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The Netty project is an effort to provide an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package org.jboss.netty.channel;

import org.jboss.netty.logging.InternalLogger;
import org.jboss.netty.logging.InternalLoggerFactory;

import java.util.concurrent.TimeUnit;

/**
 * A skeletal {@link ChannelFuture} implementation which represents a
 * {@link ChannelFuture} which has been completed already.
 */
public abstract class CompleteChannelFuture implements ChannelFuture {

    private static final InternalLogger logger =
        InternalLoggerFactory.getInstance(CompleteChannelFuture.class);

    private final Channel channel;

    /**
     * Creates a new instance.
     *
     * @param channel the {@link Channel} associated with this future
     */
    protected CompleteChannelFuture(Channel channel) {
        if (channel == null) {
            throw new NullPointerException("channel");
        }
        this.channel = channel;
    }

    public void addListener(ChannelFutureListener listener) {
        try {
            listener.operationComplete(this);
        } catch (Throwable t) {
            if (logger.isWarnEnabled()) {
                logger.warn(
                        "An exception was thrown by " +
                        ChannelFutureListener.class.getSimpleName() + '.', t);
            }
        }
    }

    public void removeListener(ChannelFutureListener listener) {
        // NOOP
    }

    public ChannelFuture await() throws InterruptedException {
        if (Thread.interrupted()) {
            throw new InterruptedException();
        }
        return this;
    }

    public boolean await(long timeout, TimeUnit unit) throws InterruptedException {
        if (Thread.interrupted()) {
            throw new InterruptedException();
        }
        return true;
    }

    public boolean await(long timeoutMillis) throws InterruptedException {
        if (Thread.interrupted()) {
            throw new InterruptedException();
        }
        return true;
    }

    public ChannelFuture awaitUninterruptibly() {
        return this;
    }

    public boolean awaitUninterruptibly(long timeout, TimeUnit unit) {
        return true;
    }

    public boolean awaitUninterruptibly(long timeoutMillis) {
        return true;
    }

    public Channel getChannel() {
        return channel;
    }

    public boolean isDone() {
        return true;
    }

    public boolean setProgress(long amount, long current, long total) {
        return false;
    }

    public boolean setFailure(Throwable cause) {
        return false;
    }

    public boolean setSuccess() {
        return false;
    }

    public boolean cancel() {
        return false;
    }

    public boolean isCancelled() {
        return false;
    }
}