]
Hiroko Miura commented on DROOLS-4898:
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[~mfusco] Thank you for your clarification. I thought that retracting object of same type
is enough to re-evaluation of existing facts as property 'longVal' in this
reproducer (which is compared in accumulate function) is not changed.
Accumulates: min does not work after retracting fact.
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Key: DROOLS-4898
URL:
https://issues.redhat.com/browse/DROOLS-4898
Project: Drools
Issue Type: Bug
Components: core engine
Affects Versions: 7.26.0.Final, 7.31.0.Final
Reporter: Hiroko Miura
Assignee: Mario Fusco
Priority: Major
Labels: support
The following rules does not work with specific facts.
{noformat}
rule "rule1_long"
when
accumulate( Fact( $longVal: longVal), $minVal : min($longVal))
accumulate( Fact( $longVal2: longVal, $longVal2 > $minVal), $minVal2 :
min($longVal2))
$minFact: Fact( longVal == $minVal)
$minFact2: Fact( longVal == $minVal2)
then
System.out.println("Rule ["+kcontext.getRule().getName()+ "]
fires!");
Long $diff = (Long)$minVal2 - (Long)$minVal;
$minFact2.setDiff($diff);
// update($minFact2);
String errmsg = $diff == 0? " !!!!! ERROR !!!!!" : "";
System.out.println( drools.getRule().getName() + " diff:" +
$minFact2.getLongVal() + " - " + $minFact.getLongVal() + " = " +
$diff + errmsg);
System.out.println("\tretract <= "+$minFact );
retract($minFact);
end
{noformat}
There seems to be 2 kind of issues (root cause might be same though).
- 2nd accumulate return same min value with 1st one.
- rule fire count is less than expected.
This does not work with specific set of facts, but works with another set of facts.
If update is called for the fact like above commented out line, this does not happen.