/*
    * Copyright 2012 The Netty Project
    *
    * The Netty Project licenses this file to you 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:
    *
    *   https://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.netty.example.portunification;
  
  import io.netty.bootstrap.ServerBootstrap;
  import io.netty.channel.ChannelInitializer;
  import io.netty.channel.EventLoopGroup;
  import io.netty.channel.MultiThreadIoEventLoopGroup;
  import io.netty.channel.nio.NioIoHandler;
  import io.netty.channel.socket.SocketChannel;
  import io.netty.channel.socket.nio.NioServerSocketChannel;
  import io.netty.handler.logging.LogLevel;
  import io.netty.handler.logging.LoggingHandler;
  import io.netty.handler.ssl.SslContext;
  import io.netty.handler.ssl.SslContextBuilder;
  import io.netty.handler.ssl.util.SelfSignedCertificate;
  
  /**
   * Serves two protocols (HTTP and Factorial) using only one port, enabling
   * either SSL or GZIP dynamically on demand.
   * <p>
   * Because SSL and GZIP are enabled on demand, 5 combinations per protocol
   * are possible: none, SSL only, GZIP only, SSL + GZIP, and GZIP + SSL.
   */
  public final class PortUnificationServer {
  
      static final int PORT = Integer.parseInt(System.getProperty("port", "8080"));
  
      public static void main(String[] args) throws Exception {
          // Configure SSL context
          SelfSignedCertificate ssc = new SelfSignedCertificate();
          final SslContext sslCtx = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey())
              .build();
  
          EventLoopGroup bossGroup = new MultiThreadIoEventLoopGroup(1, NioIoHandler.newFactory());
          EventLoopGroup workerGroup = new MultiThreadIoEventLoopGroup(NioIoHandler.newFactory());
          try {
              ServerBootstrap b = new ServerBootstrap();
              b.group(bossGroup, workerGroup)
               .channel(NioServerSocketChannel.class)
               .handler(new LoggingHandler(LogLevel.INFO))
               .childHandler(new ChannelInitializer<SocketChannel>() {
                  @Override
                  public void initChannel(SocketChannel ch) throws Exception {
                      ch.pipeline().addLast(new PortUnificationServerHandler(sslCtx));
                  }
              });
  
              // Bind and start to accept incoming connections.
              b.bind(PORT).sync().channel().closeFuture().sync();
          } finally {
              bossGroup.shutdownGracefully();
              workerGroup.shutdownGracefully();
          }
      }
  }