libjava/classpath/gnu/classpath/jdwp/event/ThreadEndEvent.java

   1 /* ThreadEndEvent.java -- An event specifying that a thread has died
   2    Copyright (C) 2005 Free Software Foundation
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 terms of your choice, provided that you also meet, for each linked
  32 independent module, the terms and conditions of the license of that
  33 module.  An independent module is a module which is not derived from
  34 or based on this library.  If you modify this library, you may extend
  35 this exception to your version of the library, but you are not
  36 obligated to do so.  If you do not wish to do so, delete this
  37 exception statement from your version. */
  38
  39
  40 package gnu.classpath.jdwp.event;
  41
  42 import gnu.classpath.jdwp.JdwpConstants;
  43 import gnu.classpath.jdwp.VMIdManager;
  44 import gnu.classpath.jdwp.id.ThreadId;
  45
  46 import java.io.DataOutputStream;
  47 import java.io.IOException;
  48
  49 /**
  50  * "Notification of a completed thread in the target VM. The notification
  51  * is generated by the dying thread before it terminates. Because of this
  52  * timing, it is possible for VirtualMachine.allThreads to return this
  53  * thread after this event is received.
  54  *
  55  * <p>Note that this event gives no information about the lifetime of the
  56  * thread object. It may or may not be collected soon depending on what
  57  * references exist in the target VM." -- JDWP 1.4.2
  58  *
  59  * @author Keith Seitz  (keiths@redhat.com)
  60  */
  61 public class ThreadEndEvent
  62   extends Event
  63 {
  64   private Thread _thread;
  65
  66   /**
  67    * Constructs a new <code>ThreadEndEvent</code>
  68    *
  69    * @param thread  the deceased thread
  70    */
  71   public ThreadEndEvent (Thread thread)
  72   {
  73     super (JdwpConstants.EventKind.THREAD_END);
  74     _thread = thread;
  75   }
  76
  77   /**
  78    * Returns a specific filtering parameter for this event.
  79    * Valid types are ThreadId.
  80    *
  81    * @param type  the type of parameter desired
  82    * @returns the desired parameter or <code>null</code>
  83    */
  84   public Object getParameter (Class type)
  85   {
  86     if (type == ThreadId.class)
  87       return _thread;
  88
  89     return null;
  90   }
  91
  92   /**
  93    * Writes the event to the given stream
  94    *
  95    * @param outStream  the output stream to write the event to
  96    */
  97   protected void _writeData (DataOutputStream outStream)
  98     throws IOException
  99   {
 100     VMIdManager idm = VMIdManager.getDefault();
 101     ThreadId tid = (ThreadId) idm.getObjectId (_thread);
 102     tid.write (outStream);
 103   }
 104 }
 105