[rules-users] Drools low concurrency/high synchronization? !NOSIG!
Folks, I am currently trying to scale our implementation by farming out request into mutliple threads. I am on a 4 CPU Mac. A few things I am wondering about: 1. Although I see an increase in CPU load when going from single to multi-threaded processing the throughput increased marginally. I am pretty sure that my measurements are correct. I have checked the GC and this is not the source of congestion. My question here is whether Drools is using lot's of synchronization that may explain this. 2. When I share the RuleBase accross threads (which I think is valid?) I get interesting errors during execution. eg: org.drools.RuntimeDroolsException: Exception executing predicate [EMAIL PROTECTED] at org .drools .rule .PredicateConstraint.isAllowedCachedRight(PredicateConstraint.java:246) at org .drools .common .TripleBetaConstraints.isAllowedCachedRight(TripleBetaConstraints.java: 200) at org.drools.reteoo.JoinNode.assertObject(JoinNode.java:150) at org .drools .reteoo .CompositeObjectSinkAdapter .propagateAssertObject(CompositeObjectSinkAdapter.java:318) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java: 153) at org.drools.reteoo.Rete.assertObject(Rete.java:175) at org.drools.reteoo.ReteooRuleBase.assertObject(ReteooRuleBase.java: 192) at org .drools.reteoo.ReteooWorkingMemory.doInsert(ReteooWorkingMemory.java:71) at org .drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java: 909) at org .drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java: 881) at org .drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java: 682) at .DroolsPD.validate(DroolsPD.java:66) at .DroolsMTRunner.run(DroolsMTRunner.java:30) at java.lang.Thread.run(Thread.java:552) Caused by: org.mvel.CompileException: cannot invoke getter: getSAClass [declr.class: xxx.AbstractSA; act.class: null] at org .mvel.optimizers.impl.refl.GetterAccessor.getValue(GetterAccessor.java: 52) at org .mvel .optimizers.impl.refl.VariableAccessor.getValue(VariableAccessor.java: 39) at org .mvel .ast .VariableDeepPropertyNode .getReducedValueAccelerated(VariableDeepPropertyNode.java:22) at org .mvel .ast.PropertyASTNode.getReducedValueAccelerated(PropertyASTNode.java:21) at org .mvel .ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:21) at org.mvel.MVELRuntime.execute(MVELRuntime.java:88) at org.mvel.CompiledExpression.getValue(CompiledExpression.java:111) at org.mvel.MVEL.executeExpression(MVEL.java:235) at org .drools .base .mvel.MVELPredicateExpression.evaluate(MVELPredicateExpression.java:36) at org .drools .rule .PredicateConstraint.isAllowedCachedRight(PredicateConstraint.java:240) ... 13 more Caused by: java.lang.NullPointerException at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source) at sun .reflect .DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java: 25) at java.lang.reflect.Method.invoke(Method.java:324) at org .mvel.optimizers.impl.refl.GetterAccessor.getValue(GetterAccessor.java: 42) ... 22 more Details: * I use StatelessSessions which are private to the threads * No data is shared between threads (with the exception of the RuleBase, as outline above) * I am on JDK 1.5 I would be grateful for any pointers for 'correct' use of Drools in an MT environment. Cheers, Ingomar -- Ingomar Otter Chief Technology Officer mailto:[EMAIL PROTECTED] Mobile: +49 172 2367867 Valtech GmbH Bahnstraße 16 40212 Düsseldorf Germany Phone: +49 (0)211 179237-0 Fax: +49 211 179237-19 http://www.valtech.de Geschäftsführer: Ingo Kriescher Amtsgericht Düsseldorf HRB48672 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] 4.0.7 Maven Repo?
As 4.0.7 seems to be GA, will repository.jboss.com/maven2 also be updated? --I -- Ingomar Otter Chief Technology Officer mailto:[EMAIL PROTECTED] Mobile: +49 172 2367867 Valtech GmbH Bahnstraße 16 40212 Düsseldorf Germany Phone: +49 (0)211 179237-0 Fax: +49 211 179237-19 http://www.valtech.de Geschäftsführer: Ingo Kriescher Amtsgericht Düsseldorf HRB48672 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] maven repo
It was updated during the release. Check it out: http://repository.jboss.com/maven2/org/drools/ []s Edson Strange, it does not work for me: [INFO] Using default encoding to copy filtered resources. Downloading: http://repository.jboss.com/maven2/org/drools/drools/4.0.7/drools-4.0.7.pom 28K downloaded Downloading: http://repository.jboss.com/maven2/org/drools/drools/4.0.7/drools-4.0.7.jar Downloading: http://repo.open.iona.com/maven2-all/org/drools/drools/4.0.7/drools-4.0.7.jar Downloading: http://repo1.maven.org/maven2/org/drools/drools/4.0.7/drools-4.0.7.jar [INFO] [ERROR] BUILD ERROR [INFO] [INFO] Failed to resolve artifact. Missing: -- 1) org.drools:drools:jar:4.0.7 This is the dependency in my POM: dependency groupIdorg.drools/groupId artifactIddrools/artifactId version4.0.7/version /dependency --I -- Ingomar Otter Chief Technology Officer mailto:[EMAIL PROTECTED] Mobile: +49 172 2367867 Valtech GmbH Bahnstraße 16 40212 Düsseldorf Germany Phone: +49 (0)211 179237-0 Fax: +49 211 179237-19 http://www.valtech.de Geschäftsführer: Ingo Kriescher Amtsgericht Düsseldorf HRB48672 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Compilation error: Syntax error, insert ; to complete BlockStatements
Kris,
that may be silly but have you tried to add the ; after
'addCharge($event, $amount)'?
If you use the Java dialect for the RHS this IS mostly Java (it's just
copied over into the generated code).
If in doubt, use -Ddrools.dump.dir=whatever to check out the
generated code.
--I
Am 09.07.2008 um 21:59 schrieb Kris Nuttycombe:
Hi, all,
I'm new to Drools, and am a bit confused by the compilation error that
I'm getting. From the line number, it appears to be in a generated
Java file instead of in my rules file, so I'm having a hard time
debugging the issue. Here is the full error:
Rule Compilation error : [Rule name=Assert Total Accumulator for
Order, agendaGroup=init, salience=0, no-loop=false]
com/gaiam/gcsi/rules/Rule_Assert_Total_Accumulator_for_Order_0.java
(7:429) : Syntax error, insert ; to complete BlockStatements
Here is the rule that's being referred to:
rule Add charge amounts to total.
agenda-group calc_total
when
$total : Total()
$event : ProgramBillingEvent( $amount : amount)
then
modify( $total ) {
addCharge($event, $amount)
}
end
I'm working from the example modify block discussed in the docs at
http://downloads.jboss.com/drools/docs/4.0.7.19894.GA/html/ch02s05.html#d0e961
- I haven't been able to find other documentation referring to this
construct.
What am I doing wrong?
Thanks,
Kris
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Re: [rules-users] Is or allowed in a rule? Can I link the rules?
1. Seems to me that the conditions in a rule are always connected with AND relation: True. AND is the default. Is or allowed? I mean , can I express: if (C1 or C2 or C3) and C4, then D1 in 1 rule? You can have an explicit OR, see section 6.5.2.3 of the 4.0.7 documentation. Can I form a link of rules? Can rule A's decision (the Then part) be rule B's condition (The When part)? for instance: rule A: if C1, C2, C3 then D1 rule B: if D1, C4 then D2 usually the consequence (RHS) of would modify facts which you can test in rule B. A common way is to assert a fact. When the complexity increases, the number of rules explodes. What's your definition of explodes? This suggest that you should have another go at your rule/fact model. Cheers, --Ingomar Am 24.07.2008 um 17:25 schrieb Yu Wang: I'm a beginner user of Jboss, please bear with my maybe dumb questions: 1. Seems to me that the conditions in a rule are always connected with AND relation: such as the following rule if C1 C2 C3 then D1 it means if C1 and C2 and C3, then D1 Is or allowed? I mean , can I express: if (C1 or C2 or C3) and C4, then D1 in 1 rule? Right now, I can only use 3 rules to express it: if C1 C4 then D1 if C2 C4 then D1 if C3 C4 then D1 2. Can I form a link of rules? Can rule A's decision (the Then part) be rule B's condition (The When part)? for instance: rule A: if C1, C2, C3 then D1 rule B: if D1, C4 then D2 When the complexity increases, the number of rules explodes. I browsed the document and didn't find a clue. I'm using the 4.0.7. Your help is highly appreciated. ___ 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] Handle activationCancelled Event
Why don't you use facts for control?
when mylamp==on
then
assert/update sth?
