[rules-users] How to get notified just before rule is picked up for evaluation

[Mattias Nilsson Grip]

Hi Ghanshyam,

I'm afraid there is no such way. The reason is that Drools does not evaluate rules one by one. A rule can consist of multiple conditions and some of those conditions can be shared by multiple rules (node sharing in RETE network).

When you insert a fact into your session, conditions from multiple rules for that fact type are evaluated. So different parts of a rule's conditions may be evaluated at different times during your insert of facts.

Only when all conditions for a rule have been evaluated to true an activation is created.

Regards,
Mattias

----- Original Message -----
From: GPatel at tsys.com
To: rules-users at lists.jboss.org
Sent: Thursday, 15 November, 2012 2:41:04 AM
Subject: [rules-users] How to get notified just before rule is picked up for	evaluation


Is there a way to get a hook into just before a rule is evaluated to determine whether an activation is created ? 

The earliest hook available is DefaultAgendaEventListener . activationCreated(ActivationCreatedEvent event) 

What I am looking for is to get notified just before a rule is picked up for evaluation and just after it has been evaluated. 

Thanks 
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