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  /*
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   * 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
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 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 nWrite = 0;
         int len = -1;
         long elapsedTime = 0;
         try {
             while ( bb.hasRemaining() ) {
                 len = socketChannel.write(bb);
                 if (len > 0){
                     attempts = 0;
                     elapsedTime = 0;
                    nWrite += len;
                } else {
                    attempts++;
                    if (writeSelector == null) {
                        writeSelector = SelectorFactory.getSelector();
                        if (writeSelector == null) {
                            // Continue using the main one.
                            continue;
                        }
                        key = socketChannel.register(writeSelector,
                                .);
                    } else {
                        writeSelector.selectedKeys().clear();
                    }
                    long startTime = System.currentTimeMillis();
                    if (writeSelector.select(writeTimeout) == 0) {
                        elapsedTime += (System.currentTimeMillis() - startTime);
                        if (attempts > 2 && ( writeTimeout > 0 && elapsedTime >= writeTimeout ) )
                            throw new IOException("Client is busy or timed out");
                    }
                }
            }
        } finally {
            if (key != null) {
                key.cancel();
                key = null;
            }
            if ( writeSelector != null ) {
                // Cancel the key.
                SelectorFactory.selectNowAndReturnSelector(writeSelector);
            }
        }
        return nWrite;
    }  
    
    
    
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;
        long totalBytes = 0;
        for (int i=0;i<bb.length;i++) {
            totalBytes += bb[i].remaining();
        }
        long nWrite = 0;
        long len = -1;
        long elapsedTime = 0;
        try {
            while (nWrite < totalBytes ) {
                len = socketChannel.write(bb);
                if (len > 0){
                    attempts = 0;
                    elapsedTime = 0;
                    nWrite += len;
                } else {
                    if (writeSelector == null) {
                        writeSelector = SelectorFactory.getSelector();
                        if (writeSelector == null) {
                            // Continue using the main one.
                            continue;
                        }
                    } else {
                        writeSelector.selectedKeys().clear();
                    }
                    key = socketChannel.register(writeSelector,
                                                 .);
                    long startTime = System.currentTimeMillis();
                    if (writeSelector.select(writeTimeout) == 0) {
                        elapsedTime += (System.currentTimeMillis() - startTime);
                        if (attempts > 2 && ( writeTimeout > 0 && elapsedTime >= writeTimeout ) )
                            throw new IOException("Client is busy or timed out");
                    }
                }
            }
        } finally {
            if (key != null) {
                key.cancel();
                key = null;
            }
            if ( writeSelector != null ) {
                // Cancel the key.
                SelectorFactory.selectNowAndReturnSelector(writeSelector);
            }
        }
        
        return nWrite;
    }  
    
    public static int getDefaultWriteTimeout() {
        return ;
    }
    
    public static void setDefaultWriteTimeout(int aDefaultWriteTimeout) {
         = aDefaultWriteTimeout;
    }
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