That looks easier to me.
--I
Am 25.07.2008 um 13:04 schrieb Claudio Rainoldi:
Hi everyone,
i'm developing a java application using drools 4 for domotic control;
i ve implemented a listener on my working memory with the method
afterActivationFired(...)
and activationCancelled(...) .
At startup of my app i've write the following lines:
listener = *new* FiredRulesListener();
workingMemory.addEventListener(listener);
Each time a rule is fired the method afterActivationFired(...) is
called and
it is ok; but when the rule stop to be true the method
activationCancelled isn't
never called.
I try to be more clear:
i 've the following rule:
when mylamp==on
then
System.out.println(light 1 on);
When i turn on the light 1 the method afterActivationFired(...) is
called,
but when i turn off the light the method activationCancelled isn't
called.
Can someboy help me??
Thanks in advance.
Cla
My listener code:
*
public* *static* *class* FiredRulesListener
*extends*DefaultAgendaEventListener
{
ListRule firedRules = *new* ArrayListRule();
*
public* ListRule getFiredRules()
{
*
return* *this*.firedRules;
}
@Override
*
public* *void* afterActivationFired(AfterActivationFiredEvent event,
WorkingMemory workingMemory)
{
Rule rule = event.getActivation().getRule();
*
if* (!*this*.firedRules.contains(rule))
*this*.firedRules.add(rule);
}
@Override
*
public* *void* activationCancelled (ActivationCancelledEvent event,
WorkingMemory workingMemory)
{
*System.out.println(i never see this message);*
Rule *rule*= event.getActivation().getRule();
*this*.firedRules.remove(rule);
}
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Re: [rules-users] enums
I don't understand the structure, could you post more source please? --I Am 28.07.2008 um 13:43 schrieb thomas kukofka: =Field/method 'InputObject' not found for class 'com.rules.InputObject'Rule ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] query or global
what are disadvantages and advantages of the following possibillities to to get access to working memory facts from outside: Is there a reason why you want to use something other than queries? I would suggest to use queries _unless_ you have a definitive requirement that requires something else. Queries are easy and you get constraints for free. Everything else is just work. ;-) If you need to use logicals, you also have to implement an event listener in your facts to track them properly. Cheers --I Am 28.07.2008 um 15:15 schrieb thomas kukofka: Hello again, what are disadvantages and advantages of the following possibillities to to get access to working memory facts from outside: - -uses a query: in drl: query queryname ... end in java code queryResults results = workingMemory.getQueryResults( queryname ); - -use globals that store facts: global java.util.HashMap service rule XY when f: FactX () then ResultFact resultFact = new ResultFact(); service.put(f.getName(), resultFact); insert(resultFact); end kind regards tom ___ 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] Measuring Drools Memory Usage
We used two approaches to double check results. At first we used an approach similiar to what you haved described. Please note that (depneding on platfom) freeMemory is not byte- exact). Wo you won't see little changes. Also, if you were using stateless sessions the result you have seen may be correct. Out other approach was to seriazie that parts we're instrested in (and assume that real memory usage is just an small factor to be applied to the result we go. We then compared the two results and they agreed on the order of magnitude which was what were looking for. However we were primarily looking at Rulebase sizes, not WM memory consumption - which for the application we are currently are working on is neglegctible. Has anyone attempted to measure the incremental memory usage of using Drools Do you expect an incremental memory usage (aka memory leak) using Drools? I don't ;-) You may want to run your use-case let's say 100.000 times to easiert to measure results. --I Am 29.07.2008 um 03:11 schrieb Roger Tanuatmadja: Hi, Has anyone attempted to measure the incremental memory usage of using Drools? Anyone cares to share their methodology? I am currently following the following methodology: 1. Prevent garbage collection from happening by using large Xms Xmx (1024m in my case), a NewRatio of 2 (I am sure other sizes will work as well) and verbogegc enabled to confirm that no garbage collection is happening. 2. Use Runtime.freeMemory before and after fireAllRules and measuring the difference. The problem with my methods so far has been that after a positive memory usage (indicating you are using memory), subsequent use case (the same one) incurs zero memory usage which is very strange. So I guess my question is 2 fold: anyone care to share their methodology, and can anyone see what's wrong with mine? Thanks, Roger ___ 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] Discover when a rule isn't more active
Use logicals. Am 29.07.2008 um 11:20 schrieb Claudio Rainoldi: Hi everyone, isn'it there a way to find when a rule isn't more active. For example if i have this rule: rule light 2 on dialect java when Light (name==0/0/2, actualvalue==1); then System.out.println(luce 2 on); end when someone turn on the light 2 i discover that the rule is fired using an Agenda Event Listener and the method afterActivationFired; But when someone turn off the ligth isn't there a similar way to discover that the rule light 2 on isn't more active. My only solution is to use the dual rule: rule light 2 on_dual dialect java when not (Light (name==0/0/2, actualvalue==1)); then System.out.println(luce 2 off); end Isn't there a more sample way to do this? Thanks in advance. Cla ___ 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] Discover when a rule isn't more active
There is a mechanism called truth maintenance ensuring for example A - B B - C that C becomes false when it's premise (B) becomes false as well. What it basically does it track the LHS side of the rule and undoes asserted facts when there are no more facts to support it (activate the rules in question). Look at the documentation for logicals / truth mainteance. It's pretty cool. For your case: rule light2on when LIght(name==0/0/2, actualvalue==1) then insertLogical( new LightIsOn(2)) end the fact LightIsOn will only be true (in the working memory) as long as the LHS of the rule above is still true. For example if acutalvalue becomes 0, that fact would vanish automagically. That implies that you use facts to make statements about your system (not using behind the scene callbacks) - but from my very little experience I would say this is a good practice anyway. Fiddeling with activations make me suspicious ;-) - But then it all depends on your particular problem at hand. --I rule light 2 on dialect java when Light (name==0/0/2, actualvalue==1); then System.out.println(luce 2 on); end Am 29.07.2008 um 14:42 schrieb Claudio Rainoldi: i'm sorry i'm a new drools user.. Can you try to be a little more clear? thanks.. 2008/7/29, Ingomar Otter [EMAIL PROTECTED]: Use logicals. Am 29.07.2008 um 11:20 schrieb Claudio Rainoldi: Hi everyone, isn'it there a way to find when a rule isn't more active. For example if i have this rule: rule light 2 on dialect java when Light (name==0/0/2, actualvalue==1); then System.out.println(luce 2 on); end when someone turn on the light 2 i discover that the rule is fired using an Agenda Event Listener and the method afterActivationFired; But when someone turn off the ligth isn't there a similar way to discover that the rule light 2 on isn't more active. My only solution is to use the dual rule: rule light 2 on_dual dialect java when not (Light (name==0/0/2, actualvalue==1)); then System.out.println(luce 2 off); end Isn't there a more sample way to do this? Thanks in advance. Cla ___ 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 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Not Non-Existential Quantifier
