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Mark
siddhartha banik wrote:
Hi All,
I am using Drools Stateful session with serialized Rule Base & Working
memory for my application. I need to write some rule which will *only*
fire on newly inserted data points in Working Memory. Does Drools
support any such feature which will help me to achieve this ? Any
suggestion, how can I achieve this efficiently?
As sample, I have written a rule bellow:
global RuleSetOutput ruleSetOutput
rule "sample_rule"
when
(p4: DataObject(id == 4, stringValue == "230007014")) and
(p14: DataObject(id == 14, stringValue == "230007004")) and
(p10: DataObject(id == 10, stringValue == "230007005")) and
(p11: DataObject(id == 11, stringValue == "230007006")) and
(p12: DataObject(id == 12, stringValue == "230007007")) and
(p13: DataObject(id == 13, stringValue == "230007008"))
then
String ruleID = "sample_rule";
RuleOutput ruleOutput =
RuleEngineHelper.getRuleOutput(ruleSetOutput, ruleID);
ruleOutput.addDataObject(p13);
ruleOutput.addDataObject(p4);
ruleOutput.addDataObject(p11);
ruleOutput.addDataObject(p14);
ruleOutput.addDataObject(p10);
ruleOutput.addDataObject(p12);
end
For 1st execution, I am inserting 6 matching DataObjects into Working
Memory. Rule is getting fired once & those 6 data points are getting
added into RuleOutput.
But in subsequent rule executions after I insert 6 more matching
DataObjects into Working Memory, Rule is getting fired couple of
times & objects from old executions also getting appended to the
current RuleOutput.
How can I avoid this ?
Regards
Siddhartha
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