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//========================================================================
//Copyright 2004-2008 Mort Bay Consulting Pty. Ltd.
//------------------------------------------------------------------------
//Licensed under the Apache License, Version 2.0 (the "License");
//you may not use this file except in compliance with the License.
//You may obtain a copy of the License at 
//http://www.apache.org/licenses/LICENSE-2.0
//Unless required by applicable law or agreed to in writing, software
//distributed under the License is distributed on an "AS IS" BASIS,
//WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//See the License for the specific language governing permissions and
//limitations under the License.
//========================================================================

package org.mortbay.jetty;

import java.util.ArrayList;

import org.mortbay.component.AbstractLifeCycle;
import org.mortbay.io.Buffer;
import org.mortbay.io.Buffers;

/* ------------------------------------------------------------ */
/** Abstract Buffer pool.
 * simple unbounded pool of buffers.
 * @author gregw
 *
 */
public abstract class AbstractBuffers extends AbstractLifeCycle implements Buffers
{
    private int _headerBufferSize=4*1024;
    private int _requestBufferSize=8*1024;
    private int _responseBufferSize=24*1024;

    final static private int __HEADER=0;
    final static private int __REQUEST=1;
    final static private int __RESPONSE=2;
    final static private int __OTHER=3;
    final private int[] _pool={2,1,1,2};

    private final ThreadLocal _buffers=new ThreadLocal()
    {
        protected Object initialValue()
        {
            return new ThreadBuffers(_pool[__HEADER],_pool[__REQUEST],_pool[__RESPONSE],_pool[__OTHER]);
        }
    };
   
    public AbstractBuffers()
    {
        super();
    }



    public Buffer getBuffer(final int size )
    {
        final int set = (size==_headerBufferSize)?__HEADER
                :(size==_responseBufferSize)?__RESPONSE
                        :(size==_requestBufferSize)?__REQUEST:__OTHER;

        final ThreadBuffers thread_buffers = (ThreadBuffers)_buffers.get();

        final Buffer[] buffers=thread_buffers._buffers[set];
        for (int i=0;i