Apache ActiveMQ ----- 相关资料

最新推荐文章于 2025-08-07 22:24:36 发布

转载最新推荐文章于 2025-08-07 22:24:36 发布 · 434 阅读

文章标签：

#activemq #apache #session #exception #string #buffer

本文详细介绍了如何使用ActiveMQ进行异步消息处理和简单文件传输，包括发送和接收消息的Java代码示例，以及实现步骤。

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Apache ActiveMQ 5.5 : http://activemq.apache.org/

1. 使用ActiveMQ异步处理消息: http://www.iteye.com/topic/275045

SendMessage.java

package sample;

import javax.jms.Connection;
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;

public class SendMessage {
	
	private static final String url = "tcp://localhost:61616";
	private static final String QUEUE_NAME = "choice.queue";
	protected String expectedBody = "<hello>world!</hello>";

	public void sendMessage() throws JMSException {
		Connection connection = null;
		try {
			ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(url);
			connection = (Connection) connectionFactory.createConnection();
			connection.start();
			Session session = (Session) connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
			Destination destination = session.createQueue(QUEUE_NAME);
			MessageProducer producer = session.createProducer(destination);
			TextMessage message = session.createTextMessage(expectedBody);
			message.setStringProperty("headname", "remoteB");
			producer.send(message);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	public static void main(String[] args) {
		SendMessage sndMsg = new SendMessage();
		try {
			sndMsg.sendMessage();
		} catch (Exception ex) {
			System.out.println(ex.toString());
		}
	}
}

ReceiveMessage.java

package sample;

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

import org.apache.activemq.ActiveMQConnectionFactory;

public class ReceiveMessage {
	
	private static final String url = "tcp://localhost:61616";
	private static final String QUEUE_NAME = "choice.queue";

	public void receiveMessage() {
		Connection connection = null;
		try {
			try {
				ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory(url);
				connection = connectionFactory.createConnection();
			} catch (Exception e) {
				System.out.println(e.toString());
			}
			connection.start();
			Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
			Destination destination = session.createQueue(QUEUE_NAME);
			MessageConsumer consumer = session.createConsumer(destination);
			consumeMessagesAndClose(connection, session, consumer);
		} catch (Exception e) {
			System.out.println(e.toString());
		}
	}

	protected void consumeMessagesAndClose(Connection connection, Session session, MessageConsumer consumer) throws JMSException {
		for (int i = 0; i < 1;) {
			Message message = consumer.receive(1000);
			if (message != null) {
				i++;
				onMessage(message);
			}
		}
		System.out.println("Closing connection");
		consumer.close();
		session.close();
		connection.close();
	}

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

	}

	public static void main(String args[]) {
		ReceiveMessage rm = new ReceiveMessage();
		rm.receiveMessage();
	}
}

2.实现简单文件传输： http://topmanopensource.iteye.com/blog/1065630

StreamMsgProducer.java

package sample;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.StreamMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

public class StreamMsgProducer {
	
	public void send(File file) {
		
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory();
		Connection conn = null;
		try {
			conn = factory.createConnection();
			conn.start();
			Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
			Destination queue = session.createQueue("streamMsg");
			MessageProducer producer = session.createProducer(queue);

			InputStream in = new FileInputStream(file);
			byte[] buffer = new byte[2048];
			int c = -1;
			while ((c = in.read(buffer)) > 0) {
				StreamMessage smsg = session.createStreamMessage();
				smsg.writeBytes(buffer, 0, c);
				producer.send(smsg);
				System.out.println("send: " + c);
			}
			in.close();
		} catch (JMSException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (conn != null) {
				try {
					conn.close();
				} catch (JMSException e) {
					e.printStackTrace();
				}
			}
		}
	}

	public static void main(String[] args) {
		File file = new File("D:\\send.txt");
		new StreamMsgProducer().send(file);
	}
}

StreamMsgConsumer.java

package sample;

import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;

import javax.jms.Connection;
import javax.jms.Destination;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.Session;
import javax.jms.StreamMessage;

import org.apache.activemq.ActiveMQConnectionFactory;

public class StreamMsgConsumer {

	public void receive() {
		
		ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory();
		Connection conn = null;
		try {
			conn = factory.createConnection();
			conn.start();
			Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
			Destination queue = session.createQueue("streamMsg");
			MessageConsumer consumer = session.createConsumer(queue);
			OutputStream out = new FileOutputStream("D:\\receive.txt");
			byte[] buffer = new byte[2048];
			while (true) {
				Message msg = consumer.receive(5000);
				if (msg == null) {
					break;
				}
				if (msg instanceof StreamMessage) {
					StreamMessage smsg = (StreamMessage) msg;
					int c = smsg.readBytes(buffer);
					out.write(buffer, 0, c);
					System.out.println("Receive: " + c);
				}
			}
			out.close();
		} catch (JMSException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			if (conn != null) {
				try {
					conn.close();
				} catch (JMSException e) {
					e.printStackTrace();
				}
			}
		}
	}

	public static void main(String[] args) {
		new StreamMsgConsumer().receive();
	}
}

其他资料：

http://www.iteye.com/topic/234101

http://topmanopensource.iteye.com/blog/1070096

http://jinguo.iteye.com/blog/240187

http://xiongzhenhui.iteye.com/blog/1172329