[rules-users] Does drools have any trigger?

[Ingomar Otter]

Lindy,
by default Drools will re-evaluate the rules "as needed" once facts  
are changed (and the engine is told about it), so "when changed" is  
actually the default behavior.
The examples you give sound more like an event-processing scenario  
(reasoning over time) so you might want to have a look at drools-fusion.

 >Rules can be updated by business users thru BRMS and Guvnor?
The short answer yes.
The long answer: Your milage may vary.  It really depends on what type  
of rules and what  type of business users. I don't think it's safe to  
just "tick this box".
That has not much to do with Guvnor's capabilities (allthough it is a  
new product) - I rather think that this is not true for any BRMS.

-- Ingomar

Am 24.04.2009 um 18:30 schrieb Lindy hagan:

> I was looking at  Blaze Advisor documentation it has  “when changed”
> operator that only fires when an attribute of an object changes. A  
> business
> analyst might use it to watch for any important issue, such as a  
> thermostat
> warning in a process plant or a particular stock reaching a certain  
> price or
> volume.
>
> In similar way does Drools have this feature?
>
> Can any one correct if I am wrong: Rules can be updated by business  
> users
> thru BRMS and Guvnor? (I did not get chance to go thru these)
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