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RocketMQ使用

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>
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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.");    }}
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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();    }}
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参考资料:

http://www.tuicool.com/articles/mEBVneB

https://github.com/alibaba/RocketMQ

RocketMQ使用