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79 lines
1.8 KiB
79 lines
1.8 KiB
/*
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* Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved.
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* ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
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*
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*
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*
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*/
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package javax.management;
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// java import
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import java.io.Serializable;
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/**
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* Allows a query to be performed in the context of a specific MBean server.
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*
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* @since 1.5
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*/
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public abstract class QueryEval implements Serializable {
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/* Serial version */
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private static final long serialVersionUID = 2675899265640874796L;
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private static ThreadLocal<MBeanServer> server =
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new InheritableThreadLocal<MBeanServer>();
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/**
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* <p>Sets the MBean server on which the query is to be performed.
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* The setting is valid for the thread performing the set.
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* It is copied to any threads created by that thread at the moment
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* of their creation.</p>
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*
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* <p>For historical reasons, this method is not static, but its
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* behavior does not depend on the instance on which it is
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* called.</p>
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*
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* @param s The MBean server on which the query is to be performed.
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*
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* @see #getMBeanServer
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*/
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public void setMBeanServer(MBeanServer s) {
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server.set(s);
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}
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/**
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* <p>Return the MBean server that was most recently given to the
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* {@link #setMBeanServer setMBeanServer} method by this thread.
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* If this thread never called that method, the result is the
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* value its parent thread would have obtained from
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* <code>getMBeanServer</code> at the moment of the creation of
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* this thread, or null if there is no parent thread.</p>
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*
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* @return the MBean server.
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*
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* @see #setMBeanServer
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*
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*/
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public static MBeanServer getMBeanServer() {
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return server.get();
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}
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}
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