org.aotorrent.client.TorrentClient.java Source code

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Here is the source code for org.aotorrent.client.TorrentClient.java

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/*
 * Copyright 2014 Napolov Dmitry
 *
 * 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 org.aotorrent.client;

import com.google.common.collect.Maps;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import io.netty.util.AttributeKey;
import org.aotorrent.common.Torrent;
import org.aotorrent.common.TorrentEngine;
import org.aotorrent.common.bencode.InvalidBEncodingException;
import org.apache.commons.codec.binary.Hex;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Nullable;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Map;

/**
 * Project: AOTorrent
 * User:    dmitry
 * Date:    3/13/14.
 */
public class TorrentClient implements Runnable {
    private static final Logger LOGGER = LoggerFactory.getLogger(TorrentClient.class);

    private final Map<String, TorrentEngine> torrentEngines = Maps.newHashMap();

    private final InetSocketAddress localSocketAddress;
    private boolean isRunning;
    private EventLoopGroup workerGroup;
    private EventLoopGroup bossGroup;
    private Thread thread;

    public TorrentClient(InetSocketAddress localSocketAddress) {
        this.localSocketAddress = localSocketAddress;
    }

    @Override
    public void run() {
        // Configure the server.
        try {
            ServerBootstrap b = new ServerBootstrap();
            b.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class)
                    .option(ChannelOption.SO_BACKLOG, 100).handler(new LoggingHandler(LogLevel.INFO))
                    .childHandler(new InboundChannelInitializer(this))
                    .childAttr(AttributeKey.valueOf("torrentEngines"), torrentEngines);

            // Start the server.
            ChannelFuture f = b.bind(localSocketAddress.getPort()).sync();

            // Wait until the server socket is closed.
            f.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            LOGGER.info("Interrupted");
        } finally {
            // Shut down all event loops to terminate all threads.
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public TorrentEngine addTorrent(String torrentFilePath, String downloadPath)
            throws IOException, InvalidBEncodingException {
        if (!isRunning) {
            throw new IllegalStateException("Client should be started before adding torrents");
        }

        Torrent torrent = new Torrent(torrentFilePath, downloadPath);
        final String infoHash = Hex.encodeHexString(torrent.getInfoHash());

        if (torrentEngines.containsKey(infoHash)) {
            throw new IllegalStateException("This torrent already exist in engine");
        }

        TorrentEngine torrentEngine = new TorrentEngine(torrent, localSocketAddress, workerGroup);
        torrentEngines.put(infoHash, torrentEngine);

        torrentEngine.init();

        return torrentEngine;
    }

    @Nullable
    public TorrentEngine getEngine(String infoHash) {
        return torrentEngines.get(infoHash);
    }

    public void start() {
        bossGroup = new NioEventLoopGroup();
        workerGroup = new NioEventLoopGroup();
        thread = new Thread(this);
        thread.start();
        isRunning = true;
    }

    public void stop() {
        this.isRunning = false;
        for (TorrentEngine torrentEngine : torrentEngines.values()) {
            torrentEngine.shutdown();
        }
        thread.interrupt();
    }

    @Override
    public String toString() {
        return "TorrentClient{" + "TorrentEngines=" + torrentEngines.values() + '}';
    }

    public boolean isAlive() {
        return thread.isAlive();
    }
}