java消息队列ActiveMQ之Comsumer

最新推荐文章于 2024-10-12 16:38:57 发布

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本文介绍了如何在Java中配置并使用ActiveMQ消息队列创建消费者，包括添加依赖库和进行测试的步骤。

1、需要添加在上一篇博客中说到的依赖jar包
2、创建创建消费者

package com.activemq.demo;

import java.util.concurrent.atomic.AtomicInteger;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.JMSException;
import javax.jms.MessageConsumer;
import javax.jms.Queue;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class Comsumer {

    private static final String USERNAME = ActiveMQConnection.DEFAULT_USER;

    private static final String PASSWORD = ActiveMQConnection.DEFAULT_PASSWORD;

    private static final String BROKEN_URL = "tcp://192.168.0.0:61616";

    ConnectionFactory connectionFactory;

    Connection connection;

    Session session;

    ThreadLocal<MessageConsumer> threadLocal = new ThreadLocal<>();
    AtomicInteger count = new AtomicInteger();

    public void init() {
        try {
            connectionFactory = new ActiveMQConnectionFactory(USERNAME,
                    PASSWORD, BROKEN_URL);
            connection = connectionFactory.createConnection();
            connection.start();
            session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
        } catch (JMSException e) {
            e.printStackTrace();
        }
    }

    public void getMessage(String disname) {
        try {
            Queue queue = session.createQueue(disname);
            MessageConsumer consumer = null;

            if (threadLocal.get() != null) {
                consumer = threadLocal.get();
            } else {
                consumer = session.createConsumer(queue);
                threadLocal.set(consumer);
            }
            while (true) {
                Thread.sleep(1000);
                TextMessage msg = (TextMessage) consumer.receive();
                if (msg != null) {
                    msg.acknowledge();
                    System.out.println("接收到消息：" + msg.getText() + " ||  "
                            + count.getAndIncrement());
                } else {
                    break;
                }
            }
        } catch (JMSException e) {
            e.printStackTrace();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

3、测试

package com.activemq.demo;

public class TestGetMsg {

    public static void main(String[] args) {
        Comsumer comsumer = new Comsumer();
        comsumer.init();
        TestGetMsg testGetMsg = new TestGetMsg();
        try {
            Thread.sleep(3000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }


        new Thread(testGetMsg.new ProductorMq(comsumer)).start();
    }

    private class ProductorMq implements Runnable {
        Comsumer comsumer;

        public ProductorMq(Comsumer comsumer) {
            this.comsumer = comsumer;
        }

        @Override
        public void run() {
            while (true) {
                    comsumer.getMessage("LGZ-MQ");
//              try {
//                  Thread.sleep(500);
//              } catch (InterruptedException e) {
//                  e.printStackTrace();
//              }
            }
        }
    }
}