rocketmq学习

官网地址

安装name server和broker

git clone https://github.com/apache/incubator-rocketmq.git

cd incubator-rocketmq

mvn clean package install -Prelease-all assembly:assembly -U

然后target目录下的apache-rocketmq-all就是我们需要的

把apache-rocketmq-all抽出来，移到apache-rocketmq-all目录下

执行nohup sh bin/mqnamesrv & 启动name server

tail -f ~/logs/rocketmqlogs/namesrv.log 查看name server日志

执行nohup sh bin/mqbroker -n localhost:9876 & 启动Broker

tail -f ~/logs/rocketmqlogs/broker.log 查看Broker日志

demo

添加依赖

<!--rocketmq-->
<dependency>
  <groupId>org.apache.rocketmq</groupId>
  <artifactId>rocketmq-client</artifactId>
  <version>4.0.0-incubating</version>
</dependency>

消费者

/**
 * @author fengzp
 * @date 2017/3/31下午5:10
 * @email fengzp@gzyitop.com
 * @company 广州易站通计算机科技有限公司
 */
public class ConsumerMQ {

    public static void main(String[] args) throws MQClientException, InterruptedException {

        /**
         * ConsumerGroupName需要由应用来保证唯一
         */
        DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("GroupName");

        /**
         * 指定服务端和端口
         */
        consumer.setNamesrvAddr("localhost:9876");

        /**
         * 订阅指定topic下tags为TagName的消息; "TagA || TagB || TagC" 代表订阅TagA和TagB和TagC的消息; "*" 代表订阅所有消息
         */
        consumer.subscribe("TopicName", "TagName");


        /**
         * 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
         * 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);

        /**
         * * 默认msgs里只有一条消息，可以通过consumer.setConsumeMessageBatchMaxSize();来设置批量接收消息
         */
        consumer.registerMessageListener(new MessageListenerConcurrently() {

            public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> list, ConsumeConcurrentlyContext consumeConcurrentlyContext) {
                for (MessageExt msg : list) {
                    /**
                     * msg.getMsgId(); //msg唯一id
                     * msg.getTopic();
                     * msg.getTags();
                     */
                    System.out.println(new String(msg.getBody()));
                }

                return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
            }
        });
        consumer.start();

        System.out.println("Consumer Started.");
    }
}

提供者

/**
* @author fengzp
* @date 2017/3/31下午5:07
* @email fengzp@gzyitop.com
* @company 广州易站通计算机科技有限公司
*/
public class ProducerMQ {

    public static void main(String[] args) throws MQClientException, InterruptedException {
        DefaultMQProducer producer = new DefaultMQProducer("GroupName");

        producer.setNamesrvAddr("localhost:9876");
        producer.setInstanceName("InstanceName");
        producer.start();

        try {
            for (int i = 0; i < 3; i++) {
                Message msg = new Message("TopicName", "TagName", (new Date() + " fengzp hao shuai a " + i).getBytes());

                SendResult sendResult = producer.send(msg);

                System.out.println(sendResult.getMsgId() + " : " + sendResult.getSendStatus().name());
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

        /**
         * 应用退出时，需要调用shutdown方法来在MetaQ服务器上注销自己
         */
        producer.shutdown();
    }
}