ActiveMQ例子_2

最新推荐文章于 2024-11-28 16:10:16 发布

未来，值得期待

最新推荐文章于 2024-11-28 16:10:16 发布

阅读量1.7k

点赞数 1

CC 4.0 BY-SA版权

分类专栏： javaEE框架文章标签： ActiveMQ

本文链接：https://blog.youkuaiyun.com/adam_wzs/article/details/51250177

javaEE框架专栏收录该内容

9 篇文章

订阅专栏

本文介绍了一种基于ActiveMQ的消息传递机制实现方式，通过具体的Java代码示例展示了如何配置消息生产者和消费者，并实现了消息的发送与接收。该机制允许消息消费者通过监听的方式接收消息，同时提供了测试代码验证其正确性。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

消费者接受消息的方法：

1.第一种方法使用consumer.receive() 或 consumer.receive(int timeout)接受消息，消息的接收者会一直等待下去，直到有消息到达，或者超时。

2.第二种方法：消息消费者注册一个MessageListener，当有消息到达的时候，会回调它的onMessage()方法。

第一种方法见：http://blog.youkuaiyun.com/adam_wzs/article/details/51145800

第二种方法见下文，如果不会配置ActiveMQ环境请看第一种方法连接。

ConsumerTool.java

package com.wangzs.t3;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

/**
 * @Title 消息消费者工具类
 * @Description 消息消费者是由会话创建的一个对象，它用于接收发送到目的地的消息。
 * @author wangzs
 * @date 2016-4-26
 */
public class ConsumerTool implements MessageListener {

	private String user;
	private String password;
	private String url;
	private String queueName; // queueName是一个服务器的queue

	private ConnectionFactory connectionFactory = null; // 连接工厂,客户用来创建连接的对象
	private Destination destination = null; // 指定它生产的消息的目标和它消费的消息的来源的对象
	private Connection connection = null; // 封装了客户与 JMS 提供者之间的一个虚拟的连接
	private Session session = null; // 生产和消费消息的一个单线程上下文
	private MessageConsumer consumer = null; // 消息消费者

	public ConsumerTool() {
		super();
	}

	public ConsumerTool(String user, String password, String url, String queueName) {
		super();
		this.user = user;
		this.password = password;
		this.url = url;
		this.queueName = queueName;
	}

	public void initialize() {
		connectionFactory = new ActiveMQConnectionFactory(this.getUser(), this.getPassword(), this.getUrl());
		try {
			connection = connectionFactory.createConnection();
			connection.start();
			session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE);
			destination = session.createQueue(this.getQueueName());
			consumer = session.createConsumer(destination);
		} catch (JMSException e) {
			e.printStackTrace();
		}

	}

	// 消费消息
	public void consumeMessage() {
		System.out.println("Consumer:->Begin listening...");
		try {
			consumer.setMessageListener(this);
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}

	@Override
	public void onMessage(Message message) {
		try {
			if (message instanceof TextMessage) {
				TextMessage txtMsg = (TextMessage) message;
				String msg = txtMsg.getText();
				System.out.println("Consumer:->Received: " + msg);
			}
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}

	// 关闭连接
	public void close() {
		try {
			System.out.println("Consumer:->Closing connection");
			if (consumer != null) {
				consumer.close();
			}
			if (session != null) {
				session.close();
			}
			if (connection != null) {
				connection.close();
			}
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}

	public String getUser() {
		return user;
	}

	public void setUser(String user) {
		this.user = user;
	}

	public String getPassword() {
		return password;
	}

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

	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}

	public String getQueueName() {
		return queueName;
	}

	public void setQueueName(String queueName) {
		this.queueName = queueName;
	}

}

ProducerTool.java

package com.wangzs.t3;

import javax.jms.Connection;
import javax.jms.ConnectionFactory;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

