/*
 * Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
 *
 * This file is part of Resin(R) Open Source
 *
 * Each copy or derived work must preserve the copyright notice and this
 * notice unmodified.
 *
 * Resin Open Source is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Resin Open Source 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, or any warranty
 * of NON-INFRINGEMENT.  See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Resin Open Source; if not, write to the
 *
 *   Free Software Foundation, Inc.
 *   59 Temple Place, Suite 330
 *   Boston, MA 02111-1307  USA
 *
 * @author Scott Ferguson
 */

package com.caucho.server.fastcgi;

import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;

import com.caucho.server.http.ResponseStream;
import com.caucho.vfs.WriteStream;

public class FastCgiResponseStream extends ResponseStream {
  private static final Logger log
    = Logger.getLogger(FastCgiResponseStream.class.getName());

  private FastCgiRequest _request;
  private WriteStream _next;

  FastCgiResponseStream(FastCgiRequest request,
                        FastCgiResponse response,
                        WriteStream next)
  {
    super(response);

    _request = request;
    _next = next;
  }
  
  @Override
  public void start()
  {
    super.start();
  }
  
  //
  // implementations
  //

  @Override
  protected byte []getNextBuffer()
  {
    return _next.getBuffer();
  }
      
  @Override
  protected int getNextBufferOffset()
    throws IOException
  {
    return _next.getBufferOffset();
  }
  
  @Override
  protected void setNextBufferOffsetImpl(int offset)
  {
    _next.setBufferOffset(offset);
  }

  @Override
  protected byte []writeNextBufferImpl(int offset)
    throws IOException
  {
    if (log.isLoggable(Level.FINE))
      log.fine(dbgId() + "write-chunk(" + offset + ")");

    return _next.nextBuffer(offset);
  }

  @Override
  protected void flushNextImpl()
    throws IOException
  {
    if (log.isLoggable(Level.FINE))
      log.fine(dbgId() + "flush()");

    _next.flush();
  }

  @Override
  protected void closeNextImpl()
    throws IOException
  {
    if (log.isLoggable(Level.FINE))
      log.fine(dbgId() + "flush()");

    _next.flush();
  }

  @Override
  protected void writeTailImpl(boolean isClose)
    throws IOException
  {
    flushBuffer();
    
    _request.writeTail();
  }
}