com.sun.enterprise.web.connector.grizzly.SocketChannelOutputBuffer Maven / Gradle / Ivy
The newest version!
/*
* 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.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle designates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
* "Portions Copyright [year] [name of copyright owner]"
*
* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
* only the GPL Version 2, indicate your decision by adding "[Contributor]
* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* 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
* only if the new code is made subject to such option by the copyright
* holder.
*/
package com.sun.enterprise.web.connector.grizzly;
import java.io.IOException;
import java.io.OutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.SocketChannel;
import org.apache.coyote.Response;
import org.apache.coyote.http11.InternalOutputBuffer;
/**
* Output buffer.
* Buffer the bytes until the ByteChunk is full or the request
* is completed.
*
* @author Jean-Francois Arcand
* @author 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 = MAX_BUFFERED_BYTES;
// ----------------------------------------------------------- Constructors
/**
* Alternate constructor.
*/
public SocketChannelOutputBuffer(Response response,
int headerBufferSize, boolean useSocketBuffer) {
super(response,headerBufferSize, useSocketBuffer);
if (!useSocketBuffer){
outputStream = new NIOOutputStream();
outputByteBuffer = ByteBuffer.allocate(headerBufferSize * 16);
}
}
// ------------------------------------------------------------- Properties
/**
* Set the underlying socket output stream.
*/
public void setChannel(SocketChannel socketChannel) {
this.socketChannel = socketChannel;
}
/**
* Return the underlying SocketChannel
*/
public SocketChannel getChannel(){
return socketChannel;
}
// --------------------------------------------------------- Public Methods
/**
* Send an acknoledgement without buffering.
*/
@Override
public void sendAck() throws IOException {
if (!committed)
flushChannel(ACK.slice());
}
/**
* Callback to write data from the buffer.
*/
@Override
public void realWriteBytes(byte cbuf[], int off, int len)
throws IOException {
if (len > 0) {
if (!useSocketBuffer){
int remaining = outputByteBuffer.remaining();
if (len > remaining){
if (outputByteBuffer.capacity() >= maxBufferedBytes){
outputByteBuffer.put(cbuf,off,remaining);
flush();
realWriteBytes(cbuf,off + remaining,len-remaining);
return;
} else {
int size = Math.max(outputByteBuffer.capacity() * 2,
len + outputByteBuffer.position());
ByteBuffer tmp = ByteBuffer.allocate(size);
outputByteBuffer.flip();
tmp.put(outputByteBuffer);
outputByteBuffer = tmp;
}
}
outputByteBuffer.put(cbuf, off, len);
} else {
flushChannel(ByteBuffer.wrap(cbuf,off,len));
}
}
}
/**
* Flush the buffer by looping until the ByteBuffer is empty
* @param bb the ByteBuffer to write.
*/
public void flushChannel(ByteBuffer bb) throws IOException{
OutputWriter.flushChannel(socketChannel, bb);
bb.clear();
}
/**
* Flush the buffered bytes,
*/
@Override
public void flush() throws IOException{
super.flush();
flushBuffer();
}
/**
* End request.
*
* @throws 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 (!useSocketBuffer && outputByteBuffer.position() != 0){
outputByteBuffer.flip();
flushChannel(outputByteBuffer);
outputByteBuffer.clear();
}
}
/**
* Recycle the output buffer. This should be called when closing the
* connection.
*/
@Override
public void recycle() {
response.recycle();
socketBuffer.recycle();
pos = 0;
lastActiveFilter = -1;
committed = false;
finished = false;
if (outputByteBuffer != null){
outputByteBuffer.clear();
}
socketChannel = null;
}
// ---------------------------------------------- Class helper ----------//
/**
* OutputBuffer delegating all writes to the OutputWriter
*/
private final class NIOOutputStream extends OutputStream{
@Override
public void write(byte[] b, int off, int len) throws IOException{
realWriteBytes(b,off,len);
}
public void write(int b) throws IOException {
write((byte)b);
}
public void write(byte b) throws IOException {
if(!outputByteBuffer.hasRemaining()) {
ByteBuffer tmp = ByteBuffer.allocate(
outputByteBuffer.capacity() * 2);
outputByteBuffer.flip();
tmp.put(outputByteBuffer);
outputByteBuffer = tmp;
}
outputByteBuffer.put(b);
return;
}
}
public static int getMaxBufferedBytes() {
return maxBufferedBytes;
}
public static void setMaxBufferedBytes(int aMaxBufferedBytes) {
maxBufferedBytes = aMaxBufferedBytes;
}
}