Re: [rules-users] Getting hold of the Evaluator Registry
On Linux, when I created my own accumulate functions, I had to put this file in my home directory to have it picked up by Eclipse. Cheers, Jarek Edson Tirelli wrote: root of your project classpath, not root of your project. []s Edson 2009/7/15 Asif Iqbal asif.iq...@infor.com mailto:asif.iq...@infor.com Hi Edson, I have gone away and tried the properties method of adding the customEvaluator, which worked fine for the code. But my IDE still does not pick it up. Any ideas? Do I need to place it in a META-INF folder in the root of the project? I have the following in the drools.packagebuilder.conf file. drools.evaluator.custom=com.infor.audit.bpr.component.validation.impl.drools.CustomComparableEvaluatorsDefinition thanks.. *From:* rules-users-boun...@lists.jboss.org mailto:rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org mailto:rules-users-boun...@lists.jboss.org] *On Behalf Of *Edson Tirelli *Sent:* 15 July 2009 14:57 *To:* Rules Users List *Subject:* Re: [rules-users] Getting hold of the Evaluator Registry Yes, you are in the right track, and I understand this is a bit confusing at first. One more reason for people to go to the October Rules Fest 2009 where I will give a presentation on all the ways to extend the engine to solve specific problems. It will be interesting I hope (last year was awesome) and even Charles Forgy will be there doing a presentation on Parallel Rete. :) Meanwhile I will write a tutorial on this, but just to help you there, your approach is correct, except that you don't need to setup the option for each operator. It works like this: * One EvaluatorDefinition class implements support to one or more evaluators, defined by the method public String[] getEvaluatorIds(). * All you need to do, then, is wire you class once and the engine will pick-up all the IDs supported by that class. When you have your class wired, you give it a unique string identifier, so that if you ever need to replace it, or remove it, you will use that id. Sometimes we use the operator as the ID, but usually it is something that reminds you of the kind of evaluators that class define. For instance, drools registers the ComparableEvaluatorsDefinition in this way: drools.evaluator.comparable = org.drools.base.evaluators.ComparableEvaluatorsDefinition So in this case, comparable is the identifier. Finally, from my previous e-mail you will see that the reason that the eclipse IDE is still giving you errors is that you are using the API to configure the evaluators. Just move the configuration to the configuration file and the IDE will pick it up. []s Edson 2009/7/15 Asif Iqbal asif.iq...@infor.com mailto:asif.iq...@infor.com Edson, What I have done so far is created a CustomComparableEvaluatorsDefinition, which is exactly the same as the default ComparableEvaluatorsDefinition apart form having support for strings, which I have done by creating StringGreaterOrEqualEvaluators and added that in my custom class, using the addEvaluatorFunction :- addEvaluator( ValueType.SHORT_TYPE, Operator.GREATER, ShortGreaterEvaluator.INSTANCE ); addEvaluator( ValueType.SHORT_TYPE, Operator.GREATER_OR_EQUAL,ShortGreaterOrEqualEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.LESS,ShortLessEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.LESS_OR_EQUAL, ShortLessOrEqualEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.GREATER, ShortGreaterEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.GREATER_OR_EQUAL,ShortGreaterOrEqualEvaluator.INSTANCE ); //Custom additions addEvaluator( ValueType.STRING_TYPE, Operator.LESS,StringLessEvaluator.INSTANCE ); addEvaluator( ValueType.STRING_TYPE, Operator.LESS_OR_EQUAL, StringLessOrEqualEvaluator.INSTANCE ); addEvaluator( ValueType.STRING_TYPE, Operator.GREATER, StringGreaterEvaluator.INSTANCE ); addEvaluator( ValueType.STRING_TYPE, Operator.GREATER_OR_EQUAL,StringGreaterOrEqualEvaluator.INSTANCE ); Now Im am trying to wire it, with the following..
Re: [rules-users] looking for more information on drools expert
I finally suceeded to get what I wanted using the keyword accumulate which is really very poweful as said in the doc. Here is the rule: http://drools.pastebin.com/m4f938e40 It is a little bit complex, but it perfectly works. The only observation I have is that it seems drools compatible jdk is 1.5, since I tryed to declare my linkedlist this way: LinkedListAlarm(), but got warnings about the unexpected ''. One other thing, the implicit and does not work in the accumulate, you have to put it clearly. Now I have something giving me the list I need, all should be easy I think. Do you have any observation on the way I did it? Cheers Aldian ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] looking for more information on drools expert
accumulate is indeed complex; the simpler collect might be applicable
as well in this case.
rule all45_A
when
forall ( Equipment( parent == 0, $id : id )
Alarm( cause == 45, source == $id ) )
$alarms : ArrayList()
from collect( Alarm( cause == 45, $source : source ) )
then
for( Object o: $alarms ){
retract( o );// or anything else with (Alarm)o
}
insert( new SummaryAlarm( 45 ) );
end
Another solution would be by using 2 rules:
rule all45_B1
when
forall ( Equipment( parent == 0, $id : id )
Alarm( cause == 45, source == $id ) )
then
insert( new SummaryAlarm( 45 ) );
end
rule all45_B2
when
SummaryAlarm( $cause : cause )
$a : Alarm( cause == $cause, $source : source )
Equipment( parent == 0, id == $source)
then
retract( $a ); // or anything else with $a
end
-W
On Thu, Jul 16, 2009 at 10:55 AM, Gab Aldianaldian...@gmail.com wrote:
I finally suceeded to get what I wanted using the keyword accumulate
which is really very poweful as said in the doc. Here is the rule:
http://drools.pastebin.com/m4f938e40
It is a little bit complex, but it perfectly works. The only
observation I have is that it seems drools compatible jdk is 1.5,
since I tryed to declare my linkedlist this way: LinkedListAlarm(),
but got warnings about the unexpected ''. One other thing, the
implicit and does not work in the accumulate, you have to put it
clearly.
Now I have something giving me the list I need, all should be easy I
think. Do you have any observation on the way I did it?
