Re: [rules-users] Expert Systems and Functional programming?
Indeed, this thesis mentions a few features of the system I was talking about :-) ([13]) -W On 11/03/2013, Mark Proctor mproc...@codehaus.org wrote: There were a number of research efforts that looked at combining procedural and rule base programming. This one is quite interesting: Combining Rule-Based and Procedural Programming in the XC and XE Programming Lanaugages http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.9.1106rep=rep1type=pdf Mark On 11 Mar 2013, at 18:03, Wolfgang Laun wolfgang.l...@gmail.com wrote: On 11 March 2013 16:19, Mark Proctor mproc...@codehaus.org wrote: So thinking really long term here. Can we build a java layer that provide all the rule functionality we need - but fit ontop of the java language neatly. We'd probably need to allow rule keyword and have it in Classes, at the method level. All class members and methods would be available to the rules in that class. There is this production rule system where you can write your rules embedded in compiling units, and alongside the legacy program units, of a procedural, modular, strongly type HLL, and where you use expressions in the language's own syntax in constraints... We've been using it ever since 1986. Rabbi Akiva was right, wasn't he ;-) -W ___ 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] Drools 5.5 and jBPM 5.4 on Weblogic 10.3.4
Hi, I have been struggling to get drools 5.5 and jBPM 5.4 embedded in a weblogic 10.3.4 application. Seems like there is some conflict between drools and weblogic jars. But how to resolve? This is the exception I am getting - java.lang.NoSuchMethodError: org.drools.util.CompositeClassLoader.clone()Lorg/drools/util/CompositeClassLoader; at org.drools.compiler.PackageBuilderConfiguration.getClassLoader(PackageBuilderConfiguration.java:362) at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.setCompiler(JavaDialectConfiguration.java:98) at org.drools.rule.builder.dialect.java.JavaDialectConfiguration.init(JavaDialectConfiguration.java:61) at org.drools.compiler.PackageBuilderConfiguration.addDialect(PackageBuilderConfiguration.java:317) at org.drools.compiler.PackageBuilderConfiguration.buildDialectConfigurationMap(PackageBuilderConfiguration.java:307) at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:192) at org.drools.compiler.PackageBuilderConfiguration.init(PackageBuilderConfiguration.java:170) at org.drools.builder.impl.KnowledgeBuilderFactoryServiceImpl.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactoryServiceImpl.java:22) at org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(KnowledgeBuilderFactory.java:75) at org.drools.container.spring.beans.KnowledgeBaseBeanFactory.afterPropertiesSet(KnowledgeBaseBeanFactory.java:80) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1477) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1417) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519) at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456) at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293) at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222) at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290) at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192) at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567) at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895) at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425) at org.springframework.web.context.ContextLoader.createWebApplicationContext(ContextLoader.java:282) at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:204) at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:47) at weblogic.servlet.internal.EventsManager$FireContextListenerAction.run(EventsManager.java:481) at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321) at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:120) at weblogic.servlet.internal.EventsManager.notifyContextCreatedEvent(EventsManager.java:181) at weblogic.servlet.internal.WebAppServletContext.preloadResources(WebAppServletContext.java:1872) at weblogic.servlet.internal.WebAppServletContext.start(WebAppServletContext.java:3153) at weblogic.servlet.internal.WebAppModule.startContexts(WebAppModule.java:1508) at weblogic.servlet.internal.WebAppModule.start(WebAppModule.java:482) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119) at weblogic.application.internal.flow.ScopedModuleDriver.start(ScopedModuleDriver.java:200) at weblogic.application.internal.flow.ModuleListenerInvoker.start(ModuleListenerInvoker.java:247) at weblogic.application.internal.flow.ModuleStateDriver$3.next(ModuleStateDriver.java:425) at weblogic.application.utils.StateMachineDriver.nextState(StateMachineDriver.java:52) at weblogic.application.internal.flow.ModuleStateDriver.start(ModuleStateDriver.java:119) at weblogic.application.internal.flow.StartModulesFlow.activate(StartModulesFlow.java:27) at
