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Java > Open Source Codes > org > ejtools > jmx > browser > web > action > NotificationAction


1 /*
2
3  * EJTools, the Enterprise Java Tools
4
5  *
6
7  * Distributable under LGPL license.
8
9  * See terms of license at www.gnu.org.
10
11  */
12
13 package org.ejtools.jmx.browser.web.action;
14
15
16
17 import java.io.IOException;
18
19 import java.io.PrintWriter;
20
21 import java.io.StringWriter;
22
23 import java.util.Enumeration;
24
25 import java.util.Locale;
26
27 import java.util.Vector;
28
29
30
31 import javax.servlet.ServletContext;
32
33 import javax.servlet.ServletException;
34
35 import javax.servlet.http.HttpServletRequest;
36
37 import javax.servlet.http.HttpServletResponse;
38
39
40
41 import org.apache.log4j.Logger;
42
43 import org.apache.struts.action.Action;
44
45 import org.apache.struts.action.ActionError;
46
47 import org.apache.struts.action.ActionErrors;
48
49 import org.apache.struts.action.ActionForm;
50
51 import org.apache.struts.action.ActionForward;
52
53 import org.apache.struts.action.ActionMapping;
54
55 import org.apache.struts.util.MessageResources;
56
57 import org.ejtools.jmx.browser.model.Resource;
58
59 import org.ejtools.jmx.browser.web.Constants;
60
61 import org.ejtools.jmx.browser.web.JMXContainer;
62
63
64
65 /**
66
67  * Description of the Class
68
69  *
70
71  * @author letiemble
72
73  * @created 12 novembre 2001
74
75  * @version $Revision: 1.6 $
76
77  * @todo Javadoc to complete
78
79  * @todo Clear debug statement
80
81  */
82
83 public class NotificationAction extends Action
84
85 {
86
87    /** Description of the Field */
88
89    private static Logger logger = Logger.getLogger(NotificationAction.class);
90
91
92
93
94
95    /** Constructor for the SearchLoginAction object */
96
97    public NotificationAction() { }
98
99
100
101
102
103    /**
104
105     * Description of the Method
106
107     *
108
109     * @param mapping Description of the Parameter
110
111     * @param form Description of the Parameter
112
113     * @param request Description of the Parameter
114
115     * @param response Description of the Parameter
116
117     * @return Description of the Return Value
118
119     * @exception IOException Description of the Exception
120
121     * @exception ServletException Description of the Exception
122
123     */
124
125    public ActionForward perform(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
126
127       throws IOException, ServletException
128
129    {
130
131       Vector parameters = new Vector();
132
133
134
135       // Extract attributes we will need
136
137       Locale locale = getLocale(request);
138
139       MessageResources messages = getResources();
140
141
142
143       // Validate the request parameters specified by the user
144
145       ActionErrors errors = new ActionErrors();
146
147
148
149       ServletContext context = this.getServlet().getServletContext();
150
151       JMXContainer tree = (JMXContainer) context.getAttribute(Constants.TREE);
152
153
154
155       if (tree != null)
156
157       {
158
159          logger.debug("Tree root found => " + tree);
160
161
162
163          Enumeration enum = request.getParameterNames();
164
165          while (enum.hasMoreElements())
166
167          {
168
169             String name = (String) enum.nextElement();
170
171
172
173             logger.debug("Param " + name);
174
175
176
177             if (name.startsWith(":mbean:"))
178
179             {
180
181                String value = request.getParameter(name);
182
183                parameters.add(value);
184
185                logger.debug("Found " + value);
186
187             }
188
189          }
190
191
192
193          logger.debug("Parameters " + parameters.size());
194
195
196
197          for (int i = 0; i < parameters.size(); i++)
198
199          {
200
201             String reference = (String) parameters.elementAt(i);
202
203             String value = request.getParameter(":state:" + reference);
204
205
206
207             logger.debug("Reference " + reference);
208
209             logger.debug("Value " + value);
210
211
212
213             Resource res = (Resource) tree.searchObjectName(reference);
214
215
216
217             logger.debug("ManagedObject " + res);
218
219
220
221             if (res != null)
222
223             {
224
225                try
226
227                {
228
229                   if ("true".equals(value))
230
231                   {
232
233                      res.registerForNotifications();
234
235                   }
236
237                   else
238
239                   {
240
241                      res.unregisterForNotifications();
242
243                   }
244
245                }
246
247                catch (Exception e)
248
249                {
250
251                   logger.error("Exception occured " + e.getMessage());
252
253
254
255                   errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("web.error.exception.message", e.getMessage()));
256
257
258
259                   StringWriter w = new StringWriter();
260
261                   PrintWriter pw = new PrintWriter(w);
262
263                   e.printStackTrace(pw);
264
265                   pw.close();
266
267
268
269                   errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("web.error.exception.stack", w.toString()));
270
271                }
272
273             }
274
275             else
276
277             {
278
279                errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("web.error.no.mbean"));
280
281             }
282
283          }
284
285       }
286
287       else
288
289       {
290
291          errors.add(ActionErrors.GLOBAL_ERROR, new ActionError("web.error.cannot.connect"));
292
293       }
294
295
296
297       // Report any errors we have discovered back to the original form
298
299       if (!errors.empty())
300
301       {
302
303          saveErrors(request, errors);
304
305          return (mapping.findForward("error"));
306
307       }
308
309
310
311       return (mapping.findForward("view"));
312
313    }
314
315 }
316
317
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