| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| package com.sun.star.comp.beans; |
| |
| |
| //--------------------------------------------------------------------------- |
| /** Helper class to watch calls into OOo with a timeout. |
| */ |
| //Do not add the thread instances to a threadgroup. When testing the bean in |
| //an applet it turned out the the ThreadGroup was in an inconsistent state |
| //after navigating off the site that contains the applet and back to it. |
| //That was tested with a Sun JRE 1.4.2_06 |
| public class CallWatchThread extends Thread |
| { |
| private static boolean DEBUG = false; |
| |
| private Thread aWatchedThread; |
| private String aTag; |
| private boolean bAlive; |
| private long nTimeout; |
| |
| public CallWatchThread(long nTimeout) |
| { |
| this(nTimeout, ""); |
| } |
| |
| public CallWatchThread( long nTimeout, String aTag ) |
| { |
| super(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 ); |
| } |
| } |
| |
| |
| |
| |