Cheers
Aldian
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[rules-users] Updating a Boolean object in the WM
Hi guys, I've been desperately trying to update a Boolean object, which is in the working memory. I have an initial rule that first inserts it: rule Insert initial weanable value salience 100 when then Boolean $weanable = false; insert($weanable); end and then I try to update it: ... when $weanable: Boolean( ) ... then $weanable=true; update($weanable); end Which results to this exception : org.drools.FactException: Update error: handle not found for object: true. Is it in the working memory? I checked in the working memory and the Boolean-object was there! Is it possible to update a boolean that is in the working memory? If not, do you know some other Java class with setters and getters (behaving as a drools-fact) that I don't have to create myself and which I can use instead of Bboolean for this case ? Thanks in advance! Svetlomir -- View this message in context: http://www.nabble.com/Updating-a-Boolean-object-in-the-WM-tp24513225p24513225.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Problems with persistence of drools-flow
I have a simple flow with human task and I want to persist it into database.
I'm using MSSQL DB.
My code is like this:
KnowledgeBase kbase = readKnowledgeBase();
// create the entity manager factory and register it in
the environment
EntityManagerFactory emf =
Persistence.createEntityManagerFactory(
org.drools.persistence.jpa );
Environment env = KnowledgeBaseFactory.newEnvironment();
env.set( EnvironmentName.ENTITY_MANAGER_FACTORY, emf );
BitronixTransactionManager btm =
TransactionManagerServices.getTransactionManager();
env.set( EnvironmentName.TRANSACTION_MANAGER, btm);
StatefulKnowledgeSession ksession =
JPAKnowledgeService.newStatefulKnowledgeSession(
kbase, null, env );
KnowledgeRuntimeLogger logger =
KnowledgeRuntimeLoggerFactory.newFileLogger(ksession, test);
ksession.getWorkItemManager().registerWorkItemHandler(Human Task, new
WSHumanTaskHandler());
// start a new process instance
MapString,Object data = new HashMapString,Object();
data.put(data3, new MyTask(1,This is taks 1));
ProcessInstance pi =
ksession.startProcess(com.sample.ruleflow,data);
logger.close();
But when i run it, it end up with this error and there is nothing in the
database (the tables were created, but there are all empty):
java.lang.NullPointerException
at
org.drools.persistence.processinstance.ProcessInstanceInfo.getId(ProcessInstanceInfo.java:70)
at
org.drools.persistence.processinstance.JPAProcessInstanceManager.addProcessInstance(JPAProcessInstanceManager.java:34)
at
org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1620)
at
org.drools.process.command.StartProcessCommand.execute(StartProcessCommand.java:46)
at
org.drools.process.command.StartProcessCommand.execute(StartProcessCommand.java:10)
at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:229)
at
org.drools.process.command.impl.CommandBasedStatefulKnowledgeSession.startProcess(CommandBasedStatefulKnowledgeSession.java:163)
at
com.sample.RuleFlowPersistenceTest.main(RuleFlowPersistenceTest.java:74)
java.lang.RuntimeException: Could not rollback transaction
at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:258)
at
org.drools.process.command.impl.CommandBasedStatefulKnowledgeSession.startProcess(CommandBasedStatefulKnowledgeSession.java:163)
at
com.sample.RuleFlowPersistenceTest.main(RuleFlowPersistenceTest.java:74)
Caused by: java.lang.RuntimeException: Could not execute command
at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:255)
... 2 more
Caused by: java.lang.NullPointerException
at
org.drools.persistence.processinstance.ProcessInstanceInfo.getId(ProcessInstanceInfo.java:70)
at
org.drools.persistence.processinstance.JPAProcessInstanceManager.addProcessInstance(JPAProcessInstanceManager.java:34)
at
org.drools.common.AbstractWorkingMemory.startProcess(AbstractWorkingMemory.java:1620)
at
org.drools.process.command.StartProcessCommand.execute(StartProcessCommand.java:46)
at
org.drools.process.command.StartProcessCommand.execute(StartProcessCommand.java:10)
at
org.drools.persistence.session.SingleSessionCommandService.execute(SingleSessionCommandService.java:229)
... 2 more
In JPAProcessInstanceManager.java there this method is called:
public void addProcessInstance(ProcessInstance processInstance) {
ProcessInstanceInfo processInstanceInfo = new ProcessInstanceInfo(
processInstance );
EntityManager em = (EntityManager)
this.workingMemory.getEnvironment().get( EnvironmentName.ENTITY_MANAGER );
em.persist( processInstanceInfo );
((ProcessInstance) processInstance).setId( processInstanceInfo.getId()
);
processInstanceInfo.updateLastReadDate();
internalAddProcessInstance(processInstance);
}
But em.persist does nothing, no connection do DB is called. And then the next
line will fail.
Can anybody help me.
Thanks
Martin Sevcik
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Re: [rules-users] OFBiz entity engine compatibility with Jackrabbit
Hi pardeep.ru...@lntinfotech.com wrote: Hi, I am using apache OFBiz which uses Entity engine as a persistence layer. To know more about Entity engine refer this link http://ofbiz.apache.org/docs/entity.html Drools Guvnor uses Jackrabbit as a persistence layaer. So my question is there a way i can use OFbiz entity engine persistence layer in Drools guvnor in place of Jackrabbit. Jackrabbit is a JCR, OFBiz isn't, right? You should be able to replace Jackrabbit with any JCR implementation. IMO OFBiz is not an option. Is it feasible to do this and if possible how much effort is needed? Haven't heard of anybody replacing Jackrabbit with another JCR implementation before - share your experience when you try :) Cheers, Jarek Thanks Regards Pardeep Ruhil LT Infotech Ltd Mumbai Ph: +919820283884 * Larsen Toubro Infotech Ltd.*_ __www.Lntinfotech.com_ http://www.lntinfotech.com/ This Document is classified as: LT Infotech Proprietary LT Infotech Confidential LT Infotech Internal Use Only LT Infotech General Business This Email may contain confidential or privileged information for the intended recipient (s) If you are not the intended recipient, please do not use or disseminate the information, notify the sender and delete it from your system. __ ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Updating a Boolean object in the WM
Well, you can't change a Java object Boolean b; assigning another Boolean to b changes the object reference stored in b. Boolean has no setters. Notice that the CE when Boolean() always is true irrespective of the Boolean object that's in the WM. If writing a Java fact class strains you too much, check the Expert documentation for declare, to define a suitable fact type in your drl file. For good obfuscation, you might try java.util.BitSet, (ab)using isEmpty(). BitSet( empty == true ) -W On Thu, Jul 16, 2009 at 11:31 AM, skasab2sskasa...@smail.inf.fh-brs.de wrote: Hi guys, I've been desperately trying to update a Boolean object, which is in the working memory. I have an initial rule that first inserts it: rule Insert initial weanable value salience 100 when then Boolean $weanable = false; insert($weanable); end and then I try to update it: ... when $weanable: Boolean( ) ... then $weanable=true; update($weanable); end Which results to this exception : org.drools.FactException: Update error: handle not found for object: true. Is it in the working memory? I checked in the working memory and the Boolean-object was there! Is it possible to update a boolean that is in the working memory? If not, do you know some other Java class with setters and getters (behaving as a drools-fact) that I don't have to create myself and which I can use instead of Bboolean for this case ? Thanks in advance! Svetlomir -- View this message in context: http://www.nabble.com/Updating-a-Boolean-object-in-the-WM-tp24513225p24513225.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools Govnor DB configuration
Hi,
pardeep.ru...@lntinfotech.com wrote:
Hi,
I am using Apache OFBiz and had successfully integrated Drools Guvnor
war file with OFBiz.
