[rules-users] How to Compute against WorkingMemory in Drools ?

[Wolfgang Laun]

You can have one fact in WM and this object can contain any number of
list fields.

This approach may be useful or not - much depends on the way the
correlation between batch n and batch n+1 is to be determined.

I think I mentioned the alternative, but I can't be more specific
since I don't know about this correlation and about what should happen
to batch n after n+1 has been processed. In any case, for this
scenario, an Alert should contain a batch identifier.

-W


On 26/04/2013, vr <veneet at aol.in> wrote:
> Actually that a quick sample to make my point and also  you're correct i
> have
> just kept a ArrayList inside the Alert POJO as I said I am completly new to
> Drools and RE and am still working on fragments...  those functions are just
>
> sample placeholders
>
>
> So assuming I got *Batch 1* and the *$list*  has the alerts received in
> Batch 1
>
> When I get *Batch 2*,  15seconds later I want to be able to compare the
> alerts received in Batch 2 against the one's in Batch 1 that was already
> processed by the Rule engine.
>
> So that i can draw up the correlation for the fresh alerts with the old ones
>
> and this is going to happen  till a stipulated timeout say 1-2 hours which
> gives me a lot of interim batches received.
>
> the Correlation has to be recursive so that i can make the Alerts compact
> and deliever them to downstream systems after the 1-2 hour interval
> elapses.
>
>
> hence i am looking out for how to retain the collections in RE be it
> WorkingMemory or some other area.
>
> Hope I am able to clarify my scenario a bit better.
>
>
>
>
> -----
> Thanks for the support ...!!!
> VR
>
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