/*
    * 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:
    *
    *   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.jboss.netty.example.proxy;
  
  import java.net.InetSocketAddress;
  import java.util.concurrent.Executor;
  import java.util.concurrent.Executors;
  
  import org.jboss.netty.bootstrap.ServerBootstrap;
  import org.jboss.netty.channel.socket.ClientSocketChannelFactory;
  import org.jboss.netty.channel.socket.nio.NioClientSocketChannelFactory;
  import org.jboss.netty.channel.socket.nio.NioServerSocketChannelFactory;
  
  public class HexDumpProxy {
  
      private final int localPort;
      private final String remoteHost;
      private final int remotePort;
  
      public HexDumpProxy(int localPort, String remoteHost, int remotePort) {
          this.localPort = localPort;
          this.remoteHost = remoteHost;
          this.remotePort = remotePort;
      }
  
      public void run() {
          System.err.println(
                  "Proxying *:" + localPort + " to " +
                  remoteHost + ':' + remotePort + " ...");
  
          // Configure the bootstrap.
          Executor executor = Executors.newCachedThreadPool();
          ServerBootstrap sb = new ServerBootstrap(
                  new NioServerSocketChannelFactory(executor, executor));
  
          // Set up the event pipeline factory.
          ClientSocketChannelFactory cf =
                  new NioClientSocketChannelFactory(executor, executor);
  
          sb.setPipelineFactory(
                  new HexDumpProxyPipelineFactory(cf, remoteHost, remotePort));
  
          // Start up the server.
          sb.bind(new InetSocketAddress(localPort));
      }
  
      public static void main(String[] args) throws Exception {
          // Validate command line options.
          if (args.length != 3) {
              System.err.println(
                      "Usage: " + HexDumpProxy.class.getSimpleName() +
                      " <local port> <remote host> <remote port>");
              return;
          }
  
          // Parse command line options.
          int localPort = Integer.parseInt(args[0]);
          String remoteHost = args[1];
          int remotePort = Integer.parseInt(args[2]);
  
          new HexDumpProxy(localPort, remoteHost, remotePort).run();
      }
  }