RocketMQ实践之有序消息（三）

于 2021-10-10 21:30:52 发布
阅读量139 收藏
点赞数
分类专栏： 消息队列 文章标签： RocketMQ
版权声明：本文为博主原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接和本声明。
本文链接：https://blog.youkuaiyun.com/xk4848123/article/details/120689255
版权
此示例展示了Apache RocketMQ的有序生产与消费。`OrderedProducer`类发送带有订单号(orderId)的消息到指定主题，使用MessageQueueSelector确保消息按顺序发送。`OrderedConsumer`类订阅主题并注册有序消息监听器，消费消息时保持消息顺序。运行示例，观察到消费者线程按预期顺序处理消息。

摘要生成于 C知道 ，由 DeepSeek-R1 满血版支持， 前往体验 >

发送消息：

package my.demo;

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

import java.util.List;

public class OrderedProducer {
    public static void main(String[] args) throws Exception {
        DefaultMQProducer producer = new DefaultMQProducer("p_group5");
        producer.setNamesrvAddr("localhost:9876");
        producer.start();
        String[] tags = new String[] {"TagA", "TagB", "TagC", "TagD", "TagE"};
        for (int i = 0; i < 100; i++) {
            int orderId = i % 10;
            Message msg = new Message("TopicTestjjj", tags[i % tags.length], "KEY" + i,
                    ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET));
            SendResult sendResult = producer.send(msg, new MessageQueueSelector() {
            @Override
            public MessageQueue select(List<MessageQueue> mqs, Message msg, Object arg) {
                Integer id = (Integer) arg;
                int index = id % mqs.size();
                return mqs.get(index);
            }
            }, orderId);//此处orderId会被传入回调方法select中，对应arg参数

            System.out.printf("%s%n", sendResult);
        }
        producer.shutdown();
    }
}

接收消息：

package my.demo;

import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeOrderlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerOrderly;
import org.apache.rocketmq.common.consumer.ConsumeFromWhere;


public class OrderedConsumer {
    public static void main(String[] args) throws Exception {
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("c_group10");

        consumer.setNamesrvAddr("localhost:9876");

        consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);

        consumer.subscribe("TopicTestjjjj", "TagA || TagC || TagD");

        consumer.registerMessageListener((MessageListenerOrderly) (msgs, context) -> {
            msgs.stream().forEach(msg -> System.out.println("currentThread:" + Thread.currentThread().getName() + "queueId:" + msg.getQueueId() + "content:" + new String(msg.getBody())));
            return ConsumeOrderlyStatus.SUCCESS;
        });

        consumer.start();

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

效果展示：

D:\dev\Java\jdk1.8.0_261\bin\java.exe "-javaagent:D:\dev\IntelliJ IDEA 2021.2\lib\idea_rt.jar=54937:D:\dev\IntelliJ IDEA 2021.2\bin" -Dfile.encoding=UTF-8 -classpath D:\dev\Java\jdk1.8.0_261\jre\lib\charsets.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\deploy.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\access-bridge-64.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\cldrdata.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\dnsns.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\jaccess.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\jfxrt.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\localedata.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\nashorn.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\sunec.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\sunjce_provider.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\sunmscapi.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\sunpkcs11.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\ext\zipfs.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\javaws.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\jce.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\jfr.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\jfxswt.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\jsse.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\management-agent.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\plugin.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\resources.jar;D:\dev\Java\jdk1.8.0_261\jre\lib\rt.jar;D:\dev\code\koala\rocket-mq\target\classes;C:\Users\Administrator\.m2\repository\org\apache\rocketmq\rocketmq-client\4.9.1\rocketmq-client-4.9.1.jar;C:\Users\Administrator\.m2\repository\org\apache\rocketmq\rocketmq-common\4.9.1\rocketmq-common-4.9.1.jar;C:\Users\Administrator\.m2\repository\org\apache\rocketmq\rocketmq-remoting\4.9.1\rocketmq-remoting-4.9.1.jar;C:\Users\Administrator\.m2\repository\com\alibaba\fastjson\1.2.76\fastjson-1.2.76.jar;C:\Users\Administrator\.m2\repository\io\netty\netty-all\4.1.65.Final\netty-all-4.1.65.Final.jar;C:\Users\Administrator\.m2\repository\org\apache\rocketmq\rocketmq-logging\4.9.1\rocketmq-logging-4.9.1.jar;C:\Users\Administrator\.m2\repository\commons-validator\commons-validator\1.7\commons-validator-1.7.jar;C:\Users\Administrator\.m2\repository\commons-beanutils\commons-beanutils\1.9.4\commons-beanutils-1.9.4.jar;C:\Users\Administrator\.m2\repository\commons-digester\commons-digester\2.1\commons-digester-2.1.jar;C:\Users\Administrator\.m2\repository\commons-logging\commons-logging\1.2\commons-logging-1.2.jar;C:\Users\Administrator\.m2\repository\commons-collections\commons-collections\3.2.2\commons-collections-3.2.2.jar;C:\Users\Administrator\.m2\repository\org\apache\commons\commons-lang3\3.4\commons-lang3-3.4.jar;C:\Users\Administrator\.m2\repository\commons-codec\commons-codec\1.9\commons-codec-1.9.jar my.demo.OrderedConsumer
Consumer Started.
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:2
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_1queueId:2content:Hello RocketMQ orderId:6
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:1
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:5
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8
currentThread:ConsumeMessageThread_3queueId:1content:Hello RocketMQ orderId:9
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:0
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:3
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:4
currentThread:ConsumeMessageThread_2queueId:3content:Hello RocketMQ orderId:7
currentThread:ConsumeMessageThread_4queueId:0content:Hello RocketMQ orderId:8

顺序消费同样的currentThread一定对应同样的queueId，而queue的选择是按照orderId对队列数取余的，可以看出我实验中Topic：TopicTestjjjj对应的队列数是4个，那就是orderId对4取余，结果没有问题的。

评论
添加红包

请填写红包祝福语或标题

个

红包个数最小为10个

元

红包金额最低5元

当前余额3.43元 前往充值 >
需支付：10.00元
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包
实付元
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明：

1.余额是钱包充值的虚拟货币，按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载，可以购买VIP、付费专栏及课程。

余额充值