01: /*
02: * JBoss, Home of Professional Open Source.
03: * Copyright 2006, Red Hat Middleware LLC, and individual contributors
04: * as indicated by the @author tags. See the copyright.txt file in the
05: * distribution for a full listing of individual contributors.
06: *
07: * This is free software; you can redistribute it and/or modify it
08: * under the terms of the GNU Lesser General Public License as
09: * 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 javax.management;
23:
24: import java.io.Serializable;
25:
26: import org.jboss.mx.util.QueryExpSupport;
27:
28: /**
29: * Support for evaluting a query in the context of an MBeanServer.
30: *
31: * <p><b>Revisions:</b>
32: * <p><b>20020317 Adrian Brock:</b>
33: * <ul>
34: * <li>Make queries thread safe
35: * </ul>
36: *
37: * @author <a href="mailto:Adrian.Brock@HappeningTimes.com">Adrian Brock</a>.
38: * @version $Revision: 57200 $
39: */
40: public abstract class QueryEval implements Serializable {
41: // Constants ---------------------------------------------------
42:
43: private static final long serialVersionUID = 2675899265640874796L;
44:
45: // Attributes --------------------------------------------------
46:
47: // Static ------------------------------------------------------
48:
49: // Public ------------------------------------------------------
50:
51: /** Return the MBean server that was most recently given to the
52: * setMBeanServer method by this thread. If this thread never called that
53: * method, the result is the value its parent thread would have obtained
54: * from getMBeanServer at the moment of the creation of this thread, or
55: * null if there is no parent thread.
56: *
57: * @return the current MBeanServer thread association.
58: */
59: public static MBeanServer getMBeanServer() {
60: return (MBeanServer) QueryExpSupport.server.get();
61: }
62:
63: /**
64: * Set the MBeanServer for this query. Only MBeans registered in
65: * this server can be used in queries.
66: *
67: * @param mbeanServer the MBeanServer
68: */
69: public void setMBeanServer(MBeanServer mbeanServer) {
70: QueryExpSupport.server.set(mbeanServer);
71: }
72: }
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