Re: [rules-users] ClassCastException and other problems
Hi Edson,
i have some problem...
*core_preference_text* this my table name.Row like VARIABLE_CODE
VARCHAR2(60 BYTE)
i need write dsl,dslr files related data validation to the table.
1. variable_code should be unieque per enterprise_id
2. variable_code can not be updated
give me some suggestion ..how to write dsl,dslr file related two
conditions.ASAP..
=
Chanti
On Fri, Jun 6, 2008 at 8:19 PM, Edson Tirelli [EMAIL PROTECTED] wrote:
Drools 5 implements a completely new propagation algorithm that
allowed us to get rid of shadow proxies from the core engine. So, you will
not have the problem.
But for 4.0.x, if you are a community user, best you can do is open a
JIRA with a test case to reproduce your problem. If we release a 4.0.8
version, we can fix your issue there, but at this moment we don't know if
there will be a 4.0.8 release or if the next release will be 5.0.
If you are a Drools subscriber at Red Hat, then you can simply open a
support case there and they will fix and provide a patch for you.
[]s
Edson
2008/6/6 Sibylle Duerr [EMAIL PROTECTED]:
Thanks Edson,
but the collections do return an empty collection. hm, I just tested this
ones again and it worked fine. no exception when the set was empty. I will
keep an eye on this and test some more but seems to work now for me.
and for the other problem I then hope for 5.0 :).
and what about the last problem I described before?
best regards
Sibylle
Edson Tirelli wrote:
Sibylle,
Unfortunately, this is the way it was implemented to be, under a
kind-of fail-fast philosophy we were following. I do think there is value
in changing things in 5.0 so that, for instance:
ProcessModel($activities : activities) from $models
Simply does not match, instead of raises a CCE, in case the model is a
TypeModel.
But for 4.0.x, that is how things work.
The only suggestion I can give you is, in your second problem, to not
return null on your collections. Simply return empty collections:
class Project {
...
public List getModels() {
if( this.models == null ) {
return Collections.emptyList();
}
return this.models;
}
...
}
This is usually a good thing, unless you have a specific semantics
for null collections in your domain model.
[]s
Edson
2008/6/6 Sibylle Duerr [EMAIL PROTECTED]:
Hi there,
I have three issues, where I'm not sure if these are bugs in
drools, or if this is just the way it has to be.
the used classes in this case are:
Project
Model
ProcessModel extends Model
only the Project is in the working memory, because I didn't want
to load all elements due to performance issues (there can be
thousends of elements to load at startup).
if I have the following rule:
Project($models : models)
ProcessModel($activities : activities) from $models
there happen to be two problems. if the project does not only
contain ProcessModels but also TypeModels or others (all extend
Model), this leads to a ClassCastException.
I can solve this by writing the rule as follows:
Project($models : models)
$m : Model(eval($m instanceof ProcessModel)) from $models
ProcessModel($activities : activities) from $m
but this is not really nice and I hope there is a better solution
for this, is there?
the second problem this rule gives me, is when the set 'models' is
empty. that will also throw an exception. to solve this I write:
$p : Project(eval($p.hasModels()), $models : models)
$m : Model(eval($m instanceof ProcessModel)) from $models
ProcessModel($activities : activities) from $m
and I need to use this in each case where I have possible empty sets.
the last problem I encountered when I tried to load all elements
to the working memory and then redefine some rules. used classes:
Aggregation extends DomainElement
rule:
Aggregation(owner.owner != type.owner)
causes some exception. the root exception is a ClassCastException:
ProxyShadowProxy cannot be cast to Aggregation.
when I rewrite the rule as:
$element : DomainElement(eval($element instanceof Aggregation))
Aggregation(owner.owner != type.owner) from $element
everything works fine. but that again is not a nice solution.
any help?
