Re: [rules-users] Temporal rules in decision table
Amazing!
thanks a lot Wolfgang!
Kind regards
On Wed, Mar 12, 2014 at 10:27 AM, Wolfgang Laun wrote:
> You can create a rule with a timer to update Current with the required
> frequency.
>
> rule "set current"
>timer (int: 1s 1s)
>no-loop
> when
>$c: Current()
> then
>modify( $c ){ setXYZ(whatever) }
> end
>
>
>
> On 11/03/2014, Ioannis Christodoulou wrote:
> > Thanks a lot for the prompt reply and the detailed example!
> > It took me some time but I managed to convert it to a working xls
> decision
> > table.
> >
> > Now, I wanted to figure out how to automatically update the Current
> object
> > regularly, in order to re-calculate the rules over time.
> > My application is a java ee one. Would creating a @schedule on a
> singleton
> > method be a good solution, or is there another better advice for it?
> >
> > Thanks again!
> >
> > Ευχαριστώ πολύ,
> >Ιωάννης Χριστοδούλου
> >
> >
> > On Tue, Mar 11, 2014 at 8:50 PM, Wolfgang Laun
> > wrote:
> >
> >> As you have Level with a field date, you can access that point in time
> in
> >> milliseconds, using getTimeInMillis(). For the current time, you might
> >> insert an object of class Current with a member now of class Calendar.
> >>
> >> rule closest
> >> when
> >> Current( $now: now )
> >> $level: Level( $value == 2, $date: date )
> >> not $x: Level( Math.abs( $x.getDate().getTimeInMillis() -
> >> $now.getTimeInMillis() ) < Math.abs( $date.getTimeInMillis() -
> >> $now.getTimeInMillis() ) )
> >> then
> >> // $level is the Level fact closest to Current with a level of 2
> >> end
> >>
> >> Untested. If the long expression gives you trouble, try enclosing it in
> >> eval(...).
> >> -W
> >>
> >>
> >> On 11 March 2014 18:14, JChrist wrote:
> >>
> >>> Hello everyone,
> >>> I was messing with drools v6.0.1.Final the past week and I have not
> been
> >>> able to completely understand how to integrate the rule engine to my
> >>> specification.
> >>>
> >>> For the needs of my project, I want to regularly insert some data in
> the
> >>> engine, similar to the following:
> >>> class Level { double value;Calendar date; }
> >>> this class contains some values at specific time points (both in the
> >>> past
> >>> and in the future).
> >>>
> >>> I would like to be able create a decision table based on the "current"
> >>> time
> >>> (plus or minus a variable offset) and the value of the closest Level to
> >>> that
> >>> time point.
> >>>
> >>> For example, assuming it is '2014-11-03 19:10:00' and the level objects
> >>> in
> >>> the session currently are:
> >>> '1.0 2014-11-03 18:00:00' and '2.0 2014-11-03 19:00:00',
> >>>
> >>> I would want a rule to say that if current level value is 2.0 then do
> >>> some
> >>> stuff and it would make a match.
> >>>
> >>> I would really appreciate any help on how to overcome this issue, as
> >>> well
> >>> as
> >>> any good examples/tutorials regarding this.
> >>>
> >>> Kind regards.
> >>>
> >>>
> >>>
> >>>
> >>> --
> >>> View this message in context:
> >>>
> http://drools.46999.n3.nabble.com/Temporal-rules-in-decision-table-tp4028638.html
> >>> Sent from the Drools: User forum mailing list archive at Nabble.com.
> >>> ___
> >>> rules-users mailing list
> >>> rules-users@lists.jboss.org
> >>> https://lists.jboss.org/mailman/listinfo/rules-users
> >>>
> >>
> >>
> >> ___
> >> rules-users mailing list
> >> rules-users@lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >>
> >
>
> ___
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
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Re: [rules-users] Temporal rules in decision table
You can create a rule with a timer to update Current with the required
frequency.
rule "set current"
timer (int: 1s 1s)
no-loop
when
$c: Current()
then
modify( $c ){ setXYZ(whatever) }
end
On 11/03/2014, Ioannis Christodoulou wrote:
> Thanks a lot for the prompt reply and the detailed example!
> It took me some time but I managed to convert it to a working xls decision
> table.
>
> Now, I wanted to figure out how to automatically update the Current object
> regularly, in order to re-calculate the rules over time.
> My application is a java ee one. Would creating a @schedule on a singleton
> method be a good solution, or is there another better advice for it?
>
> Thanks again!
>
> Ευχαριστώ πολύ,
>Ιωάννης Χριστοδούλου
>
>
> On Tue, Mar 11, 2014 at 8:50 PM, Wolfgang Laun
> wrote:
>
>> As you have Level with a field date, you can access that point in time in
>> milliseconds, using getTimeInMillis(). For the current time, you might
>> insert an object of class Current with a member now of class Calendar.
>>
>> rule closest
>> when
>> Current( $now: now )
>> $level: Level( $value == 2, $date: date )
>> not $x: Level( Math.abs( $x.getDate().getTimeInMillis() -
>> $now.getTimeInMillis() ) < Math.abs( $date.getTimeInMillis() -
>> $now.getTimeInMillis() ) )
>> then
>> // $level is the Level fact closest to Current with a level of 2
>> end
>>
>> Untested. If the long expression gives you trouble, try enclosing it in
>> eval(...).
>> -W
>>
>>
>> On 11 March 2014 18:14, JChrist wrote:
>>
>>> Hello everyone,
>>> I was messing with drools v6.0.1.Final the past week and I have not been
>>> able to completely understand how to integrate the rule engine to my
>>> specification.
>>>
>>> For the needs of my project, I want to regularly insert some data in the
>>> engine, similar to the following:
>>> class Level { double value;Calendar date; }
>>> this class contains some values at specific time points (both in the
>>> past
>>> and in the future).
