Re: [rules-users] Problem sharing declarative model between two packages
I'll do that. Thanks for the help! -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020641.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Problem sharing declarative model between two packages
Thanks for the suggestion. I actually used a Guvnor Declarative Model originally, but I described the example using DRL because that seemed easier to communicate. At this point, I've tried both approaches with no success. I will put together a repository export and create a new issue in JIRA. -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020640.html Sent from the Drools: User forum 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 5.5.0.CR1 is using a broken cdi-api version
Hello, I'm using Tycho to create a dependency P2 repository (OSGi environment) containing JBPM 5.4.0.CR1 and DROOLS 5.5.0.CR1. I got some problem to properly setup the dependencies for the cdi-api. The bundle knowledge-internal-api has a dependency to cdi-api (version 1.0-SP4), but this version is tied to this: org.jboss.spec.javax.interceptor jboss-interceptors-api_1.1_spec 1.0.0.Beta1 And this 1.0.0.Beta1 version of org.jboss.spec.javax.interceptor was not well osgified. it doesn't have a Bundle-SymbolicName ! I could handle this problem using a newer version of it: org.jboss.spec.javax.interceptor jboss-interceptors-api_1.1_spec 1.0.1.Final I won't use cdi anyway, but it could help others that decide to use jbpm with eclipse. regards, Cristiano ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Problem sharing declarative model between two packages
You could try using Guvnor Declarative Models rather than importing DRL. Otherwise, it is a bug\feature request (I'm not sure we have any code in place at present to support this). Please raise a JIRA. On 31 October 2012 22:18, Al wrote: > There were no imports for MyType in the Guvnor package configuration for p1 > or p2. > > I tried adding an import of p2.MyType in the p1 package configuration. > When > I built the package, Guvnor generated an error: Error importing : > 'p2.MyType'. > > I also tried adding an import for p1.MyType in the p2 package > configuration, > with similar results. > > Is there some other way I should be configuring the imports? > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020637.html > Sent from the Drools: User forum 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] Problem sharing declarative model between two packages
There were no imports for MyType in the Guvnor package configuration for p1 or p2. I tried adding an import of p2.MyType in the p1 package configuration. When I built the package, Guvnor generated an error: Error importing : 'p2.MyType'. I also tried adding an import for p1.MyType in the p2 package configuration, with similar results. Is there some other way I should be configuring the imports? -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020637.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Problem sharing declarative model between two packages
Please open a GUVNOR Jira as Michael suggested.. putting the declaration in the two packages would lead to two different classes, p1.MyEvent and p2.MyEvent The Guvnor team will then double-check Thanks Davide -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020636.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Problem sharing declarative model between two packages
If I create three DRL files as you described and then import them into Guvnor, it creates three separate Guvnor packages (datamodel, p1, p2). If I want to reference MyEvent from the rule in p1, I need to import datamodel.MyEvent. Unfortunately, Guvnor doesn't allow me to import declared types from a different Guvnor package. So, unless I'm misunderstanding your suggestion, I would end up having to copy the declarative model for datamodel.MyEvent into the p1 and p2 packages and I would be back in my original predicament. -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020635.html Sent from the Drools: User forum 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] How to retrieving LHS or RHS from the rule.
