【RocketMq实战第二篇】-SpringBoot集成RocketMq

客官°小女子只卖身不卖艺 2022-03-24 14:52 411阅读 0赞

## 前言 ##

本文笔者是一波三折啊，很多人像我一样第一次在springboot里搞rocketmq的，遇到各种麻烦，我也是一样，就比如：

踩坑：

*  nameserver启动成功了，broker启动失败，然后broker日志文件没有生成，错误原因也找不到。
 *  在java里发送消息时发送失败，幸好有报错信息\[Send \[3\] times, still failed\]，就是重发三次也没发出去的意思。网上资料说是broker启动方式不对，然而并没有解决
 *  ……

本文是简单的使用发送消息和消费消息，让大家了解一下流程。

## 正文 ##

在此之前我们要启动一个nameserver和一个broker

上文我已经介绍了，链接如下：[启动消息服务][Link 1]

**第一步**

创建一个maven项目，pom文件如下：

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
        <groupId>rocketmq_demo</groupId>
        <artifactId>rocketmq_demo</artifactId>
        <version>1.0.0</version>
        <packaging>jar</packaging>
        <parent>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-parent</artifactId>
            <version>2.0.0.RELEASE</version>
        </parent>
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-actuator</artifactId>
            </dependency>
            <dependency>
                <groupId>org.apache.rocketmq</groupId>
                <artifactId>rocketmq-tools</artifactId>
                <version>4.2.0</version>
            </dependency>
        </dependencies>
    </project>

**第二步**

创建启动类，RocketMQApp，这个启动类当作生产者

package com;
    
    import org.apache.rocketmq.client.exception.MQClientException;
    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;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    
    /**
     * @author yanlin
     * @version v1.3
     * @date 2019-01-24 3:43 PM
     * @since v8.0
     **/
    @SpringBootApplication
    public class RocketMQApp {
        public static void main(String[] args) throws MQClientException, InterruptedException {
            SpringApplication.run(RocketMQApp.class, args);
            DefaultMQProducer producer = new DefaultMQProducer("please_rename_unique_group_name");
            producer.setNamesrvAddr("127.0.0.1:9876");
            producer.start();
            for (int i = 0; i < 20; i++) {
                try {
                    Message msg = new Message("TopicTest" /* Topic */,
                            "TagA" /* Tag */,
                            ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
                    );
                    SendResult sendResult = producer.send(msg);
                    System.out.printf("%s%n", sendResult);
                } catch (Exception e) {
                    e.printStackTrace();
                    Thread.sleep(1000);
                }
            }
            producer.shutdown();
        }
    }

**第三步**

创建消费者 RocketMQConsumer，代码如下

package com.rocketmq;
    
    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.consumer.ConsumeFromWhere;
    import org.apache.rocketmq.common.message.MessageExt;
    
    import java.util.List;
    
    /**
     * @author yanlin
     * @version v1.3
     * @date 2019-01-24 3:24 PM
     * @since v8.0
     **/
    public class RocketMQConsumer {
        public static void main(String[] args) throws MQClientException {
            DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("please_rename_unique_group_name");
            consumer.setNamesrvAddr("127.0.0.1:9876");
            consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);
            consumer.subscribe("TopicTest", "*");
            consumer.registerMessageListener(new MessageListenerConcurrently() {
                @Override
                public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs,
                                                                ConsumeConcurrentlyContext context) {
                    System.out.printf(Thread.currentThread().getName() + " Receive New Messages: " + msgs + "%n");
                    return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
                }
            });
            consumer.start();
            System.out.printf("Consumer Started.%n");
        }
    }

