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Java > Open Source Codes > com > caucho > quercus > lib > resin > MBeanServer


1 /*
2  * Copyright (c) 1998-2005 Caucho Technology -- all rights reserved
3  *
4  * This file is part of Resin(R) Open Source
5  *
6  * Each copy or derived work must preserve the copyright notice and this
7  * notice unmodified.
8  *
9  * Resin Open Source is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License as published by
11  * the Free Software Foundation; either version 2 of the License, or
12  * (at your option) any later version.
13  *
14  * Resin Open Source is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17  * of NON-INFRINGEMENT. See the GNU General Public License for more
18  * details.
19  *
20  * You should have received a copy of the GNU General Public License
21  * along with Resin Open Source; if not, write to the
22  *
23  * Free Software Foundation, Inc.
24  * 59 Temple Place, Suite 330
25  * Boston, MA 02111-1307 USA
26  *
27  * @author Sam
28  */

29
30
31 package com.caucho.quercus.lib.resin;
32
33 import com.caucho.jmx.Jmx;
34 import com.caucho.quercus.QuercusModuleException;
35 import com.caucho.quercus.annotation.Optional;
36 import com.caucho.quercus.env.ArrayValue;
37 import com.caucho.quercus.env.ArrayValueImpl;
38 import com.caucho.quercus.env.Env;
39 import com.caucho.server.admin.RemoteMBeanConnectionFactory;
40
41 import javax.management.MBeanServerConnection JavaDoc;
42 import javax.management.MalformedObjectNameException JavaDoc;
43 import javax.management.ObjectName JavaDoc;
44 import java.io.IOException JavaDoc;
45 import java.util.Comparator JavaDoc;
46 import java.util.Set JavaDoc;
47 import java.util.TreeSet JavaDoc;
48 import java.util.logging.Logger JavaDoc;
49
50 public class MBeanServer {
51   private static Logger JavaDoc log = Logger.getLogger(MBeanServer.class.getName());
52
53   private static final Comparator JavaDoc<ObjectName JavaDoc> OBJECTNAME_COMPARATOR;
54
55   private final MBeanServerConnection JavaDoc _server;
56
57   /**
58    * Create an MBeanServer that connects to a remote server.
59    *
60    * @param remoteUrl a url that connects to a
61    * {@link com.caucho.services.jmx.JMXService} ussing the hessian protocol.
62    */

63   public MBeanServer(@Optional String JavaDoc url)
64   {
65     if (url == null || "".equals(url)) {
66       _server = Jmx.getGlobalMBeanServer();
67     }
68     else {
69       _server = RemoteMBeanConnectionFactory.create(url);
70     }
71   }
72
73   /**
74    * Perform a jmx lookup to retrieve an {@link MBean} object.
75    *
76    * If the optional name is not provided, the mbean for the current web-app
77    * is returned.
78    *
79    * An unqualified name does not contain a `:' and is used to find an mbean
80    * in the context of the current web-app.
81    *
82    * A fully qualified name contains a `:' and is used to find any mbean within the
83    * server.
84    *
85    * @param name the name to lookup
86    *
87    * @return the mbean object, or null if it is not found.
88    */

89   public MBean lookup(Env env, @Optional String JavaDoc name)
90   {
91     try {
92       if (name == null || name.length() == 0)
93         return null;
94
95       ObjectName JavaDoc objectName = Jmx.getObjectName(name);
96
97       if (_server.isRegistered(objectName))
98         return new MBean(_server, objectName);
99       else
100         return null;
101     }
102     catch (MalformedObjectNameException JavaDoc e) {
103       throw new QuercusModuleException(e);
104     }
105     catch (IOException JavaDoc e) {
106       throw new QuercusModuleException(e);
107     }
108   }
109
110   /**
111    * Returns an array of {@link MBean}s that match a JMX pattern.
112    * If the name contains a ":", it is a query in the global jmx namespace.
113    * If the name does not contain a ":", it is a search in the JMX namespace
114    * of the current web application.
115    */

116   public ArrayValue query(Env env, String JavaDoc pattern)
117   {
118     try {
119       ArrayValueImpl values = new ArrayValueImpl();
120
121       ObjectName JavaDoc patternObjectName;
122
123       patternObjectName = new ObjectName JavaDoc(pattern);
124
125       Set JavaDoc<ObjectName JavaDoc> objectNames;
126
127       objectNames = _server.queryNames(patternObjectName, null);
128
129       if (objectNames == null)
130         return values;
131
132       javax.management.MBeanServer JavaDoc server;
133       server = Jmx.getGlobalMBeanServer();
134
135       TreeSet JavaDoc<ObjectName JavaDoc> sortedObjectNames
136         = new TreeSet JavaDoc<ObjectName JavaDoc>(OBJECTNAME_COMPARATOR);
137
138       sortedObjectNames.addAll(objectNames);
139
140       for (ObjectName JavaDoc objectName : sortedObjectNames)
141         values.put(env.wrapJava(new MBean(server, objectName)));
142
143       return values;
144     }
145     catch (MalformedObjectNameException JavaDoc e) {
146       throw new QuercusModuleException(e);
147     }
148     catch (IOException JavaDoc e) {
149       throw new QuercusModuleException(e);
150     }
151   }
152
153   static {
154     OBJECTNAME_COMPARATOR = new Comparator JavaDoc<ObjectName JavaDoc>() {
155       public int compare(ObjectName JavaDoc o1, ObjectName JavaDoc o2)
156       {
157         if (o1 == null)
158           return -1;
159
160         if (o2 == null)
161           return 1;
162
163         return o1.getCanonicalName().compareTo(o2.getCanonicalName());
164       }
165     };
166   }
167 }
168
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