Advice needed on Apex and oracle context

Question

Hello,
I'm facing the next issue:
When I log into my Apex application I set a context site_id with a number.
I'm wondering if it is needed to set my context on every page or is one time enough?
At the moment it is working when I set my context one time when logging in.
On other pages I created an item where I display my context using:
return pck$context.f_get_site_id;
FUNCTION f_get_site_id
RETURN NUMBER
IS
BEGIN
RETURN sys_context(c_ct_context,c_ct_site_id);
END f_get_site_id;
So my question is: is it needed to create a process that executes itself on every page with setting the context or is one time enough?
Kind regards,
Oli

Answer 1

Well, for your purpose, you can make that assumption. The net result would be the same.
In reality, though, each page view is associated with a database session from the database connection pool managed by modplsql. You have no idea which database session you are "attaching" to for a subsequent page view. Thus, you should always set this context for each page view.
Strictly speaking, it's not a new database session. But for your purpose, you might as well operate like it is. Make sense?
Joel