[rules-users] Drools Fusion (CEP) & event life cycle

[Ephemeris Lappis]

Hello.
Indeed, I have tested with the @expires and the objects are discarded in 
this case. What I had understood in the documentation is precisely the 
other way that the engine is expected to control the events expiration : 
"Inferred Expiration" (8.8.2), when no temporal constraint involves the 
objects, they are discarded.
This seems the best way to be sure to eliminate as soon as possible all 
the useless objects, whatever their life time. This is particularly 
important with flows of thousands of events per second.
Perhaps I don't understand this well... Another idea or advice ?
Thanks for your help.
Regards.

Ephemeris Lappis

Le 27/08/2014 15:30, marianbuenosayres [via Drools] a écrit :
> I think that if you want the automatic event lifecycle management to 
> delete your events, you first need to notify the engine when an event 
> is old enough to realise it should be removed. This has to be managed 
> adding the @expires annotation to the event declaration:
>
> declare Notification
>    @role( event )
>    @expires ( 1h45m )
> end
>
> That will let the engine know it should remove the event from the 
> working memory (if no rule needs it) after an hour and 45 minutes. 
> Please check the doc about @expires in the following link:
>
> http://docs.jboss.org/drools/release/6.1.0.Final/drools-docs/html_single/#d0e10478
>
> Cheers,
>
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