搭建RocketMq入門程序

 

前提條件我們已經成功啓動mqnamesrv.cmd 以及mqbroker.cmd

(如沒啓動可參考我上一個文章 ，RocketMq配置)

linux 和windows都可以

1.1. 添加依賴

Maven 版本自行選擇  

   <dependency>
        <groupId>org.apache.rocketmq</groupId>
        <artifactId>rocketmq-client</artifactId>
        <version>4.3.0</version>
    </dependency>

本示例採用maven

或者gradle:

compile 'org.apache.rocketmq:rocketmq-client:4.3.0'

2.生產者

 

--------------以下三個生產者，取自官網。自行可簡單修改下。好對照結果--------

2.1同步生產者

可靠的同步傳輸在廣泛的場景中使用，如重要的通知消息、短信通知、短信營銷系統等。

 

public class SyncProducer {
    public static void main(String[] args) throws Exception {
        //Instantiate with a producer group name.
        DefaultMQProducer producer = new
            DefaultMQProducer("please_rename_unique_group_name");
        // Specify name server addresses.
        producer.setNamesrvAddr("localhost:9876");
        //Launch the instance.
        producer.start();
        for (int i = 0; i < 100; i++) {
            //Create a message instance, specifying topic, tag and message body.
            Message msg = new Message("TopicTest" /* Topic */,
                "TagA" /* Tag */,
                ("Hello RocketMQ " +
                    i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
            );
            //Call send message to deliver message to one of brokers.
            SendResult sendResult = producer.send(msg);
            System.out.printf("%s%n", sendResult);
        }
        //Shut down once the producer instance is not longer in use.
        producer.shutdown();
    }
}

2.2異步生產者

異步傳輸通常用於響應時間敏感的業務場景。

public class AsyncProducer {
    public static void main(String[] args) throws Exception {
        //Instantiate with a producer group name.
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        // Specify name server addresses.
        producer.setNamesrvAddr("localhost:9876");
        //Launch the instance.
        producer.start();
        producer.setRetryTimesWhenSendAsyncFailed(0);
        for (int i = 0; i < 100; i++) {
                final int index = i;
                //Create a message instance, specifying topic, tag and message body.
                Message msg = new Message("TopicTest",
                    "TagA",
                    "OrderID188",
                    "Hello world".getBytes(RemotingHelper.DEFAULT_CHARSET));
                producer.send(msg, new SendCallback() {
                    @Override
                    public void onSuccess(SendResult sendResult) {
                        System.out.printf("%-10d OK %s %n", index,
                            sendResult.getMsgId());
                    }
                    @Override
                    public void onException(Throwable e) {
                        System.out.printf("%-10d Exception %s %n", index, e);
                        e.printStackTrace();
                    }
                });
        }
        //Shut down once the producer instance is not longer in use.
        producer.shutdown();
    }
}

2.3單向傳輸生產者

單向傳輸用於需要中等可靠性的情況，如日誌收集。（日誌收集的話可以選用kafka）

public class OnewayProducer {
    public static void main(String[] args) throws Exception{
        //Instantiate with a producer group name.
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        // Specify name server addresses.
        producer.setNamesrvAddr("localhost:9876");
        //Launch the instance.
        producer.start();
        for (int i = 0; i < 100; i++) {
            //Create a message instance, specifying topic, tag and message body.
            Message msg = new Message("TopicTest" /* Topic */,
                "TagA" /* Tag */,
                ("Hello RocketMQ " +
                    i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
            );
            //Call send message to deliver message to one of brokers.
            producer.sendOneway(msg);

        }
        //Shut down once the producer instance is not longer in use.
        producer.shutdown();
    }
}

3.0消費者

不同的生產者，我們都可以使用相同的消費者進行消費

public class Consumer {

    public static void main(String[] args) throws InterruptedException, MQClientException {

        // Instantiate with specified consumer group name.
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name");
         
        // Specify name server addresses.
        consumer.setNamesrvAddr("localhost:9876");
        
        // Subscribe one more more topics to consume.
        consumer.subscribe("TopicTest", "*");
        // Register callback to execute on arrival of messages fetched from brokers.
        consumer.registerMessageListener(new MessageListenerConcurrently() {

            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                ConsumeConcurrentlyContext context) {
                System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        //Launch the consumer instance.
        consumer.start();

        System.out.printf("Consumer Started.%n");
    }
}

4.idea創建一個springboot項目

 

添加maven

項目結構如圖

分別採用上面消費者和生產者的代碼（此處爲同步生產者）

 

 

對官網的同步生產者進行簡單修改如下

package com.work.mq.producer;

import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.common.RemotingHelper;

/**
 * @Description: 同步消息
 * @Date: 2020/4/17 14:03
 * @Author: luch
 * @Version: 1.0
 **/
public class SyncProducer {

    public static void main(String[] args) throws Exception {
        //Instantiate with a producer group name.
        DefaultMQProducer producer = new
                DefaultMQProducer("mqgroup");
        // Specify name server addresses.
        producer.setNamesrvAddr("localhost:9876");
        //Launch the instance.
        producer.start();
        for (int i = 0; i < 10; i++) {
            //Create a message instance, specifying topic, tag and message body.
            Message msg = new Message("test" /* Topic */,
                    "TagA" /* Tag */,
                    ("Hello RocketMQ " +  i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
            );
            //Call send message to deliver message to one of brokers.
            SendResult sendResult = producer.send(msg);
            System.out.printf("%s%n", sendResult);
        }
        //Shut down once the producer instance is not longer in use.
        producer.shutdown();
    }
}

消費者修改如下

package com.work.mq.customer;

import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.message.MessageExt;

import java.util.List;

/**
 * @Description:
 * @Date: 2020/4/17 14:02
 * @Author: luch
 * @Version: 1.0
 **/
public class Consumer {
    public static void main(String[] args) throws InterruptedException, MQClientException {

        // Instantiate with specified consumer group name.
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("mqgroup");

        // Specify name server addresses.
        consumer.setNamesrvAddr("localhost:9876");

        // Subscribe one more more topics to consume.
        consumer.subscribe("test", "*");
        // Register callback to execute on arrival of messages fetched from brokers.
        consumer.registerMessageListener(new MessageListenerConcurrently() {

            @Override
            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                                                            ConsumeConcurrentlyContext context) {
                for( MessageExt msg:msgs){
                    String s = new String(msg.getBody());

                    System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(),  s);
                }
//                System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

        //Launch the consumer instance.
        consumer.start();

        System.out.printf("Consumer Started.%n");
    }
}

 

 

引入類時注意，需要引入Rocket包

 

4.2.測試

先啓動生產者

查看控制檯，數據發送成功

然後再啓動消費者

查看控制檯，數據接收成功

可測試單向以及異步，結果都是消費者能夠成功消費