Guys, Is there anyway we can list out of LHS and RHS from the rule? I know we can get rulename and all metaattributes of a rules from its knowledgebase but didn't see anyway to get LHS and RHS. Thanks in Advance. -- View this message in context: http://drools.46999.n3.nabble.com/How-to-retrieving-LHS-or-RHS-from-the-rule-tp4020634.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Problem sharing declarative model between two packages
It could be the imports - I'd definitely recommend setting them on the package configuration in Guvnor. However it's possibly (more likely) a bug in Guvnor as the "Global Area" doesn't "have" a package and hence I suspect there are no imports to specify. Please try and report back - if it still fails I suggest raising a JIRA (for GUVNOR, https://issues.jboss.org/browse/GUVNOR) and attach a repository demonstrating the issue. With kind regards, Mike On 31 October 2012 20:42, Davide Sottara wrote: > Oh right, I should have read more carefully :) > Drools is package-oriented, so in technical DRL you should do: > > -- > package datamodel; > > declare MyEvent > end > > -- > > package p1; > import datamodel.MyEvent > rule r1 when MyEvent() then .. end > > -- > > package p1; > import datamodel.MyEvent > rule r2 when MyEvent() then .. end > > > Someone from the guvnor team might clarify whether imports need to be > implicit or explicit :) > > Best > Davide > > p.s. if no package is specified, Drools assumes "defaultpkg" as package > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020632.html > Sent from the Drools: User forum 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] Problem sharing declarative model between two packages
Oh right, I should have read more carefully :) Drools is package-oriented, so in technical DRL you should do: -- package datamodel; declare MyEvent end -- package p1; import datamodel.MyEvent rule r1 when MyEvent() then .. end -- package p1; import datamodel.MyEvent rule r2 when MyEvent() then .. end Someone from the guvnor team might clarify whether imports need to be implicit or explicit :) Best Davide p.s. if no package is specified, Drools assumes "defaultpkg" as package -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020632.html Sent from the Drools: User forum 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] Rule Template doesn't show up in Test Scenario
Hi, I am using Drools 5.4.0 Guvnor. I created a Rule Template and I would to test it with a Test Scenario. However, when I try to show the rules to fire in the test, the newly created (and saved) Rule Template doesn't show up in the rule list. Newly created "ordinary" rules show up properly in the list, but not a Rule Template. Has anyone tried this and got it to work? Ken -- View this message in context: http://drools.46999.n3.nabble.com/Rule-Template-doesn-t-show-up-in-Test-Scenario-tp4020631.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Problem sharing declarative model between two packages
Thanks for the quick reply, Davide! It does look somewhat similar, but I am using a single KnowledgeBase, there are no Exceptions being thrown, and I don't think there is anything I can do with sharing ClassLoaders to workaround the problem. I am loading both packages into my KnowledgeBase, creating a Session and executing the rules. The only problem I have is that the declared type, MyType, is created as an instance of p1.MyType, and the "find it" rule in package p2 seems to be looking for an instance of p2.MyType. I suppose this is how things are supposed to work, but I was hoping someone could suggest a different way to share a declarative model across packages that wouldn't suffer this problem. -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020630.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Problem sharing declarative model between two packages
Might your issue be related to this discussion? https://issues.jboss.org/browse/JBRULES-3669 -- View this message in context: http://drools.46999.n3.nabble.com/Problem-sharing-declarative-model-between-two-packages-tp4020628p4020629.html Sent from the Drools: User forum 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] Problem sharing declarative model between two packages
I would like to be able to share a declarative model between two packages.
When I attempt to do this by creating my model in Guvnor's Global Area and
then importing it into each package, I find that instances of the declared
types that are created by rules in one package are not recognized by rules
in the other package.
For example, suppose I create a model in the global area with a declared
type:
declare MyType
field1: String
end
I then import this model into packages "p1" and "p2". I add the following
rule into package "p1":
rule "create it"
when
eval(true)
then
MyType m = new MyType();
insert(m);
end
and I add the following rule into package "p2":
rule "find it"
when
$m : MyType()
then
System.out.println("found it");
end
At runtime, the "create it" rule fires and inserts a "MyType" object.
However, the "find it" rule never fires.
If I add a WorkingMemoryEventListener and look at exactly what is being
inserted, I can see that the "create it" rule is inserting an instance of
p1.MyType. I assume that the "find it" rule is looking for an instance of
p2.MyType and that is why it never fires.
Is there a different way to accomplish this? Or, are declarative models
simply not intended to be shared across packages?
