code: /***************************************************************************
   *   Copyright (C) 2008 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 joliex.metaservice;
  
  import java.io.IOException;
  import jolie.net.CommChannel;
  import jolie.net.CommMessage;
  import jolie.runtime.FaultException;
  import jolie.runtime.Value;
  
  /**
   * A simple channel for exchanging messages with a service powered by MetaService.
   * @author Fabrizio Montesi
   */
  public class MetaServiceChannel implements Cloneable
  {
  	private final MetaService metaService;
  	private final String resourceName;
  	private final CommChannel channel;
  	//private final boolean persistent;
  	
  	public MetaServiceChannel( MetaService metaService, String resourceName )
  		throws IOException
  	{
  		this.metaService = metaService;
  		this.resourceName = resourceName;
  		this.channel = metaService.createCommChannel();
  		/*this.persistent = persistent;
  		if ( persistent ) {
  			channel = metaService.createCommChannel();
  		}*/
  	}
  	
  	@Override
  	public MetaServiceChannel clone()
  		throws CloneNotSupportedException
  	{
  		try {
  			return new MetaServiceChannel( metaService, resourceName );
  		} catch( IOException e ) {
  			throw new CloneNotSupportedException();
  		}
  	}
  	
  	public String resourceName()
  	{
  		return resourceName;
  	}
  
  	public void send( String operationName, Value value )
  		throws IOException
  	{
  		/*if ( !persistent ) {
  			channel = metaService.createCommChannel();
  		}*/
  		channel.send(
  			CommMessage.createRequest( operationName, resourceName, value )
  		);
  	}
  	
  	public Value recv()
  		throws IOException, FaultException
  	{
  		CommMessage message = channel.recv();
  		if ( message.isFault() ) {
  			throw message.fault();
  		}
  		return message.value();
  	}
  }
  