reactor.ipc.netty.channel.CloseableContextHandler.java Source code

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Here is the source code for reactor.ipc.netty.channel.CloseableContextHandler.java

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/*
 * Copyright (c) 2011-2016 Pivotal Software Inc, All Rights Reserved.
 *
 * Licensed 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 reactor.ipc.netty.channel;

import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Objects;
import java.util.function.BiFunction;

import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.socket.DatagramChannel;
import io.netty.channel.socket.ServerSocketChannel;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.util.concurrent.Future;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Mono;
import reactor.core.publisher.MonoSink;
import reactor.ipc.netty.FutureMono;
import reactor.ipc.netty.NettyContext;
import reactor.ipc.netty.options.NettyOptions;
import reactor.util.Logger;
import reactor.util.Loggers;

/**
 * @param <CHANNEL> the channel type
 *
 * @author Stephane Maldini
 */
abstract class CloseableContextHandler<CHANNEL extends Channel> extends ContextHandler<CHANNEL>
        implements ChannelFutureListener {

    static final Logger log = Loggers.getLogger(CloseableContextHandler.class);

    ChannelFuture f;

    CloseableContextHandler(ChannelOperations.OnNew<CHANNEL> channelOpFactory, NettyOptions<?, ?> options,
            MonoSink<NettyContext> sink, LoggingHandler loggingHandler) {
        super(channelOpFactory, options, sink, loggingHandler);
    }

    @Override
    protected Publisher<Void> onCloseOrRelease(Channel channel) {
        return FutureMono.from(channel.closeFuture());
    }

    @Override
    public final void operationComplete(ChannelFuture f) throws Exception {
        if (!f.isSuccess()) {
            if (f.isCancelled()) {
                log.debug("Cancelled {}", f.channel().toString());
                return;
            }
            if (f.cause() != null) {
                sink.error(f.cause());
            } else {
                sink.error(new IOException("error while connecting to " + f.channel().toString()));
            }
        } else {
            doStarted(f.channel());
        }
    }

    @Override
    @SuppressWarnings("unchecked")
    public final void setFuture(Future<?> future) {
        Objects.requireNonNull(future, "future");
        if (this.f != null) {
            future.cancel(true);
            return;
        }
        if (log.isDebugEnabled()) {
            log.debug("Connecting new channel: {}", future.toString());
        }
        this.f = (ChannelFuture) future;
        f.addListener(this);
        sink.setCancellation(this);
    }

    @Override
    public final void dispose() {
        if (f.channel().isOpen()) {
            f.channel().close();
        } else if (!f.isDone()) {
            f.cancel(true);
        }
    }
}