> Question: Is there a thread safe pattern or approach for scanning the > client > sockets in the TWSocketServer collection from a different thread?
Accessing the TWsocketServer.Client[] is /not/ thread safe. You /must/ access it only from the thread which created the TWSocketServer instance. -- Contribute to the SSL Effort. Visit http://www.overbyte.be/eng/ssl.html -- [EMAIL PROTECTED] http://www.overbyte.be ----- Original Message ----- From: <[EMAIL PROTECTED]> To: <twsocket@elists.org> Sent: Friday, November 10, 2006 11:57 PM Subject: [twsocket] Scanning Client Socket and Housekeeping from differentthread... > Hello. > > > > I have a question that relates to doing basic client connection > housekeeping > from a different thread than the TWSocketServer's thread. > > > > System Overview: I have a server application that uses a TWSocketServer. > The TWSocketServer is located on the main form, thus it is in the main > thread. All inbound packets are handled from the app's main thread by > this > TWSocketServer. > > > > If an inbound packet requires a CPU intensive process, an event is queued > by > a thread pool manager for handling those processes out-of-line. The > threaded tasks within the thread pool may generate response packets from > their own thread space. > > > > This is all working wonderfully. Now, I need to implement some basic > housekeeping on the client sockets. Basically, this entails a simple > pattern or iterating through all the client sockets periodically and > checking for dead sockets and other types of issues. I have a KeepAlive > packet system that simply pings this server from the client periodically > and > updates a LastTransmit / LastReceive time flags. Also, for security > purposes, initial secure channel handshaking mandates that untrusted or > unpromoted connections be dropped within a certain time length. > > > > So, I could simply implement the housekeeping in the main thread with a > basic TTimer event and scan the client sockets there from within the main > thread itself. However, I am concerned about causing a performance > slowdown > when this occurs, by scanning from within the main thread. > > > > However, I could also spawn a thread for doing this housekeeping. > > > > Question: Is there a thread safe pattern or approach for scanning the > client > sockets in the TWSocketServer collection from a different thread? Does a > specific client socket need to be locked somehow when checking it? Or is > this even necessary or relevant? > > > > Or would it just be best to scan from within the app's main thread? The > client sockets are persistent sessions and I do not expect to have more > than > 200 to 300 on a particular server, although that limit is not currently > decided. > > > > Just wondering what your advice would be for which direction to take: > Main > thread or separate thread for housekeeping chores? > > > > Thanks much! Love ICS! > > > > Hoby > > > > -- > To unsubscribe or change your settings for TWSocket mailing list > please goto http://www.elists.org/mailman/listinfo/twsocket > Visit our website at http://www.overbyte.be -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
