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package com.sun.grizzly.async;

import java.io.IOException;
import java.net.SocketAddress;
import java.nio.ByteBuffer;
import java.util.concurrent.Future;

/**
 * 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 Future 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 
     * AsyncWriteCallbackHandler.onIOException()
     * 
     * @param buffer {@link ByteBuffer}
     * @param callbackHandler {@link AsyncWriteCallbackHandler}, 
     *                        which will get notified, when 
     *                        {@link ByteBuffer} will be completely written
     * @throws java.io.IOException
     */
    public Future 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 
     * AsyncWriteCallbackHandler.onIOException()
     * Before data will be written on {@link SelectableChannel}, first it
     * will be passed for preprocessing to AsyncQueueDataProcessor,
     * and then preprocessor result data 
     * (AsyncQueueDataProcessor.getResultByteBuffer()) 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 AsyncQueueDataProcessor, which
     *                        will perform data processing, before it will be 
     *                        written on {@link SelectableChannel}
     * @throws java.io.IOException
     */
    public Future 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 
     * AsyncWriteCallbackHandler.onIOException()
     * Before data will be written on {@link SelectableChannel}, first it
     * will be passed for preprocessing to AsyncQueueDataProcessor,
     * and then preprocessor result data 
     * (AsyncQueueDataProcessor.getResultByteBuffer()) 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 AsyncQueueDataProcessor, 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 Future writeToAsyncQueue(ByteBuffer buffer,
            AsyncWriteCallbackHandler callbackHandler, 
            AsyncQueueDataProcessor writePreProcessor,
            ByteBufferCloner cloner) 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 Future 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 
     * AsyncWriteCallbackHandler.onIOException()
     * 
     * @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 Future 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 
     * AsyncWriteCallbackHandler.onIOException()
     * Before data will be written on {@link SelectableChannel}, first it
     * will be passed for preprocessing to AsyncQueueDataProcessor,
     * and then preprocessor result data 
     * (AsyncQueueDataProcessor.getResultByteBuffer()) 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 AsyncQueueDataProcessor, which
     *                        will perform data processing, before it will be 
     *                        written on {@link SelectableChannel}
     * @throws java.io.IOException
     */
    public Future 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 
     * AsyncWriteCallbackHandler.onIOException()
     * Before data will be written on {@link SelectableChannel}, first it
     * will be passed for preprocessing to AsyncQueueDataProcessor,
     * and then preprocessor result data 
     * (AsyncQueueDataProcessor.getResultByteBuffer()) 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 AsyncQueueDataProcessor, 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 Future writeToAsyncQueue(
            SocketAddress dstAddress, ByteBuffer buffer,
            AsyncWriteCallbackHandler callbackHandler, 
            AsyncQueueDataProcessor writePreProcessor,
            ByteBufferCloner cloner) throws IOException;
}




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