**最后一步**

右键启动启动类-RocketMQApp，观察控制台：

主要发送消息的日志如下

SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94180000, offsetMsgId=0A08406F00002A9F0000000000058B56, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=0], queueOffset=505]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94270001, offsetMsgId=0A08406F00002A9F0000000000058C08, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=1], queueOffset=505]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D942A0002, offsetMsgId=0A08406F00002A9F0000000000058CBA, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=2], queueOffset=505]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D942D0003, offsetMsgId=0A08406F00002A9F0000000000058D6C, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=3], queueOffset=505]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D942F0004, offsetMsgId=0A08406F00002A9F0000000000058E1E, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=0], queueOffset=506]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94310005, offsetMsgId=0A08406F00002A9F0000000000058ED0, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=1], queueOffset=506]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D943C0006, offsetMsgId=0A08406F00002A9F0000000000058F82, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=2], queueOffset=506]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D943E0007, offsetMsgId=0A08406F00002A9F0000000000059034, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=3], queueOffset=506]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94410008, offsetMsgId=0A08406F00002A9F00000000000590E6, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=0], queueOffset=507]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94440009, offsetMsgId=0A08406F00002A9F0000000000059198, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=1], queueOffset=507]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D944C000A, offsetMsgId=0A08406F00002A9F000000000005924A, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=2], queueOffset=507]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D944E000B, offsetMsgId=0A08406F00002A9F00000000000592FD, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=3], queueOffset=507]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D9452000C, offsetMsgId=0A08406F00002A9F00000000000593B0, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=0], queueOffset=508]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D9455000D, offsetMsgId=0A08406F00002A9F0000000000059463, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=1], queueOffset=508]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D945A000E, offsetMsgId=0A08406F00002A9F0000000000059516, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=2], queueOffset=508]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D945E000F, offsetMsgId=0A08406F00002A9F00000000000595C9, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=3], queueOffset=508]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94600010, offsetMsgId=0A08406F00002A9F000000000005967C, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=0], queueOffset=509]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94650011, offsetMsgId=0A08406F00002A9F000000000005972F, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=1], queueOffset=509]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D94670012, offsetMsgId=0A08406F00002A9F00000000000597E2, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=2], queueOffset=509]
    SendResult [sendStatus=SEND_OK, msgId=0A08406F070318B4AAC27A2D946C0013, offsetMsgId=0A08406F00002A9F0000000000059895, messageQueue=MessageQueue [topic=TopicTest, brokerName=yanlin.local, queueId=3], queueOffset=509]

