Not Able to create a cindition BRL fragment
by Aditi Hardas
Hi ,
I am using Drool Guvnor 5.5 along with IE 9 and Tomcat 7.0.32. I have
successfully deployed Guvnor in Tomcat.In next step I have created a package
then add a new category and added a rule with Decision Table (web - guided
rule ) as a rule formate.I was able to create a rule with certain set of
conditions and actions.On clicking Include Advance Option and choose *Add a
condition BRL fragment* or *Add an action BRL fragment*, I am getting java
script error and nothing is moving forword after that. That mean I am not
able to add and BRL fragment to my rule.
Can any one help me for this. Does I am doing any thing wrong.
Thx in advance.
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13 years, 2 months
How can I select planning-entities in the accumulate source-pattern based on a list of planning-variables?
by Michiel Vermandel
Hi,
I am kind of stuck in writing a rule :
I have PeopleMatch facts in working memory.
Each PeopleMatch has a number of persons: PeopleMatch().getPeople = List<Person>
I have planning-entities (Tasks) which have a planning-variable Person.
Now I would like to create a rule to loop over the PeopleMatch objects, gather all Tasks for the people of this match and do some calculation with all tasks.
This is what I have for the moment:
rule "matchPeopleTasks"
when
$match : PeopleMatch()
$people : List() from $match .people
$match: Number( intValue < 0 )
from accumulate( $task : Task(handler == $people),
init( Matcher matcher = $match.getMatcher()),
action( matcher.addTask( $task ); ),
reverse( matcher.removeTask( $task ); ),
result( matcher.getMatch() ) );
then
...
end
The problem area is of course the "accumulate( $task : ProjectTask(handler == $people),"
How do I select all tasks in the accumulate function, based on a list of people?
Thanks,
Michiel
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13 years, 3 months
Implementing Refraction with Drools
by magaram
I believe we can inject in Refraction capabilities into Drools Rule Engine
using a simple Agenda Filter. I have tested this with test cases against
JRules and Drools and get similar results. Without the Refraction Agenda
Filter it loops infinitely as expected.
Please try it out and tell me what you think. I believe refraction is a much
needed feature of a forward chaining rule engine for commercial purposes.
Any feedback is deeply appreciated.
Here is what the code looks like
---------Agenda Filter---------------------------
package test;
import java.util.ArrayList;
import java.util.List;
import org.drools.runtime.rule.Activation;
import org.drools.runtime.rule.AgendaFilter;
/**
* This custom agenda filter injects refraction behavior into the rule engine
* @author Mukundan Agaram
*
*/
public class RefractionAgendaFilter implements AgendaFilter {
private List encounteredActivations = new ArrayList();
@Override
public boolean accept(Activation act)
{
//Check for a Refraction
if (encounteredActivations.contains(act))
{
//Remove from encountered activations for future firing
encounteredActivations.remove(act);
//return false so the rule is not selected as part of the refraction
return false;
}
//Otherwise add the rule to check for potential refractions in the future
encounteredActivations.add(act);
//select the rule to be part of the agenda
return true;
}
}
-----------------DRL------------------------
//created on: Jan 15, 2013
package test
dialect "mvel"
rule testFooBar1
salience 100
when
$foo : Foo()
$bar : Bar(y > 0)
then
$foo.setX(($foo.getX() + $bar.getY()));
System.out.println("Fired "+drools.getRule().getName())
update($foo);
end
rule testFooBar2
salience 150
when
$foo : Foo(x >= 6)
then
System.out.println("Fired "+drools.getRule().getName())
end
rule testFooBar3
salience 50
when
$foo : Foo(x >= 7)
then
System.out.println("Fired "+drools.getRule().getName())
end
----------------Runtime execution code--------------------------
package test;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class TestFooBarMain {
private static void test()
{
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( "TestFooBar.drl",
TestFooBarMain.class ),
ResourceType.DRL );
if ( kbuilder.hasErrors() ) {
System.out.println( kbuilder.getErrors().toString() );
}
else
{
System.out.println("DRL parsing - success!");
}
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
Foo foo1 = new Foo();
foo1.setX(6);
Bar bar1 = new Bar();
bar1.setY(3);
ksession.insert(foo1);
ksession.insert(bar1);
ksession.fireAllRules(new RefractionAgendaFilter());
}
/**
* @param args
*/
public static void main(String[] args) {
test();
}
}
----------------Facts-------------------------
package test;
public class Foo {
private int x;
private int y;
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
}
package test;
public class Bar {
public int getX() {
return x;
}
public void setX(int x) {
this.x = x;
}
public int getY() {
return y;
}
public void setY(int y) {
this.y = y;
}
private int x;
private int y;
}
Thanks,
Mukundan Agaram
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13 years, 3 months
Question about drools-spring in a multi-treaded container (like tomcat).
