/*
* Copyright (C) 2009 eXo Platform SAS.
*
* This is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation; either version 2.1 of
* the License, or (at your option) any later version.
*
* This software 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.exoplatform.services.ftp.data;
import org.exoplatform.services.log.ExoLogger;
import org.exoplatform.services.log.Log;
import java.io.IOException;
import java.io.OutputStream;
/**
* Created by The eXo Platform SAS Author : Vitaly Guly gavrik-vetal@ukr.net/mail.ru
*
* @version $Id: $
*/
public class FtpSlowOutputStream extends OutputStream
{
private static final Log LOG = ExoLogger.getLogger("exo.jcr.component.ftp.FtpSlowOutputStream");
private OutputStream nativeOutputStream;
private int blockSize;
private int writed = 0;
public FtpSlowOutputStream(OutputStream nativeOutputStream, int bytesPerSec)
{
this.nativeOutputStream = nativeOutputStream;
blockSize = bytesPerSec / 10;
}
protected void tryWaiting()
{
if (writed >= blockSize)
{
try
{
Thread.sleep(100);
}
catch (Exception exc)
{
LOG.info("Unhandled exception. " + exc.getMessage(), exc);
}
writed = 0;
}
}
public void write(int dataByte) throws IOException
{
tryWaiting();
nativeOutputStream.write(dataByte);
writed++;
}
public void write(byte[] dataBytes) throws IOException
{
write(dataBytes, 0, dataBytes.length);
}
public void write(byte[] dataBytes, int offset, int len) throws IOException
{
int allWrited = 0;
int curOffset = offset;
while (allWrited < len)
{
tryWaiting();
int curBlockSize = blockSize - writed;
if ((curBlockSize + allWrited) > len)
{
curBlockSize = len - allWrited;
}
nativeOutputStream.write(dataBytes, curOffset, curBlockSize);
allWrited += curBlockSize;
writed += curBlockSize;
curOffset += curBlockSize;
}
}
public void flush() throws IOException
{
nativeOutputStream.flush();
}
public void close() throws IOException
{
nativeOutputStream.close();
}
}