forked from amazingfate/loongoffice
129 lines
4.1 KiB
Java
129 lines
4.1 KiB
Java
/*************************************************************************
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*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* Copyright 2000, 2010 Oracle and/or its affiliates.
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*
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* OpenOffice.org - a multi-platform office productivity suite
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*
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* This file is part of OpenOffice.org.
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*
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* OpenOffice.org is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License version 3
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* only, as published by the Free Software Foundation.
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*
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* OpenOffice.org is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License version 3 for more details
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* (a copy is included in the LICENSE file that accompanied this code).
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*
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* You should have received a copy of the GNU Lesser General Public License
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* version 3 along with OpenOffice.org. If not, see
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* <http://www.openoffice.org/license.html>
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* for a copy of the LGPLv3 License.
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*
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************************************************************************/
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package com.sun.star.comp.beans;
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//---------------------------------------------------------------------------
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/** Helper class to watch calls into OOo with a timeout.
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*/
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//Do not add the thread instances to a threadgroup. When testing the bean in
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//an applet it turned out the the ThreadGroup was in an inconsistent state
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//after navigating off the site that contains the applet and back to it.
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//That was tested with a Sun JRE 1.4.2_06
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public class CallWatchThread extends Thread
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{
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private static boolean DEBUG = false;
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private Thread aWatchedThread;
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private String aTag;
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private boolean bAlive;
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private long nTimeout;
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public CallWatchThread(long nTimeout)
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{
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this(nTimeout, "");
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}
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public CallWatchThread( long nTimeout, String aTag )
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{
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super(aTag);
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this.aWatchedThread = Thread.currentThread();
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this.nTimeout = nTimeout;
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this.aTag = aTag;
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setDaemon( true );
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dbgPrint( "CallWatchThread(" + this + ").start(" + aTag + ")" );
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start();
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}
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public void cancel()
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throws java.lang.InterruptedException
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{
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dbgPrint( "CallWatchThread(" + this + ".cancel(" + aTag + ")" );
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if ( aWatchedThread != null && aWatchedThread != Thread.currentThread() )
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throw new RuntimeException( "wrong thread" );
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aWatchedThread = null;
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if ( interrupted() )
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throw new InterruptedException();
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}
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public synchronized void restart()
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throws java.lang.InterruptedException
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{
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dbgPrint( "CallWatchThread(" + this + ".restart(" + aTag + ")" );
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if ( aWatchedThread != null && aWatchedThread != Thread.currentThread() )
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throw new RuntimeException( "wrong thread" );
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bAlive = true;
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if ( interrupted() )
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throw new InterruptedException();
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notify();
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}
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public void run()
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{
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dbgPrint( "CallWatchThread(" + this + ".run(" + aTag + ") ***** STARTED *****" );
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long n = 0;
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while ( aWatchedThread != null )
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{
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dbgPrint( "CallWatchThread(" + this + ").run(" + aTag + ") running #" + ++n );
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synchronized(this)
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{
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bAlive = false;
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try
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{
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wait( nTimeout );
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}
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catch ( java.lang.InterruptedException aExc )
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{
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bAlive = false;
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}
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// watched thread seems to be dead (not answering)?
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if ( !bAlive && aWatchedThread != null )
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{
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dbgPrint( "CallWatchThread(" + this + ").run(" + aTag + ") interrupting" );
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aWatchedThread.interrupt();
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aWatchedThread = null;
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}
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}
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}
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dbgPrint( "CallWatchThread(" + this + ").run(" + aTag + ") terminated" );
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}
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private void dbgPrint( String aMessage )
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{
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if (DEBUG)
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System.err.println( "OOoBean: " + aMessage );
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}
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}
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