        <vertx.version>3.8.1</vertx.version>
+        <maven-shade-plugin.version>3.2.1</maven-shade-plugin.version>
+    </properties>
+
+</project>

vertx/src/main/java/com/baeldung/HelloVerticle.java

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+package com.baeldung;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import io.vertx.core.AbstractVerticle;
+import io.vertx.core.Future;
+import io.vertx.core.Vertx;
+
+public class HelloVerticle extends AbstractVerticle {
+    private static final Logger LOGGER = LoggerFactory.getLogger(HelloVerticle.class);
+
+    public static void main(String[] args) {
+        Vertx vertx = Vertx.vertx();
+        vertx.deployVerticle(new HelloVerticle());
+    }
+
+    @Override
+    public void start(Future<Void> future) {
+        LOGGER.info("Welcome to Vertx");
+    }
+
+    @Override
+    public void stop() {
+        LOGGER.info("Shutting down application");
+    }
+}
+

vertx/src/main/java/com/baeldung/SimpleServerVerticle.java

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+package com.baeldung;
+
+import io.vertx.core.AbstractVerticle;
+import io.vertx.core.Future;
+
+public class SimpleServerVerticle extends AbstractVerticle {
+
+    @Override
+    public void start(Future<Void> future) {
+        vertx.createHttpServer()
+                .requestHandler(
+                  r -> r.response().end("Welcome to Vert.x Intro"))
+                .listen(config().getInteger("http.port", 8080), result -> {
+                    if (result.succeeded()) {
+                        future.complete();
+                    } else {
+                        future.fail(result.cause());
+                    }
+                });
+    }
+
+}
+
+

vertx/src/main/java/com/baeldung/model/Article.java

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+package com.baeldung.model;
+
+public class Article {
+    private String id;
+    private String content;
+    private String author;
+    private String datePublished;
+    private int wordCount;
+
+    public Article(String id, String content, String author, String datePublished, int wordCount) {
+        super();
+        this.id = id;
+        this.content = content;
+        this.author = author;
+        this.datePublished = datePublished;
+        this.wordCount = wordCount;
+    }
+
+    public String getId() {
+        return id;
+    }
+
+    public void setId(String id) {
+        this.id = id;
+    }
+
+    public String getContent() {
+        return content;
+    }
+
+    public void setContent(String content) {
+        this.content = content;
+    }
+
+    public String getAuthor() {
+        return author;
+    }
+
+    public void setAuthor(String author) {
+        this.author = author;
+    }
+
+    public String getDatePublished() {
+        return datePublished;
+    }
+
+    public void setDatePublished(String datePublished) {
+        this.datePublished = datePublished;
+    }
+
+    public int getWordCount() {
+        return wordCount;
+    }
+
+    public void setWordCount(int wordCount) {
+        this.wordCount = wordCount;
+    }
+
+}

vertx/src/main/java/com/baeldung/rest/RestServiceVerticle.java

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+package com.baeldung.rest;
+
+import com.baeldung.model.Article;
+
+import io.vertx.core.AbstractVerticle;
+import io.vertx.core.Future;
+import io.vertx.core.json.Json;
+import io.vertx.ext.web.Router;
+import io.vertx.ext.web.RoutingContext;
+
+public class RestServiceVerticle extends AbstractVerticle {
+    @Override
+    public void start(Future<Void> future) {
+
+        Router router = Router.router(vertx);
+        router.get("/api/baeldung/articles/article/:id")
+                .handler(this::getArticles);
+
+        vertx.createHttpServer()
+                .requestHandler(router::accept)
+                .listen(config().getInteger("http.port", 8080), result -> {
+                    if (result.succeeded()) {
+                        future.complete();
+                    } else {
+                        future.fail(result.cause());
+                    }
+                });
+    }
+
+    private void getArticles(RoutingContext routingContext) {
+        String articleId = routingContext.request()
+                .getParam("id");
+        Article article = new Article(articleId, "This is an intro to vertx", "baeldung", "01-02-2017", 1578);
+
+        routingContext.response()
+                .putHeader("content-type", "application/json")
+                .setStatusCode(200)
+                .end(Json.encodePrettily(article));
+    }
+
+}

