import java.io.IOException;
import java.net.ServerSocket;
import java.net.Socket;
import java.util.logging.Logger;

public class TCPEchoServerThread {

  public static void main(String[] args) throws IOException {

    if (args.length != 1) { // Test for correct # of args
      throw new IllegalArgumentException("Parameter(s): <Port>");
    }

    int echoServPort = Integer.parseInt(args[0]); // Server port

    // Create a server socket to accept client connection requests
    ServerSocket servSock = new ServerSocket(echoServPort);

    Logger logger = Logger.getLogger("practical");

    // Run forever, accepting and spawning a thread for each connection
    while (true) {
      Socket clntSock = servSock.accept(); // Block waiting for connection
      // Spawn thread to handle new connection
      Thread thread = new Thread(new EchoProtocol(clntSock, logger));
      thread.start();
      logger.info("Created and started Thread " + thread.getName());
    }
    /* NOT REACHED */
  }
}