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*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright 2007-2009 Sun Microsystems, Inc. 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.html
* or glassfish/bootstrap/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 glassfish/bootstrap/legal/LICENSE.txt.
* Sun designates this particular file as subject to the "Classpath" exception
* as provided by Sun in the GPL Version 2 section of the License file that
* accompanied this code. If applicable, add the following below the License
* Header, with the fields enclosed by brackets [] replaced by your own
* identifying information: "Portions Copyrighted [year]
* [name of copyright owner]"
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*
* 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
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* its licensees as provided above. However, if you add GPL Version 2 code
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*/
package com.sun.grizzly.websocket;
import com.sun.grizzly.util.LoggerUtils;
import com.sun.grizzly.websocket.WebSocketImpl.IOExceptionWrap;
import java.io.IOException;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.nio.channels.SelectionKey;
import java.nio.channels.SocketChannel;
import java.util.ArrayList;
import java.util.List;
import java.util.logging.Logger;
/**
*
* @author gustav trede
*/
public class TCPIOhandler{
protected final static Logger logger = LoggerUtils.getLogger();
private final List handshakers = new ArrayList(2);
protected final SocketChannel channel;
protected SelectThread selthread;
protected SelectionKey key;
protected int keyInterest;
private boolean notpendingconnection;
protected SelectorLogicHandler selectLogicHandler;
/**
*
* @param addr
* @throws IOException
*/
public TCPIOhandler(SocketAddress addr) throws IOException{
this(connectAsync(addr));
}
/**
*
* @param channel
*/
public TCPIOhandler(SocketChannel channel) {
if (channel == null){
throw new IllegalArgumentException("channel is null");
}
this.channel = channel;
this.notpendingconnection = !channel.isConnectionPending();
}
/**
*
* @param addr
* @return
* @throws IOException
*/
protected final static SocketChannel connectAsync(SocketAddress addr)
throws IOException{
SocketChannel ch = null;
try{
ch = SocketChannel.open();
ch.configureBlocking(false);
ch.connect(addr);
return ch;
}catch(Throwable t) {
try{
if (ch != null){
ch.close();
}
}catch(IOException ie) { }
throw (t instanceof IOException)?(IOException)t:new IOExceptionWrap(t);
}
}
/**
*
* @param att
* @param selthread
* @throws IOException
*/
public void enteredSelectThread(SelectorLogicHandler att,
SelectThread selthread) throws IOException {
this.selectLogicHandler = att;
this.selthread = selthread;
}
/**
*
* @param hs
*/
public final void addHandshaker(Handshaker hs) {
handshakers.add(hs);
}
/**
*
* @param buff
* @return
* @throws Exception
*/
public final boolean doHandshakeChain(ByteBuffer buff) throws Exception {
if (notpendingconnection || finishConnect()){
/* int sr = 64;
int rb = 16384;
if (channel.socket().getSendBufferSize()!=sr)
channel.socket().setSendBufferSize(sr);
//channel.socket().setReceiveBufferSize(rb);
if (channel.socket().getSendBufferSize()!=sr)
System.err.println(channel.socket().getSendBufferSize());
//if (channel.socket().getReceiveBufferSize()!=rb)
// System.err.println(channel.socket().getReceiveBufferSize());
*/
while(!handshakers.isEmpty()){
if (!handshakers.get(0).doHandshake(buff)){
return false;
}
handshakers.remove(0);
}
return true;
}
return false;
}
/**
* First call is for unregistered channel, checking for finished connection
* to save the cost of a kater key interest change.
* Second call and not connected means OP_CONNECT failed.
* @throws IOException
*/
private boolean finishConnect() throws IOException{
if (channel.finishConnect()){
return notpendingconnection = true;
}
if (key == null){
initialInterest(SelectionKey.OP_CONNECT);
return false;
}
throw new IOException("SocketChannel.finishConnect() returned false");
}
/**
* Sets the SelectionKey interest during handshake phase, key can be null
* until the first {@link Handshaker#doHandshake} method call completes.
* @param interest
* @return
* @throws IOException
*/
public final boolean initialInterest(int interest) throws IOException{
boolean changed = keyInterest != interest;
if (changed){
keyInterest = interest;
if (key != null){
key.interestOps(interest);
return changed;
}
key = selthread.register(channel,interest,selectLogicHandler);
}
return changed;
}
/**
*
* @param interest
*/
public final void addKeyInterest(int interest){
key.interestOps(keyInterest|=interest);
}
/**
*
* @param interest
*/
public final void removeKeyInterest(int interest){
key.interestOps(keyInterest&=~interest);
}
/**
*
* @param interest
*/
public final void setKeyInterest(int interest){
key.interestOps(keyInterest=interest);
}
/**
*
* @param buff
* @return
* @throws IOException
*/
public int read(ByteBuffer buffer) throws IOException{
int read = channel.read(buffer);
if (read <= 0){
//if reads are disabled buffer can be full for a read ready key.
if (read == -1 || (keyInterest & SelectionKey.OP_READ) == 0)
throw otherpeerclosed;
throw new RuntimeException(
"Likely a bug, channel.read returned 0 for "+buffer);
}
return read;
}
/**
* Returns true if all data was written.
* Returns false if buffer still has remaining data.
* @param buffer
* @return
* @throws IOException
*/
public boolean write(ByteBuffer buffer) throws IOException{
channel.write(buffer);
return buffer.remaining() == 0;
}
public final void writeInterestTaskOffer(){
selthread.offerTask(writeinterester);
}
private final Runnable writeinterester = new Runnable() {
public void run() {
try{
key.interestOps(keyInterest|=SelectionKey.OP_WRITE);
}catch(Throwable t){
selectLogicHandler.close(t);
}
}
};
/**
*
* @throws IOException
*/
public void close() throws IOException{
try {
// selthread.socketCount.decrementAndGet();
}finally{
channel.close();
}
}
@Override
public String toString() {
return getClass().getSimpleName()+
(selthread!=null?" "+selthread:"")+
" "+channel!=null?(channel+" channel.isOpen: "+channel.isOpen()):""+
" currentKeyInterest: "+keyInterest+
key!=null?((!key.isValid()?" key.isValid: false":
" key.interestOps: "+key.interestOps()+
" key.readyOps: "+key.readyOps())):""
;
}
protected final static IOException otherpeerclosed =
new IOException("Other peer closed the connection."){
@Override
public Throwable fillInStackTrace() { return this; }
};
}
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