[Building Sakai] question about UsageSessionServiceAdaptor refreshUser call

[Lydia Li]

Hi Scott,
When we first upgraded to Sakai 2.4, we also ran into major performance 
problems during login because of this. Instead of modifying 
UsageSessionServiceAdaptor.java, We modified the
refreshUser() in BaseAuthzGroupService.java and commented out these 2 
lines:
// wrap the provided map in our special map that will deal with compound 
provider ids
Map providerGrants = new ProviderMap(m_provider, 
m_provider.getGroupRolesForUser(eid));

m_storage.refreshUser(userId, providerGrants);

The purpose of these 2 lines is to refresh the sakai realm tables with 
the latest information from CM tables. At Stanford we are already doing 
it as part of our CM sync quartz jobs so it's not necessary to do it 
again. Removing these 2 lines reduced a huge amount of CM calls for us 
and improved login performance significantly. One way you can test your 
changes is to make some enrollment changes in CM for a user and then 
login as that user to see if that same user still sees the exact same 
information the second time he/she logs in.


thanks,
Lydia


Fischbein, Scott A. wrote:
>
> Can anyone tell me the purpose of this CM related call in 
> UsageSessionServiceAdaptor, around line 472:
>
> authzGroupService().refreshUser(authn.getUid());
>
> We’re trying to track down some performance issues during login under 
> heavy load, and as far as I can tell, disabling this call speeds up 
> the login process significantly, but doesn’t seem to have any effect 
> from the user’s perspective (ie: sites/tabs still populated, etc.)
>
> I haven’t been able to identify any negative side effects of disabling 
> this method call during initial login, but I wanted to check and see 
> if anyone could provide more information before proceeding.
>
> Thanks,
>
> Scott
>
> UC Davis Vet School
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> sakai-dev mailing list
> sakai-dev at collab.sakaiproject.org
> http://collab.sakaiproject.org/mailman/listinfo/sakai-dev
>
> TO UNSUBSCRIBE: send email to sakai-dev-unsubscribe at collab.sakaiproject.org with a subject of "unsubscribe"