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Java > Open Source Codes > org > apache > webapp > admin > resources > DeleteEnvEntriesAction


1 /*
2  * Copyright 2002,2004 The Apache Software Foundation.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16
17
18 package org.apache.webapp.admin.resources;
19
20
21 import java.io.IOException JavaDoc;
22 import java.util.ArrayList JavaDoc;
23 import java.util.Iterator JavaDoc;
24 import java.util.Locale JavaDoc;
25 import javax.servlet.ServletException JavaDoc;
26 import javax.servlet.http.HttpServletRequest JavaDoc;
27 import javax.servlet.http.HttpServletResponse JavaDoc;
28 import javax.servlet.http.HttpSession JavaDoc;
29 import org.apache.struts.action.Action;
30 import org.apache.struts.action.ActionErrors;
31 import org.apache.struts.action.ActionForm;
32 import org.apache.struts.action.ActionForward;
33 import org.apache.struts.action.ActionMapping;
34 import javax.management.Attribute JavaDoc;
35 import javax.management.MBeanServer JavaDoc;
36 import javax.management.MBeanServerFactory JavaDoc;
37 import javax.management.QueryExp JavaDoc;
38 import javax.management.Query JavaDoc;
39 import javax.management.ObjectInstance JavaDoc;
40 import javax.management.ObjectName JavaDoc;
41 import javax.management.JMException JavaDoc;
42 import javax.management.MBeanAttributeInfo JavaDoc;
43 import javax.management.MBeanOperationInfo JavaDoc;
44 import javax.management.MBeanInfo JavaDoc;
45 import org.apache.struts.util.MessageResources;
46 import org.apache.webapp.admin.ApplicationServlet;
47
48
49 /**
50  * <p>Implementation of <strong>Action</strong> that deletes the
51  * specified set of env entries.</p>
52  *
53  * @author Manveen Kaur
54  * @version $Revision: 1.8 $ $Date: 2004/10/18 06:37:54 $
55  * @since 4.1
56  */
57
58 public final class DeleteEnvEntriesAction extends Action {
59
60
61     // ----------------------------------------------------- Instance Variables
62
63
64     /**
65      * The MBeanServer we will be interacting with.
66      */
67     private MBeanServer JavaDoc mserver = null;
68
69
70     // --------------------------------------------------------- Public Methods
71
72
73     /**
74      * Process the specified HTTP request, and create the corresponding HTTP
75      * response (or forward to another web component that will create it).
76      * Return an <code>ActionForward</code> instance describing where and how
77      * control should be forwarded, or <code>null</code> if the response has
78      * already been completed.
79      *
80      * @param mapping The ActionMapping used to select this instance
81      * @param actionForm The optional ActionForm bean for this request (if any)
82      * @param request The HTTP request we are processing
83      * @param response The HTTP response we are creating
84      *
85      * @exception IOException if an input/output error occurs
86      * @exception ServletException if a servlet exception occurs
87      */
88     public ActionForward execute(ActionMapping mapping,
89                                  ActionForm form,
90                                  HttpServletRequest JavaDoc request,
91                                  HttpServletResponse JavaDoc response)
92         throws IOException JavaDoc, ServletException JavaDoc {
93
94         // Look up the components we will be using as needed
95 if (mserver == null) {
96             mserver = ((ApplicationServlet) getServlet()).getServer();
97         }
98         MessageResources resources = getResources(request);
99         HttpSession JavaDoc session = request.getSession();
100         Locale JavaDoc locale = getLocale(request);
101         
102         // Has this transaction been cancelled?
103 if (isCancelled(request)) {
104             return (mapping.findForward("List EnvEntries Setup"));
105         }
106
107         // Check the transaction token
108 if (!isTokenValid(request)) {
109             response.sendError
110                 (HttpServletResponse.SC_BAD_REQUEST,
111                  resources.getMessage(locale, "users.error.token"));
112             return (null);
113         }
114
115         // Perform any extra validation that is required
116 EnvEntriesForm envEntriesForm = (EnvEntriesForm) form;
117         String JavaDoc envEntries[] = envEntriesForm.getEnvEntries();
118         String JavaDoc resourcetype = envEntriesForm.getResourcetype();
119         String JavaDoc path = envEntriesForm.getPath();
120         String JavaDoc host = envEntriesForm.getHost();
121         
122         if (envEntries == null) {
123             envEntries = new String JavaDoc[0];
124         }
125
126         // Perform "Delete EnvEntry" transactions as required
127 try {
128             ObjectName JavaDoc dname = null;
129             
130             String JavaDoc signature[] = new String JavaDoc[1];
131             signature[0] = "java.lang.String";
132             Object JavaDoc params[] = new String JavaDoc[1];
133
134             for (int i = 0; i < envEntries.length; i++) {
135                 ObjectName JavaDoc oname = new ObjectName JavaDoc(envEntries[i]);
136                 String JavaDoc domain = oname.getDomain();
137                 dname = ResourceUtils.getNamingResourceObjectName(domain,
138                             resourcetype, path, host);
139                 params[0] = oname.getKeyProperty("name");
140                 mserver.invoke(dname, "removeEnvironment",
141                                params, signature);
142             }
143             
144         } catch (Throwable JavaDoc t) {
145
146             getServlet().log
147                 (resources.getMessage(locale, "users.error.invoke",
148                                       "removeEnvironment"), t);
149             response.sendError
150                 (HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
151                  resources.getMessage(locale, "users.error.invoke",
152                                       "removeEnvironment"));
153             return (null);
154
155         }
156
157         // Proceed to the list envEntrys screen
158 return (mapping.findForward("EnvEntries List Setup"));
159
160     }
161
162 }
163
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