best regards
sibylle
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Edson Tirelli
JBoss Drools Core Development
Office: +55 11 3529-6000
Mobile: +55 11 9287-5646
JBoss, a division of Red Hat @ www.jboss.com http://www.jboss.com
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[rules-users] How to write related table dsl,dslr files
Hi , i have some problem... core_preference_text this my table name.Row like VARIABLE_CODE VARCHAR2(60 BYTE) i need write dsl,dslr files related data validation to the table. 1. variable_code should be unieque per enterprise_id 2. variable_code can not be updated give me some suggestion ..how to write dsl,dslr file related two conditions.ASAP.. = Chanti ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] JSR-94 and JEE integration
Hi, i would like to integrate drools in jee. to be more flexible i was loking at jsr-94. as i suppose jsr-94 only addresses j2se environment, my question is: how it is possible to use drools with this specs from an ejb3 session bean? my thoughts about this brought me to the idea of injecting the rules-administrator via resource annotation to prevent the container always doing a class.forname(..) lookup. to define a j2se resource in a jee container a jca might be the best way to integrate and to assure the jee specs will not be violated. but this seams a lot of overhead to me. how do u use drools in your jee applications when not relying on the brms? any help or ideas on integrating drools with jsr-94 in jee would be great. Knosta ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] JSR-94 and JEE integration
I know nothing about jsr-94, but we use drools in a webapp, servlet side only. It seems to me you could simply put your rules into a stateless session bean. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Knoster Sent: Tuesday, June 10, 2008 4:46 AM To: rules-users@lists.jboss.org Subject: [rules-users] JSR-94 and JEE integration Hi, i would like to integrate drools in jee. to be more flexible i was loking at jsr-94. as i suppose jsr-94 only addresses j2se environment, my question is: how it is possible to use drools with this specs from an ejb3 session bean? my thoughts about this brought me to the idea of injecting the rules-administrator via resource annotation to prevent the container always doing a class.forname(..) lookup. to define a j2se resource in a jee container a jca might be the best way to integrate and to assure the jee specs will not be violated. but this seams a lot of overhead to me. how do u use drools in your jee applications when not relying on the brms? any help or ideas on integrating drools with jsr-94 in jee would be great. Knosta ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: [rules-users] JSR-94 and JEE integration
We use JSR-94 and have a 'RuleLoader' that uses our rule definitions and a velocity script to generate the rules and creates a ruleset from that. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hehl, Thomas Sent: 10 June 2008 13:48 To: 'Rules Users List' Subject: RE: [rules-users] JSR-94 and JEE integration I know nothing about jsr-94, but we use drools in a webapp, servlet side only. It seems to me you could simply put your rules into a stateless session bean. -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Knoster Sent: Tuesday, June 10, 2008 4:46 AM To: rules-users@lists.jboss.org Subject: [rules-users] JSR-94 and JEE integration Hi, i would like to integrate drools in jee. to be more flexible i was loking at jsr-94. as i suppose jsr-94 only addresses j2se environment, my question is: how it is possible to use drools with this specs from an ejb3 session bean? my thoughts about this brought me to the idea of injecting the rules-administrator via resource annotation to prevent the container always doing a class.forname(..) lookup. to define a j2se resource in a jee container a jca might be the best way to integrate and to assure the jee specs will not be violated. but this seams a lot of overhead to me. how do u use drools in your jee applications when not relying on the brms? any help or ideas on integrating drools with jsr-94 in jee would be great. Knosta ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
RE: re[rules-users] -use of an object used in a previous rule
