mmo.server.Server.java Source code

Introduction

Here is the source code for mmo.server.Server.java

Source

/*
 * Copyright 2015 Florian Hassanen
 *
 * This file is part of mmo-server.
 *
 * mmo-server is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * mmo-server 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public
 * License along with mmo-server.  If not, see
 * <http://www.gnu.org/licenses/>.
 */

package mmo.server;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.FixedRecvByteBufAllocator;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.util.HashedWheelTimer;
import io.netty.util.concurrent.Future;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.inject.Inject;
import javax.inject.Provider;

public class Server {
    private static final Logger L = LoggerFactory.getLogger(Server.class);

    private final Provider<RouteHandler> routeHandlerProvider;
    private final HashedWheelTimer timer;
    private final GameLoop gameLoop;
    private NioEventLoopGroup parentGroup;
    private NioEventLoopGroup childGroup;

    @Inject
    public Server(Provider<RouteHandler> handlerProvider, HashedWheelTimer timer, GameLoop gameLoop) {
        this.routeHandlerProvider = handlerProvider;
        this.timer = timer;
        this.gameLoop = gameLoop;
    }

    public void run(String host, int port) {
        parentGroup = new NioEventLoopGroup();
        childGroup = new NioEventLoopGroup();

        new ServerBootstrap().group(parentGroup, childGroup).channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer<SocketChannel>() {
                    protected void initChannel(SocketChannel ch) throws Exception {
                        ch.pipeline().addLast(new HttpServerCodec(), //
                                new HttpObjectAggregator(65536), //
                                routeHandlerProvider.get());

                    }
                }).option(ChannelOption.TCP_NODELAY, true).childOption(ChannelOption.TCP_NODELAY, true)
                .childOption(ChannelOption.RCVBUF_ALLOCATOR, new FixedRecvByteBufAllocator(16384)).bind(host, port)
                .addListener(new ChannelFutureListener() {
                    @Override
                    public void operationComplete(ChannelFuture future) throws Exception {
                        if (!future.isSuccess()) {
                            L.error("Error setting up server channel: {}", future.cause(), null);
                            new Thread(() -> { // TODO shutdown program
                                // gracefuller
                                try {
                                    shutdown();
                                } catch (InterruptedException e) {
                                    e.printStackTrace();
                                } finally {
                                    System.exit(1);
                                }
                            }).start();
                        }
                    }
                });
    }

    public void shutdown() throws InterruptedException {
        timer.stop();
        Future<?> parentShutdown = parentGroup.shutdownGracefully();
        Future<?> childShutdown = childGroup.shutdownGracefully();
        Future<?> gameLoopShutdown = gameLoop.shutdownGracefully();
        parentShutdown.await();
        childShutdown.await();
        gameLoopShutdown.await();
    }
}