/**
 * @Title 消息生产者工具类
 * @Description 消息生产者是由会话创建的一个对象，用于把消息发送到一个目的地
 * @author wangzs
 * @date 2016-4-26
 */
public class ProducerTool {

	private String user;
	private String password;
	private String url;
	private String queueName; // queueName是一个服务器的queue

	private ConnectionFactory connectionFactory = null; // 连接工厂,客户用来创建连接的对象
	private Destination destination = null; // 指定它生产的消息的目标和它消费的消息的来源的对象
	private Connection connection = null; // 封装了客户与 JMS 提供者之间的一个虚拟的连接
	private Session session = null; // 生产和消费消息的一个单线程上下文
	private MessageProducer producer = null; // 消息生产者

	public ProducerTool() {
		super();
	}

	public ProducerTool(String user, String password, String url, String queueName) {
		super();
		this.user = user;
		this.password = password;
		this.url = url;
		this.queueName = queueName;
	}

	public void initialize() {
		connectionFactory = new ActiveMQConnectionFactory(this.getUser(), this.getPassword(), this.getUrl());
		try {
			connection = connectionFactory.createConnection();
			connection.start();
			session = connection.createSession(Boolean.FALSE, Session.AUTO_ACKNOWLEDGE);
			destination = session.createQueue(this.getQueueName());
			producer = session.createProducer(destination);
			producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);// NON_PERSISTENT:不要求 JMS Producer 持久保存消息。
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}

	// 发送消息
	public void produceMessage(String message) {
		try {
			TextMessage msg = session.createTextMessage(message);
			System.out.println("Producer:->Sending message: " + message);
			producer.send(msg);
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}

	// 关闭连接
	public void close() {
		try {
			System.out.println("Producer:->Closing connection");
			if (producer != null) {
				producer.close();
			}
			if (session != null) {
				session.close();
			}
			if (connection != null) {
				connection.close();
			}
		} catch (JMSException e) {
			e.printStackTrace();
		}
	}

	public String getUser() {
		return user;
	}

	public void setUser(String user) {
		this.user = user;
	}

	public String getPassword() {
		return password;
	}

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

	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}

	public String getQueueName() {
		return queueName;
	}

	public void setQueueName(String queueName) {
		this.queueName = queueName;
	}

}

JunitTest.java

package com.wangzs.t3;

import org.apache.activemq.ActiveMQConnection;
import org.junit.Test;

/**
 * @Title ActiveMQ工具类测试
 * @Description
 * @author wangzs
 * @date 2016-4-26
 */
public class JunitTest {

	@Test
	public void test1() throws InterruptedException {
		ConsumerTool consumer = new ConsumerTool(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD,
				ActiveMQConnection.DEFAULT_BROKER_URL, "WangzsQueue");
		ProducerTool producer = new ProducerTool(ActiveMQConnection.DEFAULT_USER, ActiveMQConnection.DEFAULT_PASSWORD,
				ActiveMQConnection.DEFAULT_BROKER_URL, "WangzsQueue");
		System.out.println(ActiveMQConnection.DEFAULT_BROKER_URL + "------------");

		// 消费者
		consumer.initialize();
		consumer.consumeMessage();

		// 生产者
		producer.initialize();
		for (int i = 0; i < 10; i++) {
			Thread.sleep(500);
			producer.produceMessage("Hello, world!  " + i);
		}
	}
}