By default Drools Guvnor supports Embedded derby, but in OFBiz i am
using MYSql , so i changed
the default embedded derby to MySql using repository.xml file by the
following code.
PersistenceManager
class=org.apache.jackrabbit.core.persistence.bundle.MySqlPersistenceManager
param name=url
value=jdbc:mysql://localhost:3306/drools/
param name=user value=root /
param name=password value=Newuser123 /
param name=schema value=mysql/
param name=schemaObjectPrefix value=${wsp.name}_/
/PersistenceManager
Using this I successfully integrated Drools guvnor with same database as
I am using for OFBiz(MySql).
Now I have created a new user in Drools guvnor to create permission for
that user, but I am not able to see
where that username is stored in the database and in which entity or
table of MySql.
Also if i want to use the users available in OFBiz MySql database
entity say 'Userlogin' where i am storing all the list of userlogins,
how can
I retrieve the same and use this table data in drools Guvnor.
This can be done via JAAS - you just need to configure it to use a
particular table in mysql for retrieving user logins/passwords.
Keep in mind that this is just for authentication (to login).
Here's a list of all available login modules:
http://www.jboss.org/community/wiki/LoginModule
http://www.jboss.org/community/wiki/DatabaseServerLoginModule
Also when
I make a new user in Drools Govnor through
administrator, my data of new user should go to table 'UserLogin'.
AFAICT that's not possible and you need to synch your Guvnor user list
with the OFBiz user list by yourself.
Cheers,
Jarek
Please help me how this can be achieved in Drools Guvnor.
Thanks Regards
Pardeep Ruhil
LT Infotech Ltd
Mumbai
Ph: +919820283884
*
Larsen Toubro Infotech Ltd.*_
__www.Lntinfotech.com_ http://www.lntinfotech.com/
This Document is classified as:
LT Infotech Proprietary LT Infotech Confidential LT Infotech
Internal Use Only LT Infotech General Business
This Email may contain confidential or privileged information for the
intended recipient (s) If you are not the intended recipient, please do
not use or disseminate the information, notify the sender and delete it
from your system.
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Re: [rules-users] Updating a Boolean object in the WM
Thanks Wolfgang! It worked great! The Declare-Command did it perfectly! Nice job! :) Svetlomir. -- View this message in context: http://www.nabble.com/Updating-a-Boolean-object-in-the-WM-tp24513225p24515020.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] looking for more information on drools expert
After some more investigation, I managed also to make it work with collect: http://drools.pastebin.com/m14f0e329 I would rather not multiplicate rules, because we probably will have dozens for our system which is very big and can supervise around a thousand equipements in some cases Thank you very much for the advices Aldian ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] StatefulKnowledgeSession leaves threads running
Hi all, I've downloaded Drools fusion sample and started to make some changes to the code (first of all wipe out the UI so I can test it easier). I tried to get to a minimal set so I can run a console main class and see what happens but I am facing a strange behaviour. As soon as I start pushing events into the WorkingMemoryEntryPoint (StockTick stream) a Thread - not daemonized since it blocks shutdown from ending - is spawned and this prevents my JVM from shutting down (obviously if I call System.exit(0) it will but I am avoiding this). I've tried both to halt and dispose the session that this entry point belongs but with no success. Does anyone know how could I get rid of this thread? best regards, -- View this message in context: http://www.nabble.com/StatefulKnowledgeSession-leaves-threads-running-tp24503855p24503855.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Using variables as map keys in MVEL in LHS
Hello,
Again, I'm working on converting my project that used Drools 4.0.7 to
5.0.1.
I've run across a problem with a rule that accesses a map in the LHS using
a variable as the key. When MVEL tries to resolve this, it appears that
it is not evaluating the variable before accessing the map. I've modified
the Shopping example from the Drools 5.0.1 Examples to recreate the issue
in a simpler setting.
This is the rule (I removed all the other rules for this example)
rule Cart notification
salience 10
when
$p : Product( $productName : name)
$c : Customer( cart[$productName] == $p)
then
System.out.println( Customer + $c.name + has + $p.name +
in cart);
end
I added the following to the Customer class:
private MapString,Product cart = new HashMapString, Product();
public MapString, Product getCart() {
return cart;
}
and I modified the main method to be:
public static final void main(String[] args) throws Exception {
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.
newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource( Shopping.drl,
ShoppingExample.class ),
ResourceType.DRL );
final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
final StatefulKnowledgeSession ksession =
kbase.newStatefulKnowledgeSession();
Customer mark = new Customer( mark,
0 );
ksession.insert( mark );
Product shoes = new Product( shoes,
60 );
ksession.insert( shoes );
mark.getCart().put(shoes, shoes);
ksession.fireAllRules();
}
So basically, I added a map to Customer, inserted one item and made a rule
that will use a variable as a key for that map.
