How to integrate RocketMQ Client 3.6.2.final framework (How to Integrate RocketMQ Client 3.6.2.final Framework in Java Class Libraries)

How to integrate RocketMQ Client 3.6.2.final framework in the Java library RocketMQ is a distributed message intermediate part of Alibaba's open source, which is widely used in message communication in large -scale distributed systems.RocketMQ Client is a Java implementation of RocketMQ, which can be directly integrated into the Java application. This article will guide you how to integrate Rocketmq Client 3.6.2.final framework in the Java class library.We will introduce how to build the RocketMQ environment, download the RocketMQ Client 3.6.2.2.final framework, create a Java -class library project, and add RocketMQ Client to the project dependence, write the Java code to publish and subscribe with the RocketMQ Client. Step 1: Create the RocketMQ environment First, you need to build a ROCKETMQ service in your development environment.You can download the binary package of RocketMQ from the official website of RocketMQ (https://rocketmq.apache.org/), and install and configure according to the guide of the official documentation. Step 2: Download RocketMQ Client 3.6.2.final framework On the download page of the RocketMQ official website, find the download link of the RocketMQ Client 3.6.2.2.final and download the corresponding jar file. Step 3: Create the Java class library project Create a new Java -class library project with your IDE (such as Eclipse or Intellij IDEA).In the project, create a new Java class. Step 4: Add RocketMQ Client to the project dependence The Rocketmq Client 3.6.2.final jar file downloaded from the official website of RocketMQ is copied to the class path of your Java library project.Then, add the jar file to the project's dependence in the IDE building path or Maven's pom.xml file. For the Maven project, add the following code to the DEENDENCIES section of the pom.xml file: <dependency> <groupId>org.apache.rocketmq</groupId> <artifactId>rocketmq-client</artifactId> <version>3.6.2</version> </dependency> Step 5: Write java code Now, you can write code in the Java class to publish and subscribe to the message with RocketMQ Client. First of all, create a producer and post message to RocketMQ: import org.apache.rocketmq.client.producer.DefaultMQProducer; import org.apache.rocketmq.common.message.Message; public class RocketMQProducer { public static void main(String[] args) throws Exception { // Example message producer Producer DefaultMQProducer producer = new DefaultMQProducer("producer_group"); // Set the nameServer address producer.setNamesrvAddr("localhost:9876"); // Start the Produceer instance producer.start(); // Create message objects Message message = new Message("topic", "tag", "Hello RocketMQ".getBytes()); // Send a message producer.send(message); // Close the Producer instance producer.shutdown(); } } Next, create a consumer to subscribe to and receive the message from RocketMQ: import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer; import org.apache.rocketmq.client.exception.MQClientException; import org.apache.rocketmq.common.consumer.ConsumeFromWhere; import org.apache.rocketmq.common.message.MessageExt; public class RocketMQConsumer { public static void main(String[] args) throws MQClientException { // instantiated consumer Consumer DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("consumer_group"); // Set the nameServer address consumer.setNamesrvAddr("localhost:9876"); // Start consumer message from the specified location consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET); // Subscribe to message consumer.subscribe("topic", "*"); // Register a message processor consumer.registerMessageListener((MessageListenerConcurrently) (msgs, context) -> { for (MessageExt msg : msgs) { // Treat the message System.out.println(new String(msg.getBody())); } return ConsumeConcurrentlyStatus.CONSUME_SUCCESS; }); // Start consumer example consumer.start(); } } After the writing of the above code, you successfully integrate the RocketMQ Client 3.6.2.final framework into the Java library.You can customize the logic of sending messages and receiving messages as needed. I hope this article can help you integrate RocketMQ Client 3.6.2.final framework in the Java class library!