io.reactivesocket.netty.tcp.server.ServerTcpDuplexConnection.java Source code

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Here is the source code for io.reactivesocket.netty.tcp.server.ServerTcpDuplexConnection.java

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/**
 * Copyright 2015 Netflix, Inc.
 *
 * 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 io.reactivesocket.netty.tcp.server;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.reactivesocket.DuplexConnection;
import io.reactivesocket.Frame;
import io.reactivesocket.rx.Completable;
import io.reactivesocket.rx.Observable;
import io.reactivesocket.rx.Observer;
import org.reactivestreams.Publisher;
import org.reactivestreams.Subscriber;
import org.reactivestreams.Subscription;

import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;

public class ServerTcpDuplexConnection implements DuplexConnection {
    private final CopyOnWriteArrayList<Observer<Frame>> subjects;

    private final ChannelHandlerContext ctx;

    public ServerTcpDuplexConnection(ChannelHandlerContext ctx) {
        this.subjects = new CopyOnWriteArrayList<>();
        this.ctx = ctx;
    }

    public List<? extends Observer<Frame>> getSubscribers() {
        return subjects;
    }

    @Override
    public final Observable<Frame> getInput() {
        return o -> {
            o.onSubscribe(() -> subjects.removeIf(s -> s == o));
            subjects.add(o);
        };
    }

    @Override
    public void addOutput(Publisher<Frame> o, Completable callback) {
        o.subscribe(new Subscriber<Frame>() {
            @Override
            public void onSubscribe(Subscription s) {
                s.request(Long.MAX_VALUE);
            }

            @Override
            public void onNext(Frame frame) {
                try {
                    ByteBuffer data = frame.getByteBuffer();
                    ByteBuf byteBuf = Unpooled.wrappedBuffer(data);
                    ChannelFuture channelFuture = ctx.writeAndFlush(byteBuf);
                    channelFuture.addListener(future -> {
                        Throwable cause = future.cause();
                        if (cause != null) {
                            cause.printStackTrace();
                            callback.error(cause);
                        }
                    });
                } catch (Throwable t) {
                    onError(t);
                }
            }

            @Override
            public void onError(Throwable t) {
                callback.error(t);
            }

            @Override
            public void onComplete() {
                callback.success();
            }
        });
    }

    @Override
    public double availability() {
        return ctx.channel().isOpen() ? 1.0 : 0.0;
    }

    @Override
    public void close() throws IOException {

    }

    public String toString() {
        if (ctx == null || ctx.channel() == null) {
            return getClass().getName() + ":channel=null";
        }

        Channel channel = ctx.channel();
        return getClass().getName() + ":channel=[" + "remoteAddress=" + channel.remoteAddress() + "," + "isActive="
                + channel.isActive() + "," + "isOpen=" + channel.isOpen() + "," + "isRegistered="
                + channel.isRegistered() + "," + "isWritable=" + channel.isWritable() + "," + "channelId="
                + channel.id().asLongText() + "]";

    }
}