apache ActiveMQ之初体验
一. 开篇语
继上一篇weblogic中使用jms发送和接受消息的文章后, 本文使用apache的一个开源组件ActiveMQ接着探讨JMS的话题, 本篇仅仅是ActiveMQ的一个入门的样例, 希望对您有所帮助.
二. ActiveMQ
1. ActiveMQ简单介绍:
ActiveMQ是Apache的一个能力强劲的开源消息总线, 它全然支持JMS1.1和JavaEE1.4规范的JMS Provider实现.
2. ActiveMQ特性:
1.) 多种语言和协议编写client。语言: Java, C, C++, C#, Ruby, Perl, Python, PHP。
应用协议: OpenWire,Stomp REST,WS Notification,XMPP,AMQP
2.) 全然支持JMS1.1和J2EE 1.4规范 (持久化,XA消息,事务)
3.) 对Spring的支持,ActiveMQ能够非常easy内嵌到使用Spring的系统里面去,并且也支持Spring2.0的特性
4.) 通过了常见J2EE服务器(如 Geronimo,JBoss 4, GlassFish,WebLogic)的測试,当中通过JCA 1.5 resourceadaptors的配置,
能够让ActiveMQ能够自己主动的部署到不论什么兼容J2EE1.4商业服务器上
5.) 支持多种传送协议:in-VM,TCP,SSL,NIO,UDP,JGroups,JXTA
6.) 支持通过JDBC和journal提供快速的消息持久化
7.) 从设计上保证了高性能的集群,client-服务器,点对点
8.) 支持Ajax
9.) 支持与Axis的整合
10.) 能够非常easy得调用内嵌JMS provider,进行測试
3. 环境准备:
1.) 下载ActiveMQ:
http://activemq.apache.org/download.html, 我下载的是apache-activemq-5.2.0
2.) 执行ActiveMQ server
解压缩下载好的文件, 双击bin/activemq.bat 启动server, ActiveMQ内置了jetty服务器, 默认使用TCP连接port为61616.
ActiveMQ提供一个用于监控ActiveMQ的admin应用: http://127.0.0.1:8161/admin
3.) 在Eclipse中建立Javaproject, 并导入activemq-all-5.2.0.jar包
4.) 新建两个Java类: 消息生产者MsgSender和消息消费者MsgReceiver
4. 代码測试(P2P):
1.) 消息生产者: MsgSender
/**
* Message Provider
*/
public class MsgSender {
// ConnectionFactory: use to create JMS connection
private static ConnectionFactory connectionFactory;
// Connection: connect message provider and JMS server
private static Connection connection;
// Session: a message send or receive thread
private static Session session;
// Destination: use to sign the message type
private static Destination destination;
// MessageProducer：sender
private static MessageProducer messageProducer;
/**
* init the JMS object
*/
public static void init() throws Exception {
// use ActiveMQ to to create connection factory.
connectionFactory = new ActiveMQConnectionFactory(
ActiveMQConnection.DEFAULT_USER,
ActiveMQConnection.DEFAULT_PASSWORD,
"tcp://localhost:61616");
// get the connection from connection factory
connection = connectionFactory.createConnection();
session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue("myQueue");
messageProducer = session.createProducer(destination);
messageProducer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
connection.start();
}
/**
* send activeMq message
*/
public static void sendMessage() throws Exception {
for (int i = 1; i <= 5; i++) {
TextMessage message = session.createTextMessage("ActiveMq message " + i);
System.out.println("send：" + "ActiveMq message " + i);
messageProducer.send(message);
}
session.commit();
}
/**
* release resource
*/
public static void release() throws Exception {
messageProducer.close();
session.close();
connection.close();
}
/**
* main method
*/
public static void main(String[] args) throws Exception {
init();
sendMessage();
release();
}
}2.) 消息消费者: MsgReceiver
/**
* Message Consumer
*/
public class MsgReceiver {
// ConnectionFactory: use to create JMS connection
private static ConnectionFactory connectionFactory;
// Connection: connect message provider and JMS server
private static Connection connection;
// Session: a message send or receive thread
private static Session session;
// use to sign the message type
private static Destination destination;
// MessageConsumer: receiver
private static MessageConsumer messageConsumer;
/**
* init the JMS object
*/
public static void init() throws Exception {
// use ActiveMQ to to create connection factory.
connectionFactory = new ActiveMQConnectionFactory(
ActiveMQConnection.DEFAULT_USER,
ActiveMQConnection.DEFAULT_PASSWORD,
"tcp://localhost:61616");
// get the connection from connection factory
connection = connectionFactory.createConnection();
session = connection.createSession(true, Session.AUTO_ACKNOWLEDGE);
destination = session.createQueue("myQueue");
messageConsumer = session.createConsumer(destination);
connection.start();
}
/**
* receive activeMq message
*/
public static void receiveMessage() throws Exception {
while (true) {
TextMessage message = (TextMessage) messageConsumer.receive();
if (message != null) {
System.out.println("receive: " + message.getText());
} else {
break;
}
}
}
/**
* release resource
*/
public static void release() throws Exception {
messageConsumer.close();
session.close();
connection.close();
}
/**
* main method
*/
public static void main(String[] args) throws Exception {
init();
receiveMessage();
release();
}
}3.) 源代码下载地址: http://download.csdn.net/detail/zdp072/7422401
