Re: [rules-users] Searching for an object in a list inside a map
Hi! You could try something like this. I'm not 100% sure that this works: $player : Player(name == John) $roster : TeamRoster($teams : teams, $teams.get(Dodgers) contains $player) -Jarkko -- View this message in context: http://drools.46999.n3.nabble.com/rules-users-Searching-for-an-object-in-a-list-inside-a-map-tp4030156p4030164.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] NullPointerException with factType.get(fact, fieldname)
Manstis was right, I was trying to access Java class with the API for accessing declared (DRL) types. ValidationError class was created with Drools Workbench data modeller. I thought that data modeller creates declarative classes, like in Drools Guvnor. I imported ValidationError as normal Java class and and started to use as it as normal Java class and problem was solved. Sorry for all the trouble and thanks for help! -Jarkko -- View this message in context: http://drools.46999.n3.nabble.com/NullPointerException-with-factType-get-fact-fieldname-tp4028688p4028753.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] NullPointerException with factType.get(fact, fieldname)
I have this problem also with drools versions 6.0.1.FINAL and 6.1.0.Beta1 org.kie.api.definition.type.FactType.get(Object bean, String field) gives NullPointerException with default KieBase KieContainer kContainer = kieServices.newKieContainer(kieServices.newReleaseId(com.test, validationrules, 1.0-SNAPSHOT)); KieBase kbase = kContainer.getKieBase(); -Jarkko -- View this message in context: http://drools.46999.n3.nabble.com/NullPointerException-with-factType-get-fact-fieldname-tp4028688p4028731.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] NullPointerException with factType.get(fact, fieldname)
Drools version 6.0.0.FINAL
I create rule package in Drools workbench and use default knowledgebase and
session:
KieServices kieServices = KieServices.Factory.get();
KieContainer kContainer =
kieServices.newKieContainer(kieServices.newReleaseId(com.test,
validationrules, 1.0-SNAPSHOT));
KieBase kbase = kContainer.getKieBase();
KieSession ksession = kContainer.newKieSession();
I have a query that returns ValidationError:
query getValidationErrors
validationError: ValidationError()
end
ValidationError is returned and it has values in its fields, but when i try
to read fields of that ValidationError fact, i get NullPointerException
public class DroolsValidationMessage {
private FactType factType;
private Object fact;
public DroolsValidationMessage(KieBase kbase, Object fact) {
this.fact = fact;
factType = kbase.getFactType(fact.getClass().getPackage().getName(),
fact.getClass().getSimpleName());
}
public String getSeverity() {
return (String) factType.get(fact, severity); // --
java.lang.NullPointerException
}
public String getDescription() {
return (String) factType.get(fact, description);
}
}
factType looks like this:
ClassDefinition{className='null', superClass='java.lang.Object',
interfaces=[], definedClass=class com.test.validationrules.ValidationError,
traitable=null, abstract=false,
fields={description=FieldDefinition{name='description',
type='java.lang.String', key=false, inherited=false, index=0,
initExpr='null', annotations=null, accessor=null},
severity=FieldDefinition{name='severity', type='java.lang.String',
key=false, inherited=false, index=1, initExpr='null', annotations=null,
accessor=null}
This works if the rules and declared class is in resources folder and
kmodule.xml is used.
KieServices kieServices = KieServices.Factory.get();
KieContainer kContainer = kieServices.getKieClasspathContainer();
KieBase kbase = kContainer.getKieBase(kbase);
KieSession ksession = kContainer.newKieSession(ksession);
factType looks like this:
ClassDefinition{className='com.test.validationrules.ValidationError',
superClass='java.lang.Object', interfaces=[java.io.Serializable],
definedClass=class com.test.validationrules.ValidationError, traitable=NONE,
abstract=false, fields={description=FieldDefinition{name='description',
type='java.lang.String', key=false, inherited=false, index=0,
initExpr='null', annotations=null, accessor=[ClassFieldExtractor
class=com.test.validationrules.ValidationError field=description]},
severity=FieldDefinition{name='severity', type='java.lang.String',
key=false, inherited=false, index=1, initExpr='null', annotations=null,
accessor=[ClassFieldExtractor class=com.test.validationrules.ValidationError
field=severity]}
-Jarkko
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[rules-users] Drools 6.0.1: GC overhead limit exceeded, even though objects are retracted
We have a program that validates large amount of data. When changing this
program to use drools 6.0.1 instead of 5.5.0, this GC overhead limit
exceeded problem occurred.
Program reads one object to memory, then validate it and then retract it.
This is repeated thousands of times.
java version 1.7.0_45
java options:
JVM_ARGS=$JVM_ARGS -Xmx256m
JVM_ARGS=$JVM_ARGS -XX:+HeapDumpOnOutOfMemoryError
JVM_ARGS=$JVM_ARGS -XX:HeapDumpPath=/home/heapdumps
I also tried different java garbage collection options: -XX:+UseSerialGC,
-XX:+UseParallelGC and -XX:+UseConcMarkSweepGC, but it did not help.
Heapdump says that:
One instance of org.drools.core.reteoo.JoinNodeLeftTuple loaded by
sun.misc.Launcher$AppClassLoader @ 0xf03a13a8 occupies 203,920,080
(98.40%) bytes.
This error is reproduced with rules below. These rules add one object to
memory, then there is one rule that evaluates that object, and after that
the object is retracted. This is repeated in continuous loop, but memory
runs out soon.
package com.cat
declare ValidationError
jee : String
end
declare cat2
name : String
age : Integer
end
rule 'add cat2'
dialect 'mvel'
salience 3000
when
not(exists(cat2()))
then
System.out.println(insert cat2);
$p = new cat2()
insert ($p);
modify ($p){
name = mau
};
end
rule 'this rule does not fire'
dialect 'mvel'
salience 4500
when
$k1 : cat2($name : name != miau)
$k2 : cat2($nameofcat2 : name == miau)
then
modify ($k1){
name = $nameofcat2
};
modify ($k2){
name = (miau)
};
System.out.println(this rule does not fire);
end
rule 'retract cat2'
dialect 'mvel'
salience -50
when
$c2 : cat2()
then
retract($c2);
System.out.println(retract cat2);
end
query getValidationErrors
validationError: ValidationError()
end
--
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