[rules-users] Ignore subsequent conditions in a Decision Table based on previous condition
Hi, I'm new to Drools and I'm implementing rules using Excel decision tables and I need some of your help. I have some rules in which depending on a condition the following condition is not necessary, how can I define a table that akllows to define this? For instance I have: CONDITION CONDITION CONDITION ACTION Y result1 NN Y result2 NN N result3 NY N result4 NY Y result5 In the example above (I hope you can see it right) if the first condition value is Y the other 2 conditions values don't matter and despite their value the result will always be the same. I wouldn't want to have to write all the possible combinations as these in the real case will add a lot of complexity to the tables. How can I accomplish this? Is it possible to do it in Excel? If not, how can I do it in another way (for instantance with guvnor web-based tables). -- View this message in context: http://drools.46999.n3.nabble.com/Ignore-subsequent-conditions-in-a-Decision-Table-based-on-previous-condition-tp4022778.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] Ignore subsequent conditions in a Decision Table based on previous condition
If a CONDITION (or ACTION for that matter) is not to apply for a given rule you should be able to simply leave the cell empty. CONDITION CONDITION CONDITION ACTION Y result1 N N Y result2 N N N result3 N Y N result4 N Y Y result5 On 12 March 2013 10:03, ciberg2 joaoguerr...@gmail.com wrote: Hi, I'm new to Drools and I'm implementing rules using Excel decision tables and I need some of your help. I have some rules in which depending on a condition the following condition is not necessary, how can I define a table that akllows to define this? For instance I have: CONDITION CONDITION CONDITION ACTION Y result1 NN Y result2 NN N result3 NY N result4 NY Y result5 In the example above (I hope you can see it right) if the first condition value is Y the other 2 conditions values don't matter and despite their value the result will always be the same. I wouldn't want to have to write all the possible combinations as these in the real case will add a lot of complexity to the tables. How can I accomplish this? Is it possible to do it in Excel? If not, how can I do it in another way (for instantance with guvnor web-based tables). -- View this message in context: http://drools.46999.n3.nabble.com/Ignore-subsequent-conditions-in-a-Decision-Table-based-on-previous-condition-tp4022778.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] Ignore subsequent conditions in a Decision Table based on previous condition
manstis, thank you for your fast reply! I can't believe it was so simple and I couldn't find the answer :) (bangs head against the wall). I will do that then. Thank you again. -- View this message in context: http://drools.46999.n3.nabble.com/Ignore-subsequent-conditions-in-a-Decision-Table-based-on-previous-condition-tp4022778p4022780.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] Expert Systems and Functional programming?
On 12 Mar 2013, at 02:10, Grant Rettke gret...@acm.org wrote: On Mon, Mar 11, 2013 at 10:19 AM, Mark Proctor mproc...@codehaus.org wrote: For instance here is an idea I've been mulling over recently (note just random ideas, not roadmap). We don't have the resources to completely compete against other languages, and I'm not sure we should do. With Java8 and 9 it starts to become a more compelling language. Java8 brings lambs and java9 solve the perm gen issue (so we can stop using MVEL, and just go pure code generation and not worry about blowing the perm gen). Could we create a system that better layers with java9? Any other JVM languages that would serve you well right now? Anyone that offers type safety. So Scala, Ceylon, Koitlin would all be contenders. Java is simply the lowest common denominator that reaches the widest possible mark. But as mentioned, base java is not enough - we'd need to layer property accessors on it. Mark ___ 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] Expert Systems and Functional programming?
