Hello,
If you
can change the code for CreatedFact and let it have a reference to UserFact and
change the rule to:
rule "fact =
1"
when
$f :
UserFact(fact1 == 1);
then
insertLogical(new
CreatedFact($f));
end
you
will also have to overide equals and hashcode for CreatedFact so that several
CreatedFacts referencing the same UserFact are considered
equal...
But
with this solution CreatedFact will always be up to date with the value of
UserFact even without firing the rules and maybe it's not what you
want...
-Patrick
Hello,
I am a bit confused about how insertLogical()
supposed to work in drools 5.
when i have a rule such as:
rule
"fact = 1"
when
$f : UserFact(fact1 == 1);
then
insertLogical(new
CreatedFact($f.getFact2()));
end
now i change $f in such a way, that the rule will fire
again.
via
// build first version
UserFact f = new
UserFact();
f.setFact1(1);
f.setFact2(1);
memory.insert(f);
memory.fireAllRules();
// <- Rule fires once
// now i change the memory and fire the rules
again
memory.modifyRetract(f) ;
f.setFact2(100); // <- changing
$f, but leaving fact1 as it
is.
memory.modifyInsert(f);
memory.fireAllRules(); // <-
Rule fires again
now the rule should fire again, which it does.
but
i end up with two CreatedFact instances in the workingMemory..
one with the
old OtherFact value 1, and one with the new value, 100
but i want only
the second instance. the one created first is not valid any more.
i could
write an extra rule for retracting the first CreatedFact-fact, but then i
would have
a very tight coupling of the two rules.
is there a
better way?
it seems odd to me, that a consequence of a rule stays in
memory, when there is
a more current version of the rule evocation with the
_same_ facts in the precondition
and a different consequence.
thanks
in advance, tim