pom.xml
<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>net.datafans</groupId> <artifactId>net.datafans.exercise.rocketmq</artifactId> <version>0.0.1-SNAPSHOT</version> <dependencies> <dependency> <groupId>com.alibaba.rocketmq</groupId> <artifactId>rocketmq-client</artifactId> <version>3.0.10.1</version> </dependency> </dependencies> </project>
Consumer.java
/** * @Title: Consumer.java * @Package net.datafans.exercise.rocketmq * @Description: TODO * @author anyunzhong * @date 2014-5-21 下午1:41:28 * @version V1.0 */ package net.datafans.exercise.rocketmq; /** * @ClassName: Consumer * @Description: TODO * @author anyunzhong * @date 2014-5-21 下午1:41:28 * */ import java.util.List; import com.alibaba.rocketmq.client.consumer.DefaultMQPushConsumer; import com.alibaba.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext; import com.alibaba.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus; import com.alibaba.rocketmq.client.consumer.listener.MessageListenerConcurrently; import com.alibaba.rocketmq.client.exception.MQClientException; import com.alibaba.rocketmq.common.consumer.ConsumeFromWhere; import com.alibaba.rocketmq.common.message.MessageExt; public class Consumer { /** * 当前例子是PushConsumer用法,使用方式给用户感觉是消息从RocketMQ服务器推到了应用客户端。<br> * 但是实际PushConsumer内部是使用长轮询Pull方式从Broker拉消息,然后再回调用户Listener方法<br> */ public static void main(String[] args) throws InterruptedException, MQClientException { /** * 一个应用创建一个Consumer,由应用来维护此对象,可以设置为全局对象或者单例<br> * 注意:ConsumerGroupName需要由应用来保证唯一 */ DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("ConsumerGroupName"); consumer.setNamesrvAddr("112.124.28.196:9876"); /** * 订阅指定topic下tags分别等于TagA或TagC或TagD */ consumer.subscribe("TopicTest1", "TagA || TagC || TagD"); /** * 订阅指定topic下所有消息<br> * 注意:一个consumer对象可以订阅多个topic */ consumer.subscribe("TopicTest2", "*"); /** * 设置Consumer第一次启动是从队列头部开始消费还是队列尾部开始消费<br> * 如果非第一次启动,那么按照上次消费的位置继续消费 */ consumer.setConsumeFromWhere(ConsumeFromWhere.CONSUME_FROM_FIRST_OFFSET); consumer.registerMessageListener(new MessageListenerConcurrently() { /** * 默认msgs里只有一条消息,可以通过设置consumeMessageBatchMaxSize参数来批量接收消息 */ @Override public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) { System.out.println(Thread.currentThread().getName() + " Receive New Messages: " + msgs); MessageExt msg = msgs.get(0); System.out.println(new String(msg.getBody())); if (msg.getTopic().equals("TopicTest1")) { // 执行TopicTest1的消费逻辑 if (msg.getTags() != null && msg.getTags().equals("TagA")) { // 执行TagA的消费 } else if (msg.getTags() != null && msg.getTags().equals("TagC")) { // 执行TagC的消费 } else if (msg.getTags() != null && msg.getTags().equals("TagD")) { // 执行TagD的消费 } } else if (msg.getTopic().equals("TopicTest2")) { // 执行TopicTest2的消费逻辑 } return ConsumeConcurrentlyStatus.CONSUME_SUCCESS; } }); /** * Consumer对象在使用之前必须要调用start初始化,初始化一次即可<br> */ consumer.start(); System.out.println("Consumer Started."); } }
Producer.java
/** * @Title: Producer.java * @Package net.datafans.exercise.rocketmq * @Description: TODO * @author anyunzhong * @date 2014-5-21 下午1:38:26 * @version V1.0 */ package net.datafans.exercise.rocketmq; /** * @ClassName: Producer * @Description: TODO * @author anyunzhong * @date 2014-5-21 下午1:38:26 * */ import com.alibaba.rocketmq.client.exception.MQClientException; import com.alibaba.rocketmq.client.producer.DefaultMQProducer; import com.alibaba.rocketmq.client.producer.SendResult; import com.alibaba.rocketmq.common.message.Message; public class Producer { public static void main(String[] args) throws MQClientException, InterruptedException { /** * 一个应用创建一个Producer,由应用来维护此对象,可以设置为全局对象或者单例<br> * 注意:ProducerGroupName需要由应用来保证唯一<br> * ProducerGroup这个概念发送普通的消息时,作用不大,但是发送分布式事务消息时,比较关键, * 因为服务器会回查这个Group下的任意一个Producer */ DefaultMQProducer producer = new DefaultMQProducer("ProducerGroupName"); /** * Producer对象在使用之前必须要调用start初始化,初始化一次即可<br> * 注意:切记不可以在每次发送消息时,都调用start方法 */ producer.setNamesrvAddr("112.124.28.196:9876"); producer.start(); /** * 下面这段代码表明一个Producer对象可以发送多个topic,多个tag的消息。 * 注意:send方法是同步调用,只要不抛异常就标识成功。但是发送成功也可会有多种状态,<br> * 例如消息写入Master成功,但是Slave不成功,这种情况消息属于成功,但是对于个别应用如果对消息可靠性要求极高,<br> * 需要对这种情况做处理。另外,消息可能会存在发送失败的情况,失败重试由应用来处理。 */ try { { Message msg = new Message("TopicTest1",// topic "TagA",// tag "OrderID001",// key ("Hello MetaQ").getBytes());// body SendResult sendResult = producer.send(msg); System.out.println(sendResult); } { Message msg = new Message("TopicTest2",// topic "TagB",// tag "OrderID0034",// key ("Hello MetaQ").getBytes());// body SendResult sendResult = producer.send(msg); System.out.println(sendResult); } { Message msg = new Message("TopicTest3",// topic "TagC",// tag "OrderID061",// key ("Hello MetaQ").getBytes());// body SendResult sendResult = producer.send(msg); System.out.println(sendResult); } } catch (Exception e) { e.printStackTrace(); } /** * 应用退出时,要调用shutdown来清理资源,关闭网络连接,从MetaQ服务器上注销自己 * 注意:我们建议应用在JBOSS、Tomcat等容器的退出钩子里调用shutdown方法 */ producer.shutdown(); } }
参考资料:
http://www.tuicool.com/articles/mEBVneB
https://github.com/alibaba/RocketMQ
时间: 2024-10-13 16:46:34