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  /*
   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
   * 
   * Copyright 1997-2007 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]"
  * 
  * 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;
 
NIO utility to flush ByteBuffer

Author(s):
Scott Oaks
 
 public class OutputWriter {
    
    
The default rime out before closing the connection
 
     private static int defaultWriteTimeout = 30000;
    
    
    
Flush the buffer by looping until the ByteBuffer is empty

Parameters:
bb the ByteBuffer to write.
    
     public static long flushChannel(SocketChannel socketChannelByteBuffer bb)
             throws IOException{
         return flushChannel(socketChannel,bb,);
     }
       
    
    
Flush the buffer by looping until the ByteBuffer is empty

Parameters:
bb the ByteBuffer to write.
    
     public static long flushChannel(SocketChannel socketChannel
             ByteBuffer bblong writeTimeoutthrows IOException{    
         
         if (bb == null || socketChannel == null){
             if (SelectorThread.logger().isLoggable(.)){
                 SelectorThread.logger().log(.,"Invalid Response State " + bb
                        + "SocketChannel cannot be null." + socketChannel);
             }
             return -1;
         }  
 
         SelectionKey key = null;
         Selector writeSelector = null;
         int attempts = 0;
         int bytesProduced = 0;
         try {
             while ( bb.hasRemaining() ) {
                 int len = socketChannel.write(bb);
                 attempts++;
                 if (len < 0){
                     throw new EOFException();
                 } 
             
                 bytesProduced += len;
                 
                 if (len == 0) {
                    if ( writeSelector == null ){
                        writeSelector = SelectorFactory.getSelector();
                        if ( writeSelector == null){
                            // Continue using the main one.
                            continue;
                        }
                    }
                    
                    key = socketChannel.register(writeSelector.);
                    
                    if (writeSelector.select(writeTimeout) == 0) {
                        if (attempts > 2)
                            throw new IOException("Client disconnected");
                    } else {
                        attempts--;
                    }
                } else {
                    attempts = 0;
                }
            }   
        } finally {
            if (key != null) {
                key.cancel();
                key = null;
            }
            
            if ( writeSelector != null ) {
                // Cancel the key.
                SelectorFactory.selectNowAndReturnSelector(writeSelector);
            }
        }
        return bytesProduced;
    }  
    
    
    
Flush the buffer by looping until the ByteBuffer is empty

Parameters:
bb the ByteBuffer to write.
   
    public static long flushChannel(SocketChannel socketChannelByteBuffer[] bb)
            throws IOException{
        return flushChannel(socketChannel,bb,);
    }    
     
    
    
Flush the buffer by looping until the ByteBuffer is empty

Parameters:
bb the ByteBuffer to write.
   
    public static long flushChannel(SocketChannel socketChannel,
            ByteBuffer[] bblong writeTimeoutthrows IOException{
      
        if (bb == null){
            throw new IllegalStateException("Invalid Response State. ByteBuffer" 
                    + " cannot be null.");
        }
        
        if (socketChannel == null){
            throw new IllegalStateException("Invalid Response State. " +
                    "SocketChannel cannot be null.");
        }   
        
        SelectionKey key = null;
        Selector writeSelector = null;
        int attempts = 0;
        long totalBytes = 0;
        for (ByteBuffer aBb : bb) {
            totalBytes += aBb.remaining();
        }
        
        long byteProduced = 0;
        try {
            while (byteProduced < totalBytes ) {
                long len = socketChannel.write(bb);
                attempts++;
                byteProduced += len;
                if (len < 0){
                    throw new EOFException();
                } 
            
                if (len == 0) {
                    if ( writeSelector == null ){
                        writeSelector = SelectorFactory.getSelector();
                        if ( writeSelector == null){
                            // Continue using the main one.
                            continue;
                        }
                    }
                    
                    key = socketChannel.register(writeSelector.);
                    
                    if (writeSelector.select(writeTimeout) == 0) {
                        if (attempts > 2)
                            throw new IOException("Client disconnected");
                    } else {
                        attempts--;
                    }
                } else {
                    attempts = 0;
                }
            }   
        } finally {
            if (key != null) {
                key.cancel();
                key = null;
            }
            
            if ( writeSelector != null ) {
                // Cancel the key.
                SelectorFactory.selectNowAndReturnSelector(writeSelector);
            }
        }
        return byteProduced;
    }  
    
    public static int getDefaultWriteTimeout() {
        return ;
    }
    
    public static void setDefaultWriteTimeout(int aDefaultWriteTimeout) {
         = aDefaultWriteTimeout;
    }
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