HolderMBean


1   // ========================================================================
2   // $Id: HolderMBean.java,v 1.5 2005/08/13 00:01:27 gregwilkins Exp $
3   // Copyright 200-2004 Mort Bay Consulting Pty. Ltd.
4   // ------------------------------------------------------------------------
5   // Licensed under the Apache License, Version 2.0 (the "License");
6   // you may not use this file except in compliance with the License.
7   // You may obtain a copy of the License at 
8   // http://www.apache.org/licenses/LICENSE-2.0
9   // Unless required by applicable law or agreed to in writing, software
10  // distributed under the License is distributed on an "AS IS" BASIS,
11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  // See the License for the specific language governing permissions and
13  // limitations under the License.
14  // ========================================================================
15  
16  package org.mortbay.jetty.servlet.jmx;
17  
18  import javax.management.MBeanException  ;
19  import javax.management.MBeanServer  ;
20  import javax.management.ObjectName  ;
21  
22  import org.apache.commons.logging.Log;
23  import org.mortbay.log.LogFactory;
24  import org.mortbay.jetty.servlet.Holder;
25  import org.mortbay.util.LogSupport;
26  import org.mortbay.util.jmx.LifeCycleMBean;
27  
28  
29  /* ------------------------------------------------------------ */
30  /** 
31   *
32   * @version $Revision: 1.5 $
33   * @author Greg Wilkins (gregw)
34   */
35  public class HolderMBean extends LifeCycleMBean  
36  {
37      private static Log log = LogFactory.getLog(HolderMBean.class);
38  
39      /* ------------------------------------------------------------ */
40      private Holder _holder;
41      
42      /* ------------------------------------------------------------ */
43      /** Constructor. 
44       * @exception MBeanException 
45       */
46      public HolderMBean()
47          throws MBeanException  
48      {}
49      
50      /* ------------------------------------------------------------ */
51      protected void defineManagedResource()
52      {
53          super.defineManagedResource();
54          
55          defineAttribute("name");
56          defineAttribute("displayName");
57          defineAttribute("className");
58          defineAttribute("initParameters",READ_ONLY,ON_MBEAN);
59          
60          _holder=(Holder)getManagedResource();
61      }
62      
63      /* ---------------------------------------------------------------- */
64      public String   getInitParameters()
65      {
66          return ""+_holder.getInitParameters();
67      }
68      
69      /* ------------------------------------------------------------ */
70      public synchronized ObjectName   uniqueObjectName(MBeanServer   server,
71                                                      String   objectName)
72      {
73          try
74          {
75              String   name=_holder.getDisplayName();
76              if (name==null || name.length()==0)
77                  name=_holder.getClassName();
78              return new ObjectName  (objectName+",name="+name);
79          }
80          catch(Exception   e)
81          {
82              log.warn(LogSupport.EXCEPTION,e);
83              return super.uniqueObjectName(server,objectName);
84          }
85      }
86  }
87
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