🚀 go-pugleaf

Mozy,

serverSocket.accept() blocks until the next connection is made.
After setting listening to false your SrvrListener would still 
accept *one* more connection and then stop. Current threads are
untouched and keep running. So it already does a "graceful close 
down". 

>what is the best way to limit the number of threads spawned?

A simple counter would do I guess. 

Torsten

"Mozy" <mozybth@covad.net> wrote:
>Hi all,
>
>I'm having some problems understanding how sockets work and possibly threads
>as well. Most of this code was taken from the tutorial on sockets from the
>javasoft web site. I have this class:
>
>public class SrvrListener
>{
>  private static boolean listening;
>  private ServerSocket serverSocket = null;
>
>  public void StartListening() throws IOException
>  {
>    StartListening(5555);
>  }
>
>  public void StartListening(int port) throws IOException
>  {
>
>    listening = true ;
>
>    serverSocket = new ServerSocket(port);
>
>    while (listening)
>        new SrvrListenerThread(serverSocket.accept()).start();
>
>    serverSocket.close();
>  }
>
>  public void StopListening()
>  {
>    listening = false;
>  }
>}
>
>I have a couple of questions here. Why doesn't a call to StopListening()
>cause the sever to stop? Is it because the server socket won't close if it
>still has open connections with a client?? What would be the best way to
>stop accepting new connections while at the same time allowing any current
>threads to finish processing (in effect a graceful close down)?  Along the
>same lines, what is the best way to limit the number of threads spawned?
>
>Any suggestions are greatly appreciated.
>
>TIA
>
>mozy
>
>