[rules-users] looking for more information on drools expert

[Wolfgang Laun]

2009/7/15 Edson Tirelli <tirelli at post.com>:
>
>    Aldian,
>
>    Yes, this is the way to go:
>
> rule "detect and set routers different from root for alarm 45"
> When
>    * All routers which index is different from 0 are raising the alarm 45
>    * There is an alarm $a of numero 45 raised by an equipement $e
> different from the root
> Then
>    * execute some specific code on ($a,$e)
> end
>
>    It would be like this:
>
> when
>     forall( $e1 : Equipment( index != 0 )
>              Alarm( origin == $e1.name, probablecause == 45 )  )
>     $e2 : Equipment( index != 0 )
>     $a2 : Alarm( origin == $e2.name, probablecause == 45 )
> then
>     // do something with $e2 and $a2
> end
>

What happens if the RHS contains a retract( $a2 ), which (I think) is
one of the things Aldian intends to do?

Also, there is the requirement of inserting a summary alarm
replacing all the 45ers on non-root equipments. You may not
want to do this on the RHS, unless you rely on the engine
discarding fact duplicates.

-W