OddjobMBeanFactory


1   /*
2    * (c) Rob Gordon 2005.
3    */
4   package org.oddjob.jmx.server;
5   
6   import java.text.DecimalFormat  ;
7   import java.text.NumberFormat  ;
8   
9   import javax.management.JMException  ;
10  import javax.management.MBeanServer  ;
11  import javax.management.MalformedObjectNameException  ;
12  import javax.management.ObjectName  ;
13  
14  import org.apache.log4j.Logger;
15  
16  /**
17   * A factory for producing OddjobMBeans. The MBean names are just sequential formatted numbers.
18   * The root name is created with the 0 number.
19   * 
20   */
21  public class OddjobMBeanFactory {
22      private static final Logger logger = Logger.getLogger(OddjobMBeanFactory.class);
23      
24      /** The server */
25      private final MBeanServer   server;
26      
27      /** Give each bean a serial number. */
28      private int serial = 0;
29  
30      /**
31       * Constructor.
32       * 
33       * @param server The server to register newly created beans with.
34       */
35      public OddjobMBeanFactory(MBeanServer   server) {
36          this.server = server;
37      }
38      
39      /**
40       * Create an MBean and register with the server using the generated name.
41       * 
42       * @param obj The object the MBean is wrapping.
43       * @return The object name registered.
44       * @throws JMException If the MBean fails to register.
45       */
46      public ObjectName   createMBeanFor(Object   obj, ServerContext context)
47      throws JMException   {
48          NumberFormat   f = new DecimalFormat  ("00000000");
49          String   uid = null;
50          synchronized (this) {
51              uid = f.format(serial++);
52          }
53          OddjobMBean ojmb = new OddjobMBean(obj, this, context);
54          ObjectName   objName = new ObjectName  ("oddjob:uid=" + uid);
55          server.registerMBean(ojmb, objName);
56          logger.debug("Created and register OddjobMBean [" + objName.toString() + "]");
57          return objName;
58      }
59      
60      /**
61       * Remove a bean from the server.
62       * 
63       * @param objName The bean.
64       * @throws JMException
65       */
66      public void destroy(ObjectName   objName) throws JMException   {
67          server.invoke(objName, "destroy", new Object  [0], new String  [0]);
68          server.unregisterMBean(objName);        
69          logger.debug("Unregistered OddjobMBean [" + objName.toString() + "]");
70      }
71      
72      public static ObjectName   rootName() {
73          try {
74              return new ObjectName  ("oddjob:uid=00000000");
75          }
76          catch (MalformedObjectNameException   ex) {
77              ex.printStackTrace();
78              return null;
79          }
80      }
81  }
82
A to Z: JavaDoc & Examples Daily Java News & Articles Open Source Projects Open Source Codes Free Computer Books Remove Frame
Popular Tags