ShoppingWebController.java |
/* * Copyright 2002 Sun Microsystems, Inc. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * - Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * - Redistribution in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * Neither the name of Sun Microsystems, Inc. or the names of * contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * This software is provided "AS IS," without a warranty of any * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY * EXCLUDED. SUN AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR * DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN * OR ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR * FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR * PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF * LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE SOFTWARE, * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. * * You acknowledge that Software is not designed, licensed or intended * for use in the design, construction, operation or maintenance of * any nuclear facility. */ package com.sun.j2ee.blueprints.petstore.controller.web; import java.util.Collection; // J2EE imports import javax.servlet.http.HttpSession; import javax.servlet.ServletContext; import javax.ejb.RemoveException; //waf imports import com.sun.j2ee.blueprints.util.tracer.Debug; import com.sun.j2ee.blueprints.petstore.util.PetstoreKeys; import com.sun.j2ee.blueprints.waf.event.Event; import com.sun.j2ee.blueprints.waf.event.EventResponse; import com.sun.j2ee.blueprints.waf.controller.web.WebController; import com.sun.j2ee.blueprints.petstore.controller.ejb.ShoppingControllerLocal; import com.sun.j2ee.blueprints.waf.exceptions.GeneralFailureException; import com.sun.j2ee.blueprints.waf.event.EventException; import com.sun.j2ee.blueprints.cart.model.CartItem; /** * This class is essentially just a proxy object that calls methods on the * EJB tier using the com.sun.j2ee.blueprints.waf.controller.ejb.ShoppingClientControllerEJB * object. All the methods that access the EJB are synchronized so * that concurrent requests do not happen to the stateful session bean. * */ public class ShoppingWebController implements WebController { public ShoppingWebController() { } /** * constructor for an HTTP client. * @param the HttpSession object for a client */ public void init(HttpSession session) { ; } /** * feeds the specified event to the state machine of the business logic. * * @param ev is the current event * @param session is the current user session * @return an com.sun.j2ee.blueprints.waf.event.EventResponse that resulted from the * processing of this event. * @exception com.sun.j2ee.blueprints.waf.event.EventException <description> * @exception com.sun.j2ee.blueprints.waf.exceptions.GeneralFailureException */ public synchronized EventResponse handleEvent(Event ev, HttpSession session) throws EventException { PetstoreComponentManager pcm = (PetstoreComponentManager)session.getAttribute(PetstoreKeys.COMPONENT_MANAGER); ShoppingControllerLocal scEjb = pcm.getShoppingController(session); return scEjb.processEvent(ev); } /** * frees up all the resources associated with this controller and * destroys itself. */ public synchronized void destroy(HttpSession session) { // call ejb remove PetstoreComponentManager pcm = (PetstoreComponentManager)session.getAttribute(PetstoreKeys.COMPONENT_MANAGER); ShoppingControllerLocal scEjb = pcm.getShoppingController(session); try { scEjb.remove(); } catch(RemoveException re){ // ignore, after all its only a remove() call! Debug.print(re); } } }
ShoppingWebController.java |