从头到尾讲解EJB MDB（消息驱动bean）四——示例代码

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yunlielai 2012-10-27 10:57:34

文章标签 客户端 文章分类 前端开发

、Queue：

客户端：

[java] view plain copy

public class MyMDBBeanClient {
public static void main(String[] args) throws Exception {
InitialContext ict = new InitialContext();
//获取connectionFactory对象
QueueConnectionFactory factory = (QueueConnectionFactory)ict.lookup("ConnectionFactory");
//获取Connection对象
QueueConnection connection = factory.createQueueConnection();
//获取Session对象，第一个参数表示事务自动提交，第二个参数表示一旦消息被正确发送，将自动发回响应
QueueSession session = connection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
//获取destination对象
Queue queue = (Queue)ict.lookup("queue/myqueue");
//设置消息
TextMessage msg = session.createTextMessage("hello world ");
//获取sender对象
QueueSender sender = session.createSender(queue);
//发送消息
sender.send(msg);
session.close();
System.out.println("消息已经发送！");
}
}

MDB：

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public class MyMDBBeanClient {
public static void main(String[] args) throws Exception {
InitialContext ict = new InitialContext();
//获取connectionFactory对象
QueueConnectionFactory factory = (QueueConnectionFactory)ict.lookup("ConnectionFactory");
//获取Connection对象
QueueConnection connection = factory.createQueueConnection();
//获取Session对象，第一个参数表示事务自动提交，第二个参数表示一旦消息被正确发送，将自动发回响应
QueueSession session = connection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE);
//获取destination对象
Queue queue = (Queue)ict.lookup("queue/myqueue");
//设置消息
TextMessage msg = session.createTextMessage("hello world ");
//获取sender对象
QueueSender sender = session.createSender(queue);
//发送消息
sender.send(msg);
session.close();
System.out.println("消息已经发送！");
}
}

2.Topic

客户端：

[java] view plain copy

public class MyTopicMDBBeanClient {
public static void main(String[] args) throws Exception {
InitialContext ict = new InitialContext();
//获取connectionFactory对象
TopicConnectionFactory factory = (TopicConnectionFactory)ict.lookup("ConnectionFactory");
//获取Connection对象
TopicConnection connection = factory.createTopicConnection();
//获取Session对象，第一个参数表示事务自动提交，第二个参数表示一旦消息被正确发送，将自动发回响应
TopicSession session = connection.createTopicSession(false, TopicSession.AUTO_ACKNOWLEDGE);
//获取destination对象
Topic topic = (Topic)ict.lookup("topic/mytopic");
//设置消息
TextMessage msg = session.createTextMessage("hello world ");
//获取sender对象
TopicPublisher publisher = session.createPublisher(topic);
//发送消息
publisher.publish(msg);
session.close();
System.out.println("消息已经发送！");
}
}

MDB1：

[java] view plain copy

@MessageDriven (
activationConfig = {
@ActivationConfigProperty(propertyName="destinationType",propertyValue="javax.jms.Topic"),
@ActivationConfigProperty(propertyName="destination",propertyValue="topic/mytopic")
}
)
public class MyTopicMDBBean1 implements MessageListener {
public void onMessage(Message msg) {
TextMessage message = (TextMessage)msg;
try {
System.out.println("MyTopicMDBBean1调用了："+ message.getText());
} catch (JMSException e) {
e.printStackTrace();
}
}
}

MDB2：

[java] view plain copy

@MessageDriven (
activationConfig = {
@ActivationConfigProperty(propertyName="destinationType",propertyValue="javax.jms.Topic"),
@ActivationConfigProperty(propertyName="destination",propertyValue="topic/mytopic")
}
)
public class MyTopicMDBBean2 implements MessageListener {
public void onMessage(Message msg) {
TextMessage message = (TextMessage)msg;
try {
System.out.println("MyTopicMDBBean2调用了："+ message.getText());
} catch (JMSException e) {
e.printStackTrace();
}
}
}