--
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Re: [rules-users] Noob desperately needing help
Mattias (and Esteban)... Well.you guys gave me the solution to the problem, but in a wildly indirect way. I downloaded the source for zip4j, added a bunch of logging so I could figure out where the code was hanging, went to replace the existing library and.hmmm, where the heck IS the existing library? Long story short, was not including the zip4j.jar in the app classpath. Added the debug version, and, surprise, surprise, it worked. So, it turns out I should have been getting a ClassNotFound exception from the classloader. Not sure why drools would just stop and NOT throw a ClassNotFound exception, but that is no longer my concern. Thanks to everyone who participated in leading me to a solution...a typical false-positive error. And to Davideyou were right, not a Drools problem at all. It was the nut behind the keyboard (aka PEBKAC). Paul -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020627.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
I was just about to suggest something similar. Use JDB or some other utility to get a thread dump from the JVM when it is hung. That should let you know exactly in what class and method the thread hangs. You could also change your code to catch (and rethrow) Throwable instead of Exception to double-check that the call to ZipOutputStream is not throwing an Error that is secretly caught somewhere without being logged. Regards, Mattias - Original Message - From: "Esteban Aliverti" To: "Rules Users List" Sent: Wednesday, 31 October, 2012 4:46:53 PM Subject: Re: [rules-users] Noob desperately needing help Did you try to debug your code to see exactly where the hung is? zip4j seems to be open source, you could even debug its internals to see where the problem is and maybe you can get a clue of what is going wrong. Best Regards, Esteban Aliverti - Blog @ http://ilesteban.wordpress.com On Wed, Oct 31, 2012 at 4:26 PM, zaphod < pcoo...@emspic.org > wrote: Wolfgang, Here's my dilemma...there is no exception thrown! I wouldn't even be here asking the question if I was getting an OOME...my problem is that the rule hangs, and from that point on, the entire rules engine is hung, even though other processing continues on that jboss node. Note that I'm using zip4j, as the default zip library provided in Java does not support password-protecting the zip file. That is a requirement of this process. And this is new code...it works perfectly outside the rules container, but not at all inside it. What baffles me is the process hanging...I've been writing Java code for 13 years, and I've never seen a process just hang... Paul ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] java.lang.LinkageError, but only sometimes
I'm guessing now. But since the stack trace includes org.drools.rule.JavaDialectRuntimeData I would rather say it is related to Java and not to MVEL. Actually org.drools.rule.MVELDialectRuntimeData seems to have less class-loading logic than JavaDialectRuntimeData so if this is indeed a bug a workaround may be to switch from java to mvel dialect. Another workaround could be to "warm up" your rules by firing them from a single thread before exposing the knowledge base to the multi-threaded client code. Regards, Mattias - Original Message - From: "kennywest" To: rules-users@lists.jboss.org Sent: Wednesday, 31 October, 2012 4:33:07 PM Subject: Re: [rules-users] java.lang.LinkageError, but only sometimes Thank you for your reply. I have created the following issue: https://issues.jboss.org/browse/JBRULES-3675 We are now running the same setup on 5.5.0.CR1 and so far, we haven't encountered the linkage error. Could this be related to mvel? -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-LinkageError-but-only-sometimes-tp4020606p4020616.html Sent from the Drools: User forum 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] java.lang.LinkageError, but only sometimes
Cried wolf too soon :( Linkage error also occurs in 5.5.0.CR1 -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-LinkageError-but-only-sometimes-tp4020606p4020618.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] java.lang.LinkageError, but only sometimes
Thank you for your reply. I have created the following issue: https://issues.jboss.org/browse/JBRULES-3675 We are now running the same setup on 5.5.0.CR1 and so far, we haven't encountered the linkage error. Could this be related to mvel? -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-LinkageError-but-only-sometimes-tp4020606p4020616.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Noob desperately needing help
Wolfgang, Here's my dilemma...there is no exception thrown! I wouldn't even be here asking the question if I was getting an OOME...my problem is that the rule hangs, and from that point on, the entire rules engine is hung, even though other processing continues on that jboss node. Note that I'm using zip4j, as the default zip library provided in Java does not support password-protecting the zip file. That is a requirement of this process. And this is new code...it works perfectly outside the rules container, but not at all inside it. What baffles me is the process hanging...I've been writing Java code for 13 years, and I've never seen a process just hang... Paul -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020615.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Calling queries or collect() from functions
Yes, you can create a query and call it in a function, as you'd call
it in Java - see the Expert documentation.
