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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [java/] [lang/] [management/] [GarbageCollectorMXBean.java] - Blame information for rev 771

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1 771 jeremybenn
/* GarbageCollectorMXBean.java - Interface for a garbage collector bean
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   Copyright (C) 2006 Free Software Foundation
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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 java.lang.management;
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/**
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 * Provides access to information about the garbage collectors
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 * of the virtual machine.  Garbage collectors are responsible
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 * for removing unreferenced objects from memory.  A garbage
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 * collector is a type of memory manager, so this interface
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 * is combined with that of generic memory managers.  An instance
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 * of this bean for each garbage collector is obtained by calling
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 * {@link ManagementFactory#getGarbageCollectorMXBeans()}.
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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 interface GarbageCollectorMXBean
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  extends MemoryManagerMXBean
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{
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  /**
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   * Returns the number of collections the garbage collector
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   * represented by this bean has made.  -1 is returned if the
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   * collection count is undefined.
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   *
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   * @return the number of collections made, or -1 if this is
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   *         undefined.
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   */
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  long getCollectionCount();
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  /**
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   * Returns the accumulated number of milliseconds this garbage
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   * collector has spent freeing the memory used by unreferenced
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   * objects.  -1 is returned if the collection time is undefined.
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   * Note that the accumulated time may not change, even when the
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   * collection count increases, if the time taken is sufficiently
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   * short; this depends on the resolution of the timer used.
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   *
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   * @return the accumulated number of milliseconds spent collecting,
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   *         or -1 if this is undefined.
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   */
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  long getCollectionTime();
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}

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