by Gurvinder Narula1
Hello all,
I've been reading up about drool-spring integration and have put together a simple project that wires together a KnowledgeBase and KnowledgeSession as follows :
<drools:resource id="GroupUnit" type="DRL"
source="file:/Users/drools/drools-spring-test/src/Rules/drls/GroupUnit.drl" />
<drools:resource id="GradeUnit" type="DRL"
source="file:/Users/drools/drools-spring-test/src/Rules/drls/GradeUnit.drl"" />
<drools:resource id="EvaluateUnit" type="DRL"
source="file:/Users/drools/drools-spring-test/src/Rules/drls/EvaluateUnit.drl"" />
<drools:grid-node id="node1" />
<drools:kbase id="kbase1" node="node1">
<drools:resources>
<drools:resource ref="GroupUnit" />
<drools:resource ref="GradeUnit" />
<drools:resource ref="EvaluateUnit" />
</drools:resources>
</drools:kbase>
<drools:ksession id="ksession" type="stateful" kbase="kbase1"
node="node1" />
Then in my Controller call, I 'AutoWire' in the StatefulKnowledgeSession as follows :
@Controller
@RequestMapping( value = "foo" )
final class FooController{
@Autowired
StatefulKnowledgeSession ksession;
@RequestMapping( method = RequestMethod.GET )
@ResponseBody
public String evaluateUnit() {
Unit unit = new Unit("030", "502", "C", "9484", "45", new String[] {},
null);
if (ksession != null) {
ksession.fireAllRules();
ksession.insert(unit);
ksession.fireAllRules();
return "<UnitCategory>" + unit.getUnitCategory() + "</UnitCategory>";
}
else
return "<message> stateful session is null</message>";
}
The main question that I have is that – is this solution thread-safe ? From what I understand of spring is that beans configured without any additional qualifiers are inherently singletons. And when deployed in a multi-theaded container like tomcat, Spring assumes that the beans being severed up a thread-safe. So from I have read is that KnowledeSessions are inherently not thread safe. So putting the 2 together, I leaning towards the assessment that this above solution is NOT thread safe and that if I do want it to be thread safe I should set the StatefulKnowledgeSession to 'prototype' and not leave it as a singleton.
Please let me know if I'm missing anything in my assessment here !
Thanks in advance,
Gurvinder
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13 years, 3 months
constraints lacking and in excess
by Michiel Vermandel
Hi,
I have written a custom move implementation.
At first I got the exception:
java.lang.IllegalStateException: The moveClass (class my.planner.solver.MoveGroupToPeriod)'s move (PROJECT Period GroupChange:{T= Inspect 55871.I#0 [4->4] Bart DE BIE IV XI} => (P5) [i1]) probably has a corrupted undoMove (my.planner.solver.util.TaskChangeListMove@35e8df37). Or maybe there are corrupted score rules.
...
I found out that I did not undo all changes that I made in the move.
After fixing this, I now often get Score corruption as below.