>>>
>>> I would like to be able create a decision table based on the "current"
>>> time
>>> (plus or minus a variable offset) and the value of the closest Level to
>>> that
>>> time point.
>>>
>>> For example, assuming it is '2014-11-03 19:10:00' and the level objects
>>> in
>>> the session currently are:
>>> '1.0 2014-11-03 18:00:00' and '2.0 2014-11-03 19:00:00',
>>>
>>> I would want a rule to say that if current level value is 2.0 then do
>>> some
>>> stuff and it would make a match.
>>>
>>> I would really appreciate any help on how to overcome this issue, as
>>> well
>>> as
>>> any good examples/tutorials regarding this.
>>>
>>> Kind regards.
>>>
>>>
>>>
>>>
>>> --
>>> View this message in context:
>>> http://drools.46999.n3.nabble.com/Temporal-rules-in-decision-table-tp4028638.html
>>> Sent from the Drools: User forum mailing list archive at Nabble.com.
>>> ___
>>> rules-users mailing list
>>> rules-users@lists.jboss.org
>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>>
>>
>>
>> ___
>> rules-users mailing list
>> rules-users@lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
___
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Re: [rules-users] Temporal rules in decision table
Thanks a lot for the prompt reply and the detailed example!
It took me some time but I managed to convert it to a working xls decision
table.
Now, I wanted to figure out how to automatically update the Current object
regularly, in order to re-calculate the rules over time.
My application is a java ee one. Would creating a @schedule on a singleton
method be a good solution, or is there another better advice for it?
Thanks again!
Ευχαριστώ πολύ,
Ιωάννης Χριστοδούλου
On Tue, Mar 11, 2014 at 8:50 PM, Wolfgang Laun wrote:
> As you have Level with a field date, you can access that point in time in
> milliseconds, using getTimeInMillis(). For the current time, you might
> insert an object of class Current with a member now of class Calendar.
>
> rule closest
> when
> Current( $now: now )
> $level: Level( $value == 2, $date: date )
> not $x: Level( Math.abs( $x.getDate().getTimeInMillis() -
> $now.getTimeInMillis() ) < Math.abs( $date.getTimeInMillis() -
> $now.getTimeInMillis() ) )
> then
> // $level is the Level fact closest to Current with a level of 2
> end
>
> Untested. If the long expression gives you trouble, try enclosing it in
> eval(...).
> -W
>
>
> On 11 March 2014 18:14, JChrist wrote:
>
>> Hello everyone,
>> I was messing with drools v6.0.1.Final the past week and I have not been
>> able to completely understand how to integrate the rule engine to my
>> specification.
>>
>> For the needs of my project, I want to regularly insert some data in the
>> engine, similar to the following:
>> class Level { double value;Calendar date; }
>> this class contains some values at specific time points (both in the past
>> and in the future).
>>
>> I would like to be able create a decision table based on the "current"
>> time
>> (plus or minus a variable offset) and the value of the closest Level to
>> that
>> time point.
>>
>> For example, assuming it is '2014-11-03 19:10:00' and the level objects in
>> the session currently are:
>> '1.0 2014-11-03 18:00:00' and '2.0 2014-11-03 19:00:00',
>>
>> I would want a rule to say that if current level value is 2.0 then do some
>> stuff and it would make a match.
>>
>> I would really appreciate any help on how to overcome this issue, as well
>> as
>> any good examples/tutorials regarding this.
>>
>> Kind regards.
>>
>>
>>
>>
>> --
>> View this message in context:
>> http://drools.46999.n3.nabble.com/Temporal-rules-in-decision-table-tp4028638.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
>> ___
>> rules-users mailing list
>> rules-users@lists.jboss.org
>> https://lists.jboss.org/mailman/listinfo/rules-users
>>
>
>
> ___
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
___
rules-users mailing list
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Re: [rules-users] Temporal rules in decision table
As you have Level with a field date, you can access that point in time in
milliseconds, using getTimeInMillis(). For the current time, you might
insert an object of class Current with a member now of class Calendar.
rule closest
when
Current( $now: now )
$level: Level( $value == 2, $date: date )
not $x: Level( Math.abs( $x.getDate().getTimeInMillis() -
$now.getTimeInMillis() ) < Math.abs( $date.getTimeInMillis() -
$now.getTimeInMillis() ) )
then
// $level is the Level fact closest to Current with a level of 2
end
Untested. If the long expression gives you trouble, try enclosing it in
eval(...).
-W
On 11 March 2014 18:14, JChrist wrote:
> Hello everyone,
> I was messing with drools v6.0.1.Final the past week and I have not been
> able to completely understand how to integrate the rule engine to my
> specification.
>
> For the needs of my project, I want to regularly insert some data in the
> engine, similar to the following:
> class Level { double value;Calendar date; }
> this class contains some values at specific time points (both in the past
> and in the future).
>
> I would like to be able create a decision table based on the "current" time
> (plus or minus a variable offset) and the value of the closest Level to
> that
> time point.
>
> For example, assuming it is '2014-11-03 19:10:00' and the level objects in
> the session currently are:
> '1.0 2014-11-03 18:00:00' and '2.0 2014-11-03 19:00:00',
>
> I would want a rule to say that if current level value is 2.0 then do some
> stuff and it would make a match.
>
> I would really appreciate any help on how to overcome this issue, as well
> as
> any good examples/tutorials regarding this.
>
> Kind regards.
>
>
>
>
> --
> View this message in context:
> http://drools.46999.n3.nabble.com/Temporal-rules-in-decision-table-tp4028638.html
> Sent from the Drools: User forum mailing list archive at Nabble.com.
> ___
> rules-users mailing list
> rules-users@lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
___
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