9:28 a.m.
Hi all,
It is 2 days I am fighting with a strange behaviour of insertLogical in rules having from
pattern in conditions : it works the first time, and not after ...
-----------------------------------------
Here is my use-case (simplified) :
I have a class that represent a Flight. A Flight has a start/end datetime and is
associated with a Airplane and a list of Crew :
class Flight {
String airplaneId;
List<String> crewIds;
Date start;
Date end;
}
I want to maintain an alert list that contains all overlaps for each airplane and each
crew. So I have rules like:
rule "Overlap Airplane"
when
$f1 : Flight($airplaneId : airplaneId)
$f2 : Flight(this != $1, airplaneId == $airplaneId, ... and periods intersecting ... )
then
insertLogical(new Alert(...));
end
rule "Overlap Crews"
when
$f1 : Flight()
$crew : String from $f1.getCrewIds()
$f2 : Flight(this != $1, eval($f2.getCrewIds().contains($crew)) , ... and periods
intersecting ... )
then
insertLogical(new Alert(...));
end
-----------------------------------------
Ok. So what I do to test all that stuff :
- create a new session
- add a first single Flight --> no alerts at all, normal
- add a second Flight insersecting the first one with same airplane and same crews list
--> 3 new alerts inserted (one for airplane, one for each crew) : normal
- remove this second Flight --> the 3 preivous alerts are retracted : still ok
- re-add this second Flight --> only the 'airplane' rule triggers, I only get
one new alert insteads of the previous same 3 .... The alerts not inserted correspond to
the rule having 'from' in it
-----------------------------------------
To test that it is the source of the problem, I add a new explicit association object that
I insert in WM :
class CrewAffectation {
String idCrew;
String idFlight;
}
For each inserted Flight, I also insert corresponding new CrewAffectation objects. (in
case of retract, I retract them of course).
I change the last rule to something like :
rule "Overlap Crews"
when
$f1 : Flight($id1 : id
$f2 : Flight(this != $1, $id2 : id, ... and periods intersecting ... )
$crewAff1 : CrewAffectation($idCrew : idCrew, idFlight== $id1)
$crewAff2 : CrewAffectation(idCrew == $idCrew, idFlight== $id2)
then
insertLogical(new Alert(...));
end
And with this 'no-from' approach, everything is working as expected.
-----------------------------------------
In addition, I suspect the truth maintenance system to have leaks, and notably in the
source kBase.
Why ? Because I was facing problems by reusing the same kBase to generate multiples
kSessions : The first session created reacted well, while all the folowing not.
And it was in fact the same problem as the one described here : usage of from and
insertLogical in the same rule.
The first created session adds and retract my 3 alerts, the second created session only
adds the airplane alert.
With using the explicit association object, I can reuse my kBase and everything is working
well.
-----------------------------------------
Does someone already faced the problem ?
Does it looks like a real bug to dev team or am I doing something wrong (but as it work
once, I guess it is a bug) ?
Vincent
9:31 a.m.
Forgot to say : using drools 5.6.FINAL
----- Mail original -----
De: "Vincent LEGENDRE" <vincent.legendre(a)eurodecision.com>
À: "Rules Users List" <rules-users(a)lists.jboss.org>
Envoyé: Jeudi 28 Août 2014 15:28:49
Objet: [rules-users] Inconsistent behaviour of insertLogical in rules having from pattern
Hi all,
It is 2 days I am fighting with a strange behaviour of insertLogical in rules having from
pattern in conditions : it works the first time, and not after ...
-----------------------------------------
Here is my use-case (simplified) :
I have a class that represent a Flight. A Flight has a start/end datetime and is
associated with a Airplane and a list of Crew :
class Flight {
String airplaneId;
List<String> crewIds;
Date start;
Date end;
}
I want to maintain an alert list that contains all overlaps for each airplane and each
crew. So I have rules like:
rule "Overlap Airplane"
when
$f1 : Flight($airplaneId : airplaneId)
$f2 : Flight(this != $1, airplaneId == $airplaneId, ... and periods intersecting ... )
then
insertLogical(new Alert(...));
end
rule "Overlap Crews"
when
$f1 : Flight()
$crew : String from $f1.getCrewIds()
$f2 : Flight(this != $1, eval($f2.getCrewIds().contains($crew)) , ... and periods
intersecting ... )
then
insertLogical(new Alert(...));
end
-----------------------------------------
Ok. So what I do to test all that stuff :
- create a new session
- add a first single Flight --> no alerts at all, normal
- add a second Flight insersecting the first one with same airplane and same crews list
--> 3 new alerts inserted (one for airplane, one for each crew) : normal
- remove this second Flight --> the 3 preivous alerts are retracted : still ok
- re-add this second Flight --> only the 'airplane' rule triggers, I only get
one new alert insteads of the previous same 3 .... The alerts not inserted correspond to
the rule having 'from' in it
-----------------------------------------
To test that it is the source of the problem, I add a new explicit association object that
I insert in WM :
class CrewAffectation {
String idCrew;
String idFlight;
}
For each inserted Flight, I also insert corresponding new CrewAffectation objects. (in
case of retract, I retract them of course).