Hans, If you change not NegativeResult() to not (exits NegativeResult()) this should result in the expected behaviour. Cheers, Ingomar Am 31.07.2008 um 17:19 schrieb [EMAIL PROTECTED]: How is not supposed to work with insertLogical? Assume I have two different rules whose conditions are mutually exclusive, like the following: rule Rule One when not NegativeResult() then insertLogical(new ApplicantStatus(Approved)); end rule Rule Two when NegativeResult() then insertLogical(new ApplicantStatus(Denied)); end Assume that the above two rules are the only way an ApplicantStatus fact can be inserted into working memory. I would expect, after all rules are run, that it would be impossible for there to be one ApplicantStatus with Approved as its reason, and another with Denied as its reason, in the working memory. I would expect that, before any NegativeResult is inserted, that rule one could run, and insert an ApplicantStatus fact with an Approved reason. Then, after a NegativeResult is inserted, that rule two could run, and insert an ApplicantStatus fact with a Denied reason. At this point I would expect that the original ApplicantStatus fact, with an Approved reason, would be retracted, since the conditions under which it was inserted are no longer true. This is not what I am observing, however. I am finding ApplicantStatus facts with both reasons in working memory at the end of the rules run. Should not work as I expect with regard to inserting a fact via insertLogical()? Or is this a known limitation, or simply the way it is designed to work? Thanks, -Hans___ 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] Not Non-Existential Quantifier
Hans, I checked the docs and as Edson says it should work without the exists( ). Strange that never worked for me. Maybe we all learn something if you can carve out a test-case. Strange. --I Am 31.07.2008 um 19:29 schrieb [EMAIL PROTECTED]: Ingomar, I tried this, and indeed that worked. I was surprised, as I thought not was meant more to mean that a fact inside its parentheses did not exist, rather than a logical negation, which is the way you used it in your example. However, if I do what you said, it does work exactly how I expected not alone to work. Thanks! -Hans -- Original message -- From: Ingomar Otter [EMAIL PROTECTED] Hans, If you change not NegativeResult() to not (exits NegativeResult()) this should result in the expected behaviour. Cheers, Ingomar Am 31.07.2008 um 17:19 schrieb [EMAIL PROTECTED]: How is not supposed to work with insertLogical? Assume I have two different rules whose conditions are mutually exclusive, like the following: rule Rule One when not NegativeResult() then insertLogical(new ApplicantStatus(Approved)); end rule Rule Two when NegativeResult() then insertLogical(new ApplicantStatus(Denied)); end Assume that the above two rules are the only way an ApplicantStatus fact can be inserted into working memory. I would expect, after all rules are run, that it would be impossible for there to be one ApplicantStatus with Approved as its reason, and another with Denied as its reason, in the working memory. I would expect that, before any NegativeResult is inserted, that rule one could run, and insert an ApplicantStatus fact with an Approved reason. Then, after a NegativeResult is inserted, that rule two could run, and insert an ApplicantStatus fact with a Denied reason. At this point I would expect that the original ApplicantStatus fact, with an Approved reason, would be retracted, since the conditions under which it was inserted are no longer true. This is not what I am observing, however. I am finding ApplicantStatus facts with both reasons in working memory at the end of the rules run. Should not work as I expect with regard to inserting a fact via insertLogical()? Or is this a known limitation, or simply the way it is designed to work? Thanks, -Hans___ 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 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Caching RuleBase in Drools
Typically, a rulebase would be generated and cached on first use; to save on the continually re-generation of the Rule Base; which is expensive. Read: Cache the rulebase (the rulebase object) with a Cache mechanism of your choice. AFAIK there is no dedicated caching mechanism in Drools per se. This makes sense, otherwise the next person would look for cache distribution, cache synchronization in a cluster. A can of worms that should not be touched. For example we use JBOSS TreeCache and are happy with it. This may be overkill, simpler implementations like oscache may just be fine - all depends on your requirements and deployment situation. Cheers, Ingomar Am 11.08.2008 um 13:50 schrieb raj_drools: Hi , i'm trying to implement caching of rules . in the manual there is a statement as follows : Typically, a rulebase would be generated and cached on first use; to save on the continually re-generation of the Rule Base; which is expensive. how does rule base caches rules ? is there any method to cache the rules ? how can i implement caching in Drools in order to avoid loading rules all the times ? -- View this message in context: http://www.nabble.com/Caching-RuleBase-in-Drools-tp18924137p18924137.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] Salience not being considered in DSL
Hello Harsh, The problem I am facing is that the salience specified in the drl is not being used. Please elaborate, this is a too general question. So the salience is present in the generated drl? Salience (by default) defines the execution order of those rules which are activated (=their LHS is true). If rules changes facts which causes other rules to activate (which is just fine) you may see a different order of rules firing. A good way to understand what's going on inside is the Audit View in Eclipse. Have/can you try this? -Ingomar Am 11.08.2008 um 11:26 schrieb Harsh Jetly: Hi , I am using Drools version 4.0.4. I have created a dsl file for my drl ,I have set a salience for each rule . The problem I am facing is that the salience specified in the drl is not being used. Now when I use the drl without the dsl . Things work just fine and the salience is used . What should be done ? Regards Harsh Jetly SOA Center of Excellence Larsen Toubro Infotech Ltd. www.Lntinfotech.com This Document is classified as: |--| | [X] | |--|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 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] Update vs insert
Ehm, I would think that unless person implements a PropertyChangeListener, you need to tell the engine about the change of the slot. Update would be the proper way AFAIK. In this case, I don't see why one would want to insert an object into WM - as it is already in WM. I think the exact result of the insert depends on whether you have implemented equals/hashCode properly. But again, in that example I understand that you want to change the property of an object you have matched in the LHS. The way to do this is using update(). -- Ingomar Am 11.09.2008 um 12:39 schrieb Shyam, Pallav (MSCIBARRA): Very strange. The facts are passed into the WM by-reference. Therefore the query should work after calling the person.setClassName(Math) on the fact. And this should work without calling the insert or update. This leaves me guessing that the query does not work on the facts directly, instead they work on shadow facts. From: [EMAIL PROTECTED] To: Rules Users List Sent: Thu Sep 11 04:41:37 2008 Subject: [rules-users] Update vs insert Hello, What is the difference between calling insert and update in a rule file? When I use insert my queries don’t work, but if I use update they seem to. I don't mind using update, but I would like to understand the difference between the two. Here is my rule file. rule Add person to math class no-loop when person : Person(likesMath == true) then person.setClassName(Math); insert(person); end I also have a query: query getPeopleForClass(String _className) Person(className == _className) end When I add two facts to working memory, where the likesMath attribute is true, then run my query I get zero results back. When I change the rule, Add person to math class, to use update(person) instead of insert(person) two students are returned. Any help would be appreciated. Thanks, Dan Daniel Quinn Fedex - Custom Critical Software Specialist I 234.310.4090(x2586) -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] ] On Behalf Of [EMAIL PROTECTED] Sent: Wednesday, September 10, 2008 2:27 PM To: rules-users@lists.jboss.org Subject: [rules-users] Re: looping problem Hello, thanks that works. I just forgot to set the focus in the init rule.. Regards Thomas ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users https://lists.jboss.org/mailman/listinfo/rules-users NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege. Use of this email is prohibited when received in error. ___ 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] Problem with setting a Global
You have to declare the global in the rule package.
global foo.bar.Logger logger;
--Ingomar
Am 11.09.2008 um 18:24 schrieb Earnest Dyke:
Greetings all,
I have the following Java code and rule. When executed I get an
Unexpected Global exception (see below). What am I doing wrong?