What I would expect to happen is:
the Product pattern would match the shoes Product that is inserted into
the ksession, the $productName variable would contain the value shoes
the Customer fact, mark, would be matched with the second pattern in the
rule because cart[shoes] should resolve to the shoes fact which is $p in
the rule
The message should print
What actually happens is an error message:
Exception in thread main org.drools.RuntimeDroolsException: Exception
executing predicate cart[$productName] == $p
at org.drools.rule.PredicateConstraint.isAllowedCachedLeft(
PredicateConstraint.java:302)
at org.drools.common.SingleBetaConstraints.isAllowedCachedLeft(
SingleBetaConstraints.java:138)
at org.drools.reteoo.JoinNode.assertLeftTuple(JoinNode.java:114)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(
SingleLeftTupleSinkAdapter.java:117)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(
SingleLeftTupleSinkAdapter.java:78)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(
LeftInputAdapterNode.java:142)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(
SingleObjectSinkAdapter.java:42)
at org.drools.reteoo.ObjectTypeNode.assertObject(
ObjectTypeNode.java:185)
at org.drools.reteoo.EntryPointNode.assertObject(
EntryPointNode.java:146)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:1046)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:1001)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:788)
at org.drools.impl.StatefulKnowledgeSessionImpl.insert(
StatefulKnowledgeSessionImpl.java:216)
at org.drools.examples.ShoppingExample.main(
ShoppingExample.java:32)
Caused by: [Error: unable to resolve method:
java.util.HashMap.$productName() [arglength=0]]
[Near : {... Unknown }]
^
[Line: 1, Column: 0]
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(
ReflectiveAccessorOptimizer.java:906)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(
ReflectiveAccessorOptimizer.java:585)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(
ReflectiveAccessorOptimizer.java:313)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(
ReflectiveAccessorOptimizer.java:138)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(
ASTNode.java:133)
at org.mvel2.compiler.ExecutableAccessor.getValue(
ExecutableAccessor.java:37)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getCollectionProperty(
ReflectiveAccessorOptimizer.java:633)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(
ReflectiveAccessorOptimizer.java:319)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(
ReflectiveAccessorOptimizer.java:138)
at
Re: [rules-users] Getting hold of the Evaluator Registry
There are several places that drools looks for configuration files, including your home directory. Although, IMO it makes more sense to keep it confined to the project itself. If you create a dir in your project, like: src/resources/META-INF And then configure the eclipse project to use the folde src/resources as a source folder, it will pick it up. []s Edson 2009/7/16 Jaroslaw Kijanowski kijanow...@gmail.com On Linux, when I created my own accumulate functions, I had to put this file in my home directory to have it picked up by Eclipse. Cheers, Jarek Edson Tirelli wrote: root of your project classpath, not root of your project. []s Edson 2009/7/15 Asif Iqbal asif.iq...@infor.com mailto:asif.iq...@infor.com Hi Edson, I have gone away and tried the properties method of adding the customEvaluator, which worked fine for the code. But my IDE still does not pick it up. Any ideas? Do I need to place it in a META-INF folder in the root of the project? I have the following in the drools.packagebuilder.conf file. drools.evaluator.custom=com.infor.audit.bpr.component.validation.impl.drools.CustomComparableEvaluatorsDefinition thanks.. *From:* rules-users-boun...@lists.jboss.org mailto:rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org mailto:rules-users-boun...@lists.jboss.org] *On Behalf Of *Edson Tirelli *Sent:* 15 July 2009 14:57 *To:* Rules Users List *Subject:* Re: [rules-users] Getting hold of the Evaluator Registry Yes, you are in the right track, and I understand this is a bit confusing at first. One more reason for people to go to the October Rules Fest 2009 where I will give a presentation on all the ways to extend the engine to solve specific problems. It will be interesting I hope (last year was awesome) and even Charles Forgy will be there doing a presentation on Parallel Rete. :) Meanwhile I will write a tutorial on this, but just to help you there, your approach is correct, except that you don't need to setup the option for each operator. It works like this: * One EvaluatorDefinition class implements support to one or more evaluators, defined by the method public String[] getEvaluatorIds(). * All you need to do, then, is wire you class once and the engine will pick-up all the IDs supported by that class. When you have your class wired, you give it a unique string identifier, so that if you ever need to replace it, or remove it, you will use that id. Sometimes we use the operator as the ID, but usually it is something that reminds you of the kind of evaluators that class define. For instance, drools registers the ComparableEvaluatorsDefinition in this way: drools.evaluator.comparable = org.drools.base.evaluators.ComparableEvaluatorsDefinition So in this case, comparable is the identifier. Finally, from my previous e-mail you will see that the reason that the eclipse IDE is still giving you errors is that you are using the API to configure the evaluators. Just move the configuration to the configuration file and the IDE will pick it up. []s Edson 2009/7/15 Asif Iqbal asif.iq...@infor.com mailto:asif.iq...@infor.com Edson, What I have done so far is created a CustomComparableEvaluatorsDefinition, which is exactly the same as the default ComparableEvaluatorsDefinition apart form having support for strings, which I have done by creating StringGreaterOrEqualEvaluators and added that in my custom class, using the addEvaluatorFunction :- addEvaluator( ValueType.SHORT_TYPE, Operator.GREATER, ShortGreaterEvaluator.INSTANCE ); addEvaluator( ValueType.SHORT_TYPE, Operator.GREATER_OR_EQUAL,ShortGreaterOrEqualEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.LESS,ShortLessEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.LESS_OR_EQUAL, ShortLessOrEqualEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.GREATER, ShortGreaterEvaluator.INSTANCE ); addEvaluator( ValueType.PSHORT_TYPE, Operator.GREATER_OR_EQUAL,ShortGreaterOrEqualEvaluator.INSTANCE ); //Custom additions addEvaluator( ValueType.STRING_TYPE, Operator.LESS,StringLessEvaluator.INSTANCE ); addEvaluator( ValueType.STRING_TYPE,
Re: [rules-users] looking for more information on drools expert
Very good! :) Just FYI, in the case of accumulate, you could also use the collectList() function to simplify your rule. This: $alarmList : LinkedList() from accumulate ( ($e : Element(parentindex!=0) and $a : Alarm( origin matches $e.name probablecause==45)), init( LinkedList alarmList = new LinkedList();), action( alarmList.add($a);), reverse( alarmList.remove($a);), result( alarmList ) ); Is the same as: $alarmList : List() from accumulate ( ($e : Element(parentindex!=0) and $a : Alarm( origin matches $e.name probablecause==45)), collectList( $a ) ); Also, you can always implement your own functions for accumulate: http://blog.athico.com/2009/06/how-to-implement-accumulate-functions.html Finally, I see you are using matches operator to compare equal strings. Not sure if that is what you want, because == has different semantics and better performance than matches if what you really want is compare equality. Remember that in regexps, some characters have special meaning, for instance, . is a wildcard for any character. Meaning: abc matches a.c - true abc == a.c - false Cheers, Edson 2009/7/16 Gab Aldian aldian...@gmail.com After some more investigation, I managed also to make it work with collect: http://drools.pastebin.com/m14f0e329 I would rather not multiplicate rules, because we probably will have dozens for our system which is very big and can supervise around a thousand equipements in some cases Thank you very much for the advices Aldian ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Using variables as map keys in MVEL in LHS
This was a bug in one of the MVEL versions that is fixed. Can you update
your MVEL jar to one of the latest releases? I think it is 2.0.12.
