3:04 p.m.
Hi
We are using Drools for events processing and lots of times there is a need
to compare the date/time property of the object to current time. What is the
best way to implement it with Drools rules?
Thanks
Senya Touretski
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3:41 p.m.
Have you looked at window:time, asw described in the Drools "Fusion" manual?
-W
On 01/04/2012, senyatur <senya.touretski(a)emc.com> wrote:
Hi
We are using Drools for events processing and lots of times there is a need
to compare the date/time property of the object to current time. What is the
best way to implement it with Drools rules?
Thanks
Senya Touretski
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View this message in context:
http://drools.46999.n3.nabble.com/Drools-NOW-tp3875148p3875148.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
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9:12 a.m.
yep
But as far as I understand (and that's how we are using it) window:time
defines the time window of the sample events to be inserted in the Drools
session. What I'm looking for is a way to define rule that will say
something like this:
class A{
Date aTime;
}
rule:
when
$a:A(aTime > current_time)
then
write_log_or_smth_else
And that is what we are unable to find. Hope it is more clear now...
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10:25 a.m.
Since your example would indicate that A.aTime is in the future
(relative to current_time) your A isn't a event.
There is no way you can have a permanently ongoing reevaluation of
facts against rules, which would be the consequence of a truthful fact
representing now in real time.
You might create a fact MyClock with an attribute myTime and set it to a value
that you consider as "current time" for the purpose and context of a
fireAllRules call. You sort of "freeze" Time for one evaluation, and
then you advance it, as convenient for another round.
-W
On 02/04/2012, senyatur <senya.touretski(a)emc.com> wrote:
yep
But as far as I understand (and that's how we are using it) window:time
defines the time window of the sample events to be inserted in the Drools
session. What I'm looking for is a way to define rule that will say
something like this:
class A{
Date aTime;
}
rule:
when
$a:A(aTime > current_time)
then
write_log_or_smth_else
And that is what we are unable to find. Hope it is more clear now...
--
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http://drools.46999.n3.nabble.com/Compare-with-current-time-in-Drools-tp3...
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senyatur -
Wolfgang Laun