@In WorkingMemory wm
@Logger Log log;
public void calculate() {
wm.setGlobal(logger,log);
wm.insert(calcResult);
wm.fireAllRules();
}
rule Calc
when
$c : CalcResult();
then
log(drools.getRule().getName(),log);
// Do calculation
end
function void log(String msg, Log log) {
log.debug(msg,new Object[]{});
}
When the calculate method is executed I get the following exception:
java.lang.RuntimeException: Unexpected global [logger]
at
org
.drools
.common.AbstractWorkingMemory.setGlobal(AbstractWorkingMemory.java:
367)
at
org.ebsinc.ia.action.AnalysisAction.createData(AnalysisAction.java:93)
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 org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at
org
.jboss
.seam
.intercept.RootInvocationContext.proceed(RootInvocationContext.java:
31)
at
org
.jboss
.seam
.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
56)
at
org
.jboss
.seam
.core.BijectionInterceptor.aroundInvoke(BijectionInterceptor.java:46)
at
org
.jboss
.seam
.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
68)
at
org
.jboss
.seam
.persistence
.ManagedEntityIdentityInterceptor
.aroundInvoke(ManagedEntityIdentityInterceptor.java:48)
at
org
.jboss
.seam
.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
68)
at
org
.jboss
.seam
.transaction
.RollbackInterceptor.aroundInvoke(RollbackInterceptor.java:31)
at
org
.jboss
.seam
.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
68)
at
org
.jboss
.seam
.core
.MethodContextInterceptor.aroundInvoke(MethodContextInterceptor.java:
42)
at
org
.jboss
.seam
.intercept.SeamInvocationContext.proceed(SeamInvocationContext.java:
68)
at
org.jboss.seam.intercept.RootInterceptor.invoke(RootInterceptor.java:
106)
at
org
.jboss
.seam
.intercept
.JavaBeanInterceptor.interceptInvocation(JavaBeanInterceptor.java:155)
at
org
.jboss
.seam.intercept.JavaBeanInterceptor.invoke(JavaBeanInterceptor.java:
91)
at org.ebsinc.ia.action.AnalysisAction_$
$_javassist_9.createData(AnalysisAction_$$_javassist_9.java)
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 org.jboss.seam.util.Reflections.invoke(Reflections.java:21)
at org.jboss.seam.util.Reflections.invokeAndWrap(Reflections.java:
125)
at org.jboss.seam.Component.callComponentMethod(Component.java:2074)
at org.jboss.seam.Component.callCreateMethod(Component.java:1997)
at org.jboss.seam.Component.newInstance(Component.java:1968)
at org.jboss.seam.Component.getInstance(Component.java:1865)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at org.jboss.seam.Component.getInstanceFromFactory(Component.java:
1911)
at org.jboss.seam.Component.getInstance(Component.java:1855)
at org.jboss.seam.Component.getInstance(Component.java:1832)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:55)
at org.jboss.seam.Namespace.getComponentInstance(Namespace.java:50)
at org.jboss.seam.Namespace.get(Namespace.java:28)
at
org
.jboss.seam.el.SeamELResolver.resolveInNamespace(SeamELResolver.java:
197)
at org.jboss.seam.el.SeamELResolver.getValue(SeamELResolver.java:57)
at javax.el.CompositeELResolver.getValue(CompositeELResolver.java:53)
at
com
.sun
.faces
.el.FacesCompositeELResolver.getValue(FacesCompositeELResolver.java:
64)
at
org
.jboss.el.parser.AstPropertySuffix.getValue(AstPropertySuffix.java:53)
at org.jboss.el.parser.AstValue.getValue(AstValue.java:67)
at
org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:
186)
at
com
.sun.facelets.el.TagValueExpression.getValue(TagValueExpression.java:
71)
at
javax
.faces
.component
.ValueBindingValueExpressionAdapter
.getValue(ValueBindingValueExpressionAdapter.java:102)
at com.sun.facelets.component.UIRepeat.getValue(UIRepeat.java:143)
at com.sun.facelets.component.UIRepeat.getDataModel(UIRepeat.java:
121)
at
[rules-users] Disabling pattern matching alltogether for set of rules?
Folks, we have a scenario where we are applying rules with complex in their LHS at the end of our rule processing. Today we just use a low salience to achieve this. Obviously, these rules are included in the pattern matching and in the agenda updates for all preceding changes to the WM. We do quite some changes to the facts during our regular processing so unnecessary pattern-matching/agenda updates are performed. I have looked at rule-flow, agenda-groups etc but one thing I could not figure out by studying the documentation: Which is the (best) way to exclude certain rules from pattern matching (switch them off alltogether) so that we can delay the pattern matching until the facts have stabilized? Cheers, Ingomar ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Disabling pattern matching alltogether for set of rules?
Sorry, ...with complex _joins__ in their LHS ... Am 16.09.2008 um 14:17 schrieb Ingomar Otter: Folks, we have a scenario where we are applying rules with complex in their LHS at the end of our rule processing. Today we just use a low salience to achieve this. Obviously, these rules are included in the pattern matching and in the agenda updates for all preceding changes to the WM. We do quite some changes to the facts during our regular processing so unnecessary pattern-matching/agenda updates are performed. I have looked at rule-flow, agenda-groups etc but one thing I could not figure out by studying the documentation: Which is the (best) way to exclude certain rules from pattern matching (switch them off alltogether) so that we can delay the pattern matching until the facts have stabilized? Cheers, Ingomar ___ 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] memory issue when listening to market data
Given the information remote diagnosis is not feasible. I would suggest to have a look at the heap ... to see where things are going. See http://weblogs.java.net/blog/kellyohair/archive/2005/09/heap_dump_snaps.html --Ingomar Am 29.09.2008 um 17:30 schrieb Cheng, Ping: All, I wrote a server which listens to the market data and generates alerts based on some conditions. It listens to about 300 symbols and contains 30 simple rules. It works fine when the market is quiet. It uses about 500 M in memory and there is no big difference between reports from top and jconsole. When market is busy, memory displayed in jconsole is still ok, but top reports much more memory and it did not come down at all. Sometimes it could reach 50G when it's a crazy day. I used jmap to check the memory map and it looks fine from java view, I wonder if drools hold something when it's very busy? What is supposed to happen if drools could not handle the work load? Thanks for your help. -Ping - The information contained in the linked e-mail transmission and any attachments may be privileged and confidential and is intended only for the use of the person(s) named in the linked e-mail transmission. If you are not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you should not review, disseminate, distribute or duplicate this e-mail transmission or any attachments . If you are not the intended recipient, please contact the sender immediately by reply e-mail and destroy all copies of the original message. We do not accept account orders and/or instructions related to AllianceBernstein products or services by e- mail, and therefore will not be responsible for carrying out such orders and/or instructions. The linked e-mail transmission and any attachments are provided for informational purposes only and should not be construed in any manner as any solicitation or offer to buy or sell any investment opportunities or any related financial instruments and should not be construed in any manner as a public offer of any investment opportunities or any related financial instruments. If you, as the intended recipient of the linked e-mail transmission, the purpose of which is to inform and update our clients, prospects and consultants of developments relating to our services and products, would not like to receive further e-mail correspondence from the sender, please reply to the sender indicating your wishes. Although we attempt to sweep e-mail and attachments for viruses, we will not be liable for any damages arising from the alteration of the contents of this linked e-mail transmission and any attachments by a third party or as a result of any virus being passed on. Please note: Trading instructions sent electronically to Bernstein shall not be deemed accepted until a representative of Bernstein acknowledges receipt electronically or by telephone. Comments in the linked e-mail transmission and any attachments are part of a larger body of investment analysis. For our research reports, which contain information that may be used to support investment decisions, and disclosures, see our website at www.bernsteinresearch.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] memory issue when listening to market data
