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package dk.thoerup.messagedriven; |
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import java.io.IOException; |
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import java.util.Random; |
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import javax.annotation.Resource; |
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import javax.jms.Message; |
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import javax.jms.MessageListener; |
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import javax.jms.MessageProducer; |
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import javax.jms.Queue; |
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import javax.jms.QueueConnection; |
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import javax.jms.QueueConnectionFactory; |
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import javax.jms.QueueReceiver; |
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import javax.jms.QueueSession; |
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import javax.jms.Session; |
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import javax.jms.TextMessage; |
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import javax.servlet.ServletException; |
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import javax.servlet.annotation.WebServlet; |
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import javax.servlet.http.HttpServlet; |
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import javax.servlet.http.HttpServletRequest; |
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import javax.servlet.http.HttpServletResponse; |
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@WebServlet(name = "ReverserServlet", urlPatterns = { "/ReverserServlet" }) |
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public class ReverserServlet extends HttpServlet { |
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private static final long serialVersionUID = 1L; |
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// resource mapped vars may of course not be static ! |
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@Resource(mappedName = "jms/helloFactory") |
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private QueueConnectionFactory connectionFactory; |
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@Resource(mappedName = "jms/reverse") |
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private Queue queue; |
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@Resource(mappedName = "jms/reverseResponse") |
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private Queue responseQueue; |
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protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { |
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String msg = request.getParameter("msg"); |
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if (msg == null) |
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msg = "Default"; |
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Random r = new Random(); |
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try { |
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QueueConnection connection = connectionFactory.createQueueConnection(); |
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QueueSession session = connection.createQueueSession(false, QueueSession.AUTO_ACKNOWLEDGE); |
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MessageProducer producer = session.createProducer(queue); |
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TextMessage message = session.createTextMessage(); |
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String corrID = "" + r.nextInt(); |
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message.setText(msg); |
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message.setJMSReplyTo(responseQueue); |
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message.setJMSCorrelationID(corrID); |
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producer.send(message); |
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//Remember ' around the correleationID in JMS selector |
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QueueReceiver consumer = session.createReceiver(responseQueue,"JMSCorrelationID='" + corrID + "'"); |
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connection.start(); //incomming messages is not received until a start is given |
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TextMessage reply = (TextMessage) consumer.receive(500); //wait max 500 ms for replay |
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if (reply != null) |
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response.getWriter().print("Reply: " + reply.getText() ); |
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else |
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response.getWriter().print("No reply !!!"); |
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connection.close(); |
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} catch (Exception e) { |
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throw new ServletException(e); |
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} |
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} |
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class Test implements MessageListener { |
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@Override |
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public void onMessage(Message message) { |
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// TODO Auto-generated method stub |
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System.out.println("onMessage() "); |
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} |
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} |
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} |