[rules-users] Insert new facts in WorkingMemory event handler

[Michael Anstis]

Would the other retractions be automatically provided for by Drools' Truth
Maintenance?

Otherwise, passing a StatefulKnowledgeSession to a WorkingMemoryEventHandler
subclass and invoking it's methods should, IMO, not be an issue.

Have you tried it and experienced issues?

On 6 December 2010 09:32, Bruno Freudensprung <bruno.freudensprung at temis.com
> wrote:

> Hi everyone,
>
> Do you know if it is possible to insert/modify/retract facts in a
> working memory event handler?
>
> Here is my use case actually: I want my users to be able to write rules
> like "When ... Then retract X" without having to bother with the
> consequences of  retracting X on the other objects of the sessions (some
> of them might be retracted as well). These consequences can be expressed
> by rules, but I would like them to be kind of "part of the framework"
> and it would be easier for users if those rules were implicitly defined.
>
> Many thanks in advance for any hint,
> Best regards,
>
> Bruno.
>
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