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KitchenSync-core - A Java Library for Distributed Communication
/*
* KitchenSync-core Java Library Copyright (C) 2014 Burton Alexander
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc., 51
* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
package com.github.mrstampy.kitchensync.stream;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.util.concurrent.Future;
import io.netty.util.concurrent.GenericFutureListener;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.TimeoutException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* The Class StreamerFuture used in the {@link AbstractStreamer} implementation.
*/
public class StreamerFuture implements ChannelFuture {
private static final Logger log = LoggerFactory.getLogger(StreamerFuture.class);
private boolean success;
private boolean cancelled;
private boolean done;
private Throwable cause;
/** The streamer. */
protected Streamer streamer;
/** The listeners. */
protected List> listeners = new ArrayList>();
/** The latch. */
protected CountDownLatch latch = new CountDownLatch(1);
/**
* The Constructor.
*
* @param streamer
* the streamer
*/
public StreamerFuture(Streamer streamer) {
this.streamer = streamer;
}
/**
* Finished.
*
* @param success
* the success
*/
void finished(boolean success) {
finished(success, null);
}
/**
* Finished.
*
* @param success
* the success
* @param t
* the t
*/
void finished(boolean success, Throwable t) {
setDone(true);
setSuccess(success);
setCause(t);
finish();
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#isSuccess()
*/
@Override
public boolean isSuccess() {
return success;
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#isCancellable()
*/
@Override
public boolean isCancellable() {
return true;
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#cause()
*/
@Override
public Throwable cause() {
return cause;
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#await(long,
* java.util.concurrent.TimeUnit)
*/
@Override
public boolean await(long timeout, TimeUnit unit) throws InterruptedException {
return latch.await(timeout, unit);
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#await(long)
*/
@Override
public boolean await(long timeoutMillis) throws InterruptedException {
return await(timeoutMillis, TimeUnit.MILLISECONDS);
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#awaitUninterruptibly(long,
* java.util.concurrent.TimeUnit)
*/
@Override
public boolean awaitUninterruptibly(long timeout, TimeUnit unit) {
try {
return await(timeout, unit);
} catch (InterruptedException e) {
setCause(e);
setSuccess(false);
}
return false;
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#awaitUninterruptibly(long)
*/
@Override
public boolean awaitUninterruptibly(long timeoutMillis) {
return awaitUninterruptibly(timeoutMillis, TimeUnit.MILLISECONDS);
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#getNow()
*/
@Override
public Void getNow() {
return null;
}
/*
* (non-Javadoc)
*
* @see io.netty.util.concurrent.Future#cancel(boolean)
*/
@Override
public boolean cancel(boolean mayInterruptIfRunning) {
streamer.cancel();
setCancelled(true);
return true;
}
/*
* (non-Javadoc)
*
* @see java.util.concurrent.Future#isCancelled()
*/
@Override
public boolean isCancelled() {
return cancelled;
}
/*
* (non-Javadoc)
*
* @see java.util.concurrent.Future#isDone()
*/
@Override
public boolean isDone() {
return done;
}
/*
* (non-Javadoc)
*
* @see java.util.concurrent.Future#get()
*/
@Override
public Void get() throws InterruptedException, ExecutionException {
return null;
}
/*
* (non-Javadoc)
*
* @see java.util.concurrent.Future#get(long, java.util.concurrent.TimeUnit)
*/
@Override
public Void get(long timeout, TimeUnit unit) throws InterruptedException, ExecutionException, TimeoutException {
return null;
}
/*
* (non-Javadoc)
*
* @see io.netty.channel.ChannelFuture#channel()
*/
@Override
public Channel channel() {
return streamer.getChannel().getChannel();
}
/*
* (non-Javadoc)
*
* @see io.netty.channel.ChannelFuture#addListener(io.netty.util.concurrent.
* GenericFutureListener)
*/
@SuppressWarnings("unchecked")
@Override
public ChannelFuture addListener(GenericFutureListener> listener) {
listeners.add((GenericFutureListener) listener);
return this;
}
/*
* (non-Javadoc)
*
* @see io.netty.channel.ChannelFuture#addListeners(io.netty.util.concurrent.
* GenericFutureListener[])
*/
@SuppressWarnings("unchecked")
@Override
public ChannelFuture addListeners(GenericFutureListener>... listeners) {
for (GenericFutureListener> l : listeners) {
this.listeners.add((GenericFutureListener) l);
}
return this;
}
/*
* (non-Javadoc)
*
* @see
* io.netty.channel.ChannelFuture#removeListener(io.netty.util.concurrent.
* GenericFutureListener)
*/
@Override
public ChannelFuture removeListener(GenericFutureListener> listener) {
listeners.remove(listener);
return this;
}
/*
* (non-Javadoc)
*
* @see
* io.netty.channel.ChannelFuture#removeListeners(io.netty.util.concurrent
* .GenericFutureListener[])
*/
@Override
public ChannelFuture removeListeners(GenericFutureListener>... listeners) {
for (GenericFutureListener> l : listeners) {
this.listeners.remove(l);
}
return this;
}
/*
* (non-Javadoc)
*
* @see io.netty.channel.ChannelFuture#sync()
*/
@Override
public ChannelFuture sync() throws InterruptedException {
latch.await();
return this;
}
/*
* (non-Javadoc)
*
* @see io.netty.channel.ChannelFuture#syncUninterruptibly()
*/
@Override
public ChannelFuture syncUninterruptibly() {
try {
return sync();
} catch (InterruptedException e) {
setCause(e);
setSuccess(false);
}
return this;
}
/*
* (non-Javadoc)
*
* @see io.netty.channel.ChannelFuture#await()
*/
@Override
public ChannelFuture await() throws InterruptedException {
return sync();
}
/*
* (non-Javadoc)
*
* @see io.netty.channel.ChannelFuture#awaitUninterruptibly()
*/
@Override
public ChannelFuture awaitUninterruptibly() {
return syncUninterruptibly();
}
/**
* Notifies listeners and counts the latch down.
*/
protected void finish() {
for (GenericFutureListener l : listeners) {
try {
l.operationComplete(this);
} catch (Exception e) {
log.error("Error notifying listener of completion", e);
}
}
latch.countDown();
}
/**
* Sets the cause.
*
* @param cause
* the cause
*/
public void setCause(Throwable cause) {
this.cause = cause;
}
/**
* Sets the success.
*
* @param success
* the success
*/
public void setSuccess(boolean success) {
this.success = success;
}
/**
* Sets the cancelled.
*
* @param cancelled
* the cancelled
*/
public void setCancelled(boolean cancelled) {
this.cancelled = cancelled;
}
/**
* Sets the done.
*
* @param done
* the done
*/
public void setDone(boolean done) {
this.done = done;
}
}