Ping, I think you should focus on the content of your heap and not on the specific size. So here are my 0.02EUR: 1. get a working heap dump (google is your friend) 2. Inspect the heap (dont focus on measuring it too much) #2 should give you an idea what is consuming the memory and thus should give you a starting point. By the way: top reports the amount of memory the VM has allocated and the amount of physical memory consumed. Due to Java heap dynamics this is only somewhat coupled to the actual memory consumption of the VM. But unless you start the VM with weird -X/-XX switches the memory allocated / consumed should come down a while as the VM shrinks the heap. So if it's not doing this the app is not releasing the objects. This is probably an application and not a Drools issue. -I Am 29.09.2008 um 19:06 schrieb Cheng, Ping: Ingomar, I tried jmap -heap:format=b, but got some errors and jhat could not parse the dump file. Then I tried jmap -histo and I added up all objects' memory and it pretty much matched what I saw from jconsole. Is there any chance that jmap -histo and -heap return different result? Thanks. -Ping -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ingomar Otter Sent: Monday, September 29, 2008 12:47 PM To: Rules Users List Subject: Re: [rules-users] memory issue when listening to market data Given the information remote diagnosis is not feasible. I would suggest to have a look at the heap ... to see where things are going. See http://weblogs.java.net/blog/kellyohair/archive/2005/09/heap_dump_snaps . html --Ingomar Am 29.09.2008 um 17:30 schrieb Cheng, Ping: All, I wrote a server which listens to the market data and generates alerts based on some conditions. It listens to about 300 symbols and contains 30 simple rules. It works fine when the market is quiet. It uses about 500 M in memory and there is no big difference between reports from top and jconsole. When market is busy, memory displayed in jconsole is still ok, but top reports much more memory and it did not come down at all. Sometimes it could reach 50G when it's a crazy day. I used jmap to check the memory map and it looks fine from java view, I wonder if drools hold something when it's very busy? What is supposed to happen if drools could not handle the work load? Thanks for your help. -Ping - The information contained in the linked e-mail transmission and any attachments may be privileged and confidential and is intended only for the use of the person(s) named in the linked e-mail transmission. If you are not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you should not review, disseminate, distribute or duplicate this e-mail transmission or any attachments . If you are not the intended recipient, please contact the sender immediately by reply e-mail and destroy all copies of the original message. We do not accept account orders and/or instructions related to AllianceBernstein products or services by e- mail, and therefore will not be responsible for carrying out such orders and/or instructions. The linked e-mail transmission and any attachments are provided for informational purposes only and should not be construed in any manner as any solicitation or offer to buy or sell any investment opportunities or any related financial instruments and should not be construed in any manner as a public offer of any investment opportunities or any related financial instruments. If you, as the intended recipient of the linked e-mail transmission, the purpose of which is to inform and update our clients, prospects and consultants of developments relating to our services and products, would not like to receive further e-mail correspondence from the sender, please reply to the sender indicating your wishes. Although we attempt to sweep e-mail and attachments for viruses, we will not be liable for any damages arising from the alteration of the contents of this linked e-mail transmission and any attachments by a third party or as a result of any virus being passed on. Please note: Trading instructions sent electronically to Bernstein shall not be deemed accepted until a representative of Bernstein acknowledges receipt electronically or by telephone. Comments in the linked e-mail transmission and any attachments are part of a larger body of investment analysis. For our research reports, which contain information that may be used to support investment decisions, and disclosures, see our website at www.bernsteinresearch.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] memory issue when listening to market data
This may be a good starting point Troubleshooting and Diagnostic Guide http://java.sun.com/j2se/1.5/pdf/jdk50_ts_guide.pdf --I Am 29.09.2008 um 19:06 schrieb Cheng, Ping: Ingomar, I tried jmap -heap:format=b, but got some errors and jhat could not parse the dump file. Then I tried jmap -histo and I added up all objects' memory and it pretty much matched what I saw from jconsole. Is there any chance that jmap -histo and -heap return different result? Thanks. -Ping -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ingomar Otter Sent: Monday, September 29, 2008 12:47 PM To: Rules Users List Subject: Re: [rules-users] memory issue when listening to market data Given the information remote diagnosis is not feasible. I would suggest to have a look at the heap ... to see where things are going. See http://weblogs.java.net/blog/kellyohair/archive/2005/09/heap_dump_snaps . html --Ingomar Am 29.09.2008 um 17:30 schrieb Cheng, Ping: All, I wrote a server which listens to the market data and generates alerts based on some conditions. It listens to about 300 symbols and contains 30 simple rules. It works fine when the market is quiet. It uses about 500 M in memory and there is no big difference between reports from top and jconsole. When market is busy, memory displayed in jconsole is still ok, but top reports much more memory and it did not come down at all. Sometimes it could reach 50G when it's a crazy day. I used jmap to check the memory map and it looks fine from java view, I wonder if drools hold something when it's very busy? What is supposed to happen if drools could not handle the work load? Thanks for your help. -Ping - The information contained in the linked e-mail transmission and any attachments may be privileged and confidential and is intended only for the use of the person(s) named in the linked e-mail transmission. If you are not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you should not review, disseminate, distribute or duplicate this e-mail transmission or any attachments . If you are not the intended recipient, please contact the sender immediately by reply e-mail and destroy all copies of the original message. We do not accept account orders and/or instructions related to AllianceBernstein products or services by e- mail, and therefore will not be responsible for carrying out such orders and/or instructions. The linked e-mail transmission and any attachments are provided for informational purposes only and should not be construed in any manner as any solicitation or offer to buy or sell any investment opportunities or any related financial instruments and should not be construed in any manner as a public offer of any investment opportunities or any related financial instruments. If you, as the intended recipient of the linked e-mail transmission, the purpose of which is to inform and update our clients, prospects and consultants of developments relating to our services and products, would not like to receive further e-mail correspondence from the sender, please reply to the sender indicating your wishes. Although we attempt to sweep e-mail and attachments for viruses, we will not be liable for any damages arising from the alteration of the contents of this linked e-mail transmission and any attachments by a third party or as a result of any virus being passed on. Please note: Trading instructions sent electronically to Bernstein shall not be deemed accepted until a representative of Bernstein acknowledges receipt electronically or by telephone. Comments in the linked e-mail transmission and any attachments are part of a larger body of investment analysis. For our research reports, which contain information that may be used to support investment decisions, and disclosures, see our website at www.bernsteinresearch.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 - The information contained in the linked e-mail transmission and any attachments may be privileged and confidential and is intended only for the use of the person(s) named in the linked e-mail transmission. If you are not the intended recipient, or an employee or agent responsible for delivering this message to the intended recipient, you should not review, disseminate, distribute or duplicate this e-mail transmission or any attachments . If you are not the intended recipient, please contact the sender immediately by reply e-mail and destroy all copies of the original message. We do not accept account orders
Re: [rules-users] EDT dependency -- transitive dependencies broken from 4.07 to 5?
Hi Andrew, I've seen this in 4.0.7 as well. There is a dependency from drools-compiler to either Eclipse JDT or Janino for compilation, depending on what compiler you choose. JDT is default by now. Both compilers are supplied with 5M2 bin-dist, see lib/janino.jar and lib/core-3.4.2.jar for JDT. Make sure to include the JDT jar in your build and you should be fine. What's strange is that you see this using maven, as this is an explicit dependency in the drools-compiler pom. Ehm, maybe I can't really help here. :-( Cheers, Ingomar Am 31.10.2008 um 19:18 schrieb Andrew Waterman: Hi Everyone, I've seen this issue in the archives, but I haven't seen anyone address it in regards to an upgrade from 4.07 to 5MR2. Basically, I have a set of java dialect drl files that compile properly in 4.07 and are usable, but when I simply modify my maven build to use the 5MR2 release, I get the following well-known error: Caused by: java.lang.RuntimeException: The Eclipse JDT Core jar is not in the classpath at org .drools .rule .builder .dialect .java .JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java: 94) at org .drools .rule .builder .dialect .java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:55) at org .drools .compiler .PackageBuilderConfiguration .addDialect(PackageBuilderConfiguration.java:200) ... 30 more This error seemed to go away when I moved from using my local build of Drools to using the staged builds on snapshots.jboss.org, but has come back to haunt me this morning. Have the transitive dependencies changed in 5? Are there any Maven specific work-around suggestions? Is this the expected behavior for 5? best wishes, Andrew - Andrew Waterman San Cristóbal de las Casas, Chiapas, Mexico +52 1 967 103 3176 +1 510 342 5693 ___ 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] For lead Distribution
yes Am 04.11.2008 um 17:51 schrieb Pramod Koshy: Can we use Drools for a CRM tool to implment the business rules for lead assignment. Say Lead 1 has to be distributed to User 1 if Lead is from State Florida. thanks, -- View this message in context: http://www.nabble.com/For-lead-Distribution-tp20323797p20323797.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] foreach in drl file
Phil,
maybe you can tell us what you are trying to do? Are you talking about
the RHS?
