ratpack.server.internal.NettyRatpackService.java Source code

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Here is the source code for ratpack.server.internal.NettyRatpackService.java

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/*
 * Copyright 2013 the original author or authors.
 *
 * 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 ratpack.server.internal;

import com.google.common.util.concurrent.AbstractIdleService;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.util.concurrent.DefaultThreadFactory;
import ratpack.launch.LaunchConfig;
import ratpack.server.Stopper;
import ratpack.util.Transformer;

import java.net.InetSocketAddress;
import java.util.logging.Level;
import java.util.logging.Logger;

import static ratpack.util.ExceptionUtils.uncheck;

public class NettyRatpackService extends AbstractIdleService implements RatpackService {

    private final Logger logger = Logger.getLogger(getClass().getName());

    private final LaunchConfig launchConfig;
    private final Transformer<Stopper, ChannelInitializer<SocketChannel>> channelInitializerTransformer;

    private InetSocketAddress boundAddress;
    private Channel channel;
    private EventLoopGroup group;

    public NettyRatpackService(LaunchConfig launchConfig,
            Transformer<Stopper, ChannelInitializer<SocketChannel>> channelInitializerTransformer) {
        this.launchConfig = launchConfig;
        this.channelInitializerTransformer = channelInitializerTransformer;
    }

    @Override
    protected void startUp() throws Exception {
        Stopper stopper = new Stopper() {
            @Override
            public void stop() {
                try {
                    NettyRatpackService.this.stop();
                } catch (Exception e) {
                    throw uncheck(e);
                }
            }
        };

        ServerBootstrap bootstrap = new ServerBootstrap();
        group = new NioEventLoopGroup(launchConfig.getMainThreads(),
                new DefaultThreadFactory("ratpack-group", Thread.MAX_PRIORITY));

        ChannelInitializer<SocketChannel> channelInitializer = channelInitializerTransformer.transform(stopper);

        bootstrap.group(group).channel(NioServerSocketChannel.class).childHandler(channelInitializer)
                .childOption(ChannelOption.ALLOCATOR, launchConfig.getBufferAllocator())
                .childOption(ChannelOption.TCP_NODELAY, true).option(ChannelOption.SO_REUSEADDR, true)
                .option(ChannelOption.SO_BACKLOG, 1024)
                .option(ChannelOption.ALLOCATOR, launchConfig.getBufferAllocator());

        try {
            channel = bootstrap.bind(buildSocketAddress()).sync().channel();
        } catch (Exception e) {
            partialShutdown();
            throw e;
        }
        boundAddress = (InetSocketAddress) channel.localAddress();

        if (logger.isLoggable(Level.INFO)) {
            logger.info(String.format("Ratpack started for http://%s:%s", getBindHost(), getBindPort()));
        }
    }

    @Override
    protected void shutDown() throws Exception {
        channel.close();
        partialShutdown();
    }

    private void partialShutdown() {
        group.shutdownGracefully();
        launchConfig.getBackgroundExecutorService().shutdown();
    }

    @Override
    public String getScheme() {
        return launchConfig.getSSLContext() == null ? "http" : "https";
    }

    public int getBindPort() {
        return boundAddress == null ? -1 : boundAddress.getPort();
    }

    public String getBindHost() {
        if (boundAddress == null) {
            return null;
        } else {
            return InetSocketAddressBackedBindAddress.determineHost(boundAddress);
        }
    }

    private InetSocketAddress buildSocketAddress() {
        return (launchConfig.getAddress() == null) ? new InetSocketAddress(launchConfig.getPort())
                : new InetSocketAddress(launchConfig.getAddress(), launchConfig.getPort());
    }

}