Alternatively, consider using an insertLogical as in your Rule1,
putting the list into a simple wrapper class declared in DRL.
Or simply use "extends Rule1" in all the rules needing the collected
list, omitting the insert from Rule1.
I think you can omit the first pattern from Rule1.
-W
On 31/10/2012, Miguel Paraz wrote:
> Hi,
> I have a rule like:
>
> rule "Rule1"
> when
> $fact: Fact1()
> $allFacts: ArrayList() from collect(Fact1())
>
> then
> insert(new Fact2($allFacts.size()));
> end
>
>
> I want to compute $allFacts inside a function since I will use it across
> different rules.
> This doesn't work because it is not valid Java syntax:
>
> function int size() {
> ArrayList a = ArrayList() from collect(InQueuePredicate());
> return a.size();
> }
>
> Could I put this in a named query, and call it from a function?
>
> Thanks!
> Miguel
>
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[rules-users] Calling queries or collect() from functions
Hi,
I have a rule like:
rule "Rule1"
when
$fact: Fact1()
$allFacts: ArrayList() from collect(Fact1())
then
insert(new Fact2($allFacts.size()));
end
I want to compute $allFacts inside a function since I will use it across
different rules.
This doesn't work because it is not valid Java syntax:
function int size() {
ArrayList a = ArrayList() from collect(InQueuePredicate());
return a.size();
}
Could I put this in a named query, and call it from a function?
Thanks!
Miguel
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Re: [rules-users] enquiry on drools webservice
You might like to try Jboss SwitchYard. This has functionality to create Rules Services, based on Drools. https://docs.jboss.org/author/display/SWITCHYARD/User+Guide#UserGuide-RulesServices -- View this message in context: http://drools.46999.n3.nabble.com/enquiry-on-drools-webservice-tp56673p4020612.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] java.lang.LinkageError, but only sometimes
Hi Kenneth, I have never experienced this myself, but after having a quick look at the code I believe this could be a multi-threading problem. In the abstract class java.lang.ClassLoader the method loadClass(String, boolean) is synchronized, but both org.drools.util.CompositeClassLoader and org.drools.rule.JavaDialectRuntimeData$PackageClassLoader override this method without the use of "synchronized". I would suggest you create a JIRA issue for this. Regards, Mattias - Ursprungligt meddelande - Från: "kennywest" Till: rules-users@lists.jboss.org Skickat: onsdag, 31 okt 2012 12:41:29 Ämne: [rules-users] java.lang.LinkageError, but only sometimes Dear list, We have an application (A) deployed on JBoss 7.1.1 accepting commands (CQRS, but only C and Q :) ). A console application (B) is sending a large volume of commands to create entities in A. Entities in A are validated by Drools (plain drl files, configured in spring using drools-spring). Most of the time this works just fine. But sometimes, we get the following exception: java.lang.LinkageError: loader (instance of org/drools/rule/JavaDialectRuntimeData$PackageClassLoader): attempted duplicate class definition for name: "a/b/c/Rule_person_unique___name_656ee3db19d34e689d95e2d6b2be67b6" at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.6.0_30] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) [rt.jar:1.6.0_30] at java.lang.ClassLoader.defineClass(ClassLoader.java:615) [rt.jar:1.6.0_30] at org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615) [drools-core-5.4.0.Final.jar:5.4.0.Final] at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254) [knowledge-api-5.4.0.Final.jar:5.4.0.Final] at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237) [knowledge-api-5.4.0.Final.jar:5.4.0.Final] at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88) [knowledge-api-5.4.0.Final.jar:5.4.0.Final] at java.lang.ClassLoader.loadClass(ClassLoader.java:295) [rt.jar:1.6.0_30] at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [rt.jar:1.6.0_30] at