Re: Continuation based app servers

Slava Akhmechet <coffeemug@xxxxxxxxx> writes:

Here is what I want to support:

(defun authenticatedp ()
(if *authenticatedp*
t
(do-modal #'login-or-register)))

(defun some-action ()
(when (authenticatedp)
(do-action)))

The key is 'do-modal' - a construct that shows a login page (which can
manage rounds of user interaction), and returns the result of the
login operation as if it were a simple function call.

I don't need continuations to achieve this functionality. The trick,
saving the stack, can be done with threads. Whenever 'do-modal' is
called, it can spawn a thread and assign it to the current
session. All interaction will then be executed by that thread while
'do-modal' blocks the original thread and waits for some signal from
the new one.

It can work.

The problem you have is that there is a limited number of threads
possible in a process (around 300 or 400). Therefore you can handle
only a limited number of concurent modal sessions (around 150 or 200
if you call recursively do-modal only once per session).


--
__Pascal Bourguignon__ http://www.informatimago.com/

NOTE: The most fundamental particles in this product are held
together by a "gluing" force about which little is currently known
and whose adhesive power can therefore not be permanently
guaranteed.
.

Relevant Pages

  • Re: Please! Doesnt anyone know a better way to do this?
    ... account, they need to automatically be directed to the page to enter data ... session variable on the Account page. ... I assume here that you're checking a database when the user attempts to ... When a new user attempts to login or clicks to register, ...
    (microsoft.public.dotnet.framework.aspnet)
  • Re: nooB PhP login using MySQL
    ... This PC has MySQL and IIS configured and running. ... how do I prevent users from bypassing the login? ... create a random string and store in session on server, ... euphemism for md5) but now that there are secure ways, ...
    (comp.lang.php)
  • Re: nooB PhP login using MySQL
    ... This PC has MySQL and IIS configured and running. ... how do I prevent users from bypassing the login? ... create a random string and store in session on server, ... euphemism for md5) but now that there are secure ways, ...
    (comp.lang.php)
  • Re: why a session-based program behaves different on different computers
    ... But if you lose the session you lose ... now, pray-tell, HOW IS THE DATA LOST? ... IF THERE IS NO LOGIN, HOW DO YOU DETERMINE WHICH ROW IT IS? ... let's stick to the architecture for a moment then. ...
    (comp.lang.php)
  • Help/Advice/Example Code Needed for This Project
    ... RegLoginServlet.java - Java source code for your registration / login ... CatServlet.java - Java source code for your catalog index servlet. ... ShopCartServlet.java - Java source code for the shopping cart servlet. ... If there is, that session should be invalidated, ...
    (comp.lang.java.help)