I checked and all changes are preceded with director.beforeVariableChanged(...) and followed by director.afterVariableChanged(...);
What could cause this corruption?
java.lang.IllegalStateException: Score corruption: the workingScore (-286hard/-30601soft) is not the uncorruptedScore (-286hard/-30401soft):
The workingMemory has 3 ConstraintOccurrence(s) in excess:
preferedRegion/NEGATIVE_SOFT:[{T= Inspect 115519.I#0 [8->8] Dirk JANSSENS IV V}, Johan LAMOTE, 99, V]=99
taskSpreading/NEGATIVE_HARD:[(P7) , 77]=100
preferedRegion/NEGATIVE_SOFT:[{T= Inspect 115519.I#1 [8->8] Erik VERHOEVEN TL V}, Dirk JANSSENS, 99, V]=99
The workingMemory has 6 ConstraintOccurrence(s) lacking:
preferedRegion/NEGATIVE_SOFT:[{T= Inspect 115519.I#0 [8->8] Dirk JANSSENS IV V}, Dirk JANSSENS, 99, V]=99
taskSpreading/NEGATIVE_HARD:[(P7) , 75]=36
preferedRegion/NEGATIVE_SOFT:[{T= Inspect 115519.I#1 [8->8] Erik VERHOEVEN TL V}, Erik VERHOEVEN, 99, V]=99
preferedRegion/NEGATIVE_SOFT:[{T= Inspect 4747.I#0 [10->10] Johan LAMOTE IV V}, Johan LAMOTE, 99, V]=99
taskSpreading/NEGATIVE_HARD:[(P8) , 74]=16
preferedRegion/NEGATIVE_SOFT:[{T= Inspect 4747.I#1 [10->10] Dirk JANSSENS TL V}, Dirk JANSSENS, 99, V]=99
Check the score rules who created those ConstraintOccurrences. Verify that each ConstraintOccurrence's causes and weight is correct.
at org.drools.planner.core.score.director.AbstractScoreDirector.assertWorkingScore(AbstractScoreDirector.java:249)
at org.drools.planner.core.solver.scope.DefaultSolverScope.assertWorkingScore(DefaultSolverScope.java:96)
at org.drools.planner.core.phase.AbstractSolverPhaseScope.assertWorkingScore(AbstractSolverPhaseScope.java:124)
at org.drools.planner.core.localsearch.DefaultLocalSearchSolverPhase.solve(DefaultLocalSearchSolverPhase.java:86)
at org.drools.planner.core.solver.DefaultSolver.runSolverPhases(DefaultSolver.java:190)
at org.drools.planner.core.solver.DefaultSolver.solve(DefaultSolver.java:155)
at my.planner.app.InspectionSchedule.solve(InspectionSchedule.java:275)
at my.planner.testcore.AbstractPlanningTestClass.solve(AbstractPlanningTestClass.java:444)
at my.planner.testcore.AbstractPlanningTestClass.solve(AbstractPlanningTestClass.java:469)
at my.planner.RealBaoTest.datasetBAO20122013(RealBaoTest.java:226)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.runners.BlockJUnit4ClassRunner.runNotIgnored(BlockJUnit4ClassRunner.java:79)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:71)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:49)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Thanks,
Michiel
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13 years, 3 months
add guvnor-webapp-core as a dependency to project
by kooper
Hi,I'm trying to add guvnor-webapp-core as a dependency to my project, but
after when deploying app to JBOSS 7(tried 7.1.1 and 7.0.2), I have following
exception:
11:19:50,138 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-8)
MSC00001: Failed to start service
jboss.deployment.unit."my_app-1.0-SNAPSHOT.war".WeldService:
org.jboss.msc.service.StartException in service
jboss.deployment.unit."my_app-1.0-SNAPSHOT.war".WeldService:
org.jboss.weld.exceptions.DeploymentException: Exception List with 3
exceptions:Exception 0 :org.jboss.weld.exceptions.DeploymentException:
WELD-001408 Unsatisfied dependencies for type [RepositoryStartupService]
with qualifiers [@Default] at injection point [[field] @Inject private
org.drools.guvnor.server.repository.RulesRepositoryManager.repositoryStartupService]
at
org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:275)
at
org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:244)
at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:107) at
org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:127) at
org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:346) at
org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:331) at
org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:366)
at org.jboss.as.weld.WeldContainer.start(WeldContainer.java:83) at
org.jboss.as.weld.services.WeldService.start(WeldService.java:76) at
org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
at
org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)Exception 0
