ActiveMQ学习

ActiveMQ学习

标签（空格分隔）： ActiveMQ JMS

ActiveMQ简介

ActiveMQ是JMS消息通信规范的一个实现,通过ActiveMQ消息服务交换消息。消息生产者将消息发送至消息服务，消息消费者则从消息服务接收这些消息。这些消息传送操作是使用一组实现 ActiveMQ应用编程接口 (API) 的对象来执行的。

安装ActiveMQ

a.官网下载安装
http://activemq.apache.org/download-archives.html
b.brew下载安装
执行命令
brew install activemq

启动/关闭ActiveMQ

找到activemq的安装目录，执行bin/activemq start/stop
启动后：
打开http://localhost:8161/admin/，即可访问后台管理界面

生产/消费模式

生产者

package com.frankstar.producer;

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

import javax.jms.*;

/** * Created by frankstar on 16/7/11. */
public class Producer {

    private static final int SENDER_NUMBER = 5;

    public static void main(String[] args) {
        ConnectionFactory  connectionFactory;
        Connection connection = null;
        Session session;
        Destination destination;
        MessageProducer messageProducer;

        connectionFactory = new ActiveMQConnectionFactory(
                ActiveMQConnection.DEFAULT_BROKER_URL);

        try {
            connection = connectionFactory.createConnection();
            connection.start();
            session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
            destination = session.createQueue("Frankstar");
            messageProducer = session.createProducer(destination);
            sendMessage(session, messageProducer);
            session.commit();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (null != connection) {
                    connection.close();
                }
            } catch (Throwable ignore) {

            }

        }
    }

    private static void sendMessage(Session session, MessageProducer messageProducer) throws JMSException {

        for (int i = 0; i < SENDER_NUMBER; i++) {
            TextMessage textMessage = session.createTextMessage("ActiveMQ发送消息:" + i);
            System.out.println("发送消息：" + "ActiveMQ 发送的消息" + i);
            messageProducer.send(textMessage);
        }
    }
}

消费者

package com.frankstar.consumer;

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

import javax.jms.*;

/** * Created by frankstar on 16/7/11. */
public class Consumer {
    public static void main(String[] args) throws JMSException {
        ConnectionFactory connectionFactory;
        Connection connection = null;
        Session session;
        Destination destination;
        MessageConsumer messageConsumer;

        connectionFactory = new ActiveMQConnectionFactory(
                ActiveMQConnection.DEFAULT_BROKER_URL
        );

        try {
            connection = connectionFactory.createConnection();
            connection.start();
            session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
            destination = session.createQueue("Frankstar");
            messageConsumer = session.createConsumer(destination);
            while (true) {
                TextMessage textMessage = (TextMessage) messageConsumer.receive(1000);
                if (textMessage != null) {
                    System.out.println("收到消息:" + textMessage.getText());
                } else {
                    break;
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if (connection != null) {
                    connection.close();
                }
            } catch (Throwable ignore) {

            }
        }
    }
}

测试

运行Producer的主函数，在执行Consumer的主函数，在管理界面Queue中查看信息的订阅与消费