FileOutputBuffer.java

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package com.sun.grizzly.tcp;

import java.io.IOException;
import java.nio.channels.FileChannel;

/**
 * Simple marker class for supporting OS level send-file functionality.
 * @author oleksiys
 */
public interface FileOutputBuffer{
    /**
     * Returns <tt>true</tt>, if {@link OutputBuffer} supports file-send mode,
     *         or <tt>false</tt> otherwise.
     * @return <tt>true</tt>, if {@link OutputBuffer} supports file-send mode,
     *         or <tt>false</tt> otherwise.
     */
    public boolean isSupportFileSend();

    /**
     * Transfers data from file channel to the socket channel directly.
     *
     * @param fileChannel {@link FileChannel}
     * @param position The position within the file at which the transfer is
     *                 to begin; must be non-negative
     * @param length The maximum number of bytes to be transferred;
     *                 must be non-negative
     * @return number of bytes tranferred
     * @throws java.io.IOException
     */
    public long sendFile(FileChannel fileChannel, long position, long length)
            throws IOException;
}