🚀 go-pugleaf

Imaginary scenario:

* I have a server (service app+serversocket)

* The server is supposed to receive files from
many clients,  and store it in some folder say:
C:\DATA

* I want to periodically make a backup (pure copy)
of the C:\DATA folder to C:\BACKUP folder.

* It's not of major importance that backup procedure
starts exactly at specified time (I can wait for current
connections to finish the procedure first)

* I want to wait for connections to be finished first because
I think I can receive some error like 'file is occupied'
otherwise.

* How can I wait for clients to finish the connections
first, and still be in position to inform them via same port
that backup procedure is in progress.

How would you do that?

This is some pseudo code of how I see that:

bool TimeForBackup = false;

SERVICE EXECUTE()
{
   if ( IsTimeForBackup() )
   {
      TimeForBackup = true;
      wait_for_global_number_of_connections_to_be_null()
      BACKUP()
      TimeForBackup = false;
   }
   // Continue loop ...
}


SERVER SOCKET GET THREAD()
{
   if ( TimeForBackup )
   {
      SEND_MESSAGE_BACK( Backup is in progress! )
      return;
   }

   ++global_number_of_connections;
   // Store file to C:\DATA

   // Close the connection
   --global_number_of_connections;
}




-- 
Best regards,
Vladimir Stefanovic