java远程连接调用Rabbitmq的实例代码

  • Z时代
  • 2024-01-10
  • 分类：IT

本文介绍了java远程连接调用Rabbitmq，分享给大家，希望此文章对各位有所帮助。

打开IDEA创建一个maven工程（Java就可以了）。

pom.xml文件如下

<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.zhenqi</groupId>
 <artifactId>rabbitmq-study</artifactId>
 <version>1.0-SNAPSHOT</version>
 <packaging>jar</packaging>
 <name>rabbitmq-study</name>
 <url>http://maven.apache.org</url>
 <properties>
  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 </properties>
 <dependencies>
  <dependency>
   <groupId>junit</groupId>
   <artifactId>junit</artifactId>
   <version>4.12</version>
   <scope>test</scope>
  </dependency>
  <!-- https://mvnrepository.com/artifact/com.rabbitmq/amqp-client -->
  <dependency>
   <groupId>com.rabbitmq</groupId>
   <artifactId>amqp-client</artifactId>
   <version>4.1.0</version>
   <exclusions>
    <exclusion>
     <groupId>org.slf4j</groupId>
     <artifactId>slf4j-api</artifactId>
    </exclusion>
   </exclusions>
  </dependency>
  <dependency>
   <groupId>org.slf4j</groupId>
   <artifactId>slf4j-log4j12</artifactId>
   <version>1.7.21</version>
  </dependency>
  <dependency>
   <groupId>commons-lang</groupId>
   <artifactId>commons-lang</artifactId>
   <version>2.6</version>
  </dependency>
 </dependencies>
</project>

为了能远程访问rabbitmq，则需要编辑 /etc/rabbitmq/rabbitmq.conf,添加以下内容。

[
  {rabbit, [{tcp_listeners, [5672]}, {loopback_users, ["asdf"]}]}
 ]

添加administrator角色

rabbitmqctl set_user_tags openstack administrator

创建抽象队列 EndPoint.java

package com.zhenqi;
import com.rabbitmq.client.Channel;
import com.rabbitmq.client.Connection;
import com.rabbitmq.client.ConnectionFactory;
/**
 * Created by wuming on 2017/7/16.
 */
public abstract class EndPoint {
  protected Channel channel;
  protected Connection connection;
  protected String endPointName;
  public EndPoint(String endpointName) throws Exception {
    this.endPointName = endpointName;
    //创建一个连接工厂 connection factory
    ConnectionFactory factory = new ConnectionFactory();
    //设置rabbitmq-server服务IP地址
    factory.setHost("192.168.146.128");
    factory.setUsername("openstack");
    factory.setPassword("rabbitmq");
    factory.setPort(5672);
    factory.setVirtualHost("/");
    //得到 连接
    connection = factory.newConnection();
    //创建 channel实例
    channel = connection.createChannel();
    channel.queueDeclare(endpointName, false, false, false, null);
  }
  /**
   * 关闭channel和connection。并非必须，因为隐含是自动调用的。
   * @throws IOException
   */
  public void close() throws Exception{
    this.channel.close();
    this.connection.close();
  }
}

生产者Producer.java

生产者类的任务是向队列里写一条消息

package com.zhenqi;
import org.apache.commons.lang.SerializationUtils;
import java.io.Serializable;
/**
 * Created by wuming on 2017/7/16.
 */
public class Producer extends EndPoint {
  public Producer(String endpointName) throws Exception {
    super(endpointName);
  }
  public void sendMessage(Serializable object) throws Exception {
    channel.basicPublish("",endPointName, null, SerializationUtils.serialize(object));
  }
}

消费者QueueConsumer.java

消费者可以以线程方式运行，对于不同的事件有不同的回调函数，其中最主要的是处理新消息到来的事件。

package com.zhenqi;
import com.rabbitmq.client.AMQP;
import com.rabbitmq.client.Consumer;
import com.rabbitmq.client.Envelope;
import com.rabbitmq.client.ShutdownSignalException;
import org.apache.commons.lang.SerializationUtils;
import org.apache.log4j.Logger;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
/**
 * Created by wuming on 2017/7/16.
 */
public class QueueConsumer extends EndPoint implements Runnable, Consumer {
  private Logger LOG=Logger.getLogger(QueueConsumer.class);
  public QueueConsumer(String endpointName) throws Exception {
    super(endpointName);
  }
  public void handleConsumeOk(String s) {
  }
  public void handleCancelOk(String s) {
  }
  public void handleCancel(String s) throws IOException {
  }
  public void handleShutdownSignal(String s, ShutdownSignalException e) {
  }
  public void handleRecoverOk(String s) {
    LOG.info("Consumer "+s +" registered");
  }
  public void handleDelivery(String s, Envelope envelope, AMQP.BasicProperties basicProperties, byte[] bytes) throws IOException {
    Map map = (HashMap) SerializationUtils.deserialize(bytes);
    LOG.info("Message Number "+ map.get("message number") + " received.");
  }
  public void run() {
    try{
      channel.basicConsume(endPointName, true,this);
    }catch(IOException e){
      e.printStackTrace();
    }
  }
}

 测试

运行一个消费者线程，然后开始产生大量的消息，这些消息会被消费者取走

package com.zhenqi;
import java.util.HashMap;
/**
 * Created by wuming on 2017/7/16.
 */
public class TestRabbitmq {
  public static void main(String[] args){
    try{
      QueueConsumer consumer = new QueueConsumer("queue");
      Thread consumerThread = new Thread(consumer);
      consumerThread.start();
      Producer producer = new Producer("queue");
      for (int i = 0; i < 100000; i++){
        HashMap message = new HashMap();
        message.put("message number", i);
        producer.sendMessage(message);
        System.out.println("Message Number "+ i +" sent.");
      }
    }catch(Exception e){
      e.printStackTrace();
    }
  }
}

以上是 java远程连接调用Rabbitmq的实例代码 的全部内容， 来源链接： utcz.com/p/213842.html

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