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 package com.sun.grizzly.async;

 import java.io.IOException;

 import java.net.SocketAddress;

 import java.nio.ByteBuffer;

 /**

  * Object, which is able to send {@link ByteBuffer} data asynchronously,

  * using queue.

  * 

  * @author Alexey Stashok

  */

 public interface AsyncQueueWritable {

     /**

      * Method writes {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to write {@link ByteBuffer}

      * directly (without putting to the queue).

      * If associated write queue is not empty or after direct writing 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise it will be just logged by 

      * Grizzly framework.

      * 

      * @param buffer {@link ByteBuffer}

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(ByteBuffer buffer) throws IOException;

     /**

      * Method writes {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to write {@link ByteBuffer}

      * directly (without putting to the queue).

      * If associated write queue is not empty or after direct writing 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise, if the {@link ByteBuffer} is 

      * added to a writing queue - exception notification will come via 

      * <code>AsyncWriteCallbackHandler.onIOException()</code>

      * 

      * @param buffer {@link ByteBuffer}

      * @param callbackHandler {@link AsyncWriteCallbackHandler}, 

      *                        which will get notified, when 

      *                        {@link ByteBuffer} will be completely written

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(ByteBuffer buffer, 

             AsyncWriteCallbackHandler callbackHandler) throws IOException;

     /**

      * Method writes {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to write {@link ByteBuffer}

      * directly (without putting to the queue).

      * If associated write queue is not empty or after direct writing 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise, if the {@link ByteBuffer} is 

      * added to a writing queue - exception notification will come via 

      * <code>AsyncWriteCallbackHandler.onIOException()</code>

      * Before data will be written on {@link SelectableChannel}, first it

      * will be passed for preprocessing to <code>AsyncQueueDataProcessor</code>,

      * and then preprocessor result data 

      * (<code>AsyncQueueDataProcessor.getResultByteBuffer()</code>) will be 

      * written on the {@link SelectableChannel}.

      * 

      * @param buffer {@link ByteBuffer}

      * @param callbackHandler {@link AsyncWriteCallbackHandler}, 

      *                        which will get notified, when 

      *                        {@link ByteBuffer} will be completely written

      * @param writePreProcessor <code>AsyncQueueDataProcessor</code>, which

      *                        will perform data processing, before it will be 

      *                        written on {@link SelectableChannel}

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(ByteBuffer buffer, 

             AsyncWriteCallbackHandler callbackHandler,

             AsyncQueueDataProcessor writePreProcessor) throws IOException;

     /**

      * Method writes {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to write {@link ByteBuffer}

      * directly (without putting to the queue).

      * If associated write queue is not empty or after direct writing 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise, if the {@link ByteBuffer} is 

      * added to a writing queue - exception notification will come via 

      * <code>AsyncWriteCallbackHandler.onIOException()</code>

      * Before data will be written on {@link SelectableChannel}, first it

      * will be passed for preprocessing to <code>AsyncQueueDataProcessor</code>,

      * and then preprocessor result data 

      * (<code>AsyncQueueDataProcessor.getResultByteBuffer()</code>) will be 

      * written on the {@link SelectableChannel}.

      * 

      * @param buffer {@link ByteBuffer}

      * @param callbackHandler {@link AsyncWriteCallbackHandler}, 

      *                        which will get notified, when 

      *                        {@link ByteBuffer} will be completely written

      * @param writePreProcessor <code>AsyncQueueDataProcessor</code>, which

      *                        will perform data processing, before it will be 

      *                        written on {@link SelectableChannel}

      * @param isCloneByteBuffer if true - {@link AsyncQueueWriter} 

      *                          will clone given

      *                          {@link ByteBuffer} before puting it to the 

      *                          {@link AsyncQueue}

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(ByteBuffer buffer, 

             AsyncWriteCallbackHandler callbackHandler, 

             AsyncQueueDataProcessor writePreProcessor,

             boolean isCloneByteBuffer) throws IOException;

     /**

      * Method sends {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to send {@link ByteBuffer}

      * to the given {@link SocketAddress} directly 

      * (without putting to the queue).

      * If associated write queue is not empty or after direct sending 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise it will be just logged by 

      * Grizzly framework.

