org.anhonesteffort.p25.chnlzr.ChnlzrConnectionFactory.java Source code

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Here is the source code for org.anhonesteffort.p25.chnlzr.ChnlzrConnectionFactory.java

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/*
 * Copyright (C) 2015 An Honest Effort LLC, coping.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */

package org.anhonesteffort.p25.chnlzr;

import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.timeout.IdleStateHandler;
import org.anhonesteffort.chnlzr.ChnlzrConfig;
import org.anhonesteffort.chnlzr.capnp.BaseMessageDecoder;
import org.anhonesteffort.chnlzr.capnp.BaseMessageEncoder;
import org.anhonesteffort.chnlzr.netty.IdleStateHeartbeatWriter;

import java.net.ConnectException;
import java.util.concurrent.TimeUnit;

public class ChnlzrConnectionFactory {

    private final ChnlzrConfig config;
    private final Class<? extends Channel> channel;
    private final EventLoopGroup workerGroup;

    public ChnlzrConnectionFactory(ChnlzrConfig config, Class<? extends Channel> channel,
            EventLoopGroup workerGroup) {
        this.config = config;
        this.channel = channel;
        this.workerGroup = workerGroup;
    }

    public ListenableFuture<ChnlzrConnectionHandler> create(HostId chnlzrHost) {
        SettableFuture<ChnlzrConnectionHandler> future = SettableFuture.create();
        ChnlzrConnectionHandler connection = new ChnlzrConnectionHandler(future);
        Bootstrap bootstrap = new Bootstrap();

        bootstrap.group(workerGroup).channel(channel).option(ChannelOption.SO_KEEPALIVE, true)
                .option(ChannelOption.TCP_NODELAY, true)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, config.connectionTimeoutMs())
                .option(ChannelOption.WRITE_BUFFER_HIGH_WATER_MARK, config.bufferHighWaterMark())
                .option(ChannelOption.WRITE_BUFFER_LOW_WATER_MARK, config.bufferLowWaterMark())
                .handler(new ChannelInitializer<SocketChannel>() {
                    @Override
                    public void initChannel(SocketChannel ch) {
                        ch.pipeline().addLast("idle state",
                                new IdleStateHandler(0, 0, config.idleStateThresholdMs(), TimeUnit.MILLISECONDS));
                        ch.pipeline().addLast("heartbeat", IdleStateHeartbeatWriter.INSTANCE);
                        ch.pipeline().addLast("encoder", BaseMessageEncoder.INSTANCE);
                        ch.pipeline().addLast("decoder", new BaseMessageDecoder());
                        ch.pipeline().addLast("connector", connection);
                    }
                });

        bootstrap.connect(chnlzrHost.getHostname(), chnlzrHost.getPort()).addListener(connect -> {
            if (!connect.isSuccess())
                future.setException(new ConnectException("failed to connect to chnlzr"));
        });

        return future;
    }

}