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  /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   *
   * Copyright (c) 1997-2010 Oracle and/or its affiliates. All rights reserved.
   *
   * The contents of this file are subject to the terms of either the GNU
   * General Public License Version 2 only ("GPL") or the Common Development
   * and Distribution License("CDDL") (collectively, the "License").  You
   * may not use this file except in compliance with the License.  You can
  * obtain a copy of the License at
  * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
  * or packager/legal/LICENSE.txt.  See the License for the specific
  * language governing permissions and limitations under the License.
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  * exception as provided by Oracle in the GPL Version 2 section of the License
  * file that accompanied this code.
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  * Modifications:
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  * its licensees as provided above.  However, if you add GPL Version 2 code
  * and therefore, elected the GPL Version 2 license, then the option applies
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  * holder.
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 package com.sun.enterprise.web.connector.grizzly;
 
Output buffer. Buffer the bytes until the ByteChunk is full or the request is completed.

Author(s):
Jean-Francois Arcand
Scott Oaks
 
 public class SocketChannelOutputBuffer extends InternalOutputBuffer{

    
Underlying output socketChannel.
 
     protected SocketChannel socketChannel;
    
    
    
Underlying ByteByteBuffer
 
     private ByteBuffer outputByteBuffer;

    
    
ACK static bytes.
 
     private final static ByteBuffer ACK = 
             ByteBuffer.wrap("HTTP/1.1 100 Continue\r\n\r\n".getBytes());
    
    
    
    
Maximum cached bytes before flushing.
 
     private final static int MAX_BUFFERED_BYTES = 32 * 8192;
    
    
    
Default max cached bytes.
 
     private static int maxBufferedBytes = ;
     
     
     // ----------------------------------------------------------- Constructors
     

    
Alternate constructor.
 
     public SocketChannelOutputBuffer(Response response
             int headerBufferSizeboolean useSocketBuffer) {
        super(response,headerBufferSizeuseSocketBuffer); 
        
        if (!useSocketBuffer){
             = new NIOOutputStream();
             = ByteBuffer.allocate(headerBufferSize * 16);
        }  
    }
    
    // ------------------------------------------------------------- Properties


    
Set the underlying socket output stream.
    public void setChannel(SocketChannel socketChannel) {
        this. = socketChannel;
    }

    
    
Return the underlying SocketChannel
    public SocketChannel getChannel(){
        return ;
    }
    
    // --------------------------------------------------------- Public Methods

    
Send an acknoledgement without buffering.
    @Override
    public void sendAck() throws IOException {
        if (!)
            flushChannel(.slice());
    }
    
    
    
Callback to write data from the buffer.
    @Override
    public void realWriteBytes(byte cbuf[], int offint len)
        throws IOException {
        if (len > 0) {
            if (!){
                int remaining = .remaining();
                if (len > remaining){                
                    if (.capacity() >= ){
                        .put(cbuf,off,remaining);
                        flush();
                        realWriteBytes(cbuf,off + remaining,len-remaining);
                        return;
                    } else {                
                        int size = Math.max(.capacity() * 2,
                                            len + .position());
                        ByteBuffer tmp = ByteBuffer.allocate(size);
                        .flip();
                        tmp.put();
                         = tmp;
                    }
                }
                .put(cbufofflen);
            } else {
                flushChannel(ByteBuffer.wrap(cbuf,off,len));
            }
        }
    }
    
    
    
Flush the buffer by looping until the ByteBuffer is empty

Parameters:
bb the ByteBuffer to write.
   
    public void flushChannel(ByteBuffer bbthrows IOException{
        OutputWriter.flushChannel(bb);
        bb.clear();
    }
    
    
    
Flush the buffered bytes,
    @Override
    public void flush() throws IOException{
        super.flush();
        flushBuffer();
    }
    
    
     
End request.

Throws:
java.io.IOException an undelying I/O error occured
    @Override
    public void endRequest()
        throws IOException {
        super.endRequest();
        flushBuffer();
    }  
    
    
Writes bytes to the underlying socketChannel.
    public void flushBuffer() throws IOException{
        if (! && .position() != 0){
            .flip();
            flushChannel();
            .clear();
        }
    }

    
    
Recycle the output buffer. This should be called when closing the connection.
    @Override
    public void recycle() {        
        .recycle();
        .recycle();
         = 0;
         = -1;
         = false;
         = false;
        if ( != null){
            .clear();
        }
         = null;
    }
    
    
    // ---------------------------------------------- Class helper ----------//
    
    
OutputBuffer delegating all writes to the OutputWriter
    private final class NIOOutputStream extends OutputStream{   
        
        @Override
        public void write(byte[] bint offint lenthrows IOException{           
            realWriteBytes(b,off,len);
        }
        
        public void write(int bthrows IOException {
            write((byte)b);
        }
        
        public void write(byte bthrows IOException {
            if(!.hasRemaining()) {
                ByteBuffer tmp = ByteBuffer.allocate(
                        .capacity() * 2);
                .flip();
                tmp.put();
                 = tmp;
            }
            .put(b);
            return;
        }
    }
    
    public static int getMaxBufferedBytes() {
        return ;
    }
    
    public static void setMaxBufferedBytes(int aMaxBufferedBytes) {
         = aMaxBufferedBytes;
    }
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