/*
    * The MIT License
    *
    * Copyright (c) 2009-, Sun Microsystems, Inc.
    *
    * Permission is hereby granted, free of charge, to any person obtaining a copy
    * of this software and associated documentation files (the "Software"), to deal
    * in the Software without restriction, including without limitation the rights
    * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  package com.sun.akuma;
  
  import java.net.ServerSocket;
  import java.net.Socket;
  import java.io.InputStream;
  import java.io.OutputStream;
  
  import static com.sun.akuma.CLibrary.LIBC;
  
  /**
   * Sample echo server.
   *
   * @author Kohsuke Kawaguchi
   */
  public class EchoServer extends NetworkServer {
      public static void main(String[] args) throws Exception {
          new EchoServer(args).run();
      }
  
      public EchoServer(String[] args) {
          super(args);
      }
  
      /**
       * Daemonize if something is given as arguments.
       */
      @Override
      protected boolean shouldBeDaemonized() {
          return !arguments.isEmpty();
      }
  
      @Override
      protected void frontend() throws Exception {
          System.out.println("This is a simple echo server. Run with some argument to fork into a daemon, then try 'nc localhost 12345' from several terminals.");
          super.frontend();
      }
  
      @Override
      protected void forkWorkers(JavaVMArguments args) throws Exception {
          // TODO: parse arguments and decide how many to fork
          forkWorkerThreads(args, 2);
      }
  
      @Override
      protected ServerSocket createServerSocket() throws Exception {
          System.out.println("Listening on port 12345");
          // TODO: parse arguments and decide port
          return new ServerSocket(12345);
      }
  
      @Override
      protected void worker(ServerSocket ss) throws Exception {
          byte[] buf = new byte[1024];
          // run a simple echo server
          while(true) {
              Socket s = ss.accept();
              System.out.println("PID:"+ LIBC.getpid()+" accepted a new connection");
  
              InputStream in = s.getInputStream();
              OutputStream out = s.getOutputStream();
  
              int len;
              while((len=in.read(buf))>=0)
                  out.write(buf,0,len);
  
              s.close();
          }
      }
  }