I would like to provide a "logout" button on just about every html-
page that i render in my WO-Application which would set some
session variables back to null and redirect the user to the 'Main'
page.
However i'm failing at finding the right spot ...
Hi Malte!
I'd suggest writing something like the following in your Session.java:
public WOComponent logout() {
// arrange for this session to terminate at the end of the Request/
Response loop
terminate();
// return a page to confirm that we're logged out
// note: make sure that LoggedOutPage doesn't have component action
links
// use direct actions with ?wosid = false binding
Application application = (Application)WOApplication.application();
return application.pageWithName("LoggedOutPage", context());
}
This code arranges to terminate the current session and sends to user
to a page which confirms that they've logged out. You can create
hyperlink which invokes this action directly or as Miguel mentioned,
you can create a custom logout component which calls this method.
Since you're terminating the session, there's really no need to clear
any session variables. They will go away when garbage collection
gets around to cleaning up the instance. (Yes, yes, you can null
them if you want to. :-)
Finally, a note about the LoggedOutPage! I like to give users a
confirmation that they've terminated their session. That's why I
send them to a page which says their session is terminated. I also
like that page to have a link back to the main/login page of the app
however I DON'T want a session hanging around. That means that the
LoggedOutPage needs to have direct actions only. That way, when the
user logs out, the session count of the application actually goes
down. (Your sysadmins will appreciate this design when they look at
the session count when trying to decide if any users are actually
using your application!!)
I hope that's clear!
Good luck!
Mark
__
Mark Ritchie
Diamond Lake Consulting Inc.
Toronto Ontario Canada