I can't see where you insert an object of type Alpha that would fire 'pack eco' -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Mounir Chattou Sent: 10 June 2008 10:34 To: rules-users@lists.jboss.org Subject: re[rules-users] -use of an object used in a previous rule Hi, I have a problem : a fact is inserted in a rule but when I cast for it in another, nothing happened, here is a simplified code to understand better : rule eco ruleflow-group economic salience 20 when a : Alpha() then Beta beta = new Beta() beta.add(a) beta.setStatus(eco) // the property status is setted insert(beta) end rule fl eco ruleflow-group economic salience 20 when f : Fl () then Fl fl = new Fl(); fl.add(f); fl.setStatus(eco)// the property status is setted insert(fl) end rule pack eco ruleflow-group economic when f : Fl(status == eco) //those two conditions are never casted ... while I inserted the facts a : Alpha(status == eco) then end Could someone explain me why ? -- View this message in context: http://www.nabble.com/re-use-of-an-object-used-in-a-previous-rule-tp17750384 p17750384.html Sent from the drools - user 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 mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Security, ldap and tomcat - Urgent please help
Can anybody see this? it still shows pending? jbossruler wrote: Hi, I deployed Drools onto Tomcat and I am trying to figure out how to get security to work. I want to use LDAP but I have no clue where to begin. All of the tutorials I see make use of JBoss AS. I do not have the option of using JBoss AS. Can somebody point me in the right direction or let me know how I can modify the components.xml file or the repository.xml file? What are the options besides using LDAP for security? I am using Drools 4.04 Really appreciate your help! -- View this message in context: http://www.nabble.com/Security%2C-ldap-and-tomcat---Urgent-please-help-tp17693453p17758182.html Sent from the drools - user 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] Accessing the fact model class files
Hi all, I create a *.pkg package with the BRMS and I want to access the class files from my fact model at runtime. I coud't find a way to do so in the org.drools.rule.Package API. Is there a way to do so? Thx, Tobi ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Security, ldap and tomcat
Hi, I deployed Drools onto Tomcat and I am trying to figure out how to get security to work. I want to use LDAP but I have no clue where to begin. All of the tutorials I see make use of JBoss AS. I do not have the option of using JBoss AS. Can somebody point me in the right direction or let me know how I can modify the components.xml file or the repository.xml file? What are the options besides using LDAP for security? I am using Drools 4.04 Really appreciate your help! -- View this message in context: http://www.nabble.com/Security%2C-ldap-and-tomcat-tp17693453p17693453.html Sent from the drools - user 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] Drools Maven repository error
All, I am getting the following error while updating drools 4.0.7 repo. using the following ant task artifact:dependencies pathId=dependency.class.path dependency groupId=org.drools artifactId=drools-repository version=4.0.7/ /artifact:dependencies OR using artifact:dependencies pathId=dependency.class.path dependency groupId=org.drools artifactId=drools-core version=4.0.7/ dependency groupId=org.drools artifactId=drools-compiler version=4.0.7/ /artifact:dependencies Here is the error == ant Buildfile: build.xml [artifact:dependencies] Downloading: org/drools/drools-repository/4.0.7/drools-repository-4.0.7.pom from central [artifact:dependencies] Downloading: org/drools/drools-repository/4.0.7/drools-repository-4.0.7.pom from central [artifact:dependencies] Downloading: org/drools/drools-repository/4.0.7/drools-repository-4.0.7.jar from central [artifact:dependencies] Downloading: org/drools/drools-repository/4.0.7/drools-repository-4.0.7.jar from central [artifact:dependencies] An error has occurred while processing the Maven artifact tasks. [artifact:dependencies] Diagnosis: [artifact:dependencies] [artifact:dependencies] Unable to resolve artifact: Missing: [artifact:dependencies] -- [artifact:dependencies] 1) org.drools:drools-repository:jar:4.0.7 [artifact:dependencies] [artifact:dependencies] Try downloading the file manually from the project website. [artifact:dependencies] [artifact:dependencies] Then, install it using the command: [artifact:dependencies] mvn install:install-file -DgroupId=org.drools -DartifactId=drools-repository -Dversion=4.0.7 -Dpackaging=jar -Dfile=/path/to/file [artifact:dependencies] [artifact:dependencies] Alternatively, if you host your own repository you can deploy the file there: [artifact:dependencies] mvn deploy:deploy-file -DgroupId=org.drools -DartifactId=drools-repository -Dversion=4.0.7 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id] [artifact:dependencies] [artifact:dependencies] Path to dependency: [artifact:dependencies] 1) org.apache.maven:super-pom:jar:2.0 [artifact:dependencies] 2) org.drools:drools-repository:jar:4.0.7 [artifact:dependencies] [artifact:dependencies] -- [artifact:dependencies] 1 required artifact is missing. [artifact:dependencies] [artifact:dependencies] for artifact: [artifact:dependencies] org.apache.maven:super-pom:jar:2.0 [artifact:dependencies] [artifact:dependencies] from the specified remote repositories: [artifact:dependencies] central (http://repo1.maven.org/maven2) [artifact:dependencies] BUILD FAILED /home/wojwang/workspace_5350/HibernateDrools/build.xml:13: Unable to resolve artifact: Missing: -- 1) org.drools:drools-repository:jar:4.0.7 Try downloading the file manually from the project website. Then, install it using the command: mvn install:install-file -DgroupId=org.drools -DartifactId=drools-repository -Dversion=4.0.7 -Dpackaging=jar -Dfile=/path/to/file Alternatively, if you host your own repository you can deploy the file there: mvn deploy:deploy-file -DgroupId=org.drools -DartifactId=drools-repository -Dversion=4.0.7 -Dpackaging=jar -Dfile=/path/to/file -Durl=[url] -DrepositoryId=[id] Path to dependency: 1) org.apache.maven:super-pom:jar:2.0 2) org.drools:drools-repository:jar:4.0.7 -- 1 required artifact is missing. for artifact: org.apache.maven:super-pom:jar:2.0 from the specified remote repositories: central (http://repo1.maven.org/maven2) = Thanks for your help. Regards Wilson ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] NoClassDefFoundError when dynamically updating rulebase for rule using 'accumulate' CE
I am dynamically adding/modifying rules (packages) to a loaded rule-base and having issues specifically when my rule contains accumulate CE. For an example, following is a rule which I am trying to add to my rulebase (which is already loaded in memory). rule 7d7fa7f1-164b-45a7-8e5a-c0c260815f9a enabled true salience 0 no-loop true agenda-group DATA_ARRIVAL when AgentID(agentId : agentId); DeviceData() Property(key==threshold,classifier==7d7fa7f1-164b-45a7-8e5a-c0c260815f9a.Condition0,$prop_threshold0 : value) $total0: Number( doubleValue $prop_threshold0) from accumulate( DataPoint( $value0: value ) from dataService.getDataPoints(5e0de623-9a25-45a1-8bc5-745254c2576e,SPEED,3), average( $value0) ) then agent.handleAction(rules.sl.7d7fa7f1-164b-45a7-8e5a-c0c260815f9a,0); end I am not getting any error (Rule validation or any other) when adding package with my rule to rulebase, but when getting following error, when rulebase is used thereafter: java.lang.NoClassDefFoundError: rules/sl/Rule_7d7fa7f1_164b_45a7_8e5a_c0c260815f9a_0 at rules.sl.Rule_7d7fa7f1_164b_45a7_8e5a_c0c260815f9a_0AccumulateExpression0Invoker.evaluate(Unknown Source) at org.drools.base.accumulators.JavaAccumulatorFunctionExecutor.reverse(JavaAccumulatorFunctionExecutor.java:91) at org.drools.rule.Accumulate.reverse(Accumulate.java:151) at org.drools.reteoo.AccumulateNode.modifyTuple(AccumulateNode.java:376) at org.drools.reteoo.AccumulateNode.retractObject(AccumulateNode.java:292) at org.drools.reteoo.SingleObjectSinkAdapter.propagateRetractObject(SingleObjectSinkAdapter.java:32) at org.drools.reteoo.RightInputAdapterNode.retractTuple(RightInputAdapterNode.java:124) at org.drools.reteoo.SingleTupleSinkAdapter.propagateRetractTuple(SingleTupleSinkAdapter.java:38) at org.drools.reteoo.FromNode.retractTuple(FromNode.java:130) at org.drools.reteoo.CompositeTupleSinkAdapter.propagateRetractTuple(CompositeTupleSinkAdapter.java:52) at org.drools.reteoo.JoinNode.retractTuple(JoinNode.java:231) at org.drools.reteoo.CompositeTupleSinkAdapter.propagateRetractTuple(CompositeTupleSinkAdapter.java:52) at org.drools.reteoo.JoinNode.retractObject(JoinNode.java:191) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateRetractObject(CompositeObjectSinkAdapter.java:375) at org.drools.reteoo.ObjectTypeNode.retractObject(ObjectTypeNode.java:189) at org.drools.reteoo.Rete.retractObject(Rete.java:215) at org.drools.reteoo.ReteooRuleBase.retractObject(ReteooRuleBase.java:211) at org.drools.reteoo.ReteooWorkingMemory.doRetract(ReteooWorkingMemory.java:79) at org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:1023) at org.drools.common.AbstractWorkingMemory.retract(AbstractWorkingMemory.java:982) at com.sensorlogic.rules.RuleAgent.retractMatchingFact(RuleAgent.java:283) at com.sensorlogic.rules.RuleAgent.processFact(RuleAgent.java:264) at com.sensorlogic.rules.RuleAgent.run(RuleAgent.java:342) at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675) at java.lang.Thread.run(Thread.java:595) I will appreciate any insight with this problem. My process of adding/updating rules dynamically works with all other rules I am using but only has issues with using 'accumulate' CE. Has someone encountered this before? Or just any ideas on what can cause NoClassDefFound for my added rule? -- View this message in context: http://www.nabble.com/NoClassDefFoundError-when-dynamically-updating-rulebase-for-rule-using-%27accumulate%27-CE-tp17765904p17765904.html Sent from the drools - user mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
