iofuture.java

mina是以Java实现的一个开源的网络程序框架

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 *  Licensed to the Apache Software Foundation (ASF) under one
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 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
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package org.apache.mina.core.future;

import java.util.concurrent.TimeUnit;

import org.apache.mina.core.session.IoSession;

/**
 * Represents the completion of an asynchronous I/O operation on an 
 * {@link IoSession}.
 * Can be listened for completion using a {@link IoFutureListener}.
 * 
 * @author The Apache MINA Project ([e-mail])
 * @version $Rev:671827 $, $Date:2008-06-26 09:49:48 +0100 (jeu., 26 juin 2008) $
 */
public interface IoFuture {
	
    /**
     * Returns the {@link IoSession} which is associated with this future.
     */
    IoSession getSession();

    /**
     * Wait for the asynchronous operation to complete.
     * The attached listeners will be notified when the operation is 
     * completed.
     */
    IoFuture await() throws InterruptedException;

    /**
     * Wait for the asynchronous operation to complete with the specified timeout.
     *
     * @return <tt>true</tt> if the operation is completed.
     */
    boolean await(long timeout, TimeUnit unit) throws InterruptedException;

    /**
     * Wait for the asynchronous operation to complete with the specified timeout.
     *
     * @return <tt>true</tt> if the operation is completed.
     */
    boolean await(long timeoutMillis) throws InterruptedException;

    /**
     * Wait for the asynchronous operation to complete uninterruptibly.
     * The attached listeners will be notified when the operation is 
     * completed.
     * 
     * @return the current IoFuture
     */
    IoFuture awaitUninterruptibly();

    /**
     * Wait for the asynchronous operation to complete with the specified timeout
     * uninterruptibly.
     *
     * @return <tt>true</tt> if the operation is completed.
     */
    boolean awaitUninterruptibly(long timeout, TimeUnit unit);

    /**
     * Wait for the asynchronous operation to complete with the specified timeout
     * uninterruptibly.
     *
     * @return <tt>true</tt> if the operation is finished.
     */
    boolean awaitUninterruptibly(long timeoutMillis);

    /**
     * @deprecated Replaced with {@link #awaitUninterruptibly()}.
     */
    @Deprecated
    void join();

    /**
     * @deprecated Replaced with {@link #awaitUninterruptibly(long)}.
     */
    @Deprecated
    boolean join(long timeoutMillis);

    /**
     * Returns if the asynchronous operation is completed.
     */
    boolean isDone();

    /**
     * Adds an event <tt>listener</tt> which is notified when
     * this future is completed. If the listener is added
     * after the completion, the listener is directly notified.
     */
    IoFuture addListener(IoFutureListener<?> listener);

    /**
     * Removes an existing event <tt>listener</tt> so it won't be notified when
     * the future is completed.
     */
    IoFuture removeListener(IoFutureListener<?> listener);
}