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Rocketmq java hello world 入门案例

news 来源：原创 2024/5/20 1:28:54

从零手写实现 mq

rocketmq java 入门案例

整体结构

|____src
| |____main
| | |____java
| | | |____com
| | | | |____ryo
| | | | | |____rocket
| | | | | | |____demo
| | | | | | | |____common
| | | | | | | | |____consumer
| | | | | | | | | |____Consumer.java
| | | | | | | | |____productor
| | | | | | | | | |____Productor.java
| | |____resources
| | | |____log4j.properties

maven 依赖

pom.xml

<dependencies><!--rocketmq--><dependency><groupId>com.alibaba.rocketmq</groupId><artifactId>rocketmq-client</artifactId><version>${rocketmq.version}</version></dependency><dependency><groupId>com.alibaba.rocketmq</groupId><artifactId>rocketmq-common</artifactId><version>${rocketmq.version}</version></dependency><dependency><groupId>com.alibaba.rocketmq</groupId><artifactId>rocketmq-remoting</artifactId><version>${rocketmq.version}</version></dependency><!--log--><dependency><groupId>org.slf4j</groupId><artifactId>jcl-over-slf4j</artifactId><version>1.7.7</version></dependency><dependency><groupId>org.slf4j</groupId><artifactId>slf4j-log4j12</artifactId><version>1.7.7</version></dependency><dependency><groupId>log4j</groupId><artifactId>log4j</artifactId><version>1.2.17</version></dependency>
</dependencies>

配置

log4j.properties

log4j.rootLogger=warn, stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%t] %d{MM-dd HH:mm:ss,SSS} - %m%n

代码

Consumer.java

/*** @author houbinbin* @on 17/1/2*/
public class Productor {public static void main(String[] args) {DefaultMQProducer producer = new DefaultMQProducer("Producer");producer.setNamesrvAddr("127.0.0.1:9876");try {producer.start();Message message = new Message("PushTopic", "push", "1", "Just fot test.".getBytes());SendResult result = producer.send(message);System.out.println("id:" + result.getMsgId() + " result:" + result.getSendStatus());message = new Message("PushTopic", "push", "3", "Just fot test.".getBytes());result = producer.send(message);System.out.println("id:" + result.getMsgId() + " result:" + result.getSendStatus());} catch (Exception e) {e.printStackTrace();} finally {producer.shutdown();}}
}

运行LOG如下:

id:C0A8026600002A9F000000000000011A result:SEND_OK
id:C0A8026600002A9F00000000000001A7 result:SEND_OK

Consumer.java

/*** @author houbinbin* @on 17/1/4*/
public class Consumer {public static void main(String[] args) {DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("PushConsumer");consumer.setNamesrvAddr("127.0.0.1:9876");try {// 订阅PushTopic下的Tag未push的消息consumer.subscribe("PushTopic", "push");// 程序第一次启动从消息队列头取数据consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET);consumer.registerMessageListener(new MessageListenerConcurrently() {@Overridepublic ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) {Message message = msgs.get(0);System.err.println(message.toString());return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;}});consumer.start();} catch (Exception e) {e.printStackTrace();}}
}

运行LOG如下:

MessageExt [queueId=1, storeSize=141, queueOffset=1, sysFlag=0, bornTimestamp=1483460812589, bornHost=/192.168.2.102:54835, storeTimestamp=1483460812590, storeHost=/192.168.2.102:10911, msgId=C0A8026600002A9F00000000000001A7, commitLogOffset=423, bodyCRC=1329428386, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=PushTopic, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=2, KEYS=3, WAIT=true, TAGS=push}, body=14]]
MessageExt [queueId=0, storeSize=141, queueOffset=1, sysFlag=0, bornTimestamp=1483460812558, bornHost=/192.168.2.102:54835, storeTimestamp=1483460812575, storeHost=/192.168.2.102:10911, msgId=C0A8026600002A9F000000000000011A, commitLogOffset=282, bodyCRC=1329428386, reconsumeTimes=0, preparedTransactionOffset=0, toString()=Message [topic=PushTopic, flag=0, properties={MIN_OFFSET=0, MAX_OFFSET=2, KEYS=1, WAIT=true, TAGS=push}, body=14]]