org.eclipse.jetty.io.SimpleBuffers Maven / Gradle / Ivy
//
// ========================================================================
// Copyright (c) 1995-2012 Mort Bay Consulting Pty. Ltd.
// ------------------------------------------------------------------------
// All rights reserved. This program and the accompanying materials
// are made available under the terms of the Eclipse Public License v1.0
// and Apache License v2.0 which accompanies this distribution.
//
// The Eclipse Public License is available at
// http://www.eclipse.org/legal/epl-v10.html
//
// The Apache License v2.0 is available at
// http://www.opensource.org/licenses/apache2.0.php
//
// You may elect to redistribute this code under either of these licenses.
// ========================================================================
//
package org.eclipse.jetty.io;
/* ------------------------------------------------------------ */
/** SimpleBuffers.
* Simple implementation of Buffers holder.
*
*
*/
public class SimpleBuffers implements Buffers
{
final Buffer _header;
final Buffer _buffer;
boolean _headerOut;
boolean _bufferOut;
/* ------------------------------------------------------------ */
/**
*
*/
public SimpleBuffers(Buffer header, Buffer buffer)
{
_header=header;
_buffer=buffer;
}
/* ------------------------------------------------------------ */
public Buffer getBuffer()
{
synchronized(this)
{
if (_buffer!=null && !_bufferOut)
{
_bufferOut=true;
return _buffer;
}
if (_buffer!=null && _header!=null && _header.capacity()==_buffer.capacity() && !_headerOut)
{
_headerOut=true;
return _header;
}
if (_buffer!=null)
return new ByteArrayBuffer(_buffer.capacity());
return new ByteArrayBuffer(4096);
}
}
/* ------------------------------------------------------------ */
public Buffer getHeader()
{
synchronized(this)
{
if (_header!=null && !_headerOut)
{
_headerOut=true;
return _header;
}
if (_buffer!=null && _header!=null && _header.capacity()==_buffer.capacity() && !_bufferOut)
{
_bufferOut=true;
return _buffer;
}
if (_header!=null)
return new ByteArrayBuffer(_header.capacity());
return new ByteArrayBuffer(4096);
}
}
/* ------------------------------------------------------------ */
public Buffer getBuffer(int size)
{
synchronized(this)
{
if (_header!=null && _header.capacity()==size)
return getHeader();
if (_buffer!=null && _buffer.capacity()==size)
return getBuffer();
return null;
}
}
/* ------------------------------------------------------------ */
public void returnBuffer(Buffer buffer)
{
synchronized(this)
{
buffer.clear();
if (buffer==_header)
_headerOut=false;
if (buffer==_buffer)
_bufferOut=false;
}
}
}