java-RocketMQ

RocketMQ的前身是Metaq,当 Metaq 3.0发布时,产品名称改为 RocketMQ
MetaQ2.x版本由于依赖了alibaba公司内部其他系统,对于公司外部用户使用不够友好,推荐使用3.0版本。 项目地址: https://github.com/alibaba/RocketMQ

安装

安装RocketMQ需要jdk1.6, maven,git环境
如果本机没有安装git,请使用如下命令安装

    yum install git

     具体安装步骤可以参考 RocketMQ 项目组给出的步骤,参见:

     https://github.com/alibaba/RocketMQ/wiki/Quick-Start
git clone https://github.com/alibaba/RocketMQ.git

cd RocketMQ

sh install.sh

cd devenv

安装完成后,因为install.sh脚本中创建devenv 符号链接写错了目录,需要在RocketMQ目录下执行如下命令:

  rm -rf devenv

  ln -s target/alibaba-rocketmq-3.0.7/alibaba-rocketmq devenv

  启动RocketMQ

  cd devenv/bin

  nohup sh mqnamesrv &

  nohup sh mqbroker -n "192.168.230.128:9876" &

  more nohup.out
  如果显示:

  The Name Server boot success. 
  The broker[vdata.kt, 192.168.230.128:10911] boot success. 则NameServer,Broker启动成功

测试

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>com.catt</groupId>
  <artifactId>RocketMQTest</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>

  <name>RocketMQTest</name>
  <url>http://maven.apache.org</url>

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
  </properties>

  <dependencies>
    <dependency>
      <groupId>com.alibaba.rocketmq</groupId>
      <artifactId>rocketmq-client</artifactId>
      <version>3.0.7</version>
    </dependency>
    <dependency>
      <groupId>com.alibaba.rocketmq</groupId>
      <artifactId>rocketmq-all</artifactId>
      <version>3.0.7</version>
      <type>pom</type>
    </dependency>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-classic</artifactId>
      <version>1.1.1</version>
    </dependency>
    <dependency>
      <groupId>ch.qos.logback</groupId>
      <artifactId>logback-core</artifactId>
      <version>1.1.1</version>
    </dependency>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>4.10</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>
import java.util.concurrent.TimeUnit;

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.setNamesrvAddr("192.168.230.128:9876");
    producer.setInstanceName("Producer");

    /** * 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.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。 */
    for (int i = 0; i < 100; i++) {
      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();
      }
      TimeUnit.MILLISECONDS.sleep(1000);
    }

    /** * 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();
  }
}
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.message.MessageExt;

public class PushConsumer {

  /** * 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MetaQ服务器拉消息,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("192.168.230.128:9876");
    consumer.setInstanceName("Consumber");

    /** * 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", "*");

    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.size());

        MessageExt msg = msgs.get(0);
        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
            System.out.println(new String(msg.getBody()));
          } 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")) {
          System.out.println(new String(msg.getBody()));
        }

        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.");
  }
}

默认情况下,一台服务器只能启动一个Producer或Consumer实例,所以如果需要在一台服务器启动多个实例,需要设置实例的名称

producer.setNamesrvAddr(“192.168.230.128:9876”);
producer.setInstanceName(“Producer”);

你可能感兴趣的:(java-RocketMQ)