a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0InvokerGenerated.evaluate(Unknown Source) at a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0Invoker.evaluate(Unknown Source) at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:114) [drools-core-5.4.0.Final.jar:5.4.0.Final] Any idea where this is coming from or what's causing this. We are using: - JBoss 7.1.1 - drools 5.4.0.Final - jdk 1.6u30 - Windows 7 64 bit regards, Kenneth -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-LinkageError-but-only-sometimes-tp4020606.html Sent from the Drools: User forum 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] Noob desperately needing help
I agree with Davide. Google with >java.util.zip.Deflater native method init< returns several interesting hits, some of which indicate that it is possible to run into an OOME, e.g., when heap and perm space doesn't leave enough room for native memory allocation. When this problem became manifest: was there a change of the OS or JVM version? Does the error occur after some other processing using similar procedures has been done, possibly without returning memory allocations? Insert a call new Deflater(Deflater.DEFAULT_COMPRESSION, true); and a logger call, preceding ZipOutputStream outputStream = new ZipOutputStream(baos); <--- rule hangs here to narrow it down. -W On 31/10/2012, Davide Sottara wrote: > >From your description, it does not seem a rule engine issue... Have you > tried > reproducing the problem > outside the rule engine? I.e. invoking the ZipUtil in a more "traditional" > context? > And does it get stuck with ANY bytearray or just with that one particular > input? > > > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020592.html > Sent from the Drools: User forum 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] Noob desperately needing help
Davide, Thanks for the response…I have also fired the attached code from outside a rule, and it works perfectly (I created a hidden test menu option that allows me to call runNeedleChestDecompressionReport()). In fact, every other instance of using ZipUtil works fine. And the place where the rule is hanging hasn’t actually gotten to the byte array yet…it’s creating internal data structures to handle the input. I’m grasping for straws, I know… Paul -- View this message in context: http://drools.46999.n3.nabble.com/Noob-desperately-needing-help-tp4020589p4020609.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] debug
Hi, release notes for 5.4.0.Final mention that "Breakpoints in Rule RHS are not working with Java dialect". Try adding this attribute to your rule and see if that makes debugging work: dialect "mvel" Regards, Mattias - Ursprungligt meddelande - Från: "benq2188" Till: rules-users@lists.jboss.org Skickat: onsdag, 31 okt 2012 10:58:06 Ämne: Re: [rules-users] debug Hello, I faced with the same problem. Breakpoints are not being hit by debugger. I have Eclipse SDK version: 4.2.1 and went through the reference manual of Drools and followed each step carefully. -Installed GEF - Downloaded drools-distribution-5.4.0.Final.zip -Unzipped it into Eclipse main folder -Restarted Eclipse -Defined run time based on the latest Drools project jars included in the plugin itself. -Created Drools Project -Created new launch configuration for Drools Application. -Put a breakpoint in the helloworld simple project on the first line of the section "then". When I debug it as Drools Application, debugger stops in Java breakpoints but doesn't stop in drl rule. Also tried what Bruno suggested but it did not worked too. Any other solutions, how can I fix it? Thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/debug-tp3889772p4020597.html Sent from the Drools: User forum 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] JTA Persistence, Fact Objects and High Availability
