Multiple Insert and negative rule
by annam2011
Hello,
I'm a newbie to drools.
I would like to know why i get the following output on the console :
Test Message found!!
No strange message :-)
Test Message found!!
Test Message found!!
NotifyEngineTest.java creates 10 events. Rule "test2" should be activated
with every event,
so that the output should look like this:
Test Message found!!
No strange message :-)
Test Message found!!
No strange message :-)
Test Message found!!
No strange message :-)
Could somebody help me with this ?
I appriciate your help
Thanks in advance,
Anna
// NotifyEngineTest.java//
for (int i = 0; i < 10; i++){
Event e = new Event();
e.setId("ID"+Math.random());
e.setTimestamp(new Date());
e.setCatagory("TEST");
e.setMessage( i + " Test");
e.setSystem("localhost");
ruleEngine.insert(e);
_____________________________________________________________________
// RuleEngine.java//
public void insert(Event e) throws RuleEngineException {
FactHandle factHandle = ksession.insert(e);
int numberOfRules = ksession.fireAllRules();
logger.debug("Rules fired: "+numberOfRules);
}
______________________________________________________________________
// Notify.drl//
rule "test"
salience 10
when
$r: Event(message matches ".*Test.*")
then
System.out.println("Test Message found!! "+ $r);
end
rule "test2"
salience 5
when
not ( Event( (system == "anySystem" && catagory == "anyCatagory" ) ||
(system == "anyHost" && message matches ".*Hello.*")))
then
System.out.println(" No strange message :-) ");
end
____________________________________________________________________
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14 years, 10 months
How to use contains with a function
by Hezi Stern
Hi all,
I encountered the following issue:
As an example TaskConectxt() holds a list of time related objects called
times.
I would like to write a rule which ideally would filter the TaskContext
according to a specific time object.
The problematic restriction is that this time object is derived using a
helper function (imported), in this case called getTimeByID which received
as input an enum ID of a time and returns the desired time object.
Ideally the rule would like something like this:
rule "verify time"
when
$tc: TaskContext(times contains
getTimeByID(ETimeID.NOW))
then
//something
end
unfortunately this does not work.
Is there any way to call a function with a param?
Is there a better alternative method than this one?
Thanks,
Hezi
14 years, 10 months
Rules that cumulate on consequence
by lansyj
hi folks
We are working on a requirement that requires us to have multiple rules that
could fire for a given input and for all the rules that fire, we would want
to cumulate the consequence to reach the final consequence.
As an example, if we want to identify the credit score for a person, based
on his gender you might want to assign/increment/decrement the score, then
based on nationality, and so on.
So, considering the long list of such criteria, having rules that cover all
scenarios and are still mutually exclusive isnt a scalable solution. Could
you please advice on how this could be achieved.
We run Drools 5.1.1 and Guvnor; rules are made using the guided editor with
DSLs.
Awaiting your support,
Best Regards
-lj
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14 years, 10 months
How to import Declarative model from Guvnor to eclispe ?
by Manohar Kokkula
Hi to All,
I am new to Guvnor.
I want to import Declarative model from Guvnor into Eclipse. How can I
declare it in
eclipse?.
I used API's from BRMS userguide, but i am unable to get it.
Please guide me in proper way.
Thanks,
Manohar Kokkula
Mailto: manohar.kokkula(a)tcs.com
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14 years, 10 months
Rules called with null references?
by Robert Crawford
I have this rule:
rule "Defrost: Turned On"
when
$reading : SwitchReading( switchOn == true ) from entry-point
"ReadingsStream"
not SwitchReading (this.circuit == $reading.circuit, this after $reading
) from entry-point "ReadingsStream"
not DefrostSwitchOn(this.circuit == $reading.circuit)
then
LOG.info("Defrost switch turned on by reading '" + $reading + "'.");
insert(new DefrostSwitchOn($reading));
end
SwitchReading is an event; DefrostSwitchOn is a POJO fact.
Multiple times I've gotten exceptions where this rule's RHS is called with a
null. The ConsequenceExceptionHandler is supposed to list the facts the RHS
was called with, but it's getting an empty list.
Now, I know my system as it currently stands can take a LONG time between
receiving an event and executing the consequence, primarily when it first
starts and is loading its previous known state. It's entirely believable to
me that the event will have expired before the rule's RHS is called. But
shouldn't the event still be referenced by the Activation?
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14 years, 10 months