--Ingomar
Am 16.02.2009 um 23:15 schrieb can_...@gmx.de:
Hello,
I would like to itterate over a list in a drl template file, I
looked at http://mvel.codehaus.org/MVEL+2.0+Orb+Tags
@foreach{item : products}
- @{item.serialNumber}
@end{}
but I just can't get the syntax right. Could someone please post an
example drl file with a foreach.
Thank you very much.
Phil
--
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Re: [rules-users] foreach in drl file
Phl,
I am still not quite there.
, I would like a foreach which itterates through a list in my java
class, e.g. Golfer, and addes the conditions in the collection to my
rule with ANDs
So the condition is where?
What I would be looking for is a plain text description of the rule, ie.
find all serial numbers of all Golfer objects that have ... Or
something like that.
Prose is usually a fairly good starting point for transcribing into
rules/drl.
Afaik foreach loop / iterations is not supported in the LHS per
se. They are also not needed as the pattern matcher will just do the
right thing.
The same result can be achieved in a 'proper' declarative way,
(whatever that means ;-) ). Therefore the question about the what.
--I
Am 16.02.2009 um 23:58 schrieb can_...@gmx.de:
Hello,
maybe you can tell us what you are trying to do? Are you talking
about
the RHS?
--Ingomar
thank you for your reply. I would like to use a template drl file
together with a java class. Both the LHS and RHS should contain
variables, where the LHS should itterate over a collection in the
when part.
So for example, in the golf example, I would like a foreach which
itterates through a list in my java class, e.g. Golfer, and addes
the conditions in the collection to my rule with ANDs.
rule find solution
when
// cut
Golfer(
@foreach{item : products}
- @{item.serialNumber}
@end{}
)
then
// do something
end
My problem is that I don't really know how to write the foreach
syntax.
Hope this is clear.
Thank you.
Phil
Am 16.02.2009 um 23:15 schrieb can_...@gmx.de:
Hello,
I would like to itterate over a list in a drl template file, I
looked at http://mvel.codehaus.org/MVEL+2.0+Orb+Tags
@foreach{item : products}
- @{item.serialNumber}
@end{}
but I just can't get the syntax right. Could someone please post an
example drl file with a foreach.
Thank you very much.
Phil
--
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Re: [rules-users] foreach in drl file
How about when Time(value==10) //it's 10 o'clock $aFriend: Friend() //any friend in the working memory then //RHS will be fired for each friend if it's 10 o'clock end or: when Time(value==10) //is it 10? $self:Self() //get a handle to yourself $friend: Friend( name in Mike, Tom, Anna ) from $self.friends //match your friends named Mike, Tom or Anna. then .. //will be fired for each of your friends that are called either Mike, Tom or Anna end Depending on the actual problem there are a lot of ways of doing this. If you provide a 'less artificial' example we may be able to help ;-) Please study Drools Manual (4.07) chapter 6.5.2, it has nice tiny examples. Cheers, Ingomar Am 17.02.2009 um 00:40 schrieb can_...@gmx.de: Thanks for the reply Ingomar. I am still not quite there. , I would like a foreach which itterates through a list in my java class, e.g. Golfer, and addes the conditions in the collection to my rule with ANDs So the condition is where? What I would be looking for is a plain text description of the rule, ie. find all serial numbers of all Golfer objects that have ... Or something like that. Prose is usually a fairly good starting point for transcribing into rules/drl. I will try, hopefully it is a bit clearer this time. friends = ['Mike', 'Tom', 'Anna'] // this is the collection I want to itterate over time = 10 When my 'friend' is one of 'friends' and time is 10 o'clock then ring my alarm. Hope this shows where I would like the collection to get into play. Thank you, Phil -- Jetzt 1 Monat kostenlos! GMX FreeDSL - Telefonanschluss + DSL für nur 17,95 Euro/mtl.!* http://dsl.gmx.de/? ac=OM.AD.PD003K11308T4569a ___ 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] Large Rule base failing? StackOverlowError
Blair. can you post the stack trace? Also, does the probem go away IF you increase stack size? --I Am 20.02.2009 um 17:54 schrieb Christie, Blair: We are having a problem reading in large serialized files. We get a StackOverflow exception when the rules get to be 2m. Is there a way to overcome this without increasing the stack size? Blair Christie ___ 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] FW: When is 5.0 GA?
If you are not the intended recipient, you have received this transmission in error and you are hereby advised that any review, disclosure, copying, distribution, or use of this transmission, or any of the information included therein, is unauthorized and strictly prohibited. Maybe off-topic but I am wondering: Am I the intended reciepient? ;-) --I Am 11.03.2009 um 13:39 schrieb Umesh Wankhede: From: Umesh Wankhede [mailto:umesh.wankh...@arisglobal.co.in] Sent: Tuesday, March 10, 2009 5:35 PM To: 'rules-users@lists.jboss.org' Subject: When is 5.0 GA? Hi When is the plan for GA of Drools 5.0? Umesh Legal Notice: This transmission, including any attachments, is confidential, proprietary, and may be privileged. It is intended solely for the intended recipient. If you are not the intended recipient, you have received this transmission in error and you are hereby advised that any review, disclosure, copying, distribution, or use of this transmission, or any of the information included therein, is unauthorized and strictly prohibited. If you have received this transmission in error, please immediately notify the sender by reply and permanently delete all copies of this transmission and its attachments ___ 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] Drools 4.0.7 Or 5.0.X ?
Our project is going into production after 1 year so please let me know is it good idea to implement 4.0.7 or 5.0.X ? I think it's safe to assume that 5.x will be rock solid a year from now so I would suggest 5 as migration from 4.0.x to 5.x is not free. --I Am 12.03.2009 um 14:53 schrieb surya_n2007: Hi All, We want to implement drools as our rule engine , planning to use drools 4.0.7 since i am thinking drools 5.0 has bugs and fixes is going on . Our application has huge volume of facts performance is main criteria,planning to use RuleFlow and it is standalone application not using BRMS this is one reason to select 4.0.7 . Our project is going into production after 1 year so please let me know is it good idea to implement 4.0.7 or 5.0.X ? Thanks Regards Surya. -- View this message in context: http://www.nabble.com/Drools-4.0.7-Or-5.0.X---tp22476826p22476826.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
[rules-users] Null safe MVEL expressions
Folks, it seems that since 2.0 MVEL supports null-safe MVEL expressions, ie. fact.?property.subproperty == foo will evaluate to false (instead of failing) if property is null. I tried this some time ago and it seems that the drools parser does not like the ?. Is anybody using this? Cheers, Ingomar ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Hints for profiling pattern-matching
Folks, I am currently tuning a Drools application. We have made good progress with basic rule tuning (pattern reordering), however I am under the impression that there is still some inefficient matching going on. I am wondering whether there are hooks in Drools (or an approach) to get a handle on where expensive matching is performed. A regular profiler is not helpful, as I can't see the data (what is being matched). Any ideas? Cheers, Ingomar ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] org.drools.runtime.rule.ConsequenceException: [Error: unable to access property (null parent): add] [Near : {... Unknown ....}] ^ [Line: 1, Column: 0]
Ashish,
My guess is that you are navigating properties and the something along
the way is null.
Eg object.prop1.prop2 where prop1 is null. If prop1 can be null you
have to check for nullness first, ie.
object.prop1!=null, object.prop1.prop2
--Ingomar
Am 01.04.2009 um 19:23 schrieb Ashish Soni:
Hi ,
Can some-one please tell What does this error means.
org.drools.runtime.rule.ConsequenceException: [Error: unable to access
property (null parent): add] [Near : {...
