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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [classpath/] [java/] [lang/] [management/] [ClassLoadingMXBean.java] - Rev 771

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/* ClassLoadingMXBean.java - Interface for a class loading bean
   Copyright (C) 2006 Free Software Foundation
 
This file is part of GNU Classpath.
 
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
 
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
General Public License for more details.
 
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING.  If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
 
Linking this library statically or dynamically with other modules is
making a combined work based on this library.  Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
 
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module.  An independent module is a module which is not derived from
or based on this library.  If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so.  If you do not wish to do so, delete this
exception statement from your version. */
 
package java.lang.management;
 
/**
 * Provides access to information about the class loading
 * behaviour of the current invocation of the virtual
 * machine.  An instance of this bean is obtained by calling
 * {@link ManagementFactory#getClassLoadingMXBean()}.
 *
 * @author Andrew John Hughes (gnu_andrew@member.fsf.org)
 * @since 1.5
 */
public interface ClassLoadingMXBean
{
 
  /**
   * Returns the number of classes currently loaded by
   * the virtual machine.
   *
   * @return the number of loaded classes.
   */
  int getLoadedClassCount();
 
  /**
   * Returns the total number of classes loaded by the
   * virtual machine since it was started.  This is the
   * sum of the currently loaded classes and those that
   * have been unloaded.
   *
   * @return the total number of classes that have been
   *         loaded by the virtual machine since it started.
   */
  long getTotalLoadedClassCount();
 
  /**
   * Returns the number of classes that have been unloaded
   * by the virtual machine since it was started.
   *
   * @return the number of unloaded classes.
   */
  long getUnloadedClassCount();
 
  /**
   * Returns true if the virtual machine will emit additional
   * information when classes are loaded and unloaded.  The
   * format of the output is left up to the virtual machine.
   *
   * @return true if verbose class loading output is on.
   */
  boolean isVerbose();
 
  /**
   * Turns on or off the emission of additional information
   * when classes are loaded and unloaded.  The format of the
   * output is left up to the virtual machine.  This method
   * may be called by multiple threads concurrently, but there
   * is only one global setting of verbosity that is affected.
   *
   * @param verbose the new setting for verbose class loading
   *                output.
   * @throws SecurityException if a security manager exists and
   *                           denies ManagementPermission("control").
   */
  void setVerbose(boolean verbose);
 
}
 

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