FTPClientPool.java

/**
 * This file Copyright (c) 2005-2010 Aptana, Inc. This program is
 * dual-licensed under both the Aptana Public License and the GNU General
 * Public license. You may elect to use one or the other of these licenses.
 * 
 * This program is distributed in the hope that it will be useful, but
 * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
 * NONINFRINGEMENT. Redistribution, except as permitted by whichever of
 * the GPL or APL you select, is prohibited.
 *
 * 1. For the GPL license (GPL), you can redistribute and/or modify this
 * program under the terms of the GNU General Public License,
 * Version 3, as published by the Free Software Foundation.  You should
 * have received a copy of the GNU General Public License, Version 3 along
 * with this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 * 
 * Aptana provides a special exception to allow redistribution of this file
 * with certain other free and open source software ("FOSS") code and certain additional terms
 * pursuant to Section 7 of the GPL. You may view the exception and these
 * terms on the web at http://www.aptana.com/legal/gpl/.
 * 
 * 2. For the Aptana Public License (APL), this program and the
 * accompanying materials are made available under the terms of the APL
 * v1.0 which accompanies this distribution, and is available at
 * http://www.aptana.com/legal/apl/.
 * 
 * You may view the GPL, Aptana's exception and additional terms, and the
 * APL in the file titled license.html at the root of the corresponding
 * plugin containing this source file.
 * 
 * Any modifications to this file must keep this entire header intact.
 */

package com.aptana.ide.filesystem.ftp;

import com.aptana.ide.core.KeepAliveObjectPool;
import com.enterprisedt.net.ftp.FTPClient;
import com.enterprisedt.net.ftp.FTPClientInterface;

public class FTPClientPool extends KeepAliveObjectPool<FTPClientInterface>
{

	private IPoolConnectionManager manager;

	public FTPClientPool(IPoolConnectionManager manager)
	{
		this.manager = manager;
	}

	public FTPClientInterface create()
	{
		return manager.newClient();
	}

	public void expire(FTPClientInterface ftpClient)
	{
		if (ftpClient == null)
		{
			return;
		}
		try
		{
			ftpClient.quit();
		}
		catch (Exception e)
		{
			try
			{
				ftpClient.quitImmediately();
			}
			catch (Exception ignore)
			{
			}
		}
	}

	public boolean validate(FTPClientInterface o)
	{
		if (!o.connected())
		{
			return false;
		}
		if (o instanceof FTPClient)
		{
			try
			{
				((FTPClient) o).noOperation();
			}
			catch (Exception e)
			{
				// ignore
				return false;
			}
		}
		return true;
	}
}