用Docker分分钟搭建起本地RocketMQ，实现最基础的收发消息。

参考原文：本地用docker快速搭建RocketMQ

下载rocketmq

docker pull rocketmqinc/rocketmq:4.4.0

配置文件

- broker配置文件

先想好你要把rocketmq产生的文件放在电脑哪个位置，下面把这个位置称为[RmHome]。

[RmHome]  最好是你用于测试的java项目的地址。如下图，这样你就可以直接在里面敲命令

在[RmHome]创建conf文件夹，在[RmHome]/conf中创建broker.conf文件，文件内容如下

brokerClusterName = DefaultCluster
brokerName = broker-a
brokerId = 0
deleteWhen = 04
fileReservedTime = 48
brokerRole = ASYNC_MASTER
flushDiskType = ASYNC_FLUSH
brokerIP1 = 你自己的IPv4 地址

- stack.yml

在[RmHome]创建stack.yml文件，内容如下：

version: '3.1'

services:

  rmqnamesrv:
    image: rocketmqinc/rocketmq:4.4.0
    command: sh mqnamesrv
    restart: always
    environment:
      MAX_POSSIBLE_HEAP: 100000000
    networks:
      mq-network:
        aliases:
          - rmqnamesrv
    volumes:
      - ./namesrv/logs:/root/logs
      - ./namesrv/store:/root/store
    ports:
      - 9876:9876

  broker:
    image: rocketmqinc/rocketmq:4.4.0
    command: sh mqbroker -c /opt/rocketmq-4.4.0/conf/broker.conf
    restart: always
    networks:
      mq-network:
        aliases:
          - broker
    environment:
      NAMESRV_ADDR: rmqnamesrv:9876
      MAX_POSSIBLE_HEAP: 200000000
    volumes:
      - ./broker/logs:/root/logs
      - ./broker/store:/root/store
      - ./conf/broker.conf:/opt/rocketmq-4.4.0/conf/broker.conf
    ports:
      - 10911:10911
      - 10909:10909
    depends_on:
      - rmqnamesrv
      
  console:
    image: styletang/rocketmq-console-ng
    environment:
      JAVA_OPTS: -Drocketmq.namesrv.addr=rmqnamesrv:9876 -Dcom.rocketmq.sendMessageWithVIPChannel=false -Dserver.port=8888
    networks:
      mq-network:
        aliases:
          - console
    ports:
      - 8888:8888
    depends_on:
      - rmqnamesrv
      - broker
      
networks:
  mq-network:
    driver: bridge

用Docker启动rocketMQ

命令行在[RmHome]路径下敲以下命令：

docker-compose -f stack.yml up

访问控制台

RocketMq控制台

IDEA 创建测试项目

生产者，不用修改，直接复制，本地测试是没问题的。

public class SyncProducer {
    public static void main(String[] args) throws Exception {
        // 实例化消息生产者Producer
        DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
        // 设置NameServer的地址
        producer.setNamesrvAddr("localhost:9876");
        // 启动Producer实例
        producer.start();
        for (int i = 0; i < 2; i++) {
            // 创建消息，并指定Topic，Tag和消息体
            Message msg = new Message("TopicTest" , "TagA" , ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET)
            );
            // 发送消息到一个Broker
            SendResult sendResult = producer.send(msg);
            // 通过sendResult返回消息是否成功送达
            System.out.printf("生产消息啦"+"%s%n", sendResult);
        }
        // 如果不再发送消息，关闭Producer实例。
        producer.shutdown();
    }
}

消费者 不用修改，直接复制，本地测试是没问题的。

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() {
            public ConsumeConcurrentlyStatus consumeMessage(List msgs, ConsumeConcurrentlyContext consumeConcurrentlyContext) {
          
                for (MessageExt msg : msgs) {
                    System.out.println(msg.getTopic());
                    System.out.println(msg.getTags());
                    System.out.println("收到消息:" + new String(msg.getBody()));
                }

                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });

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

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

发送消息成功

 消费消息成功