Unknown }] ^
[Line: 1, Column: 0]
Regards,
Ashish
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Re: [rules-users] Performance of compiler
Christian, with our app, we see a compile performance which is at least an order of magnitude higher. I would assume that in your case the extreme fine granularity of your DRLs may be slowing things down. Have you tried to consolidate these in bigger but fewer DRls? If you need that granualarity, you still have the option of joining these together before running it with the help of perl and the likes. --I ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Re: Guvnor stuck when opening web based decision table - any hints?
Well maybe it is lost and I just re-create it. However the archive button is only visible when I open the asset. :-( Solution: Mount Guvnor via WebDav and fix it there. :-) --I Am 24.04.2009 um 11:17 schrieb Ingomar Otter: When opening a web-based decision table my 5.0.0CR1 guvnor gets stuck at Loading Asset There is no error in the logfile. That specific server/browser combination used to work until I did 'some' change to the table. ;-) Any idea how I can track this down? Cheers, Ingomar -- Ingomar Otter CTO mailto:ingomar.ot...@valtech.de Mobile: +49 172 2367867 Valtech GmbH Bahnstraße 16 40212 Düsseldorf Germany Phone: +49 211 179237-0 Fax: +49 211 179237-19 http://www.valtech.de Geschäftsführer: Ingo Kriescher Amtsgericht Düsseldorf HRB48672 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Does drools have any trigger?
Lindy, by default Drools will re-evaluate the rules as needed once facts are changed (and the engine is told about it), so when changed is actually the default behavior. The examples you give sound more like an event-processing scenario (reasoning over time) so you might want to have a look at drools-fusion. Rules can be updated by business users thru BRMS and Guvnor? The short answer yes. The long answer: Your milage may vary. It really depends on what type of rules and what type of business users. I don't think it's safe to just tick this box. That has not much to do with Guvnor's capabilities (allthough it is a new product) - I rather think that this is not true for any BRMS. -- Ingomar Am 24.04.2009 um 18:30 schrieb Lindy hagan: I was looking at Blaze Advisor documentation it has “when changed” operator that only fires when an attribute of an object changes. A business analyst might use it to watch for any important issue, such as a thermostat warning in a process plant or a particular stock reaching a certain price or volume. In similar way does Drools have this feature? Can any one correct if I am wrong: Rules can be updated by business users thru BRMS and Guvnor? (I did not get chance to go thru these) ___ 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] Rules-users list delays/duplicates
It seems that the rules-users list is experiencing either massive delays or duplicate delivery. See message below which reached me today. Should you experience the same effect, I have indicated this to rules-users-owner so it is known Cheers, Ingomar Von: David Boaz dav...@dbmotion.com Datum: 17. August 2008 17:22:00 MESZ An: rules-users@lists.jboss.org Betreff: [rules-users] CEP functionality Antwort an: Rules Users List rules-users@lists.jboss.org Dear all, We posted this question two weeks ago, but with no replies. please forgive me for posting it again. In our business, most of the facts have time-stamp attributes. For example, each laboratory test (a fact) has the time stamp when the sample was taken, and when the machine produced the result value. In our business- logic, we often analyze the relation between facts using these attributes. For example: 1) finding two adjacent labResults with an increasing value 2) checking whether 3 facts are consecutive 3) counting the number of facts fulfilling a specific constraint within a specific time window. We were happy to read (in the blog) about the new CEP feature which is about to be added to drools 5.0. * Where can we find a more detailed description of CEP functionality in drools? * Is it a good idea to use CEP for analyzing historic data (retrieved from the database)? or is it best for online data. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] Sharing packages between rule bases?
Hello @all. We are generating quite some rules and we have handcrafted rules. We'd like to combine both into RuleBases that we use for a limited time. So far we have parsed the static packages and merged these into RuleBases we create. We hang on to the static packages to avoid unnnecessary parsing of these. This results in a n:m relation between packages and rulebases. For example: * Rulebase1 contains Package:Pstatic and Package:P1 * Rulebase2 contains Package:Pstatic and Package:P2 etc.. Is this supported/permitted? Any idea how I can achieve shared packages between rule bases? * What we see is a memory leak,. It seems that the generated Rulebases (and their classes ) are never unloaded. We are still investigating. * I included a specific code to remove the packages from the rulebases, once we no longer need them. I use RuleBase.removePackage for this. To my surprise the removePackage method not only removes the package from the RuleBase, it also purges the package. :-( So I do a myRuleBase.addPackage(myLovelyPackge) followed by myRuleBase.removePackage(myLovelyPackage.getName()). This leaves myLovelyPackge _empty_. Not what I expected. -- Ingomar (ps all this is on 407) ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Download Drools 4.0.7
Shenika, It's always here: http://anonsvn.jboss.org/repos/labs/labs/jbossrules/tags/4.0.7.19894.GA/ Check it out and buikd it (it's trivial). If you get's nervous because of this, you might want to consider to move from the community to the RedHat supported version. ;-) --I Am 20.05.2009 um 19:18 schrieb Shenika Harris: Is it still possible to download 4.0.7? We are in the process of getting approval to implement 4.0.7 in our one of our applications. While 5.x is very appealing, it would be a significant delay in the project to get approval for 5 at this time. The links for 4.0.7 are ‘gone’ and making people very nervous. Please let me know if you have the url to download 4.0.7… I suspect it’s something like http://download.jboss.org/drools/release/4.0.7 etc. Thank you! - Shenika ___ 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] fact granularity, performance, and other questions
David,
- Does the order of the conditions in a rule affect performance, the
execution order, or the structure of the Rete network?
Yes, quite a lot has been written about this. The drools documentation
has a few paragraphs with good heuristics...
A popular read seems to be this paper, which provides good insight
into RETE performance aspects:
Production Matching for Large Learning Systems (Rete/UL)
by Robert B. Doorenbos
PhD thesis, Carnegie Mellon University, January 31, 1995
- Does the order the facts are inserted into a stateless session (as
a list via the CommandFactory.newInsertElements) affect performance
at
all?
All I can say that this is true (it has impact) for statefull
sessions. The deal here is how often the agenda may get changed while
inserting objects.
I have no experience with stateless sessions and I hope others do;-)
- Should each field in a message be a fact? (more info on my message
below) What fact granularity have you settled on in your usage and
why?
I would suggest to start with a model which is most natural to your
rules (with the lowest WTF factor) and take it from there.
I assume that you need to correlate information from all segments of a
message?
I would stay well clear from your option 3 (eval()) - just because I
always do ;-)
Eval() simply defies RETE optimizations so it can be very sensitive to
both number of facts and number of rules (using eval).
If you know the field IDs (which I assume you would, using an EDI
formant) - I would see whether you can avoid the field facts and turn
them into slots (attributes) instead.
But not to the extend you outline in #2, that seems to be too awkward.
If you have buy another server ;-)
what did you determine the best approach to be?
I am pretty sure that there is no generic best approach.
I would proceed trying to understand the nature of the rules (are they
regular, ie following the same scheme, can they be generated?) and the
data and create
regression performance test-suite ASAP to monitor performance during
development.
In our application we for example have analyzed bottlenecks and found
that (no surprise) accessing properties like facta.factb.value is
slower compared to facta.facbtValue - that's in 4.07 - due to the
different mechanism the value is obtained. From there we have added
about three of these shortcut accessors. However we have first
focused on optimizing the rules themself to avoid excessive matching
in the first place so there was no need for us to flatten our entire
model.
my 0.02EUR
-- Ingomar
Am 28.05.2009 um 02:17 schrieb David Zeigler:
Hi,
I could use some experienced guidance. I'm in the process of
evaluating Drools for use of using in a real-time transactional
environment to process about 3000 messages/second. I realize a lot of
this depends on the type and quantity of rules, hardware, etc. I'm
curious what steps others have taken to improve performance and if
there are any recommendations for my case detailed below.
A few specific questions I have are:
- Should each field in a message be a fact? (more info on my message
below) What fact granularity have you settled on in your usage and
why?