      * 

      * @param dstAddress destination {@link SocketAddress} data will 

      *                   be sent to

      * @param buffer {@link ByteBuffer}

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(SocketAddress dstAddress, ByteBuffer buffer)

             throws IOException;

     /**

      * Method sends {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to send {@link ByteBuffer}

      * to the given {@link SocketAddress} directly 

      * (without putting to the queue).

      * If associated write queue is not empty or after direct sending 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise, if the {@link ByteBuffer} is 

      * added to a writing queue - exception notification will come via 

      * <code>AsyncWriteCallbackHandler.onIOException()</code>

      * 

      * @param dstAddress destination {@link SocketAddress} data will 

      *                   be sent to

      * @param buffer {@link ByteBuffer}

      * @param callbackHandler {@link AsyncWriteCallbackHandler}, 

      *                        which will get notified, when 

      *                        {@link ByteBuffer} will be completely written

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(SocketAddress dstAddress, ByteBuffer buffer, 

             AsyncWriteCallbackHandler callbackHandler) throws IOException;

     /**

      * Method sends {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to send {@link ByteBuffer}

      * to the given {@link SocketAddress} directly 

      * (without putting to the queue).

      * If associated write queue is not empty or after direct sending 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise, if the {@link ByteBuffer} is 

      * added to a writing queue - exception notification will come via 

      * <code>AsyncWriteCallbackHandler.onIOException()</code>

      * Before data will be written on {@link SelectableChannel}, first it

      * will be passed for preprocessing to <code>AsyncQueueDataProcessor</code>,

      * and then preprocessor result data 

      * (<code>AsyncQueueDataProcessor.getResultByteBuffer()</code>) will be 

      * written on the {@link SelectableChannel}.

      * 

      * @param dstAddress destination {@link SocketAddress} data will 

      *                   be sent to

      * @param buffer {@link ByteBuffer}

      * @param callbackHandler {@link AsyncWriteCallbackHandler}, 

      *                        which will get notified, when 

      *                        {@link ByteBuffer} will be completely written

      * @param writePreProcessor <code>AsyncQueueDataProcessor</code>, which

      *                        will perform data processing, before it will be 

      *                        written on {@link SelectableChannel}

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(SocketAddress dstAddress, ByteBuffer buffer, 

             AsyncWriteCallbackHandler callbackHandler,

             AsyncQueueDataProcessor writePreProcessor) throws IOException;

     /**

      * Method sends {@link ByteBuffer} using async write queue.

      * First, if write queue is empty - it tries to send {@link ByteBuffer}

      * to the given {@link SocketAddress} directly 

      * (without putting to the queue).

      * If associated write queue is not empty or after direct sending 

      * {@link ByteBuffer} still has ready data to be written - 

      * {@link ByteBuffer} will be added to {@link AsyncQueue}.

      * If an exception occurs, during direct writing - it will be propagated 

      * to the caller directly, otherwise, if the {@link ByteBuffer} is 

      * added to a writing queue - exception notification will come via 

      * <code>AsyncWriteCallbackHandler.onIOException()</code>

      * Before data will be written on {@link SelectableChannel}, first it

      * will be passed for preprocessing to <code>AsyncQueueDataProcessor</code>,

      * and then preprocessor result data 

      * (<code>AsyncQueueDataProcessor.getResultByteBuffer()</code>) will be 

      * written on the {@link SelectableChannel}.

      * 

      * @param dstAddress destination {@link SocketAddress} data will 

      *                   be sent to

      * @param buffer {@link ByteBuffer}

      * @param callbackHandler {@link AsyncWriteCallbackHandler}, 

      *                        which will get notified, when 

      *                        {@link ByteBuffer} will be completely written

      * @param writePreProcessor <code>AsyncQueueDataProcessor</code>, which

      *                        will perform data processing, before it will be 

      *                        written on {@link SelectableChannel}

      * @param isCloneByteBuffer if true - {@link AsyncQueueWriter} 

      *                          will clone given

      *                          {@link ByteBuffer} before puting it to the 

      *                          {@link AsyncQueue}

      * @throws java.io.IOException

      */

     public void writeToAsyncQueue(SocketAddress dstAddress, ByteBuffer buffer, 

             AsyncWriteCallbackHandler callbackHandler, 

             AsyncQueueDataProcessor writePreProcessor,

             boolean isCloneByteBuffer) throws IOException;

 }