mirror of git://gcc.gnu.org/git/gcc.git
96 lines
3.2 KiB
Java
96 lines
3.2 KiB
Java
/* QueryEval.java -- An evaluation context for a MBean server query.
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Copyright (C) 2007 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.management;
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import java.io.Serializable;
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/**
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* Represents the evaluation context of a {@link MBeanServer}
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* query by retaining the server used on a thread-by-thread
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* basis.
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*
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* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
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* @since 1.5
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*/
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public class QueryEval
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implements Serializable
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{
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/**
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* Compatible with JDK 1.5
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*/
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private static final long serialVersionUID = 2675899265640874796L;
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/**
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* Stores the server used, on a
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* thread-by-thread basis.
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*/
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private static InheritableThreadLocal<MBeanServer> server =
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new InheritableThreadLocal<MBeanServer>();
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/**
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* Returns the {@link MBeanServer} last supplied to the
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* {@link #setMBeanServer(MBeanServer)} method. If this method
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* has not been called for this thread, then the value will be
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* inherited from any parent thread on which the method has
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* been called. If the method has never been called, then
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* <code>null</code> is returned.
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*
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* @return the server.
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* @see #setMBeanServer(MBeanServer)
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*/
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public static MBeanServer getMBeanServer()
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{
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return server.get();
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}
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/**
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* Sets the {@link MBeanServer} on which the query will be
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* performed. This value is inherited automatically by
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* child threads. This method is only non-static for historical
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* reasons; it makes no use of instance-related values.
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*
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* @param svr the server to use.
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*/
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public void setMBeanServer(MBeanServer svr)
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{
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server.set(svr);
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}
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}
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