vertx/src/main/resources/conf/conf.json

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+{
+ "http.port":8080	
+}

vertx/src/main/resources/logback.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<configuration>
+    <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
+        <encoder>
+            <pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
+            </pattern>
+        </encoder>
+    </appender>
+
+    <logger name="org.springframework" level="WARN" />
+    <logger name="org.springframework.transaction" level="WARN" />
+
+    <!-- in order to debug some marshalling issues, this needs to be TRACE -->
+    <logger name="org.springframework.web.servlet.mvc" level="WARN" />
+
+    <root level="INFO">
+        <appender-ref ref="STDOUT" />
+    </root>
+</configuration>

vertx/src/test/java/com/baeldung/RestServiceVerticleUnitTest.java

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+package com.baeldung;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import com.baeldung.rest.RestServiceVerticle;
+
+import io.vertx.core.DeploymentOptions;
+import io.vertx.core.Vertx;
+import io.vertx.core.json.JsonObject;
+import io.vertx.ext.unit.Async;
+import io.vertx.ext.unit.TestContext;
+import io.vertx.ext.unit.junit.VertxUnitRunner;
+
+@RunWith(VertxUnitRunner.class)
+public class RestServiceVerticleUnitTest {
+
+    private Vertx vertx;
+
+    private int port = 8081;
+
+    @BeforeClass
+    public static void beforeClass() {
+
+    }
+
+    @Before
+    public void setup(TestContext testContext) throws IOException {
+        vertx = Vertx.vertx();
+
+        // Pick an available and random
+        ServerSocket socket = new ServerSocket(0);
+        port = socket.getLocalPort();
+        socket.close();
+
+        DeploymentOptions options = new DeploymentOptions().setConfig(new JsonObject().put("http.port", port));
+
+        vertx.deployVerticle(RestServiceVerticle.class.getName(), options, testContext.asyncAssertSuccess());
+    }
+
+    @After
+    public void tearDown(TestContext testContext) {
+        vertx.close(testContext.asyncAssertSuccess());
+    }
+
+    @Test
+    public void givenId_whenReceivedArticle_thenSuccess(TestContext testContext) {
+        final Async async = testContext.async();
+
+        vertx.createHttpClient()
+            .getNow(port, "localhost", "/api/baeldung/articles/article/12345", response -> {
+                response.handler(responseBody -> {
+                    testContext.assertTrue(responseBody.toString()
+                        .contains("\"id\" : \"12345\""));
+                    async.complete();
+                });
+            });
+    }
+
+}

vertx/src/test/java/com/baeldung/SimpleServerVerticleUnitTest.java

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+package com.baeldung;
+
+import io.vertx.core.DeploymentOptions;
+import io.vertx.core.Vertx;
+import io.vertx.core.json.JsonObject;
+import io.vertx.ext.unit.Async;
+import io.vertx.ext.unit.TestContext;
+import io.vertx.ext.unit.junit.VertxUnitRunner;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+@RunWith(VertxUnitRunner.class)
+public class SimpleServerVerticleUnitTest {
+    private Vertx vertx;
+
+    private int port = 8081;
+
+    @Before
+    public void setup(TestContext testContext) throws IOException {
+        vertx = Vertx.vertx();
+
+        // Pick an available and random
+        ServerSocket socket = new ServerSocket(0);
+        port = socket.getLocalPort();
+        socket.close();
+
+        DeploymentOptions options = new DeploymentOptions().setConfig(new JsonObject().put("http.port", port));
+
+        vertx.deployVerticle(SimpleServerVerticle.class.getName(), options, testContext.asyncAssertSuccess());
+    }
+
+    @After
+    public void tearDown(TestContext testContext) {
+        vertx.close(testContext.asyncAssertSuccess());
+    }
+
+    @Test
+    public void whenReceivedResponse_thenSuccess(TestContext testContext) {
+        final Async async = testContext.async();
+
+        vertx.createHttpClient()
+            .getNow(port, "localhost", "/", response -> response.handler(responseBody -> {
+                testContext.assertTrue(responseBody.toString()
+                    .contains("Welcome"));
+                async.complete();
+            }));
+    }
+
+}