|
1
9 package org.jboss.portal.common.util;
10
11 import java.util.Comparator  ;
12 import java.util.Hashtable ;
13 import java.util.Properties ;
14
15 import javax.management.InstanceNotFoundException ;
16 import javax.management.ListenerNotFoundException ;
17 import javax.management.MBeanRegistrationException ;
18 import javax.management.MBeanServer ;
19 import javax.management.MalformedObjectNameException ;
20 import javax.management.NotificationFilter ;
21 import javax.management.NotificationListener ;
22 import javax.management.ObjectName ;
23
24 import org.apache.log4j.Logger;
25 import org.jboss.mx.util.MBeanProxy;
26 import org.jboss.mx.util.MBeanProxyCreationException;
27 import org.jboss.mx.util.ObjectNameConverter;
28
29
33 public final class JMX
34 {
35
36 private static final Logger log = Logger.getLogger(JMX.class);
37
38 public static ObjectName extend(ObjectName name, Properties keyProperties)
39 {
40 try
41 {
42 Hashtable table = name.getKeyPropertyList();
43 table.putAll(keyProperties);
44 return ObjectNameConverter.convert(name.getDomain(), table);
45 }
46 catch (MalformedObjectNameException e)
47 {
48 log.error("", e);
49 throw new RuntimeException ();
50 }
51 }
52
53
56 public static Comparator OBJECT_NAME_COMPARATOR = new Comparator ()
57 {
58 public int compare(Object o1, Object o2)
59 {
60 ObjectName n1 = (ObjectName ) o1;
61 ObjectName n2 = (ObjectName ) o2;
62 return n1.getCanonicalName().compareTo(n2.getCanonicalName());
63 }
64 };
65
66 public static void safeUnregister(MBeanServer server, ObjectName name)
67 {
68 if (server != null)
69 {
70 if (name != null)
71 {
72 try
73 {
74 server.unregisterMBean(name);
75 }
76 catch (InstanceNotFoundException e)
77 {
78 log.error("MBean " + name + " nto here");
79 }
80 catch (MBeanRegistrationException e)
81 {
82 log.error("MBean threw an exception during unregistration", e.getTargetException());
83 }
84 }
85 else
86 {
87 log.error("Cannot unregister a null MBean");
88 }
89 }
90 else
91 {
92 log.error("Cannot unregister with a null MBeanServer");
93 }
94 }
95
96 public static Object getMBeanProxy(Class clazz, ObjectName name, MBeanServer server)
97 {
98 try
99 {
100 return MBeanProxy.get(clazz, name, server);
101 }
102 catch (MBeanProxyCreationException e)
103 {
104 log.error("Unexpected error during proxy creation", e);
105 throw new Error ("Unexpected error during proxy creation");
106 }
107 }
108
109 public static boolean addNotificationListener(
110 MBeanServer server,
111 ObjectName name,
112 NotificationListener listener,
113 NotificationFilter filter,
114 Object handback)
115 {
116 try
117 {
118 server.addNotificationListener(name, listener, filter, handback);
119 return true;
120 }
121 catch (InstanceNotFoundException e)
122 {
123 return false;
124 }
125 }
126
127 public static boolean removeNotificationListener(
128 MBeanServer server,
129 ObjectName name,
130 NotificationListener listener)
131 {
132 try
133 {
134 server.removeNotificationListener(name, listener);
135 return true;
136 }
137 catch (InstanceNotFoundException e)
138 {
139 log.error("Cannot remove notification listener", e);
140 return false;
141 }
142 catch (ListenerNotFoundException e)
143 {
144 log.error("Cannot remove notification listener", e);
145 return false;
146 }
147 }
148 }
149 |
Popular Tags |
Java API By Example, From Geeks To Geeks.