右键启动消费者-RocketMQConsumer，观察控制台如下

Receive New Messages 后面的就是消息主体

ConsumeMessageThread_1 Receive New Messages: [MessageExt [queueId=0, storeSize=178, queueOffset=505, sysFlag=0, bornTimestamp=1548321807386, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807396, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000058B56, commitLogOffset=363350, bodyCRC=613185359, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=506, CONSUME_START_TIME=1548321807411, UNIQ_KEY=0A08406F070318B4AAC27A2D94180000, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_2 Receive New Messages: [MessageExt [queueId=1, storeSize=178, queueOffset=505, sysFlag=0, bornTimestamp=1548321807400, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807400, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000058C08, commitLogOffset=363528, bodyCRC=1401636825, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=506, CONSUME_START_TIME=1548321807411, UNIQ_KEY=0A08406F070318B4AAC27A2D94270001, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_5 Receive New Messages: [MessageExt [queueId=0, storeSize=178, queueOffset=506, sysFlag=0, bornTimestamp=1548321807407, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807408, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000058E1E, commitLogOffset=364062, bodyCRC=601994070, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=507, CONSUME_START_TIME=1548321807413, UNIQ_KEY=0A08406F070318B4AAC27A2D942F0004, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_4 Receive New Messages: [MessageExt [queueId=3, storeSize=178, queueOffset=505, sysFlag=0, bornTimestamp=1548321807405, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807406, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000058D6C, commitLogOffset=363884, bodyCRC=1032136437, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=506, CONSUME_START_TIME=1548321807412, UNIQ_KEY=0A08406F070318B4AAC27A2D942D0003, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_3 Receive New Messages: [MessageExt [queueId=2, storeSize=178, queueOffset=505, sysFlag=0, bornTimestamp=1548321807402, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807403, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000058CBA, commitLogOffset=363706, bodyCRC=1250039395, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=506, CONSUME_START_TIME=1548321807413, UNIQ_KEY=0A08406F070318B4AAC27A2D942A0002, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_6 Receive New Messages: [MessageExt [queueId=1, storeSize=178, queueOffset=506, sysFlag=0, bornTimestamp=1548321807409, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807415, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000058ED0, commitLogOffset=364240, bodyCRC=1424393152, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=507, CONSUME_START_TIME=1548321807418, UNIQ_KEY=0A08406F070318B4AAC27A2D94310005, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_7 Receive New Messages: [MessageExt [queueId=2, storeSize=178, queueOffset=506, sysFlag=0, bornTimestamp=1548321807420, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807421, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000058F82, commitLogOffset=364418, bodyCRC=1307562618, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=507, CONSUME_START_TIME=1548321807423, UNIQ_KEY=0A08406F070318B4AAC27A2D943C0006, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_8 Receive New Messages: [MessageExt [queueId=3, storeSize=178, queueOffset=506, sysFlag=0, bornTimestamp=1548321807422, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807423, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000059034, commitLogOffset=364596, bodyCRC=988340972, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=507, CONSUME_START_TIME=1548321807426, UNIQ_KEY=0A08406F070318B4AAC27A2D943E0007, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_9 Receive New Messages: [MessageExt [queueId=0, storeSize=178, queueOffset=507, sysFlag=0, bornTimestamp=1548321807425, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807427, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F00000000000590E6, commitLogOffset=364774, bodyCRC=710410109, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=508, CONSUME_START_TIME=1548321807430, UNIQ_KEY=0A08406F070318B4AAC27A2D94410008, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_10 Receive New Messages: [MessageExt [queueId=1, storeSize=178, queueOffset=507, sysFlag=0, bornTimestamp=1548321807428, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807430, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000059198, commitLogOffset=364952, bodyCRC=1565577195, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=508, CONSUME_START_TIME=1548321807432, UNIQ_KEY=0A08406F070318B4AAC27A2D94440009, WAIT=true, TAGS=TagA}, body=16]]]
    ConsumeMessageThread_11 Receive New Messages: [MessageExt [queueId=2, storeSize=179, queueOffset=507, sysFlag=0, bornTimestamp=1548321807436, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807437, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F000000000005924A, commitLogOffset=365130, bodyCRC=193412630, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=508, CONSUME_START_TIME=1548321807439, UNIQ_KEY=0A08406F070318B4AAC27A2D944C000A, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_12 Receive New Messages: [MessageExt [queueId=3, storeSize=179, queueOffset=507, sysFlag=0, bornTimestamp=1548321807438, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807439, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F00000000000592FD, commitLogOffset=365309, bodyCRC=2088767104, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=508, CONSUME_START_TIME=1548321807442, UNIQ_KEY=0A08406F070318B4AAC27A2D944E000B, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_13 Receive New Messages: [MessageExt [queueId=0, storeSize=179, queueOffset=508, sysFlag=0, bornTimestamp=1548321807442, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807443, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F00000000000593B0, commitLogOffset=365488, bodyCRC=1703501626, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=509, CONSUME_START_TIME=1548321807447, UNIQ_KEY=0A08406F070318B4AAC27A2D9452000C, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_14 Receive New Messages: [MessageExt [queueId=1, storeSize=179, queueOffset=508, sysFlag=0, bornTimestamp=1548321807445, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807446, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000059463, commitLogOffset=365667, bodyCRC=311324588, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=509, CONSUME_START_TIME=1548321807448, UNIQ_KEY=0A08406F070318B4AAC27A2D9455000D, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_15 Receive New Messages: [MessageExt [queueId=2, storeSize=179, queueOffset=508, sysFlag=0, bornTimestamp=1548321807450, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807451, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000059516, commitLogOffset=365846, bodyCRC=216726031, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=509, CONSUME_START_TIME=1548321807453, UNIQ_KEY=0A08406F070318B4AAC27A2D945A000E, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_16 Receive New Messages: [MessageExt [queueId=3, storeSize=179, queueOffset=508, sysFlag=0, bornTimestamp=1548321807454, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807454, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F00000000000595C9, commitLogOffset=366025, bodyCRC=2079181465, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=509, CONSUME_START_TIME=1548321807457, UNIQ_KEY=0A08406F070318B4AAC27A2D945E000F, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_17 Receive New Messages: [MessageExt [queueId=0, storeSize=179, queueOffset=509, sysFlag=0, bornTimestamp=1548321807456, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807458, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F000000000005967C, commitLogOffset=366204, bodyCRC=1659149091, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=510, CONSUME_START_TIME=1548321807460, UNIQ_KEY=0A08406F070318B4AAC27A2D94600010, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_18 Receive New Messages: [MessageExt [queueId=1, storeSize=179, queueOffset=509, sysFlag=0, bornTimestamp=1548321807461, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807462, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F000000000005972F, commitLogOffset=366383, bodyCRC=367242165, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=510, CONSUME_START_TIME=1548321807464, UNIQ_KEY=0A08406F070318B4AAC27A2D94650011, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_19 Receive New Messages: [MessageExt [queueId=2, storeSize=179, queueOffset=509, sysFlag=0, bornTimestamp=1548321807463, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807467, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F00000000000597E2, commitLogOffset=366562, bodyCRC=89962020, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=510, CONSUME_START_TIME=1548321807469, UNIQ_KEY=0A08406F070318B4AAC27A2D94670012, WAIT=true, TAGS=TagA}, body=17]]]
    ConsumeMessageThread_20 Receive New Messages: [MessageExt [queueId=3, storeSize=179, queueOffset=509, sysFlag=0, bornTimestamp=1548321807468, bornHost=/10.8.64.111:50266, storeTimestamp=1548321807469, storeHost=/10.8.64.111:10911, msgId=0A08406F00002A9F0000000000059895, commitLogOffset=366741, bodyCRC=1918600882, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=TopicTest, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=510, CONSUME_START_TIME=1548321807471, UNIQ_KEY=0A08406F070318B4AAC27A2D946C0013, WAIT=true, TAGS=TagA}, body=17]]]

我们发送了20条，然后成功消费20条，这就是rocketmq最简单的应用案例了。以后的篇幅我就会讲解更细致的内容，让大家能适用任何场景下，让大家了解各个对象的原理。

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![20190116141354298.jpeg][]

[Link 1]: https://blog.csdn.net/weixin_38003389/article/details/86505677
[20190116141354298.jpeg]: /images/20220323/908c1c7d1b1341fd81d94824f123a1ac.png