Facing Problem in BRL
by Sumeet Karawal
Hi,
I am using Drools-Expert. I am having a class "Person" with data members as
age and discount.
I am trying to create a .brl. I have these statements in drools.package
package com.rules;
import com.model.PersonDetails;
and in the example.brl I am providing the details of when and then
conditions
but on execution I am getting the following error :
java.lang.RuntimeException: [4] Unable to expand: PersonDetails( age <
"20" )[6] Unable to expand: PersonDetails fact0 = new PersonDetails
();[7] Unable to expand: fact0.setDiscount( 10 );[8] Unable to
expand: insert(fact0 );
It would be helpful is somebody guide me on how execute it.
Also, I am creating the knowledgebase as:
private static KnowledgeBase createKnowledgeBase() {
KnowledgeBuilder builder = KnowledgeBuilderFactory.newKnowledgeBuilder();
builder.add (ResourceFactory.newClassPathResource(
"com/rules/example.brl"),ResourceType.BRL);
if (builder.hasErrors()) {
throw new RuntimeException (builder.getErrors().toString ());
}
KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase();
knowledgeBase.addKnowledgePackages(builder.getKnowledgePackages ());
return knowledgeBase;}
Thanks & Regards,
Sumeet Karawal
CEG - Open Source Technology Group
Tata Consultancy Services
Ph:- +912267782556
Cell:- +919833236440
Mailto: sumeet.karawal(a)tcs.com
Website: http://www.tcs.com
____________________________________________
Experience certainty. IT Services
Business Solutions
Outsourcing
____________________________________________
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14 years, 11 months
How to run one example of drools in eclipse?
by clement.pernot
hi,
I have download: "Drools Examples" on http://www.jboss.org/drools/downloads
I use eclipse in order to build.
I have follow this:
https://github.com/droolsjbpm/droolsjbpm-build-bootstrap/blob/master/READ...
in order to configure eclipse.
I don't know what i must do.
After one build i got this:
Apache Maven 3.0.2 (r1056850; 2011-01-09 01:58:10+0100)
Java version: 1.6.0_24, vendor: Sun Microsystems Inc.
Java home: /home/newel/eclipse/jre
Default locale: fr_FR, platform encoding: UTF-8
OS name: "linux", version: "2.6.35-28-generic", arch: "i386", family: "unix"
[INFO] Error stacktraces are turned on.
[DEBUG] Reading global settings from EMBEDDED/conf/settings.xml
[DEBUG] Reading user settings from /home/newel/.m2/settings.xml
[DEBUG] Using local repository at /home/newel/.m2/repository
[DEBUG] Using manager EnhancedLocalRepositoryManager with priority 10 for
/home/newel/.m2/repository
[INFO] Scanning for projects...
[DEBUG] Verifying availability of
/home/newel/.m2/repository/org/drools/drools/5.1.1/drools-5.1.1.pom from
[central (http://repo1.maven.org/maven2, releases=true, snapshots=false,
managed=false)]
[DEBUG] Using connector AsyncRepositoryConnector with priority 100 for
http://repo1.maven.org/maven2
[DEBUG] Reading resolution tracking file
/home/newel/.m2/repository/org/drools/drools/5.1.1/drools-5.1.1.pom.lastUpdated
[DEBUG] Writing resolution tracking file
/home/newel/.m2/repository/org/drools/drools/5.1.1/drools-5.1.1.pom.lastUpdated
[ERROR] The build could not read 1 project -> [Help 1]
org.apache.maven.project.ProjectBuildingException: Some problems were
encountered while processing the POMs:
[FATAL] Non-resolvable parent POM: Could not find artifact
org.drools:drools:pom:5.1.1 in central (http://repo1.maven.org/maven2) and
'parent.relativePath' points at wrong local POM @ line 5, column 11
at
org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:325)
at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:632)
at
org.apache.maven.DefaultMaven.getProjectsForMavenReactor(DefaultMaven.java:581)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:233)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:534)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at
org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
[ERROR]
[ERROR] The project org.drools:drools-examples:5.1.1
(/home/newel/workspace/drools-5.1.1-examples/drools-examples/pom.xml) has 1
error
[ERROR] Non-resolvable parent POM: Could not find artifact
org.drools:drools:pom:5.1.1 in central (http://repo1.maven.org/maven2) and
'parent.relativePath' points at wrong local POM @ line 5, column 11 -> [Help
2]
org.apache.maven.model.resolution.UnresolvableModelException: Could not find
artifact org.drools:drools:pom:5.1.1 in central
(http://repo1.maven.org/maven2)
at
org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:183)
at
org.apache.maven.model.building.DefaultModelBuilder.readParentExternally(DefaultModelBuilder.java:819)
at
org.apache.maven.model.building.DefaultModelBuilder.readParent(DefaultModelBuilder.java:670)
at
org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:308)
at
org.apache.maven.model.building.DefaultModelBuilder.build(DefaultModelBuilder.java:232)
