ActiveMQ之Topic

发送消息

package com.nova.jms.topic;

import javax.jms.DeliveryMode;
import javax.jms.MapMessage;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicPublisher;
import javax.jms.TopicSession;

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

/**
 * 方式消息发送者
 * 
 * @version 1.0
 */
public class TopicSender {

    // 发送次数
    public static final int SEND_NUM = 5;
    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标，在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String DESTINATION = "fee.topic";

    public static void sendMessage(TopicSession session,
            TopicPublisher publisher) throws Exception {
        for (int i = 0; i < SEND_NUM; i++) {
            String message = "发送消息第" + (i + 1) + "条";

            MapMessage map = session.createMapMessage();
            map.setString("text", message);
            map.setLong("time", System.currentTimeMillis());
            System.out.println(map);

            publisher.send(map);
        }
    }

    public static void run() throws Exception {

        TopicConnection connection = null;
        TopicSession session = null;
        try {
            // 创建链接工厂
            TopicConnectionFactory factory = new ActiveMQConnectionFactory(
                    ActiveMQConnection.DEFAULT_USER,
                    ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createTopicConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createTopicSession(Boolean.TRUE,
                    Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Topic topic = session.createTopic(DESTINATION);
            // 创建消息发送者
            TopicPublisher publisher = session.createPublisher(topic);
            // 设置持久化模式
            publisher.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
            sendMessage(session, publisher);
            // 提交会话
            session.commit();

        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }

    public static void main(String[] args) throws Exception {
        TopicSender.run();
    }
}

接收消息

package com.nova.jms.topic;

import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.Topic;
import javax.jms.TopicConnection;
import javax.jms.TopicConnectionFactory;
import javax.jms.TopicSession;
import javax.jms.TopicSubscriber;

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

public class TopicReceiver {

    // tcp 地址
    public static final String BROKER_URL = "tcp://localhost:61616";
    // 目标，在ActiveMQ管理员控制台创建 http://localhost:8161/admin/queues.jsp
    public static final String TARGET = "fee.topic";

    public static void run() throws Exception {

        TopicConnection connection = null;
        TopicSession session = null;
        try {
            // 创建链接工厂
            TopicConnectionFactory factory = new ActiveMQConnectionFactory(
                    ActiveMQConnection.DEFAULT_USER,
                    ActiveMQConnection.DEFAULT_PASSWORD, BROKER_URL);
            // 通过工厂创建一个连接
            connection = factory.createTopicConnection();
            // 启动连接
            connection.start();
            // 创建一个session会话
            session = connection.createTopicSession(Boolean.TRUE,
                    Session.AUTO_ACKNOWLEDGE);
            // 创建一个消息队列
            Topic topic = session.createTopic(TARGET);
            // 创建消息制作者
            TopicSubscriber subscriber = session.createSubscriber(topic);

            subscriber.setMessageListener(new MessageListener() {
                public void onMessage(Message msg) {
                    if (msg != null) {
                        MapMessage map = (MapMessage) msg;
                        try {
                            System.out.println(map.getLong("time") + "接收#"
                                    + map.getString("text"));
                        } catch (JMSException e) {
                            e.printStackTrace();
                        }
                    }
                }
            });
            // 休眠100ms再关闭
            Thread.sleep(1000 * 100);

            // 提交会话
            session.commit();

        } catch (Exception e) {
            throw e;
        } finally {
            // 关闭释放资源
            if (session != null) {
                session.close();
            }
            if (connection != null) {
                connection.close();
            }
        }
    }

    public static void main(String[] args) throws Exception {
        TopicReceiver.run();
    }
}