:org.jboss.weld.exceptions.DeploymentException: WELD-001408 Unsatisfied
dependencies for type [RepositoryStartupService] with qualifiers [@Default]
at injection point [[field] @Inject private
org.drools.guvnor.server.repository.MailboxService.repositoryStartupService]
at
org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:275)
at
org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:244)
at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:107) at
org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:127) at
org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:346) at
org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:331) at
org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:366)
at org.jboss.as.weld.WeldContainer.start(WeldContainer.java:83) at
org.jboss.as.weld.services.WeldService.start(WeldService.java:76) at
org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
at
org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)Exception 0
:org.jboss.weld.exceptions.DeploymentException: WELD-001408 Unsatisfied
dependencies for type [ConversionService] with qualifiers [@Default] at
injection point [[field] @Inject private
org.drools.guvnor.server.RepositoryAssetService.conversionService] at
org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:275)
at
org.jboss.weld.bootstrap.Validator.validateInjectionPoint(Validator.java:244)
at org.jboss.weld.bootstrap.Validator.validateBean(Validator.java:107) at
org.jboss.weld.bootstrap.Validator.validateRIBean(Validator.java:127) at
org.jboss.weld.bootstrap.Validator.validateBeans(Validator.java:346) at
org.jboss.weld.bootstrap.Validator.validateDeployment(Validator.java:331) at
org.jboss.weld.bootstrap.WeldBootstrap.validateBeans(WeldBootstrap.java:366)
at org.jboss.as.weld.WeldContainer.start(WeldContainer.java:83) at
org.jboss.as.weld.services.WeldService.start(WeldService.java:76) at
org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
at
org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636) at
org.jboss.as.weld.services.WeldService.start(WeldService.java:83) at
org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811)
[jboss-msc-1.0.2.GA.jar:1.0.2.GA] at
org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746)
[jboss-msc-1.0.2.GA.jar:1.0.2.GA] at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
[rt.jar:1.6.0_18] at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
[rt.jar:1.6.0_18] at java.lang.Thread.run(Thread.java:636)
[rt.jar:1.6.0_18]Caused by: org.jboss.weld.exceptions.DeploymentException:
Exception List with 3 exceptions:....
Do I need to add anything to project configuration to be able to add guvnor
as dependency?Thanks.
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13 years, 3 months
Fill dependent dropdown lists based on a web decision table
by peach_wyss
Hi
I'm using Drools and Guvnor in our project. We have the following Data Model
(simplified):
- Object C
-> has a List
-> has a List
I need to build an easy to edit web decision table in guvnor. We need the
table to fill a dropdown list (Object B) in dependency of another dropdown
list (Object A), when for example creating a new Object C on a form. The
table should look something like this:
[Object A] [Object B]
Test A1 Test B1
Test B2
Test B3
Test A2 Test B4
Test A3 Test B5
Test B6
Test A4 Test B7
Test B8
Test B9
Test B10
...so when a User creates a new Object C (Create-Form) and select on for
example "Test A3" in a dropdown list (Object A), Drools should be firing and
result "Test B5" and "Test B6", which then can be filled in the second
dropdown list (Object B).
How can I achieve such a scenario? We have already Drools Guvnor in use and
the requirement is, to have such a table to easy edit the dependencies of
this two dropdown lists.
Some thoughts:
- Is there a way to fill Objects in a List as a Action-Column in a web
decision table?
- Is there a way to add Objects to a List (global variable) in a web
decision table?
- Is there a way to achieve this with rule templates?
- Are there other ways to achieve this?
Thanks for your help.
Kind regards,
Peter
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13 years, 3 months