at
org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:354)
at
org.apache.maven.project.DefaultProjectBuilder.build(DefaultProjectBuilder.java:305)
at org.apache.maven.DefaultMaven.collectProjects(DefaultMaven.java:632)
at
org.apache.maven.DefaultMaven.getProjectsForMavenReactor(DefaultMaven.java:581)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:233)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:156)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:534)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:196)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:141)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:290)
at
org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:230)
at
org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:409)
at
org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:352)
Caused by: org.sonatype.aether.resolution.ArtifactResolutionException: Could
not find artifact org.drools:drools:pom:5.1.1 in central
(http://repo1.maven.org/maven2)
at
org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:526)
at
org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifact(DefaultArtifactResolver.java:214)
at
org.apache.maven.project.ProjectModelResolver.resolveModel(ProjectModelResolver.java:179)
... 21 more
Caused by: org.sonatype.aether.transfer.ArtifactNotFoundException: Could not
find artifact org.drools:drools:pom:5.1.1 in central
(http://repo1.maven.org/maven2)
at
org.sonatype.aether.connector.async.AsyncRepositoryConnector$3.wrap(AsyncRepositoryConnector.java:1409)
at
org.sonatype.aether.connector.async.AsyncRepositoryConnector$3.wrap(AsyncRepositoryConnector.java:1404)
at
org.sonatype.aether.connector.async.AsyncRepositoryConnector$GetTask.flush(AsyncRepositoryConnector.java:895)
at
org.sonatype.aether.connector.async.AsyncRepositoryConnector$GetTask.flush(AsyncRepositoryConnector.java:889)
at
org.sonatype.aether.connector.async.AsyncRepositoryConnector.get(AsyncRepositoryConnector.java:276)
at
org.sonatype.aether.impl.internal.DefaultArtifactResolver.resolveArtifacts(DefaultArtifactResolver.java:438)
... 23 more
[ERROR]
[ERROR]
[ERROR] For more information about the errors and possible solutions, please
read the following articles:
[ERROR] [Help 1]
http://cwiki.apache.org/confluence/display/MAVEN/ProjectBuildingException
[ERROR] [Help 2]
http://cwiki.apache.org/confluence/display/MAVEN/UnresolvableModelException
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14 years, 11 months
Drool 5 memberOf problem
by dxande6
I'm trying to validate that there is a Factor in a collection using the
global variable ownedProductFactorSet. I'm having trouble. I do not get an
error, it just doesn't resolve to true. I've validated the
ownedProductFactor set has the Factor
Java class that is contained withing the ownedProductFactorSet:
Factor
String key
String value
Here is the code in the drl:
global Set ownedProductFactorSet;
rule "Owned Products"
ruleflow-group "discount-pricing"
lock-on-active true
when
not Factor(key == FactorKeys.DISCOUNT)
String(FactorKeys.PHONE_PACKAGE memberOf ownedProductFactorSet)
Factor(key == RulesKeys.WIRELESS)
then
logger(kcontext).info("SUCCESS - *******************************");
insert(new Factor(FactorKeys.DISCOUNT)); end
It never gets to the consequence (RHS - "then" part) of this rule.
If I comment out the following line:
String(FactorKeys.PHONE_PACKAGE memberOf ownedProductFactorSet) It
will work.
Any help with the memberOf keyword is greatly appreciated.
Thanks,
-dxande6
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14 years, 11 months
Rete
by Abhay B. Chaware
Have been reading about how Rete operates and how Drools implements Rete and so on .. and that Rete builds a network of nodes and each node is a pattern and has memory of facts which satisfy the pattern .... just as a curiosity, how does this all work internally ? what does it mean when they say that it builds a network .. and nodes are shared and attached .. what does really happen internally ?
Thanks
14 years, 11 months
Architectural problems and web service call
by Yoann Charpiot
Hi,
I'm new on Drools and i try to understand the architecture of the suite and
the dependencies between Guvnor and Expert.
I want to know if there is a physical link between the repository of rules
managed by Guvnor and the rules engine Expert when playing a rule in
production.
if not, is it possible to modify a rule in production without an IT
redeployment?
More generally, how are persist rules in the repository? Is it possible to
save them in a database or is it only persist in cache? if you have any
documentation on that.
And last question, do you have any documentation on how to expose a service
rule as a web service and how to consume it with the API?
Thanks you for your feedback.