Hi, I'm looking at the possibility of using Drools to store the working state of my app, in the form of rules. Can JTA Persistence store fact objects? I read that the fact objects must be Serializable - are there other requirements or caveats? Can JTA Persistence take care of High Availability? Even if the system goes down in the middle of a rules computation? Assuming the database handling the JPA is a HA system. Thanks! Miguel ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] java.lang.LinkageError, but only sometimes
Dear list, We have an application (A) deployed on JBoss 7.1.1 accepting commands (CQRS, but only C and Q :) ). A console application (B) is sending a large volume of commands to create entities in A. Entities in A are validated by Drools (plain drl files, configured in spring using drools-spring). Most of the time this works just fine. But sometimes, we get the following exception: java.lang.LinkageError: loader (instance of org/drools/rule/JavaDialectRuntimeData$PackageClassLoader): attempted duplicate class definition for name: "a/b/c/Rule_person_unique___name_656ee3db19d34e689d95e2d6b2be67b6" at java.lang.ClassLoader.defineClass1(Native Method) [rt.jar:1.6.0_30] at java.lang.ClassLoader.defineClassCond(ClassLoader.java:631) [rt.jar:1.6.0_30] at java.lang.ClassLoader.defineClass(ClassLoader.java:615) [rt.jar:1.6.0_30] at org.drools.rule.JavaDialectRuntimeData$PackageClassLoader.fastFindClass(JavaDialectRuntimeData.java:615) [drools-core-5.4.0.Final.jar:5.4.0.Final] at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:254) [knowledge-api-5.4.0.Final.jar:5.4.0.Final] at org.drools.util.CompositeClassLoader$CachingLoader.load(CompositeClassLoader.java:237) [knowledge-api-5.4.0.Final.jar:5.4.0.Final] at org.drools.util.CompositeClassLoader.loadClass(CompositeClassLoader.java:88) [knowledge-api-5.4.0.Final.jar:5.4.0.Final] at java.lang.ClassLoader.loadClass(ClassLoader.java:295) [rt.jar:1.6.0_30] at java.lang.ClassLoader.loadClass(ClassLoader.java:247) [rt.jar:1.6.0_30] at a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0InvokerGenerated.evaluate(Unknown Source) at a.b.c.Rule_gg___unique___name_656ee3db19d34e689d95e2d6b2be67b6Eval0Invoker.evaluate(Unknown Source) at org.drools.rule.EvalCondition.isAllowed(EvalCondition.java:114) [drools-core-5.4.0.Final.jar:5.4.0.Final] Any idea where this is coming from or what's causing this. We are using: - JBoss 7.1.1 - drools 5.4.0.Final - jdk 1.6u30 - Windows 7 64 bit regards, Kenneth -- View this message in context: http://drools.46999.n3.nabble.com/java-lang-LinkageError-but-only-sometimes-tp4020606.html Sent from the Drools: User forum 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] Unsubscribe
Thank you! Brenda Chodkowski Software Engineer brenda.chodkow...@ctg.com Tel: Cell: 716-696-2313 (Monday, Tuesday) * 716-888-3681 (Wednesday, Thursday, Friday) CTG * 700 Delaware Ave * Buffalo, NY 14209 www.ctg.com [cid:image001.jpg@01CDB73A.23606B00] The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you are not the intended recipient of this message, please contact the sender and delete this material from this computer. <>___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] JITting error with 5.5.0.CR1
I should have added that the script still completes successfully, it is only
the JIT optimization that is having problems and only when some threshold is
reached causing an attempt at performing the optimization - as per
descriptions I have read earlier. The problem is that I thought there was a
fix already in place for this problem if I read the earlier posts correctly
but perhaps I do not know how to enable it.
paulk_asert wrote
> When I run this Groovy script using drools 5.5.0.CR1 with numAnimals = 8
> and numLegs = 120, it works fine. If I set numAnimals = 17 and numLegs =
> 1020 then it fails with a JITting error. I saw a bunch of Jira issues
> related to JITting issues but no open ones seemed to match exactly.
