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 package com.sun.grizzly.async;

 import com.sun.grizzly.SelectorHandler;

 import java.io.IOException;

 import java.nio.ByteBuffer;

 import java.nio.channels.WritableByteChannel;

 import java.net.SocketAddress;

 import java.nio.channels.DatagramChannel;

 /**

  * UDP implementation of {@link AsyncQueueWriter}

  *

  * @author Alexey Stashok

  */

 public class UDPAsyncQueueWriter extends AbstractAsyncQueueWriter {

     public UDPAsyncQueueWriter(SelectorHandler selectorHandler) {

         super(selectorHandler);

     }

     protected void doWrite(WritableByteChannel channel, SocketAddress dstAddress,

             ByteBuffer byteBuffer) throws IOException {

         int lastWriteBytes = 0;

         do {

             if (dstAddress != null) {

                 lastWriteBytes = ((DatagramChannel) channel).send(byteBuffer, dstAddress);

             } else {

                 lastWriteBytes = channel.write(byteBuffer);

             }

         } while(lastWriteBytes > 0 && byteBuffer.hasRemaining());

     }    

 }