[]s
Edson
2009/7/16 Steve Ronderos steve.ronde...@ni.com
Hello,
Again, I'm working on converting my project that used Drools 4.0.7 to
5.0.1.
I've run across a problem with a rule that accesses a map in the LHS using
a variable as the key. When MVEL tries to resolve this, it appears that it
is not evaluating the variable before accessing the map. I've modified the
Shopping example from the Drools 5.0.1 Examples to recreate the issue in a
simpler setting.
This is the rule (I removed all the other rules for this example)
*rule* Cart notification
*salience* 10
*when*
$p : Product( $productName : name)
$c : Customer( cart[$productName] == $p)
*then*
System.out.println( Customer + $c.name + has + $p.name +
in cart);
*end*
I added the following to the Customer class:
*private* MapString,Product cart = *new* HashMapString, Product();
*public* MapString, Product getCart() {
*return* cart;
}
and I modified the main method to be:
*public* *static* *final* *void* main(String[] args) *throws* Exception {
*final* KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.*
newKnowledgeBuilder*();
kbuilder.add( ResourceFactory.*newClassPathResource*( Shopping.drl,
ShoppingExample.*class* ),
ResourceType.*DRL* );
*final* KnowledgeBase kbase = KnowledgeBaseFactory.*newKnowledgeBase*
();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
*final* StatefulKnowledgeSession ksession =
kbase.newStatefulKnowledgeSession();
Customer mark = *new* Customer( mark,
0 );
ksession.insert( mark );
Product shoes = *new* Product( shoes,
60 );
ksession.insert( shoes );
mark.getCart().put(shoes, shoes);
*ksession*.fireAllRules();
}
So basically, I added a map to Customer, inserted one item and made a rule
that will use a variable as a key for that map.
What I would expect to happen is:
the Product pattern would match the shoes Product that is inserted into
the ksession, the $productName variable would contain the value shoes
the Customer fact, mark, would be matched with the second pattern in the
rule because cart[shoes] should resolve to the shoes fact which is $p in
the rule
The message should print
What actually happens is an error message:
Exception in thread main *org.drools.RuntimeDroolsException*: Exception
executing predicate cart[$productName] == $p
at org.drools.rule.PredicateConstraint.isAllowedCachedLeft(*
PredicateConstraint.java:302*)
at org.drools.common.SingleBetaConstraints.isAllowedCachedLeft(*
SingleBetaConstraints.java:138*)
at org.drools.reteoo.JoinNode.assertLeftTuple(*JoinNode.java:114*)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(*
SingleLeftTupleSinkAdapter.java:117*)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple(
*SingleLeftTupleSinkAdapter.java:78*)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(*
LeftInputAdapterNode.java:142*)
at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(
*SingleObjectSinkAdapter.java:42*)
at org.drools.reteoo.ObjectTypeNode.assertObject(*
ObjectTypeNode.java:185*)
at org.drools.reteoo.EntryPointNode.assertObject(*
EntryPointNode.java:146*)
at org.drools.common.AbstractWorkingMemory.insert(*
AbstractWorkingMemory.java:1046*)
at org.drools.common.AbstractWorkingMemory.insert(*
AbstractWorkingMemory.java:1001*)
at org.drools.common.AbstractWorkingMemory.insert(*
AbstractWorkingMemory.java:788*)
at org.drools.impl.StatefulKnowledgeSessionImpl.insert(*
StatefulKnowledgeSessionImpl.java:216*)
at org.drools.examples.ShoppingExample.main(*
ShoppingExample.java:32*)
Caused by: [Error: unable to resolve method:
java.util.HashMap.$productName() [arglength=0]]
[Near : {... Unknown }]
^
[Line: 1, Column: 0]
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(*
ReflectiveAccessorOptimizer.java:906*)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(
*ReflectiveAccessorOptimizer.java:585*)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(
*ReflectiveAccessorOptimizer.java:313*)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.optimizeAccessor(
*ReflectiveAccessorOptimizer.java:138*)
at org.mvel2.ast.ASTNode.getReducedValueAccelerated(*
ASTNode.java:133*)
at org.mvel2.compiler.ExecutableAccessor.getValue(*
ExecutableAccessor.java:37*)
at
[rules-users] Question regarding Release 5.1
Hi, Does anyone know if there is a roadmap for the next Drools release, an anticipated, forecast, or suspected date, for Release 5.1? Thank you, Dan Office phone: (972) 691-6593 Mobile phone (214) 697-8163 _ The information contained in this message is proprietary and/or confidential. If you are not the intended recipient, please: (i) delete the message and all copies; (ii) do not disclose, distribute or use the message in any manner; and (iii) notify the sender immediately. In addition, please be aware that any message addressed to our domain is subject to archiving and review by persons other than the intended recipient. Thank you. _ ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] StatefulKnowledgeSession leaves threads running
Hi Rafael, Are you setting the MultithreadEvaluation option or is this using default options? Do you have an example code that shows this behavior? Thanks, Edson 2009/7/16 Rafael Ribeiro rafae...@gmail.com Hi all, I've downloaded Drools fusion sample and started to make some changes to the code (first of all wipe out the UI so I can test it easier). I tried to get to a minimal set so I can run a console main class and see what happens but I am facing a strange behaviour. As soon as I start pushing events into the WorkingMemoryEntryPoint (StockTick stream) a Thread - not daemonized since it blocks shutdown from ending - is spawned and this prevents my JVM from shutting down (obviously if I call System.exit(0) it will but I am avoiding this). I've tried both to halt and dispose the session that this entry point belongs but with no success. Does anyone know how could I get rid of this thread? best regards, -- ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] StatefulKnowledgeSession leaves threads running
Hi Edson!
as I've already mentioned I've modified the sample so, if you get the
StockTick sample and replace the Main class this will run fine.
