code: /***************************************************************************
   *   Copyright (C) by Fabrizio Montesi                                     *
   *                                                                         *
   *   This program is free software; you can redistribute it and/or modify  *
   *   it under the terms of the GNU Library General Public License as       *
   *   published by the Free Software Foundation; either version 2 of the    *
   *   License, or (at your option) any later version.                       *
   *                                                                         *
   *   This program 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 General Public License for more details.                          *
   *                                                                         *
   *   You should have received a copy of the GNU Library General Public     *
   *   License along with this program; if not, write to the                 *
   *   Free Software Foundation, Inc.,                                       *
   *   59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.             *
   *                                                                         *
   *   For details about the authors of this software, see the AUTHORS file. *
   ***************************************************************************/
  
  package jolie.process;
  
  import jolie.ExecutionThread;
  import jolie.Interpreter;
  import jolie.net.CommChannel;
  import jolie.net.CommMessage;
  import jolie.runtime.ExitingException;
  import jolie.runtime.FaultException;
  import jolie.runtime.InternalLink;
  
  public class LinkInProcess implements Process
  {
  	public static class Execution
  	{
  		private CommMessage message = null;
  		private final LinkInProcess parent;
  		
  		public Execution( LinkInProcess parent )
  		{
  			this.parent = parent;
  		}
  
  		private void run()
  			throws FaultException
  		{
  			InternalLink link = InternalLink.getById( parent.linkId );
  			try {
  				link.signForMessage( this );
  				synchronized( this ) {
  					if( message == null && !Interpreter.getInstance().exiting() ) {
  						ExecutionThread ethread = ExecutionThread.currentThread();
  						ethread.setCanBeInterrupted( true );
  						this.wait();
  						ethread.setCanBeInterrupted( false );
  					}
  				}
  			} catch( InterruptedException ie ) {
  				link.cancelWaiting( this );
  			}
  		}
  
  		public synchronized boolean recvMessage( CommChannel channel, CommMessage message )
  		{
  			this.message = message;
  			this.notify();
  			return true;
  		}
  		
  		public boolean isKillable()
  		{
  			return true;
  		}
  	}
  	
  	private final String linkId;
  	
  	public LinkInProcess( String link )
  	{
  		this.linkId = link;
  	}
  	
  	public Process clone( TransformationReason reason )
  	{
  		return new LinkInProcess( linkId );
  	}
  
  	public void run()
  		throws FaultException, ExitingException
  	{
  		if ( ExecutionThread.currentThread().isKilled() ) {
  			return;
  		}
  
  		(new Execution( this )).run();
  	}
  	
  	public boolean isKillable()
  	{
  		return true;
  	}
  }