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Java > Open Source Codes > org > ofbiz > webapp > event > SimpleEventHandler


1 /*
2  * $Id: SimpleEventHandler.java 5462 2005-08-05 18:35:48Z jonesde $
3  *
4  * Copyright (c) 2001-2003 The Open For Business Project - www.ofbiz.org
5  *
6  * Permission is hereby granted, free of charge, to any person obtaining a
7  * copy of this software and associated documentation files (the "Software"),
8  * to deal in the Software without restriction, including without limitation
9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10  * and/or sell copies of the Software, and to permit persons to whom the
11  * Software is furnished to do so, subject to the following conditions:
12  *
13  * The above copyright notice and this permission notice shall be included
14  * in all copies or substantial portions of the Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
18  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
19  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
20  * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
21  * OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
22  * THE USE OR OTHER DEALINGS IN THE SOFTWARE.
23  *
24  */
25 package org.ofbiz.webapp.event;
26
27 import java.util.Locale JavaDoc;
28 import javax.servlet.http.HttpServletRequest JavaDoc;
29 import javax.servlet.http.HttpServletResponse JavaDoc;
30 import javax.servlet.ServletContext JavaDoc;
31
32 import org.ofbiz.base.util.Debug;
33 import org.ofbiz.base.util.UtilHttp;
34 import org.ofbiz.base.util.UtilProperties;
35 import org.ofbiz.minilang.MiniLangException;
36 import org.ofbiz.minilang.SimpleMethod;
37
38 /**
39  * SimpleEventHandler - Simple Event Mini-Lang Handler
40  *
41  * @author <a HREF="mailto:jonesde@ofbiz.org">David E. Jones</a>
42  * @author <a HREF="mailto:jaz@ofbiz.org">Andy Zeneski</a>
43  * @version $Rev: 5462 $
44  * @since 2.0
45  */
46 public class SimpleEventHandler implements EventHandler {
47
48     public static final String JavaDoc module = SimpleEventHandler.class.getName();
49     /** Contains the property file name for translation of error messages. */
50     public static final String JavaDoc err_resource = "WebappUiLabels";
51
52     /**
53      * @see org.ofbiz.webapp.event.EventHandler#init(javax.servlet.ServletContext)
54      */
55     public void init(ServletContext JavaDoc context) throws EventHandlerException {
56     }
57     
58     /**
59      * Invoke the web event
60      *@param eventPath The path or location of this event
61      *@param eventMethod The method to invoke
62      *@param request The servlet request object
63      *@param response The servlet response object
64      *@return String Result code
65      *@throws EventHandlerException
66      */
67     public String JavaDoc invoke(String JavaDoc eventPath, String JavaDoc eventMethod, HttpServletRequest JavaDoc request, HttpServletResponse JavaDoc response) throws EventHandlerException {
68         String JavaDoc xmlResource = eventPath;
69         String JavaDoc eventName = eventMethod;
70         Locale JavaDoc locale = UtilHttp.getLocale(request);
71         
72         if (Debug.verboseOn()) Debug.logVerbose("[Set path/method]: " + xmlResource + " / " + eventName, module);
73
74         if (xmlResource == null) {
75             throw new EventHandlerException("XML Resource (eventPath) cannot be null");
76         }
77         if (eventName == null) {
78             throw new EventHandlerException("Event Name (eventMethod) cannot be null");
79         }
80
81         Debug.logVerbose("[Processing]: SIMPLE Event", module);
82         try {
83             String JavaDoc eventReturn = SimpleMethod.runSimpleEvent(xmlResource, eventName, request, response);
84             if (Debug.verboseOn()) Debug.logVerbose("[Event Return]: " + eventReturn, module);
85             return eventReturn;
86         } catch (MiniLangException e) {
87             Debug.logError(e, module);
88             String JavaDoc errMsg = UtilProperties.getMessage(SimpleEventHandler.err_resource, "simpleEventHandler.event_not_completed", (locale != null ? locale : Locale.getDefault())) + ": ";
89             request.setAttribute("_ERROR_MESSAGE_", errMsg + e.getMessage());
90             return "error";
91         }
92     }
93 }
94
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