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You acknowledge that Software is not designed, licensed or intended for use in the design, construction, operation or maintenance of any nuclear facility. $Id: AirlinePOEndpointBean.java,v 1.6 2003/11/25 19:26:03 vijaysr Exp $ */package com.sun.j2ee.blueprints.airlinesupplier.powebservice;import javax.ejb.*;import java.rmi.*;import javax.naming.*;import javax.jms.*;import com.sun.j2ee.blueprints.airlinesupplier.JNDINames;import com.sun.j2ee.blueprints.servicelocator.*;import com.sun.j2ee.blueprints.servicelocator.ejb.*;/** *  This class is the entry point for purchase orders submitted  *  by OPC to the airline suppliers; */public class AirlinePOEndpointBean implements SessionBean {    private SessionContext sc;     public AirlinePOEndpointBean(){}        public void ejbCreate() throws CreateException {}    /**     * Receive an order, preprocess the request, submit request to workflow     * and return the order id so that the caller can have a correlation id     * for the order     */    public String submitAirlineReservationDetails(String xmlPO)  throws InvalidOrderException, OrderSubmissionException,    RemoteException {  // Do Interaction layer processing  AirlineOrder flightObj = preProcessInput(xmlPO);  // Submit request to JMS Queue  submitRequest(flightObj);  // Return Co-relation ID - dummy ID for now  return("FLIGHT1234");    }    private AirlineOrder preProcessInput(String po)  throws InvalidOrderException {  // XML doc should be ideally validated against its schema here;  // Similar scenario shown in OPC module;  // Here it is skipped in this sample - we will convert doc to obj  return(AirlineOrder.fromXML(po));    }    private void submitRequest(AirlineOrder flight)                              throws OrderSubmissionException {  QueueConnectionFactory queueConnectionFactory = null;  Queue queue = null;  QueueConnection queueConnection = null;  QueueSession queueSession = null;  QueueSender queueSender = null;  try {      ServiceLocator sl = new ServiceLocator();            queueConnectionFactory = (QueueConnectionFactory)    sl.getQueueConnectionFactory(JNDINames.AIRLINE_QUEUECONNECTIONFACTORY);            queue = sl.getQueue(JNDINames.AIRLINE_QUEUE);            queueConnection = queueConnectionFactory.createQueueConnection();            queueSession = queueConnection.createQueueSession(true,          Session.AUTO_ACKNOWLEDGE);            queueSender = queueSession.createSender(queue);            ObjectMessage message = queueSession.createObjectMessage();            message.setObject(flight);            queueSender.send(message);  } catch (ServiceLocatorException se) {      throw new OrderSubmissionException("Error while sending a message:"            + se.getMessage());  } catch (JMSException e) {        throw new OrderSubmissionException("Error while sending a message:"                                                + e.getMessage());  } finally {            // close all JMS resources            if (queueSender != null) {    try {                    queueSender.close();    } catch (JMSException e) {                    throw new OrderSubmissionException("Error sender close");    }            }            if (queueSession != null) {    try {                    queueSession.close();    } catch (JMSException e) {                    throw new OrderSubmissionException("Error session close");    }            }            if (queueConnection != null) {    try {                    queueConnection.close();    } catch (JMSException e) {        throw new OrderSubmissionException("Error Connection close");    }            }  }    }            public void setSessionContext(SessionContext sc) {        this.sc = sc;    }        public void ejbRemove() throws RemoteException {}        //empty for Stateless EJBs    public void ejbActivate() {}    //empty for Stateless EJBs    public void ejbPassivate() {}}