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1   /**
2    * Copyright (c) 2002-2011 "Neo Technology,"
3    * Network Engine for Objects in Lund AB [http://neotechnology.com]
4    *
5    * This file is part of Neo4j.
6    *
7    * Neo4j is free software: you can redistribute it and/or modify
8    * it under the terms of the GNU General Public License as published by
9    * the Free Software Foundation, either version 3 of the License, or
10   * (at your option) any later version.
11   *
12   * This program is distributed in the hope that it will be useful,
13   * but WITHOUT ANY WARRANTY; without even the implied warranty of
14   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15   * GNU General Public License for more details.
16   *
17   * You should have received a copy of the GNU General Public License
18   * along with this program.  If not, see <http://www.gnu.org/licenses/>.
19   */
20  package org.neo4j.server.webadmin.rest.representations;
21  
22  import org.neo4j.server.rest.repr.ObjectRepresentation;
23  import org.neo4j.server.rest.repr.Representation;
24  import org.neo4j.server.rest.repr.ValueRepresentation;
25  
26  import javax.management.MBeanAttributeInfo;
27  import javax.management.MBeanServer;
28  import javax.management.ObjectName;
29  
30  import java.lang.management.ManagementFactory;
31  
32  public class JmxAttributeRepresentation extends ObjectRepresentation
33  {
34  
35      protected ObjectName objectName;
36      protected MBeanAttributeInfo attrInfo;
37      protected MBeanServer jmxServer = ManagementFactory.getPlatformMBeanServer();
38      
39      public JmxAttributeRepresentation( ObjectName objectName,
40              MBeanAttributeInfo attrInfo )
41      {
42          super( "jmxAttribute" );
43          this.objectName = objectName;
44          this.attrInfo = attrInfo;
45      }
46  
47      @Mapping( "name" )
48      public ValueRepresentation getName()
49      {
50          return ValueRepresentation.string( attrInfo.getName() );
51      }
52  
53      @Mapping( "description" )
54      public ValueRepresentation getDescription()
55      {
56          return ValueRepresentation.string( attrInfo.getDescription() );
57      }
58  
59      @Mapping( "type" )
60      public ValueRepresentation getType()
61      {
62          return ValueRepresentation.string( attrInfo.getType() );
63      }
64  
65      @Mapping( "isReadable" )
66      public ValueRepresentation isReadable()
67      {
68          return bool( attrInfo.isReadable() );
69      }
70  
71      @Mapping( "isWriteable" )
72      public ValueRepresentation isWriteable()
73      {
74          return bool( attrInfo.isWritable() );
75      }
76  
77      @Mapping( "isIs" )
78      public ValueRepresentation isIs()
79      {
80          return bool( attrInfo.isIs() );
81      }
82  
83      private ValueRepresentation bool( Boolean value )
84      {
85          return ValueRepresentation.string( value ? "true" : "false " );
86      }
87  
88      @Mapping( "value" )
89      public Representation getValue()
90      {
91          try
92          {
93              JmxAttributeRepresentationDispatcher representationDispatcher = new JmxAttributeRepresentationDispatcher();
94              Object value = jmxServer.getAttribute( objectName,
95                      attrInfo.getName() );
96              return representationDispatcher.dispatch( value, "" );
97          }
98          catch ( Exception e )
99          {
100             return ValueRepresentation.string( "N/A" );
101         }
102     }
103 
104 }