The sample shuts down fine but as I saw it sets the JFrame uses
frame.setDefaultCloseOperation( WindowConstants.EXIT_ON_CLOSE ); which in
turn makes the trick.
Below the code of my modified main class:
package org.drools.examples.broker;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.conf.EventProcessingOption;
import org.drools.examples.broker.model.Company;
import org.drools.examples.broker.model.CompanyRegistry;
import org.drools.examples.broker.model.StockTick;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.rule.WorkingMemoryEntryPoint;
public class Main {
private static final String RULES_FILE = /broker.drl;
static StatefulKnowledgeSession session;
static WorkingMemoryEntryPoint tickStream;
/**
* @param args
*/
public static void main(String[] args) throws Exception {
// set up and show main window
CompanyRegistry companies = new CompanyRegistry();
KnowledgeBuilder builder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
try {
builder.add( ResourceFactory.newInputStreamResource(
Main.class.getResourceAsStream( RULES_FILE ) ),
ResourceType.DRL);
} catch ( Exception e ) {
e.printStackTrace();
}
if( builder.hasErrors() ) {
System.err.println(builder.getErrors());
System.exit( 0 );
}
KnowledgeBaseConfiguration conf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
conf.setOption( EventProcessingOption.STREAM );
KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase( conf );
kbase.addKnowledgePackages( builder.getKnowledgePackages() );
session = kbase.newStatefulKnowledgeSession();
session.setGlobal( services, new BrokerServices() {
public void log(String message) {
System.out.println(message);
}
});
for( Company company : companies.getCompanies() ) {
session.insert( company );
}
session.fireAllRules();
tickStream = session.getWorkingMemoryEntryPoint( StockTick stream
);
for (int i=10;i0;i--) {
tickStream.insert(new StockTick(RHT, i*10,
System.currentTimeMillis()));
session.getAgenda().getAgendaGroup( evaluation ).setFocus();
session.fireAllRules();
}
session.dispose();
session.halt();
System.out.println(Still running...);
}
}
regards,
Rafael Ribeiro
2009/7/16 Edson Tirelli tire...@post.com
Hi Rafael,
Are you setting the MultithreadEvaluation option or is this using
default options? Do you have an example code that shows this behavior?
Thanks,
Edson
2009/7/16 Rafael Ribeiro rafae...@gmail.com
Hi all,
I've downloaded Drools fusion sample and started to make some changes to
the code (first of all wipe out the UI so I can test it easier).
I tried to get to a minimal set so I can run a console main class and see
what happens but I am facing a strange behaviour.
As soon as I start pushing events into the WorkingMemoryEntryPoint
(StockTick stream) a Thread - not daemonized since it blocks shutdown
from
ending - is spawned and this prevents my JVM from shutting down (obviously
if I call System.exit(0) it will but I am avoiding this).
I've tried both to halt and dispose the session that this entry point
belongs but with no success. Does anyone know how could I get rid of this
thread?
best regards,
--
___
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rules-users@lists.jboss.org
http://lists.jboss.org/mailman/listinfo/rules-users
___
rules-users mailing list
rules-users@lists.jboss.org
http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools Govnor DB configuration
Note: I did ask permission before sending this notice to the Drools Developers and Drools Users Groups. Greetings:As both Edson Tirelli and Mark Proctor are presenting two great talks at October Rules Fest (http://www.OctoberRulesFest.org) this year, I thought it might be appropriate to let everyone know about the details. We will have no less than three presentations on CEP (Edson Tirelli, Paul Vincent of Tibco and Luke Voss ) so it should be a really great time for techies of this unique little world of rulebased programmers. Two of the talks have to do with complex implementations of a rulebased system. Dr. Forgy has promised to discuss (in addition to his parallel rulebase presentation) his new Tech algorithm that is 10 times faster than Rete 2 or Rete III. In addition we will haveDr. Forgy (Rete, Rete 2, Rete III, Tech)Gary Riley (CLIPS inventor)John Zachman (Enterprise Architecture guru)Dr. Hafedh Mili (wrote all of the early JRules tutorial manuals)Mark Proctor (Drools Inventor)Dr. Richard Hicks (Validation and Verification guru)Dr. Daniel Levine (One of the Neural Net Godfathers)Daniel Brookshier (UML - Rules inventor)Carole Ann Berlioz-Matignon Carlos Serrano-Morales (Advisor inventors)Dr. Jacob Feldman (Open Rules inventor)Jason Morris (Jess Answer Man)Luke Voss (former JPL guru)Remember three things: (1) The Early Bird Discount for the October Rules Fest expires at the end of July. (2) There are a limited number of hotel rooms blocked off so, unless you register early, you won't be guaranteed a hotel room. (3) There are a limited number of seats this year so unless you register early there is no guarantee that you will be able to register. Now, the good stuff: We have been blessed with three things that make for a GOOD conference. Four things that make for a GREAT conference. Five things that make for an INSANELY GREAT conference. Six things that make... I just don't have the words for the sixth and seventh thing.1. Great Sponsors 2 Diamond (FICO,No Magic) 2 Gold(PST,KBSC) 1 Silver (Drools) 1 Bronze (BizRules)2. Great Speakers see those above3. Great Meeting Place The BEST Hotel in Texas,The Adolphus in Dallas LocatedinthemiddleoftherestaurantdistrictofDowntownDallas 4. Great Attendees Uber-geeks, techies, super-nerds, CTOs, CEOs, (and all of the other terms that drive Jason up the wall) Business Analysts, Programmers, Research guys, Ph.D. Candidates, University Professors HR guys looking for rulebase engineers?5. White Papers will be published after the conference in a collection available either bound, printed format and/or online after the conference.6. Videos will be done properly this year by Greg Barton and Chelanie Israel such that the author will be talking at one corner of the screen and the presentation on the other side of the screen. (Very similar to what you see at parlays.com) These will be available after the conference with a password given at the conference itself or shortly thereafter.7. ConferencePresentations (PPTs or PDFs) will be available both during and after the conference with the assigned password for access during and after the conference.8. Great Location for food!The conference is located in the middle of the restaurant district of downtown Dallas and we will have listing of some of the ones that we know about.SDGJames C. OwenCo-Founder October Rules Festhttp://www.kbsc.comhttp://www.OctoberRulesFest.org"This above all: to thine own self be true,And it must follow, as the night the day,Thou canst not then be false to any man."Hamlet, Act 1, Scene IIIhttp://www-tech.mit.edu/Shakespeare/hamlet/hamlet.1.3.html[You can also replyTo:j...@kbsc.com]___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] StatefulKnowledgeSession leaves threads running
I have seen similar behavior, though at the time I didn't have the opportunity
to investigate the cause. (Sorry about not reporting it at the time.) Unlike
the code below it was while calling session.fireUntilHalt(). (In a seperate
thread.) After calling session.halt() from another thread the fireUntilHalt()
would exit, but the VM would not exit due to a non-daemon thread persisting.