- Does the order of the conditions in a rule affect performance, the
execution order, or the structure of the Rete network?
- Does the order the facts are inserted into a stateless session (as
a list via the CommandFactory.newInsertElements) affect performance at
all?
The message is an EDI format and will typically have anywhere from 80
to 200 fields, potentially more. The message is divided into
transactions, then segments, then fields. We have an object model
that represents the message. We're using a stateless session and most
of the rules will modify fields or add fields and segments based on
the values of other fields. Currently, I flatten the object model
into a List containing the message, transactions, segments, and each
field, and then insert the list into the stateless session and fire.
I'm avoiding sequential mode for now until we have a better idea of
our requirements.
Here's a simplified example of what I'm doing now (using json-esque
syntax instead of the EDI format).
message {
segment {
SG:header
A0:agents
}
segment {
SG:agent
A1:000
A2:JAMES
A3:BOND
}
segment {
SG:agent
A1:86
A2:MAXWELL
A3:SMART
}
}
Each field has an id and a value. For this message, I would insert 14
facts: the message object, 3 segments objects, and 10 field objects.
rule set James Bond's A1 to 007
when
$a1 : Field(id == A1, value != 007)
Field(id == A2, value == JAMES)
Field(id == A3, value == BOND)
then
$a1.setValue(007);
update($a1);
end
A relatively more complicated, but typical rule would be set James
Bond's A1 to 007 iff he's the second agent in the message and one of
the other agents' first names does not contain AUSTIN and an agency
segment exists
The above example assumes each segment and field is
Re: [rules-users] Is Drools suitable for this scenario?
Alex, sounds like a feasible use of Drools to me. Do you have details on number of facts, rules and/or typical rules? The time you give (5msec) is ambitious but I think is feasible if done right. This means that I do not see a reason why this can not be achieved with Drools - in principle. Whether it will take 5msec per ?? or 5 seconds now depends on details of your problem (and skill). ;-) -- Ingomar Am 28.05.2009 um 16:50 schrieb Zevenbergen, Alex: Hi all, I am wondering if Drools is suitable for a task I have to achieve. I have an application that assigns values to objects - in some circumstances an object's value may have to be mapped onto another object. The circumstances that this might happen in don't have many common characteristics so I have cant really put this logic into a db. So my question is whether Drools is the better option to put this logic into? Also this app relies on speed and is Drools fast enough to facilitate this? (= .005 sec preferably) Thanks, Alex Privileged, confidential and/or copyright information may be contained in this communication. This e-mail and any files transmitted with it are confidential and intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended addressee, you may not copy, forward, disclose or otherwise use this e-mail or any part of it in any way whatsoever. To do so is prohibited and may be unlawful. If you have received this email in error please notify the sender immediately. Paddy Power PLC may monitor the content of e-mail sent and received for the purpose of ensuring compliance with its policies and procedures. Paddy Power plc, Airton House, Airton Road, Tallaght, Dublin 24 Registered in Ireland: 16956 ___ 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] Upgrade to Drools 5 - loss of performance
During a few experiments I did with MVEL, I have found that 2.x actually performs slower than 1.x in our case. Maybe that is a starting point. Scott, do you have the possibility to profile your application using 4.x and using 5.x? That should reveal the bottlenecks and I am sure that the dev crowd would be glad receiving that input. -- Ingomar Am 28.05.2009 um 17:18 schrieb Scott Reed: I just upgraded our app from Drools 4 to 5 libraries. We just use the rules engine with DRL. The performance of the engine on our rulebase is unacceptably slow. I assume there is something we need to do to our rules or the way we are configuring the engine to fix this. I don't see anything in the release notes about backwards compatibility issues. I would very much appreciate it if someone would direct me to any documentation that explains what needs to be done so our 4.0 rules perform at least as well as they did before the upgrade? Thanks, Scott ___ 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] A relational SQL Database as RuleBase
Rene, mhhm, what are your trying to do (besides storing rules in a rdbms)? What's the use-case? Cheers, --I Am 03.06.2009 um 22:21 schrieb r.r.neum...@freenet.de: Hi guys, my question is listed in the topic. Is it possible? I read, that Drools 4 provides such a feature but in this case, there is noch DSL available? Is this correct? What's about Drools 5, same thing? Thanks for an answer! Regards René -- View this message in context: http://www.nabble.com/A-relational-SQL-Database-as-RuleBase-tp2383p2383.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] A relational SQL Database as RuleBase
To me it appears to be a very generic question that's hard to answer without serious mind-reading skills. Am 04.06.2009 um 09:31 schrieb r.r.neum...@freenet.de: It's just a question still now :) ... -- View this message in context: http://www.nabble.com/A-relational-SQL-Database-as-RuleBase-tp2383p23865137.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] Default rule
How about if you create a rule with lowest salience, this will fire _after_ all other rules have fired. Would this help? Am 04.06.2009 um 22:17 schrieb Malenfant, Andre: Anyone knows if it is possible to have a `default` rule that would fire only if others have not? Also, is there a way, using decision tables in XLS, to look if the value of a field is contained in a list elsewhere in the XLS? Thanks André ___ 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] Templates / Generated rules debugging
- Since this is a web application, I cannot debug the rules in Eclipse (unless I am missing something) You are missing something. :-) That's possible. However we have found regular debuggers not to helpful. Have a look at the WorkingMemoryLoggers, they can give you a detailed insight of what's going on inside Drools, ie. * Facts inserted, changed, retracted * Activations * Rules fired 4.0.7: http://downloads.jboss.com/drools/docs/4.0.7.19894.GA/apidocs/org/drools/audit/WorkingMemoryFileLogger.html (The Drools Eclipse Plugin can be used to view these logs). To be useful, this requires a usable toString, we have created those using apache commmons-lang. Happy hunting! -- Ingomar Am 08.06.2009 um 17:46 schrieb Malenfant, Andre: Hi, Can some of your share your technique for debugging/troubleshooting rules: Here is the situation: - I have a web application that uses rules at specific points. - I use templates and decision tables so the actual rules are compiled by my application using a spread sheet compiler. - Since this is a web application, I cannot debug the rules in Eclipse (unless I am missing something) I must not be the only one asking this question but I cannot find answers in the archives. Thanks, André Malenfant ___ 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] Templates / Generated rules debugging
Yes, check this out: http://blog.athico.com/2008/02/looking-under-drools-skirt.html Am 08.06.2009 um 18:34 schrieb Malenfant, Andre: Is it possible to see the generated Java code for the rules? -Original Message- From: rules-users-boun...@lists.jboss.org [mailto:rules-users-boun...@lists.jboss.org ] On Behalf Of Ingomar Otter Sent: Monday, June 08, 2009 12:00 PM To: Rules Users List Subject: Re: [rules-users] Templates / Generated rules debugging - Since this is a web application, I cannot debug the rules in Eclipse (unless I am missing something) You are missing something. :-) That's possible. However we have found regular debuggers not to helpful. Have a look at the WorkingMemoryLoggers, they can give you a detailed insight of what's going on inside Drools, ie. * Facts inserted, changed, retracted * Activations * Rules fired 4.0.7: http://downloads.jboss.com/drools/docs/4.0.7.19894.GA/apidocs/org/drools/audit/WorkingMemoryFileLogger.html (The Drools Eclipse Plugin can be used to view these logs). To be useful, this requires a usable toString, we have created those using apache commmons-lang. Happy hunting! -- Ingomar Am 08.06.2009 um 17:46 schrieb Malenfant, Andre: Hi, Can some of your share your technique for debugging/troubleshooting rules: Here is the situation: - I have a web application that uses rules at specific points. - I use templates and decision tables so the actual rules are compiled by my application using a spread sheet compiler. - Since this is a web application, I cannot debug the rules in Eclipse (unless I am missing something) I must not be the only one asking this question but I cannot find answers in the archives. Thanks, André Malenfant ___ 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 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