14 years, 11 months
Use of StatelessKnowledgeSession
by aminmc
Hi there
I was wondering if someone might be able to help with what I am trying to
do. I have the following rule definition:
rule "open work item"
when
Task ( status == "OPEN")
then
insert(new Action("Take","take_task"));
insert(new Action("Complete","complete_task"));
insert(new Action("Close","close_task"));
end
Basically I want to insert a Task and then get back a list of Actions that
are available for the Task (based on the status. I have this working with a
statefulknowledgesession with the code:
List<Command> commands = new ArrayList<Command>();
for (Task task : tasks) {
commands.add(CommandFactory.newInsert(task));
}
session.execute(CommandFactory.newBatchExecution(commands));
session.fireAllRules();
session.dispose();
//this returns the actions
Collection objects = session.getObjects(new
ClassObjectFilter(Action.class));
I was wondering whether it is possible to do this with a
statelessknowledgesession instead? I could'nt see how to achieve this
without updating the task to include the actions.
Any help would be appreciated.
Cheers
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14 years, 11 months
Cast error message and DSL
by Giorgio Spagnardi
Hi to all,
I used the business rule guided editor to write a new rule. I'm verifying
the wrtitten rule but Guvnor returns the error message:
[MyRule] Unable to build expression for 'consequence': [Error: unable to
cast type: int; to: class java.lang.Integer] [Near : {...
tValue()));drools.update($sa); ....}] ^
[Line: 1, Column: 67] ' $sa.setBonusEsclusivo(percentuale(25,
((Integer)$cm).intValue()));update($sa);'
In DSL there is: [consequence][] Assign customer bonus of {num} percent=
$sa.setBonusEsclusivo(percentuale({num},
((Integer)$cm).intValue()));update($sa);
I didn't find a similiar error message....
Thanks in advance,
G.
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14 years, 11 months
Drools with LDAP
by Sumeet Karawal
Hi,
Is it possible to integrate Drools - BRMS with LDAP. I want to use roles
defined in LDAP as roles for BRMS for role based access of rules. Also can
it be Integrated with any Reporting tool.
Thanks & Regards,
Sumeet Karawal
Mailto: sumeet.karawal(a)tcs.com
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Notice: The information contained in this e-mail
message and/or attachments to it may contain
confidential or privileged information. If you are
not the intended recipient, any dissemination, use,
review, distribution, printing or copying of the
information contained in this e-mail message
and/or attachments to it are strictly prohibited. If
you have received this communication in error,
please notify us by reply e-mail or telephone and
immediately and permanently delete the message
and any attachments. Thank you
14 years, 11 months
unable to determine operator for symbol [before]
by vladimiro
Hi all,
I'm building a KnowledgeBase with KnowledgeAgent and a precompiled
rule package. When the package contains a rule using temporal operators
such "after" or "before" I get the exception listed at the end of this
message.
I'm using the latest version of drools 5 and my runtime configuration
includes the following libraries:
* drools-core - the rule engine itself.
* drools-api
* mvel2-2.0.10
* joda-time-1.6
the rule causing such a behaviour is:
rule 'Test2'
dialect 'mvel'
when
u1:UserType( firstName=="UserA" )
lie:UserEventType( event=="Login", user.id==u1.id)
loe:UserEventType(event=="Logout", user.id==u1.id, this before lie)
then
Message msg = new Message();msg.setText("Test2
fired");driver.getMessages().add(msg);
end
java.lang.RuntimeException: KnowledgeAgent exception while trying to
deserialize KnowledgeDefinitionsPackage
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:418)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:120)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:109)
at
info.vladimiro.tesi.peservice.KnowledgeBaseService.<init>(KnowledgeBaseService.java:94)
at
info.vladimiro.tesi.peservice.KnowledgeBaseService.getInstance(KnowledgeBaseService.java:65)
at
info.vladimiro.tesi.peservice.PEListener$KBTask.run(PEListener.java:35)
at java.util.TimerThread.mainLoop(Timer.java:512)
at java.util.TimerThread.run(Timer.java:462)
Caused by: org.drools.RuntimeDroolsException: unable to determine
operator for symbol [before]
at
org.drools.base.evaluators.Operator.determineOperator(Operator.java:71)
at org.drools.base.evaluators.Operator.readResolve(Operator.java:106)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at
java.io.ObjectStreamClass.invokeReadResolve(ObjectStreamClass.java:1033)
at
java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1728)
at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1305)
at java.io.ObjectInputStream.readObject(ObjectInputStream.java:348)
at org.drools.base.BaseEvaluator.readExternal(BaseEvaluator.java:53)
at ...
Can someone help? Thanks in advance.
Vladimiro Corsi
14 years, 11 months
