JavaEE(4) - JMS实现企业PTP消息处理

1. 在Weblogic服务器上配置PTP消息目的

配置持久化：

Services-->Persistence Stores-->New(Create FileStore, Create JDBCStore) (Name: crazyit)

配置JMS服务器：

Services-->Messaging-->JMS Servers-->New(Name: crazyitServer; Directory: D:\domains\base_domain\crazyit)

配置JMS模块：

Services-->Messaging-->JMS Modules-->New(Name: CrazyitModule)

为JMS模块配置子部署：

Services-->Messaging-->JMS Modules--><Module Name>-->Subdeployments-->New(Name: my-sub)

向JMS模块添加资源：

Services-->Messaging-->JMS Modules--><Module Name>-->Configuration-->New-->Queue(Name: MessageQueue)

2. 编写PTP消息的生产者

NetBeans创建java project(JmsPTP) (MessageSender.java)

需要wlclient.jar, webservices.jar, wljmsclient.jar

package lee;

import java.util.Properties;
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 javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;

public class MessageSender {
    public void sendMessage() throws NamingException, JMSException
    {
        //定义WebLogic默认连接工厂的JNDI
        final String CONNECTION_FACTORY_JNDI = "weblogic.jms.ConnectionFactory";
        
        //获取JNDI服务所需的Context
        Context ctx = getInitialContext();
        
        ConnectionFactory connFactory = (ConnectionFactory)ctx.lookup(CONNECTION_FACTORY_JNDI);
        Destination dest = (Destination)ctx.lookup("MessageQueue");
        Connection conn = connFactory.createConnection();
        Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
        
        MessageProducer sender = session.createProducer(dest);
        sender.setDeliveryMode(DeliveryMode.PERSISTENT);
        sender.setTimeToLive(20000);
        
        TextMessage msg = session.createTextMessage();
        
        msg.setText("Hello");
        sender.send(msg);
        
        msg.setText("Welcome to JMS");
        sender.send(msg);
        
        session.close();
        conn.close();
    }

    private Context getInitialContext() {      
        final String INIT_FACTORY = "weblogic.jndi.WLInitialContextFactory";
        final String SERVER_URL = "t3://localhost:7001";
        Context ctx = null;
        try
        {
            Properties props = new Properties();
            props.put(Context.INITIAL_CONTEXT_FACTORY, INIT_FACTORY);
            props.put(Context.PROVIDER_URL , SERVER_URL);
            
            ctx = new InitialContext(props);
        }
        catch(NamingException e)
        {
            System.err.println("不能连接WebLogic Server在:" + SERVER_URL);
            e.printStackTrace();
        }
        return ctx;
    }
    
    public static void main(String[] args) throws Exception
    {
        MessageSender sender = new MessageSender();
        sender.sendMessage();
    }
}

3. 编写PTP消息的同步接收者(SyncConsumer.java)

package lee;

import javax.jms.*;
import javax.naming.*;
import java.util.Properties;

public class SyncConsumer {
    public void receiveMessage() throws JMSException, NamingException {
        //定义WebLogic默认连接工厂的JNDI
        final String CONNECTION_FACTORY_JNDI = "weblogic.jms.ConnectionFactory";
        
        //获取JNDI服务所需的Context
        Context ctx = getInitialContext();

        ConnectionFactory connFactory = (ConnectionFactory) ctx.lookup(CONNECTION_FACTORY_JNDI);    
        Destination dest = (Destination) ctx.lookup("MessageQueue");

        Connection conn = connFactory.createConnection();
        conn.start();

        Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageConsumer receiver = session.createConsumer(dest);

        TextMessage msg = (TextMessage) receiver.receive();
        System.out.println(msg);
        System.out.println("同步接收到的消息：" + msg.getText());

        session.close();
        conn.close();
    }

    //工具方法，用来获取命名服务的Context对象
    private Context getInitialContext() {
        // 参看(4)
    }

    public static void main(String[] args) throws Exception {
        SyncConsumer consumer = new SyncConsumer();
        consumer.receiveMessage();
    }
}

4. 编写PTP消息的异步接收者(AsyncConsumer.java)

package lee;

import javax.jms.*;
import javax.naming.*;
import java.util.Properties;

//JMS异步消费者就是一个监听器，故实现MessageListener接口
public class AsyncConsumer implements MessageListener {
    public AsyncConsumer() throws NamingException, JMSException, InterruptedException {
        final String CONNECTION_FACTORY_JNDI = "weblogic.jms.ConnectionFactory";

        Context ctx = getInitialContext();

        ConnectionFactory connFactory = (ConnectionFactory) ctx.lookup(CONNECTION_FACTORY_JNDI);
        Destination dest = (Destination) ctx.lookup("MessageQueue");
        Connection conn = connFactory.createConnection();

        conn.start();
    
        Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
        MessageConsumer receiver = session.createConsumer(dest);

        receiver.setMessageListener(this);
        Thread.sleep(20000);

        session.close();
        conn.close();
    }

    //实现消息监听器必须实现的方法。
    public void onMessage(Message m) {
        TextMessage msg = (TextMessage) m;
        System.out.println(msg);
        try {
            System.out.println("异步接收的消息：" + msg.getText());
        } 
        catch (JMSException ex) {
            ex.printStackTrace();
        }
    }

    //工具方法，用来获取命名服务的Context对象
    private Context getInitialContext() {
        // 参看(4)
    }

    public static void main(String[] args) throws Exception {
        AsyncConsumer consumer = new AsyncConsumer();
    }
}