--- On Thu, 7/16/09, Rafael Ribeiro rafae...@gmail.com wrote:
From: Rafael Ribeiro rafae...@gmail.com
Subject: Re: [rules-users] StatefulKnowledgeSession leaves threads running
To: Rules Users List rules-users@lists.jboss.org
Date: Thursday, July 16, 2009, 12:10 PM
Hi Edson!
as I've already mentioned I've modified the
sample so, if you get the StockTick sample and replace the
Main class this will run fine.
The sample shuts down fine but as I saw it sets the
JFrame uses frame.setDefaultCloseOperation(
WindowConstants.EXIT_ON_CLOSE ); which in turn makes the
trick.
Below the code of my modified main class:
package org.drools.examples.broker;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseConfiguration;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.conf.EventProcessingOption;
import org.drools.examples.broker.model.Company;
import org.drools.examples.broker.model.CompanyRegistry;
import org.drools.examples.broker.model.StockTick;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
import org.drools.runtime.rule.WorkingMemoryEntryPoint;
public class Main {
private static final String RULES_FILE =
/broker.drl;
static StatefulKnowledgeSession session;
static WorkingMemoryEntryPoint tickStream;
/**
* @param args
*/
public static void main(String[] args) throws
Exception {
// set up and show main window
CompanyRegistry companies = new
CompanyRegistry();
KnowledgeBuilder builder =
KnowledgeBuilderFactory.newKnowledgeBuilder();
try {
builder.add(
ResourceFactory.newInputStreamResource(
Main.class.getResourceAsStream( RULES_FILE ) ),
ResourceType.DRL);
} catch ( Exception e ) {
e.printStackTrace();
}
if( builder.hasErrors() ) {
System.err.println(builder.getErrors());
System.exit( 0 );
}
KnowledgeBaseConfiguration conf =
KnowledgeBaseFactory.newKnowledgeBaseConfiguration();
conf.setOption( EventProcessingOption.STREAM
);
KnowledgeBase kbase =
KnowledgeBaseFactory.newKnowledgeBase( conf );
kbase.addKnowledgePackages(
builder.getKnowledgePackages() );
session =
kbase.newStatefulKnowledgeSession();
session.setGlobal( services, new
BrokerServices() {
public void log(String message) {
System.out.println(message);
}
});
for( Company company :
companies.getCompanies() ) {
session.insert( company );
}
session.fireAllRules();
tickStream =
session.getWorkingMemoryEntryPoint( StockTick
stream );
for (int i=10;i0;i--) {
tickStream.insert(new
StockTick(RHT, i*10,
System.currentTimeMillis()));
session.getAgenda().getAgendaGroup(
evaluation ).setFocus();
session.fireAllRules();
}
session.dispose();
session.halt();
System.out.println(Still
running...);
}
}
regards,
Rafael Ribeiro
2009/7/16 Edson Tirelli tire...@post.com
Hi Rafael,
Are you setting the MultithreadEvaluation option or is
this using default options? Do you have an example code that
shows this behavior?
Thanks,
Edson
2009/7/16 Rafael Ribeiro rafae...@gmail.com
Hi all,
I've downloaded Drools fusion sample and started to
make some changes to
the code (first of all wipe out the UI so I can test it
easier).
I tried to get to a minimal set so I can run a console
main class and see
what happens but I am facing a strange behaviour.
As soon as I start pushing events into the
WorkingMemoryEntryPoint
(StockTick stream) a Thread - not daemonized
since it blocks shutdown from
ending - is spawned and this prevents my JVM from shutting
down (obviously
if I call System.exit(0) it will but I am avoiding this).
I've tried both to halt and dispose the session that
this entry point
belongs but with no success. Does anyone know how could I
get rid of this
thread?
best regards,
--
___
rules-users mailing list
rules-users@lists.jboss.org
Re: [rules-users] Using variables as map keys in MVEL in LHS
Thanks Edson, worked like a charm!
Steve Ronderos
rules-users-boun...@lists.jboss.org wrote on 07/16/2009 09:09:31 AM:
[image removed]
Re: [rules-users] Using variables as map keys in MVEL in LHS
Edson Tirelli
to:
Rules Users List
07/16/2009 09:11 AM
Sent by:
rules-users-boun...@lists.jboss.org
Please respond to Rules Users List
This was a bug in one of the MVEL versions that is fixed. Can you
update your MVEL jar to one of the latest releases? I think it is
2.0.12.
[]s
Edson
2009/7/16 Steve Ronderos steve.ronde...@ni.com
Hello,
Again, I'm working on converting my project that used Drools 4.0.7 to
5.0.1.
