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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libjava/] [gnu/] [java/] [lang/] [management/] [VMRuntimeMXBeanImpl.java] - Blame information for rev 756

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1 756 jeremybenn
/* VMRuntimeMXBeanImpl.java - VM implementation of an runtime 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 gnu.java.lang.management;
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import gnu.classpath.SystemProperties;
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import java.net.InetAddress;
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import java.net.UnknownHostException;
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/**
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 * Provides access to information about the virtual machine.
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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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final class VMRuntimeMXBeanImpl
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{
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  /**
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   * Returns the command-line arguments supplied
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   * to the virtual machine, excluding those supplied
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   * to <code>main()</code>.
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   *
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   * @return the command-line arguments.
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   */
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  static native String[] getInputArguments();
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  /**
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   * Returns a developer-chosen name for the virtual
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   * machine, which may differ over different running
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   * instances of the same virtual machine binary.
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   * For example, this may include the particular
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   * process identifier used by this instance or
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   * the host name of the machine on which it is
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   * running.  The intention is that this name refers
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   * to the precise entity that the other data supplied
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   * by the bean refers to, rather than the VM in general.
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   *
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   * @return the custom name of the VM.
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   */
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  static String getName()
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  {
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    String hostName;
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    try
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      {
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        hostName = InetAddress.getLocalHost().getHostName();
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      }
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    catch (UnknownHostException e)
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      {
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        hostName = "Unknown host";
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      }
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    return SystemProperties.getProperty("java.vm.name") + " " +
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      SystemProperties.getProperty("java.vm.version") + " [" +
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      getPID() + "@" + hostName + "]";
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  }
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  /**
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   * The time in milliseconds at which the virtual
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   * machine was started.  This method is only executed
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   * once (for efficency), as the value is not expected
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   * to change.
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   *
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   * @return the VM start time.
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   */
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  static native long getStartTime();
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  /**
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   * The process identifier of the runtime.
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   *
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   * @return the PID of the runtime.
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   */
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  private static native long getPID();
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}

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