/******************************************************************************
 * Product: Compiere ERP & CRM Smart Business Solution                        *
 * Copyright (C) 1999-2007 ComPiere, Inc. All Rights Reserved.                *
 * This program is free software, you can redistribute it and/or modify it    *
 * under the terms version 2 of the GNU General Public License as published   *
 * by the Free Software Foundation. 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 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 the text or an alternative of this public license, you may reach us    *
 * ComPiere, Inc., 3600 Bridge Parkway #102, Redwood City, CA 94065, USA      *
 * or via info@compiere.org or http://www.compiere.org/license.html           *
 *****************************************************************************/
package org.compiere.model;

import java.sql.*;
import java.util.*;
import java.util.logging.*;
import org.compiere.util.*;

/**
 * 	Operating Task Model
 *	
 *  @author Jorg Janke
 *  @version $Id: MTask.java,v 1.1 2008/01/16 07:40:54 jrmt Exp $
 */
public class MTask extends X_AD_Task
{
	/**
	 * 	Standard Constructor
	 *	@param ctx context
	 *	@param AD_Task_ID id
	 *	@param trxName trx
	 */
	public MTask (Ctx ctx, int AD_Task_ID, String trxName)
	{
		super (ctx, AD_Task_ID, trxName);
	}	//	MTask

	/**
	 * 	Load Cosntructor
	 *	@param ctx ctx
	 *	@param rs result set
	 *	@param trxName trx
	 */
	public MTask (Ctx ctx, ResultSet rs, String trxName)
	{
		super (ctx, rs, trxName);
	}	//	MTask
	
	/**	Actual Task			*/
	private Task m_task = null;
	
	/**
	 * 	Execute Task and wait
	 *	@return execution info
	 */
	public String execute()
	{
		String cmd = Msg.parseTranslation(Env.getCtx(), getOS_Command()).trim();
		if (cmd == null || cmd.equals(""))
			return "Cannot execute '" + getOS_Command() + "'";
		//
		if (isServerProcess())
			return executeRemote(cmd);
		return executeLocal(cmd);
	}	//	execute
	
	/**
	 * 	Execute Task locally and wait
	 * 	@param cmd command
	 *	@return execution info
	 */
	public String executeLocal(String cmd)
	{
		log.config(cmd);
		if (m_task != null && m_task.isAlive())
			m_task.interrupt();

		m_task = new Task(cmd);
		m_task.start();

		StringBuffer sb = new StringBuffer();
		while (true)
		{
			//  Give it a bit of time
			try
			{
				Thread.sleep(500);
			}
			catch (InterruptedException ioe)
			{
				log.log(Level.SEVERE, cmd, ioe);
			}
			//  Info to user
			sb.append(m_task.getOut())
				.append("\n-----------\n")
				.append(m_task.getErr())
				.append("\n-----------");

			//  Are we done?
			if (!m_task.isAlive())
				break;
		}
		log.config("done");
		return sb.toString();
	}	//	executeLocal
	
	/**
	 * 	Execute Task locally and wait
	 * 	@param cmd command
	 *	@return execution info
	 */
	public String executeRemote(String cmd)
	{
		log.config(cmd);
		return "Remote:\n";
	}	//	executeRemote
	
	
	/**
	 * 	String Representation
	 *	@return info
	 */
	public String toString ()
	{
		StringBuffer sb = new StringBuffer ("MTask[");
		sb.append(get_ID())
			.append("-").append(getName())
			.append(";Server=").append(isServerProcess())
			.append(";").append(getOS_Command())
			.append ("]");
		return sb.toString ();
	}	//	toString
	
}	//	MTask
