content: package com.taobao.arthas.core.shell.term.impl.httptelnet;
  
  import com.taobao.arthas.core.shell.term.impl.http.session.HttpSessionManager;
  
  import io.netty.bootstrap.ServerBootstrap;
  import io.netty.channel.ChannelInitializer;
  import io.netty.channel.ChannelOption;
  import io.netty.channel.EventLoopGroup;
  import io.netty.channel.group.ChannelGroup;
  import io.netty.channel.group.DefaultChannelGroup;
  import io.netty.channel.nio.NioEventLoopGroup;
  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.util.concurrent.DefaultThreadFactory;
  import io.netty.util.concurrent.EventExecutorGroup;
  import io.netty.util.concurrent.Future;
  import io.netty.util.concurrent.GenericFutureListener;
  import io.netty.util.concurrent.ImmediateEventExecutor;
  import io.termd.core.function.Consumer;
  import io.termd.core.function.Supplier;
  import io.termd.core.telnet.TelnetBootstrap;
  import io.termd.core.telnet.TelnetHandler;
  import io.termd.core.tty.TtyConnection;
  
  /**
   * @author <a href="mailto:julien@julienviet.com">Julien Viet</a>
   * @author hengyunabc 2019-11-05
   */
  public class NettyHttpTelnetBootstrap extends TelnetBootstrap {
  
      private EventLoopGroup group;
      private ChannelGroup channelGroup;
      private EventExecutorGroup workerGroup;
      private HttpSessionManager httpSessionManager;
  
      public NettyHttpTelnetBootstrap(EventExecutorGroup workerGroup, HttpSessionManager httpSessionManager) {
          this.workerGroup = workerGroup;
          this.group = new NioEventLoopGroup(new DefaultThreadFactory("arthas-NettyHttpTelnetBootstrap", true));
          this.channelGroup = new DefaultChannelGroup(ImmediateEventExecutor.INSTANCE);
          this.httpSessionManager = httpSessionManager;
      }
  
      public NettyHttpTelnetBootstrap setHost(String host) {
          return (NettyHttpTelnetBootstrap) super.setHost(host);
      }
  
      public NettyHttpTelnetBootstrap setPort(int port) {
          return (NettyHttpTelnetBootstrap) super.setPort(port);
      }
  
      @Override
      public void start(Supplier<TelnetHandler> factory, Consumer<Throwable> doneHandler) {
          // ignore, never invoke
  
      }
  
      public void start(final Supplier<TelnetHandler> handlerFactory, final Consumer<TtyConnection> factory,
                      final Consumer<Throwable> doneHandler) {
          ServerBootstrap boostrap = new ServerBootstrap();
          boostrap.group(group).channel(NioServerSocketChannel.class).option(ChannelOption.SO_BACKLOG, 100)
                          .handler(new LoggingHandler(LogLevel.INFO))
                          .childHandler(new ChannelInitializer<SocketChannel>() {
                              @Override
                              public void initChannel(SocketChannel ch) throws Exception {
                                  ch.pipeline().addLast(new ProtocolDetectHandler(channelGroup, handlerFactory, factory, workerGroup, httpSessionManager));
                              }
                          });
  
          boostrap.bind(getHost(), getPort()).addListener(new GenericFutureListener<Future<? super Void>>() {
              @Override
              public void operationComplete(Future<? super Void> future) throws Exception {
                  if (future.isSuccess()) {
                      doneHandler.accept(null);
                  } else {
                      doneHandler.accept(future.cause());
                  }
              }
          });
      }
  
      @Override
      public void stop(final Consumer<Throwable> doneHandler) {
          GenericFutureListener<Future<Object>> adapter = new GenericFutureListener<Future<Object>>() {
              @Override
              public void operationComplete(Future<Object> future) throws Exception {
                  try {
                      doneHandler.accept(future.cause());
                  } finally {
                      group.shutdownGracefully();
                  }
              }
          };
          channelGroup.close().addListener(adapter);
      }
  
  }