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Java > Open Source Codes > org > jboss > system > Registry


1 /*
2 * JBoss, Home of Professional Open Source
3 * Copyright 2005, JBoss Inc., and individual contributors as indicated
4 * by the @authors tag. See the copyright.txt in the distribution for a
5 * full listing of individual contributors.
6 *
7 * This is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU Lesser General Public License as
9 * published by the Free Software Foundation; either version 2.1 of
10 * the License, or (at your option) any later version.
11 *
12 * This software is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this software; if not, write to the Free
19 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
20 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
21 */
22 package org.jboss.system;
23
24 import java.util.Map JavaDoc;
25
26 import org.jboss.logging.Logger;
27
28 import EDU.oswego.cs.dl.util.concurrent.ConcurrentReaderHashMap;
29
30 /**
31  * A registry, really, a registry.
32  *
33  * <p>All methods static to lookup pointers from anyplace in the VM.
34  * We use it for hooking up JMX managed objects. Use the JMX MBeanName
35  * to put objects here.
36  *
37  * @author <a HREF="mailto:marc.fleury@jboss.org>Marc Fleury</a>
38  * @version $Revision: 42600 $
39  */
40 public class Registry
41 {
42    private static final Logger log = Logger.getLogger(Registry.class);
43    
44    public static Map JavaDoc entries = new ConcurrentReaderHashMap();
45    
46    public static void bind(final Object JavaDoc key, final Object JavaDoc value)
47    {
48       entries.put(key, value);
49       if(log.isTraceEnabled())
50          log.trace("bound " + key + "=" + value);
51    }
52    
53    public static Object JavaDoc unbind(final Object JavaDoc key)
54    {
55       Object JavaDoc obj = entries.remove(key);
56       if(log.isTraceEnabled())
57          log.trace("unbound " + key + "=" + obj);
58       return obj;
59    }
60    
61    public static Object JavaDoc lookup(final Object JavaDoc key)
62    {
63       Object JavaDoc obj = entries.get(key);
64       if(log.isTraceEnabled())
65          log.trace("lookup " + key + "=" + obj);
66       return obj;
67    }
68 }
69
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