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


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 user databases.</p>
52  *
53  * @author Manveen Kaur
54  * @version $Revision: 1.5 $ $Date: 2004/10/18 06:37:54 $
55  * @since 4.1
56  */
57
58 public final class DeleteUserDatabasesAction 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 UserDatabases 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 UserDatabasesForm userDatabasesForm = (UserDatabasesForm) form;
117         String JavaDoc userDatabases[] = userDatabasesForm.getUserDatabases();
118         if (userDatabases == null) {
119             userDatabases = new String JavaDoc[0];
120         }
121
122         // Perform "Delete User Database" transactions as required
123 try {
124
125             String JavaDoc signature[] = new String JavaDoc[1];
126             signature[0] = "java.lang.String";
127             Object JavaDoc params[] = new String JavaDoc[1];
128
129             for (int i = 0; i < userDatabases.length; i++) {
130                 ObjectName JavaDoc oname = new ObjectName JavaDoc(userDatabases[i]);
131                 // Construct the MBean Name for the naming source
132 ObjectName JavaDoc dname = new ObjectName JavaDoc(oname.getDomain() +
133                                     ResourceUtils.NAMINGRESOURCES_TYPE +
134                                     ResourceUtils.GLOBAL_TYPE);
135                 params[0] = oname.getKeyProperty("name");
136                 mserver.invoke(dname, "removeResource",
137                                params, signature);
138             }
139
140         } catch (Throwable JavaDoc t) {
141
142             getServlet().log
143                 (resources.getMessage(locale, "users.error.invoke",
144                                       "removeResource"), t);
145             response.sendError
146                 (HttpServletResponse.SC_INTERNAL_SERVER_ERROR,
147                  resources.getMessage(locale, "users.error.invoke",
148                                       "removeResource"));
149             return (null);
150
151         }
152
153         // Proceed to the list envEntrys screen
154 return (mapping.findForward("UserDatabases List Setup"));
155
156     }
157
158 }
159
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