[Seaside] Session reaping

[Johan Brichau]

Hi Esteban,

The cache implementation changed with Seaside 3.3 (https://github.com/SeasideSt/Seaside/wiki/Seaside330Changelog <https://github.com/SeasideSt/Seaside/wiki/Seaside330Changelog>)

As you say, the sweeping is done on every cache access. 
So, every time a session is accessed/created, the entire session cache is swept. (In Gemstone, this is different: a separate process is used to sweep the cache, where an instance of WABulkReapingCache is used instead).
As far as I remember, this has not changed from previous 3.x versions.

Does your session instance receive the #unregistered message ?
Are relying on #expiredRegistryKey being sent to the app?

Cheers
Johan

> On 17 Aug 2020, at 23:27, Esteban Maringolo <emaringolo at gmail.com> wrote:
> 
> Hi all,
> 
> I noticed that in recent versions of Seaside there was a change (to my
> knowledge) in the way Sessions and other objects in a WACache are
> reaped.
> 
> I have a model where each Seaside session (my own subclass of
> WASession, GwSession) has a "system" object that has its own
> GlorpSession. So in the #unregistered I log out from the database,
> freeing the connection.
> 
> So my question is: how is the cache reaping invoked?
> I noticed there is a #sweepIncrementally method that seems to be
> called before each access to the cache (this is new to me). Is there
> something else to it? Should I check somewhere else?
> 
> For some reason, my unregister event is not freeing up the
> connections, even though the sessions expired both in absolute and
> relative age. I also need a pooled database accessor, but that's a
> different story :-).
> 
> Regards!
> 
> Esteban A. Maringolo
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