1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19 package org.apache.commons.jcs.jcache.jmx;
20
21 import javax.management.MBeanServer;
22 import javax.management.MBeanServerFactory;
23 import javax.management.ObjectName;
24 import java.lang.management.ManagementFactory;
25
26 public class JMXs
27 {
28 private static final MBeanServer SERVER = findMBeanServer();
29
30 public static MBeanServer server()
31 {
32 return SERVER;
33 }
34
35 public static void register(final ObjectName on, final Object bean)
36 {
37 if (!SERVER.isRegistered(on))
38 {
39 try
40 {
41 SERVER.registerMBean(bean, on);
42 }
43 catch (final Exception e)
44 {
45 throw new IllegalStateException(e.getMessage(), e);
46 }
47 }
48 }
49
50 public static void unregister(final ObjectName on)
51 {
52 if (SERVER.isRegistered(on))
53 {
54 try
55 {
56 SERVER.unregisterMBean(on);
57 }
58 catch (final Exception e)
59 {
60 // no-op
61 }
62 }
63 }
64
65 private static MBeanServer findMBeanServer()
66 {
67 if (System.getProperty("javax.management.builder.initial") != null)
68 {
69 return MBeanServerFactory.createMBeanServer();
70 }
71 return ManagementFactory.getPlatformMBeanServer();
72 }
73
74 private JMXs()
75 {
76 // no-op
77 }
78 }