INTEGRATION: CWS jl18 (1.1.2); FILE ADDED

2005/03/18 09:56:43 jl 1.1.2.1: #45371# This CallWatchThread replaces the implementations in LocalOfficeWindow and OOoBean

bean/com/sun/star/comp/beans/CallWatchThread.java

+/*************************************************************************
+ *
+ *  $RCSfile: CallWatchThread.java,v $
+ *
+ *  $Revision: 1.2 $
+ *
+ *  last change: $Author: vg $ $Date: 2005-03-23 08:58:39 $
+ *
+ *  The Contents of this file are made available subject to the terms of
+ *  either of the following licenses
+ *
+ *         - GNU Lesser General Public License Version 2.1
+ *         - Sun Industry Standards Source License Version 1.1
+ *
+ *  Sun Microsystems Inc., September, 2004
+ *
+ *  GNU Lesser General Public License Version 2.1
+ *  =============================================
+ *  Copyright 2004 by Sun Microsystems, Inc.
+ *  901 San Antonio Road, Palo Alto, CA 94303, USA
+ *
+ *  This library is free software; you can redistribute it and/or
+ *  modify it under the terms of the GNU Lesser General Public
+ *  License version 2.1, as published by the Free Software Foundation.
+ *
+ *  This library 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
+ *  Lesser General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Lesser General Public
+ *  License along with this library; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston,
+ *  MA  02111-1307  USA
+ *
+ *
+ *  Sun Industry Standards Source License Version 1.1
+ *  =================================================
+ *  The contents of this file are subject to the Sun Industry Standards
+ *  Source License Version 1.1 (the "License"); You may not use this file
+ *  except in compliance with the License. You may obtain a copy of the
+ *  License at http://www.openoffice.org/license.html.
+ *
+ *  Software provided under this License is provided on an "AS IS" basis,
+ *  WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ *  WITHOUT LIMITATION, WARRANTIES THAT THE SOFTWARE IS FREE OF DEFECTS,
+ *  MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, OR NON-INFRINGING.
+ *  See the License for the specific provisions governing your rights and
+ *  obligations concerning the Software.
+ *
+ *  The Initial Developer of the Original Code is: Sun Microsystems, Inc.
+ *
+ *  Copyright: 2004 by Sun Microsystems, Inc.
+ *
+ *  All Rights Reserved.
+ *
+ *  Contributor(s): _______________________________________
+ *
+ *
+ ************************************************************************/
+
+package com.sun.star.comp.beans;
+
+
+//---------------------------------------------------------------------------
+/** Helper class to watch calls into OOo with a timeout.
+ */
+public class CallWatchThread extends Thread
+{
+    private static boolean DEBUG = false;
+
+    private Thread aWatchedThread;
+    private String aTag;
+    private boolean bAlive;
+    private long nTimeout;
+
+    private static ThreadGroup aWatcherGroup;
+
+    static
+    {
+        aWatcherGroup = new ThreadGroup("OOoBean Call Watcher Threads");
+        aWatcherGroup.setDaemon(false);
+    }
+
+    public CallWatchThread(long nTimeout)
+    {
+        this(nTimeout, "");
+    }
+
+    public CallWatchThread( long nTimeout, String aTag )
+    {
+        super(aWatcherGroup, aTag);
+        this.aWatchedThread = Thread.currentThread();
+        this.nTimeout = nTimeout;
+
+        this.aTag = aTag;
+        setDaemon( true );
+        dbgPrint( "CallWatchThread(" + this + ").start(" + aTag + ")" );
+        start();
+    }
+
+    public void cancel()
+        throws java.lang.InterruptedException
+    {
+        dbgPrint( "CallWatchThread(" + this + ".cancel(" + aTag + ")" );
+        if ( aWatchedThread != null && aWatchedThread != Thread.currentThread() )
+            throw new RuntimeException( "wrong thread" );
+        aWatchedThread = null;
+        if ( interrupted() )
+            throw new InterruptedException();
+    }
+
+    public synchronized void restart()
+        throws java.lang.InterruptedException
+    {
+        dbgPrint( "CallWatchThread(" + this + ".restart(" + aTag + ")" );
+        if ( aWatchedThread != null && aWatchedThread != Thread.currentThread() )
+            throw new RuntimeException( "wrong thread" );
+        bAlive = true;
+        if ( interrupted() )
+            throw new InterruptedException();
+        notify();
+    }
+
+    public void run()
+    {
+        dbgPrint( "CallWatchThread(" + this + ".run(" + aTag + ") ***** STARTED *****" );
+        long n = 0;
+        while ( aWatchedThread != null )
+        {
+            dbgPrint( "CallWatchThread(" + this + ").run(" + aTag + ") running #" + ++n );
+            synchronized(this)
+            {
+                bAlive = false;
+                try
+                {
+                    wait( nTimeout );
+                }
+                catch ( java.lang.InterruptedException aExc )
+                {
+                    bAlive = false;
+                }
+
+                // watched thread seems to be dead (not answering)?
+                if ( !bAlive && aWatchedThread != null )
+                {
+                    dbgPrint( "CallWatchThread(" + this + ").run(" + aTag + ") interrupting" );
+                    aWatchedThread.interrupt();
+                    aWatchedThread = null;
+                }
+            }
+        }
+
+        dbgPrint( "CallWatchThread(" + this + ").run(" + aTag + ") terminated" );
+    }
+
+    private void dbgPrint( String aMessage )
+    {
+        if (DEBUG)
+            System.err.println( "OOoBean: " + aMessage );
+    }
+}
+
+
+
+