On Sun, Feb 10, 2002 at 03:04:40PM -0600, Jose Solorzano wrote: > Yes, it does sound kind of weird :) > > You could simply use sockets for the initial connection. That way you > won't need at least one blocked HttpConnector thread for each active > applet client. Threads are relatively expensive. Also, you should > take into consideration that certain routers won't let you keep a > connection open indefinitely. > > To solve your load-balancing issue, I guess you could assign a > globally unique ID to each active applet, and have the load balancer > redirect/proxy applet connections to the right server based on the ID, > or have the applet establish an initial connection with all the load > balanced servers, or get the servers to talk to each other. It depends > on what you can do with the load balancer you're using.
What you describe is what TC4.0.2 + mod_jk + apache does. You assign a unique jvmRoute to each of you tomcats and mod_jk does the rest. Also note that any attributes assigned to a session can only be available in one VM. > --Jose > > > ----- Original Message ----- > From: Vjeran Marcinko <[EMAIL PROTECTED]> > Sent: Sunday, February 10, 2002 09:01 AM > To: Tomcat Users List > Subject: Re: Load balancing app context ? > > > ----- Original Message ----- > From: "Jose Solorzano" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> > Sent: Sunday, February 10, 2002 2:32 PM > Subject: RE: Load balancing app context ? > > > > > > What kind of state do you store in those variables? > > > > With multiple VMs, you can store user/session state in cookies, in a > > shared database or you can use an application server. > > > > --Jose > > Well, I know it sounds weird, but I'm storing servlet's output stream > in those variables. And than I block this servlet, thus it won't be > able to close its output stream, which is the thing that happens when > servlet thread goes out of its service() method. > > This way I have persistent output stream to client. And then all > future HTTP requests can fetch this stored output stream and send some > data back to client. But since I have multiple JVMs, this stored > variable isn't unique anymore, because there are as many variables as > there are JVMs, and each of them has its own servlet instance, right ? > > Thing works perfectly with one servlet engine instance, but I guess it > won't do in load-balancing case... I didn't consider session till > now, since client is applet and not browser, and I'm not sure how good > is applet's URLConnection doing with cookies ? > > -Vjeran -- To unsubscribe: <mailto:[EMAIL PROTECTED]> For additional commands: <mailto:[EMAIL PROTECTED]> Troubles with the list: <mailto:[EMAIL PROTECTED]>