I've run across a problem with a rule that accesses a map in the LHS
using a variable as the key. When MVEL tries to resolve this, it
appears that it is not evaluating the variable before accessing the
map. I've modified the Shopping example from the Drools 5.0.1
Examples to recreate the issue in a simpler setting.
This is the rule (I removed all the other rules for this example)
rule Cart notification
salience 10
when
$p : Product( $productName : name)
$c : Customer( cart[$productName] == $p)
then
System.out.println( Customer + $c.name + has + $p.name
+ in cart);
end
I added the following to the Customer class:
private MapString,Product cart = new HashMapString, Product();
public MapString, Product getCart() {
return cart;
}
and I modified the main method to be:
public static final void main(String[] args) throws Exception {
final KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.
newKnowledgeBuilder();
kbuilder.add( ResourceFactory.newClassPathResource(
Shopping.drl, ShoppingExample.class ),
ResourceType.DRL );
final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( kbuilder.getKnowledgePackages() );
final StatefulKnowledgeSession ksession =
kbase.newStatefulKnowledgeSession();
Customer mark = new Customer( mark,
0 );
ksession.insert( mark );
Product shoes = new Product( shoes,
60 );
ksession.insert( shoes );
mark.getCart().put(shoes, shoes);
ksession.fireAllRules();
}
So basically, I added a map to Customer, inserted one item and made
a rule that will use a variable as a key for that map.
What I would expect to happen is:
the Product pattern would match the shoes Product that is inserted
into the ksession, the $productName variable would contain the value
shoes
the Customer fact, mark, would be matched with the second pattern
in the rule because cart[shoes] should resolve to the shoes fact
which is $p in the rule
The message should print
What actually happens is an error message:
Exception in thread main org.drools.RuntimeDroolsException:
Exception executing predicate cart[$productName] == $p
at org.drools.rule.PredicateConstraint.isAllowedCachedLeft(
PredicateConstraint.java:302)
at org.drools.common.SingleBetaConstraints.isAllowedCachedLeft(
SingleBetaConstraints.java:138)
at org.drools.reteoo.JoinNode.assertLeftTuple(JoinNode.java:114)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.doPropagateAssertLeftTuple(
SingleLeftTupleSinkAdapter.java:117)
at
org.drools.reteoo.SingleLeftTupleSinkAdapter.createAndPropagateAssertLeftTuple
(SingleLeftTupleSinkAdapter.java:78)
at org.drools.reteoo.LeftInputAdapterNode.assertObject(
LeftInputAdapterNode.java:142)
at
org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(
SingleObjectSinkAdapter.java:42)
at org.drools.reteoo.ObjectTypeNode.assertObject(
ObjectTypeNode.java:185)
at org.drools.reteoo.EntryPointNode.assertObject(
EntryPointNode.java:146)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:1046)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:1001)
at org.drools.common.AbstractWorkingMemory.insert(
AbstractWorkingMemory.java:788)
at org.drools.impl.StatefulKnowledgeSessionImpl.insert(
StatefulKnowledgeSessionImpl.java:216)
at
org.drools.examples.ShoppingExample.main(ShoppingExample.java:32)
Caused by: [Error: unable to resolve method: java.util.HashMap.
$productName() [arglength=0]]
[Near : {... Unknown }]
^
[Line: 1, Column: 0]
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getMethod(
ReflectiveAccessorOptimizer.java:906)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.getBeanProperty(
ReflectiveAccessorOptimizer.java:585)
at
org.mvel2.optimizers.impl.refl.ReflectiveAccessorOptimizer.compileGetChain(
[rules-users] Visu Nageswaran is out of the office.
I will be out of the office starting 17/07/2009 and will not return until 18/07/2009. I am in a training today. Response to emails would be delayed. For anything urgent, please call at +91-9884702390. ___ rules-users mailing list rules-users@lists.jboss.org http://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools Govnor DB configuration
Hi,
Thanks Jarek for your reply.
Still I have one doubt in my mind, how can I see the data for a newly
registered user (i.e name permission )
created through Drools Guvnor administrator functionality. Where should
I find the new user data(i.e. name permission assigned) , so that
I can write synch service to synch data from Drools Guvnor table to OFBiz
table.
Please help me to through out from this problem.
Thanks Regards
Pardeep Ruhil
LT Infotech Ltd
Mumbai
Ph: +919820283884
pardeep.ru...@lntinfotech.com wrote:
Hi,
I am using Apache OFBiz and had successfully integrated Drools Guvnor
war file with OFBiz.
By default Drools Guvnor supports Embedded derby, but in OFBiz i am
using MYSql , so i changed
the default embedded derby to MySql using repository.xml file by the
following code.
PersistenceManager
class=org.apache.jackrabbit.core.persistence.bundle.MySqlPersistenceManager
param name=url
value=jdbc:mysql://localhost:3306/drools/
param name=user value=root /
param name=password value=Newuser123 /
param name=schema value=mysql/
param name=schemaObjectPrefix
value=${wsp.name}_/
/PersistenceManager
Using this I successfully integrated Drools guvnor with same database as
I am using for OFBiz(MySql).
Now I have created a new user in Drools guvnor to create permission for
that user, but I am not able to see
where that username is stored in the database and in which entity or
table of MySql.
Also if i want to use the users available in OFBiz MySql database
entity say 'Userlogin' where i am storing all the list of userlogins,
how can
I retrieve the same and use this table data in drools Guvnor.
This can be done via JAAS - you just need to configure it to use a
particular table in mysql for retrieving user logins/passwords.
Keep in mind that this is just for authentication (to login).
Here's a list of all available login modules:
http://www.jboss.org/community/wiki/LoginModule
http://www.jboss.org/community/wiki/DatabaseServerLoginModule
Also when
I make a new user in Drools Govnor through
administrator, my data of new user should go to table 'UserLogin'.
AFAICT that's not possible and you need to synch your Guvnor user list
with the OFBiz user list by yourself.
Cheers,
Jarek
Please help me how this can be achieved in Drools Guvnor.
Thanks Regards
Pardeep Ruhil
LT Infotech Ltd
Mumbai
Ph: +919820283884
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