>
> @GrabResolver('https://repository.jboss.org/nexus/content/groups/public-jboss/')
> @Grab('org.drools:knowledge-api:5.5.0.CR1')
> @Grab('org.drools:drools-compiler:5.5.0.CR1')
> @Grab('org.drools:drools-core:5.5.0.CR1')
> @Grab('com.sun.xml.bind:jaxb-xjc:2.2.5.jboss-1')
> @GrabExclude('com.github.relaxng:relaxngDatatype')
> @GrabResolver('http://repo2.maven.org/maven2/')
> @Grab('org.mvel#mvel2;2.1.2.Final')
> @Grab('org.slf4j#slf4j-simple;1.6.4')
> import groovy.transform.Immutable
> import static org.drools.KnowledgeBaseFactory.newKnowledgeBase
> import static
> org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder
> import static org.drools.builder.ResourceType.DRL
> import static org.drools.io.ResourceFactory.newReaderResource
>
> def numAnimals = 8
> def numLegs = 120
> def kbuilder = newKnowledgeBuilder()
> def drl = '''
> dialect "mvel"
> rule "deduce animal counts"
> when
> $crane : Crane( )
> $centipede : Centipede( )
> $tortoise : Tortoise(
> quantity + $crane.quantity + $centipede.quantity == ''' + numAnimals
> + ''',
> quantity * numLegs + $crane.quantity * $crane.numLegs +
> $centipede.quantity * $centipede.numLegs == ''' + numLegs + '''
> )
> then
> System.out.println( "Cranes " + $crane.getQuantity() )
> System.out.println( "Tortoises " + $tortoise.getQuantity() )
> System.out.println( "Centipedes " + $centipede.getQuantity() )
> end
> '''
> kbuilder.add(newReaderResource(new StringReader(drl)), DRL)
> def kbase = newKnowledgeBase()
> kbase.addKnowledgePackages(kbuilder.knowledgePackages)
> def ksession = kbase.newStatefulKnowledgeSession()
>
> (numAnimals + 1).times { n ->
> if (numLegs.intdiv(Crane.numLegs) >= n) {
> ksession.insert(new Crane(n))
> }
> if (numLegs.intdiv(Tortoise.numLegs) >= n) {
> ksession.insert(new Tortoise(n))
> }
> if (numLegs.intdiv(Centipede.numLegs) >= n) {
> ksession.insert(new Centipede(n))
> }
> }
>
> ksession.fireAllRules()
> ksession.dispose()
>
> @Immutable
> class Crane {
> static int numLegs = 2
> int quantity
> }
>
> @Immutable
> class Tortoise {
> static int numLegs = 4
> int quantity
> }
>
> @Immutable
> class Centipede {
> static int numLegs = 100
> int quantity
> }
>
> Here is the error message:
>
> Exception in thread "Thread-1" java.lang.RuntimeException: Exception
> jitting: quantity + $crane.quantity + $centipede.quantity == 17 &&
> quantity * numLegs + $crane.quantity * $crane.numLegs +
> $centipede.quantity * $centipede.numLegs == 1020
> at
> org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:275)
> at
> org.drools.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:51)
> at
> org.drools.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:250)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
> at java.lang.Thread.run(Thread.java:722)
> Caused by: java.lang.RuntimeException: java.lang.RuntimeException: Error
> writing method evaluate
> at
> org.drools.rule.builder.dialect.asm.ClassGenerator.newInstance(ClassGenerator.java:200)
> at
> org.drools.rule.constraint.ASMConditionEvaluatorJitter.jitEvaluator(ASMConditionEvaluatorJitter.java:53)
> at
> org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:273)
> ... 5 more
> Caused by: java.lang.RuntimeException: Error writing method evaluate
> at
> org.drools.rule.builder.dialect.asm.ClassGenerator$MethodDescr.write(ClassGenerator.java:881)
> at
> org.drools.rule.builder.dialect.asm.ClassGenerator.generateBytecode(ClassGenerator.java:128)
> at
> org.drools.rule.builder.dialect.asm.ClassGenerator.generateClass(ClassGenerator.java:144)
> at
> org.drools.rule.builder.dialect.asm.ClassGenerator.newInstance(ClassGenerator.java:198)
> ... 7 more
> Caused by: java.lang.ArrayIndexOutOfBoundsException: 0
> at org.mvel2.asm.Frame.merge(Frame.java:1373)
> at org.mvel2.asm.Frame.merge(Frame.java:1329)
> at org.mvel2.asm.MethodWriter.visitMaxs(MethodWriter.java:1282)
> at
> org.drools.rule.bui
Re: [rules-users] To expose Rule created in drools expert as a webservice
Hi, On Wed, Oct 31, 2012 at 6:15 PM, amit wrote: > I am starting with Drools expert My usecase is to expose the rule written > in Drools Expert as webservice. This webservice can be consumed by some > external application. My question: Is this feasible. Thanks a lot in > advance. > I'm starting to do this. I think it's feasible - I think there should be official support. This is my approach: - Since Drools is single-threaded, it should only run on one worker thread - It will use queues to talk to the web thread - receive objects to insert before the rules are fired, and send objects inserted after the rules are fired. - to send objects, I'm using queries in the DRL file, and a live query to listen for new objects to add to the queue for sending out Hope this helps (and I hope it's correct!) regards, Miguel ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Debug rule functions ?