测试结果：

failover://tcp://localhost:61616------------
2016-04-26 14:28:20 DEBUG FailoverTransport:660 - Reconnect was triggered but transport is not started yet. Wait for start to connect the transport.
 2016-04-26 14:28:20 DEBUG FailoverTransport:302 - Started.
 2016-04-26 14:28:20 DEBUG FailoverTransport:653 - Waking up reconnect task
 2016-04-26 14:28:20 DEBUG FailoverTransport:683 - urlList connectionList:[tcp://localhost:61616], from: [tcp://localhost:61616]
 2016-04-26 14:28:20 DEBUG FailoverTransport:855 - Attempting connect to: tcp://localhost:61616
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:82 - Sending: WireFormatInfo { version=7, properties={CacheSize=1024, CacheEnabled=true, SizePrefixDisabled=false, MaxInactivityDurationInitalDelay=10000, TcpNoDelayEnabled=true, MaxInactivityDuration=30000, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
 2016-04-26 14:28:20 DEBUG InactivityMonitor:331 - Using min of local: WireFormatInfo { version=7, properties={CacheSize=1024, CacheEnabled=true, SizePrefixDisabled=false, MaxInactivityDurationInitalDelay=10000, TcpNoDelayEnabled=true, MaxInactivityDuration=30000, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]} and remote: WireFormatInfo { version=7, properties={CacheSize=1024, SizePrefixDisabled=false, TcpNoDelayEnabled=true, MaxInactivityDurationInitalDelay=10000, MaxInactivityDuration=30000, CacheEnabled=true, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:118 - Received WireFormat: WireFormatInfo { version=7, properties={CacheSize=1024, SizePrefixDisabled=false, TcpNoDelayEnabled=true, MaxInactivityDurationInitalDelay=10000, MaxInactivityDuration=30000, CacheEnabled=true, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:125 - tcp://localhost/127.0.0.1:61616 before negotiation: OpenWireFormat{version=7, cacheEnabled=false, stackTraceEnabled=false, tightEncodingEnabled=false, sizePrefixDisabled=false}
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:140 - tcp://localhost/127.0.0.1:61616 after negotiation: OpenWireFormat{version=7, cacheEnabled=true, stackTraceEnabled=true, tightEncodingEnabled=true, sizePrefixDisabled=false}
 2016-04-26 14:28:20 DEBUG FailoverTransport:865 - Connection established
 2016-04-26 14:28:20  INFO FailoverTransport:891 - Successfully connected to tcp://localhost:61616
 Consumer:->Begin listening...
2016-04-26 14:28:20 DEBUG FailoverTransport:660 - Reconnect was triggered but transport is not started yet. Wait for start to connect the transport.
 2016-04-26 14:28:20 DEBUG FailoverTransport:302 - Started.
 2016-04-26 14:28:20 DEBUG FailoverTransport:653 - Waking up reconnect task
 2016-04-26 14:28:20 DEBUG FailoverTransport:683 - urlList connectionList:[tcp://localhost:61616], from: [tcp://localhost:61616]
 2016-04-26 14:28:20 DEBUG FailoverTransport:855 - Attempting connect to: tcp://localhost:61616
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:82 - Sending: WireFormatInfo { version=7, properties={CacheSize=1024, CacheEnabled=true, SizePrefixDisabled=false, MaxInactivityDurationInitalDelay=10000, TcpNoDelayEnabled=true, MaxInactivityDuration=30000, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
 2016-04-26 14:28:20 DEBUG InactivityMonitor:331 - Using min of local: WireFormatInfo { version=7, properties={CacheSize=1024, CacheEnabled=true, SizePrefixDisabled=false, MaxInactivityDurationInitalDelay=10000, TcpNoDelayEnabled=true, MaxInactivityDuration=30000, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]} and remote: WireFormatInfo { version=7, properties={CacheSize=1024, SizePrefixDisabled=false, TcpNoDelayEnabled=true, MaxInactivityDurationInitalDelay=10000, MaxInactivityDuration=30000, CacheEnabled=true, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:118 - Received WireFormat: WireFormatInfo { version=7, properties={CacheSize=1024, SizePrefixDisabled=false, TcpNoDelayEnabled=true, MaxInactivityDurationInitalDelay=10000, MaxInactivityDuration=30000, CacheEnabled=true, TightEncodingEnabled=true, StackTraceEnabled=true}, magic=[A,c,t,i,v,e,M,Q]}
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:125 - tcp://localhost/127.0.0.1:61616 before negotiation: OpenWireFormat{version=7, cacheEnabled=false, stackTraceEnabled=false, tightEncodingEnabled=false, sizePrefixDisabled=false}
 2016-04-26 14:28:20 DEBUG WireFormatNegotiator:140 - tcp://localhost/127.0.0.1:61616 after negotiation: OpenWireFormat{version=7, cacheEnabled=true, stackTraceEnabled=true, tightEncodingEnabled=true, sizePrefixDisabled=false}
 2016-04-26 14:28:20 DEBUG FailoverTransport:865 - Connection established
 2016-04-26 14:28:20  INFO FailoverTransport:891 - Successfully connected to tcp://localhost:61616
 Producer:->Sending message: Hello, world!  0
Consumer:->Received: Hello, world!  0
Producer:->Sending message: Hello, world!  1
Consumer:->Received: Hello, world!  1
Producer:->Sending message: Hello, world!  2
Consumer:->Received: Hello, world!  2
Producer:->Sending message: Hello, world!  3
Consumer:->Received: Hello, world!  3
Producer:->Sending message: Hello, world!  4
Consumer:->Received: Hello, world!  4
Producer:->Sending message: Hello, world!  5
Consumer:->Received: Hello, world!  5
Producer:->Sending message: Hello, world!  6
Consumer:->Received: Hello, world!  6
Producer:->Sending message: Hello, world!  7
Consumer:->Received: Hello, world!  7
Producer:->Sending message: Hello, world!  8
Consumer:->Received: Hello, world!  8
Producer:->Sending message: Hello, world!  9
Consumer:->Received: Hello, world!  9