008_Queue消息模式发送映射消息

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

2. 编辑QueueMapMessageProducer.java

package com.jms.activemq.qmm;

import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueSender;
import javax.jms.QueueSession;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class QueueMapMessageProducer {
	// 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 queueName = "queueMapMsg";
	
	public static void main(String[] args) {
		// 1. 创建一个连接工厂
		QueueConnectionFactory cf = new ActiveMQConnectionFactory(dftUsr, dftPwd, dftUrl);
		// 连接对象
		QueueConnection conn = null;
		// 会话对象
		QueueSession session = null;
		
		try {
			// 2. 创建连接
			conn = cf.createQueueConnection();
			// 3. 启动连接
			conn.start();
			// 4. 创建会话
			session = conn.createQueueSession(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queueMapMsg的消息队列。
			Queue queue = session.createQueue(queueName);
			// 6. 消息生产者
			QueueSender sender = session.createSender(null);
			// 7. 创建文本消息和发送消息
			for(int i = 0; i < 2; i++) {
				MapMessage message = session.createMapMessage();
				message.setLong("id", 100000000000L + i);
				message.setString("name", "lisi");
				sender.send(queue, message);
				
				try {
					Thread.sleep(1000);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
			}
		} 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();
					}
				}
			}
		}
	}
}

3. 编辑QueueMapMessageConsumer.java

package com.jms.activemq.qmm;

import javax.jms.JMSException;
import javax.jms.MapMessage;
import javax.jms.Queue;
import javax.jms.QueueConnection;
import javax.jms.QueueConnectionFactory;
import javax.jms.QueueReceiver;
import javax.jms.QueueSession;
import javax.jms.Session;
import org.apache.activemq.ActiveMQConnection;
import org.apache.activemq.ActiveMQConnectionFactory;

public class QueueMapMessageConsumer {
	// 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 queueName = "queueMapMsg";
		
	public static void main(String[] args) {
		// 1. 创建一个连接工厂
		QueueConnectionFactory cf = new ActiveMQConnectionFactory(dftUsr, dftPwd, dftUrl);
		// 连接对象
		QueueConnection conn = null;
		// 会话对象
		QueueSession session = null;
		
		try {
			// 2. 创建连接
			conn = cf.createQueueConnection();
			// 3. 创建会话
			session = conn.createQueueSession(false, Session.CLIENT_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queueMapMsg的消息队列。
			Queue queue = session.createQueue(queueName);
			// 5. 消息消费者
			QueueReceiver receiver = session.createReceiver(queue);
			// 6. 启动连接, 准备开始接收消息
			conn.start();
			// 7. 接收消息
			MapMessage message = (MapMessage) receiver.receive(1000 * 3);
			System.out.println("接收: id = " + message.getLong("id") + ", name = " + message.getString("name"));
			MapMessage message1 = (MapMessage) receiver.receive(1000 * 3);
			System.out.println("接收: id = " + message1.getLong("id") + ", name = " + message1.getString("name"));
			
			// 8. 客户端主动确认消息已成功接收。进行了一次确认, 却确认了2条消息的消费, 因为这种确认方式是会话级别的。
			message.acknowledge(); 
			
			System.out.println("JMSDestination = " + message.getJMSDestination() + ", JMSDeliveryMode = " + message.getJMSDeliveryMode()
			 + ", JMSExpiration = " + message.getJMSExpiration() + ", JMSPriority = " + message.getJMSPriority()
			 + ",\r\nJMSMessageID = " + message.getJMSMessageID() + ", JMSTimestamp = " + message.getJMSTimestamp()
			 + ", JMSCorrelationID = " + message.getJMSCorrelationID() + ",\r\nJMSReplyTo = " + message.getJMSReplyTo()
			 + ", JMSType = " + message.getJMSType() + ", JMSRedelivered = " + message.getJMSRedelivered());
		} 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. 运行QueueMapMessageProducer.java

5. 注释掉确认消息代码, 运行QueueMapMessageConsumer.java

6. 放开确认消息代码, 再次运行QueueMapMessageConsumer.java