Hi, the best option I've seen by now is the one mentioned by Armand Welsh - use imported java class with methods instead of drools functions. btw: by now I group my classes into jars, but I've never tried to use standalone .class files. anyone tried this? anything special (some settings) in order .class to be found? (note: I use local .drl files instead of Guvnor repository to load rules into memory) -- View this message in context: http://drools.46999.n3.nabble.com/Debug-rule-functions-tp3689774p4020602.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] enquiry on drools webservice
Hi Prem, Do you have any update on this. I am also trying to expose a rule as webservice Many thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/enquiry-on-drools-webservice-tp56673p4020601.html Sent from the Drools: User forum 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] To expose Rule created in drools expert as a webservice
I am starting with Drools expertMy usecase is to expose the rule written in Drools Expert as webservice.This webservice can be consumed by some external application.My question: Is this feasible.Thanks a lot in advance. -- View this message in context: http://drools.46999.n3.nabble.com/To-expose-Rule-created-in-drools-expert-as-a-webservice-tp4020600.html Sent from the Drools: User forum mailing list archive at Nabble.com.___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Eclipse Debugging Drl file
Hello, I faced with the same problem. Breakpoints are not being hit by debugger. I have Eclipse SDK version: 4.2.1 and went through the reference manual of Drools and followed each step carefully. -Installed GEF - Downloaded drools-distribution-5.4.0.Final.zip -Unzipped it into Eclipse main folder -Restarted Eclipse -Defined run time based on the latest Drools project jars included in the plugin itself. -Created Drools Project -Created new launch configuration for Drools Application. -Put a breakpoint in the helloworld simple project on the first line of the section "then". When I debug it as Drools Application, debugger stops in Java breakpoints but doesn't stop in drl rule. Any solutions, how can I fix it? Thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/Eclipse-Debugging-Drl-file-tp3870257p4020599.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Debug rule functions ?
Hello, I also followed reference manual of Drools but breakpoints are not being hit by debugger in drl. The steps that I went through: -Installed GEF - downloaded drools-distribution-5.4.0.Final.zip -unzipped it into Eclipse main folder -restarted Eclipse -defined run time based on the latest Drools project jars included in the plugin itself, -Created Drools Project -Created new launch configuration for Drools Application. -Put a breakpoint in the helloworld simple project on the first line of the section "then". When I debug it as Drools Application, debugger doesn't stop in drl rule. Any solutions, how can I fix it? Thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/Debug-rule-functions-tp3689774p4020598.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] debug
Hello, I faced with the same problem. Breakpoints are not being hit by debugger. I have Eclipse SDK version: 4.2.1 and went through the reference manual of Drools and followed each step carefully. -Installed GEF - Downloaded drools-distribution-5.4.0.Final.zip -Unzipped it into Eclipse main folder -Restarted Eclipse -Defined run time based on the latest Drools project jars included in the plugin itself. -Created Drools Project -Created new launch configuration for Drools Application. -Put a breakpoint in the helloworld simple project on the first line of the section "then". When I debug it as Drools Application, debugger stops in Java breakpoints but doesn't stop in drl rule. Also tried what Bruno suggested but it did not worked too. Any other solutions, how can I fix it? Thanks in advance. -- View this message in context: http://drools.46999.n3.nabble.com/debug-tp3889772p4020597.html Sent from the Drools: User forum mailing list archive at Nabble.com. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