I change the last rule to something like :
rule "Overlap Crews"
when
$f1 : Flight($id1 : id
$f2 : Flight(this != $1, $id2 : id, ... and periods intersecting ... )
$crewAff1 : CrewAffectation($idCrew : idCrew, idFlight== $id1)
$crewAff2 : CrewAffectation(idCrew == $idCrew, idFlight== $id2)
then
insertLogical(new Alert(...));
end
And with this 'no-from' approach, everything is working as expected.
-----------------------------------------
In addition, I suspect the truth maintenance system to have leaks, and notably in the
source kBase.
Why ? Because I was facing problems by reusing the same kBase to generate multiples
kSessions : The first session created reacted well, while all the folowing not.
And it was in fact the same problem as the one described here : usage of from and
insertLogical in the same rule.
The first created session adds and retract my 3 alerts, the second created session only
adds the airplane alert.
With using the explicit association object, I can reuse my kBase and everything is working
well.
-----------------------------------------
Does someone already faced the problem ?
Does it looks like a real bug to dev team or am I doing something wrong (but as it work
once, I guess it is a bug) ?
Vincent
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
3:21 p.m.
This list is now closed.
Please use the google group:
https://groups.google.com/forum/#!forum/drools-usage
Are the auto-responders informing people that the list is closed working?
Mark
On 28 Aug 2014, at 14:31, Vincent LEGENDRE <vincent.legendre(a)eurodecision.com>
wrote:
Forgot to say : using drools 5.6.FINAL
De: "Vincent LEGENDRE" <vincent.legendre(a)eurodecision.com>
À: "Rules Users List" <rules-users(a)lists.jboss.org>
Envoyé: Jeudi 28 Août 2014 15:28:49
Objet: [rules-users] Inconsistent behaviour of insertLogical in rules having from
pattern
Hi all,
It is 2 days I am fighting with a strange behaviour of insertLogical in rules having from
pattern in conditions : it works the first time, and not after ...
-----------------------------------------
Here is my use-case (simplified) :
I have a class that represent a Flight. A Flight has a start/end datetime and is
associated with a Airplane and a list of Crew :
class Flight {
String airplaneId;
List<String> crewIds;
Date start;
Date end;
}
I want to maintain an alert list that contains all overlaps for each airplane and each
crew. So I have rules like:
rule "Overlap Airplane"
when
$f1 : Flight($airplaneId : airplaneId)
$f2 : Flight(this != $1, airplaneId == $airplaneId, ... and periods intersecting
... )
then
insertLogical(new Alert(...));
end
rule "Overlap Crews"
when
$f1 : Flight()
$crew : String from $f1.getCrewIds()
$f2 : Flight(this != $1, eval($f2.getCrewIds().contains($crew)) , ... and periods
intersecting ... )
then
insertLogical(new Alert(...));
end
-----------------------------------------
Ok. So what I do to test all that stuff :
- create a new session
- add a first single Flight --> no alerts at all, normal
- add a second Flight insersecting the first one with same airplane and same crews list
--> 3 new alerts inserted (one for airplane, one for each crew) : normal
- remove this second Flight --> the 3 preivous alerts are retracted : still ok
- re-add this second Flight --> only the 'airplane' rule triggers, I only
get one new alert insteads of the previous same 3 .... The alerts not inserted correspond
to the rule having 'from' in it
-----------------------------------------
To test that it is the source of the problem, I add a new explicit association object
that I insert in WM :
class CrewAffectation {
String idCrew;
String idFlight;
}
For each inserted Flight, I also insert corresponding new CrewAffectation objects. (in
case of retract, I retract them of course).
I change the last rule to something like :
rule "Overlap Crews"
when
$f1 : Flight($id1 : id
$f2 : Flight(this != $1, $id2 : id, ... and periods intersecting ... )
$crewAff1 : CrewAffectation($idCrew : idCrew, idFlight== $id1)
$crewAff2 : CrewAffectation(idCrew == $idCrew, idFlight== $id2)
then
insertLogical(new Alert(...));
end
And with this 'no-from' approach, everything is working as expected.
-----------------------------------------
In addition, I suspect the truth maintenance system to have leaks, and notably in the
source kBase.
Why ? Because I was facing problems by reusing the same kBase to generate multiples
kSessions : The first session created reacted well, while all the folowing not.
And it was in fact the same problem as the one described here : usage of from and
insertLogical in the same rule.
The first created session adds and retract my 3 alerts, the second created session only
adds the airplane alert.
With using the explicit association object, I can reuse my kBase and everything is
working well.
-----------------------------------------
Does someone already faced the problem ?
Does it looks like a real bug to dev team or am I doing something wrong (but as it work
once, I guess it is a bug) ?
Vincent
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
_______________________________________________
rules-users mailing list
rules-users(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
3528
days inactive
3528
days old
2 comments
2 participants
participants (2)
-
Mark Proctor -
Vincent LEGENDRE