006_Topic消息模式发送对象消息

1. 新建一个名为JMSActiveMQObjectMessage的Java项目, 同时拷入相关jar包

2. 编辑User.java

package com.jms.activemq.tom;

import java.io.Serializable;

public class User implements Serializable {
	private static final long serialVersionUID = 1L;
	
	private String userName;
    private String password;
    
    public User() {
	}

	public User(String userName, String password) {
		this.userName = userName;
		this.password = password;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	@Override
	public String toString() {
		return "User [userName=" + userName + ", password=" + password + "]";
	}
    
}

3. 编辑TopicObjectMessageProducer.java

package com.jms.activemq.tom;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class TopicObjectMessageProducer {
	// 默认连接用户名
	private static final String dftUsr = ActiveMQConnection.DEFAULT_USER;
	// 默认用户密码
	private static final String dftPwd = ActiveMQConnection.DEFAULT_PASSWORD;
	// 默认连接地址
	private static final String dftUrl = ActiveMQConnection.DEFAULT_BROKER_URL;
	// 队列名称
	private static final String topicName = "topicObjMsg";
	
	public static void main(String[] args) {
		// 1. 创建一个连接工厂
		ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory(dftUsr, dftPwd, dftUrl);
		// 设置所有对所有序列化包都信任
		cf.setTrustAllPackages(true);
		// 连接对象
		Connection conn = null;
		// 会话对象
		Session session = null;
		
		try {
			// 2. 创建连接
			conn = cf.createConnection();
			// 3. 启动连接
			conn.start();
			// 4. 创建会话
			session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
			// 5. 创建消息目的地。如果是点对点, 那么它的实现是Queue; 如果是订阅模式, 那它的实现是Topic。这里我们创建一个名为topicObjMsg的主题。
			Destination destination = session.createTopic(topicName);
			// 6. 消息生产者
			MessageProducer producer = session.createProducer(destination);
			// 7. 创建文本消息和发送消息
			ObjectMessage message = session.createObjectMessage();
			message.setObject(new User("zhangsan", "123456"));
			producer.send(message);
			System.out.println("发送: " + message.getObject());
		} catch (JMSException e) {
			e.printStackTrace();
		} finally {
			try {
				if (session != null) {
					session.close();
				}
			} catch (JMSException e1) {
				e1.printStackTrace();
			} finally {
				if (conn != null) {
					try {
						conn.close();
					} catch (JMSException e) {
						e.printStackTrace();
					}
				}
			}
		}
	}
}

4. 编辑TopicObjectMessageConsumer.java

package com.jms.activemq.tom;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.ObjectMessage;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class TopicObjectMessageConsumer {
	// 默认连接用户名
	private static final String dftUsr = ActiveMQConnection.DEFAULT_USER;
	// 默认用户密码
	private static final String dftPwd = ActiveMQConnection.DEFAULT_PASSWORD;
	// 默认连接地址
	private static final String dftUrl = ActiveMQConnection.DEFAULT_BROKER_URL;
	// 队列名称
	private static final String topicName = "topicObjMsg";
		
	public static void main(String[] args) {
		// 1. 创建一个连接工厂
		ActiveMQConnectionFactory cf = new ActiveMQConnectionFactory(dftUsr, dftPwd, dftUrl);
		// 设置所有对所有序列化包都信任
		cf.setTrustAllPackages(true);
		// 连接对象
		Connection conn = null;
		// 会话对象
		Session session = null;
		
		try {
			// 2. 创建连接
			conn = cf.createConnection();
			// 3. 创建会话
			session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
			// 4. 创建消息目的地。如果是点对点, 那么它的实现是Queue; 如果是订阅模式, 那它的实现是Topic。这里我们创建一个名为topicObjMsg的主题。
			Destination destination = session.createTopic(topicName);
			// 5. 消息消费者
			MessageConsumer consumer = session.createConsumer(destination);
			// 6. 接收消息
			consumer.setMessageListener(new MessageListener() {
				@Override
				public void onMessage(Message msg) {
					try {
						User user = (User) ((ObjectMessage) msg).getObject();
						System.out.println("接收: " + user);
					} catch (JMSException e) {
						e.printStackTrace();
					}
				}
			});
			// 7. 启动连接, 准备开始接收消息
			conn.start();
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}
}

5. 运行TopicObjectMessageConsumer.java, 等待接收消息

6. 运行TopicObjectMessageProducer.java

7. TopicObjectMessageConsumer.java接收到消息, 并且继续等待接收消息, 直到退出应用程序。

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