RocketMQ实战与原理---安装、部署及简单应用

RocketMQ实战与原理

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第一章  安装、部署及简单应用

1. 安装

1.1 下载RocketMQ

2. 部署

2.1 部署nameserver

2.2 部署broker

2.3 新增Topic

3. 简单应用

3.1 运行Producer

3.2 运行Consumer

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第一章  安装、部署及简单应用

1. 安装

1.1 下载RocketMQ

RocketMQ下载地址：http://rocketmq.apache.org/release_notes/release-notes-4.3.0

选择rocketmq-all-4.3.0-bin-release.zip下载

将其解压，注意解压目录名不能带有空格

2. 部署

命令、参数、代码详解比较复杂，故放后面说明，此处只写部署步骤及运行代码，保证可搭建部署简单的应用

2.1 部署nameserver

进入bin目录下，运行start mqnamesrv.cmd，出现The Name Server boot success.即代表nameserver启动成功

2.2 部署broker

bin目录下，运行start mqbroker.cmd -n 127.0.0.1:9876，出现The broker boot success.即代表broker启动成功

2.3 新增Topic

bin目录下，运行mqadmin.cmd updateTopic -n 127.0.0.1 -b 127.0.0.1:10911 -t TopicTest，出现create topic success.即代表topic新增成功

3. 简单应用

3.1 运行Producer

运行程序，将会发送100条消息

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;

/**
 * @Author: Wen-Xueliang
 * @Date: Created in 2019/12/14 14:04
 * @Description: Reliable synchronous transmission is used in extensive scenes, such as important notification messages, SMS notification, SMS marketing system, etc..
 */
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();
    }
}

3.2 运行Consumer

运行程序，则会接受100条消息

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;

/**
 * @Author: Wen-Xueliang
 * @Date: Created in 2019/12/14 14:05
 * @Description:
 */
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");
    }
}

至此，我们就完成了将RocketMQ安装部署在Windows系统，并运行第一个程序，由生产者生产100条消息，运行第二个程序，由消费者消费100条消息。

后续，将继续阐述RocketMQ的高级应用以及源码的解析。