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1
9 package org.jboss.portal.common.mx;
10
11 import javax.management.InstanceNotFoundException  ;
12 import javax.management.ListenerNotFoundException ;
13 import javax.management.MBeanServer ;
14 import javax.management.Notification ;
15 import javax.management.NotificationFilter ;
16 import javax.management.NotificationListener ;
17 import javax.management.ObjectName ;
18
19 import org.apache.log4j.Logger;
20
21
27 public class Listener implements NotificationFilter , NotificationListener
28 {
29
30 protected final MBeanServer server;
31 protected final Logger log;
32
33 public Listener(MBeanServer server)
34 {
35 if (server == null)
36 {
37 throw new IllegalArgumentException ("server must not be null");
38 }
39 this.server = server;
40 this.log = Logger.getLogger(getClass());
41 }
42
43 public void register(ObjectName broadcaster)
44 {
45 register(broadcaster, null);
46 }
47
48 public void register(ObjectName broadcaster, Object handback)
49 {
50 try
51 {
52 if (broadcaster == null)
53 {
54 throw new IllegalArgumentException ("Broadcaster is null");
55 }
56
57 log.debug("Register notifications on MBean " + broadcaster.getCanonicalName());
58 server.addNotificationListener(broadcaster, this, this, handback);
59 }
60 catch (InstanceNotFoundException e)
61 {
62 throw new ListenerException(e);
63 }
64 }
65
66 public void unregister(ObjectName broadcaster)
67 {
68 try
69 {
70 if (broadcaster == null)
71 {
72 throw new IllegalArgumentException ("Broadcaster is null");
73 }
74
75 log.debug("Unregister notifications on MBean " + broadcaster.getCanonicalName());
76 server.removeNotificationListener(broadcaster, this);
77 }
78 catch (InstanceNotFoundException e)
79 {
80 throw new ListenerException(e);
81 }
82 catch (ListenerNotFoundException e)
83 {
84 throw new ListenerException(e);
85 }
86 }
87
88
91 public boolean isNotificationEnabled(Notification notification)
92 {
93 return true;
94 }
95
96
99 public void handleNotification(Notification notification, Object handback)
100 {
101 }
102 }
103 |
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