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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: ActivityPOEndpointBean.java,v 1.7 2003/11/25 19:15:21 vijaysr Exp $ */package com.sun.j2ee.blueprints.activitysupplier.powebservice;import javax.ejb.*;import java.rmi.*;import javax.jms.*;import java.util.*;import com.sun.j2ee.blueprints.activitysupplier.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 activity suppliers; */public class ActivityPOEndpointBean implements SessionBean {    private SessionContext sc;     public ActivityPOEndpointBean(){}        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 submitActivityReservationDetails(String xmlPO)         throws InvalidOrderException, OrderSubmissionException,                                                   RemoteException {  // Do Interaction layer processing  ActivityOrder order = preProcessInput(xmlPO);  // Submit request thro JMS Queue  submitRequest(order);  // Return reference id - dummy ID for now  return("ACT1234");    }    private ActivityOrder preProcessInput(String po)                        throws InvalidOrderException {  // XML doc should be ideally validated against its schema here;  // Similar scenario already shown in OPC module;  // Here it is skipped in this sample - we will convert doc to obj  return(ActivityOrder.fromXML(po));    }    private void submitRequest(ActivityOrder act)                        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.ACT_QUEUECONNECTIONFACTORY);      queue = sl.getQueue(JNDINames.ACT_QUEUE);      queueConnection = queueConnectionFactory.createQueueConnection();      queueSession = queueConnection.createQueueSession(true,        Session.AUTO_ACKNOWLEDGE);      queueSender = queueSession.createSender(queue);      ObjectMessage message = queueSession.createObjectMessage();      message.setObject(act);      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() {}}