OPS83? http://repository.cmu.edu/cgi/viewcontent.cgi?article=2478context=compsci or YES/L1? (seems information on this is out of print and not online either) http://www.amazon.com/dp/B00070YQSU/ref=r_soa_w_d YES/L1: Integrating expert systems technology with traditional programming languages (Research Report RC. International Business Machines Inc. Research Division) I definitely find linq interesting, as it's straight out of the research pages from these projects - I wonder if the linq/database propel know about these… The first time I saw it was in this paper procedural match augments data-driven match http://www.aaai.org/Papers/AAAI/1986/AAAI86-037.pdf They move the lhs logic into the consequence block, using the actual when part as a simple goal trigger - allowing the 'lhs' to be used procedurally, like linq. This allows them to control when a rule is evaluated and that it's evaluation is atomic, and can have cleanup work done. Mark On 12 Mar 2013, at 06:04, Wolfgang Laun wolfgang.l...@gmail.com wrote: Indeed, this thesis mentions a few features of the system I was talking about :-) ([13]) -W On 11/03/2013, Mark Proctor mproc...@codehaus.org wrote: There were a number of research efforts that looked at combining procedural and rule base programming. This one is quite interesting: Combining Rule-Based and Procedural Programming in the XC and XE Programming Lanaugages http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.9.1106rep=rep1type=pdf Mark On 11 Mar 2013, at 18:03, Wolfgang Laun wolfgang.l...@gmail.com wrote: On 11 March 2013 16:19, Mark Proctor mproc...@codehaus.org wrote: So thinking really long term here. Can we build a java layer that provide all the rule functionality we need - but fit ontop of the java language neatly. We'd probably need to allow rule keyword and have it in Classes, at the method level. All class members and methods would be available to the rules in that class. There is this production rule system where you can write your rules embedded in compiling units, and alongside the legacy program units, of a procedural, modular, strongly type HLL, and where you use expressions in the language's own syntax in constraints... We've been using it ever since 1986. Rabbi Akiva was right, wasn't he ;-) -W ___ 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] Instant Drools Starter : Pack Publishing (Jeremy Ary)
On Tue, Mar 12, 2013 at 10:00 AM, Mark Proctor mproc...@codehaus.org wrote: http://blog.athico.com/2013/03/instant-drools-starter-pack-publishing.html Nice! Just ordered it. ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Expert Systems and Functional programming?
Mark, no, the system I'm talking about is PAMELA, developed here in Vienna. You may find references to papers citing PAMELA, authored by F.Barachini and N.Theuretzbacher (one is referenced in the thesis you quoted, see [13]), but I doubt that you'l find one of the papers on the web. It was pre-internet days way back then :-) If you could produce an RBS ranking based on rules fired in production, I think that PAMELA would be in an excellent position. There's a three-digit number of installations by now, but they're running 24/7. -W On 12/03/2013, Mark Proctor mproc...@codehaus.org wrote: OPS83? http://repository.cmu.edu/cgi/viewcontent.cgi?article=2478context=compsci or YES/L1? (seems information on this is out of print and not online either) http://www.amazon.com/dp/B00070YQSU/ref=r_soa_w_d YES/L1: Integrating expert systems technology with traditional programming languages (Research Report RC. International Business Machines Inc. Research Division) I definitely find linq interesting, as it's straight out of the research pages from these projects - I wonder if the linq/database propel know about these… The first time I saw it was in this paper procedural match augments data-driven match http://www.aaai.org/Papers/AAAI/1986/AAAI86-037.pdf They move the lhs logic into the consequence block, using the actual when part as a simple goal trigger - allowing the 'lhs' to be used procedurally, like linq. This allows them to control when a rule is evaluated and that it's evaluation is atomic, and can have cleanup work done. Mark On 12 Mar 2013, at 06:04, Wolfgang Laun wolfgang.l...@gmail.com wrote: Indeed, this thesis mentions a few features of the system I was talking about :-) ([13]) -W On 11/03/2013, Mark Proctor mproc...@codehaus.org wrote: There were a number of research efforts that looked at combining procedural and rule base programming. This one is quite interesting: Combining Rule-Based and Procedural Programming in the XC and XE Programming Lanaugages http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.9.1106rep=rep1type=pdf Mark On 11 Mar 2013, at 18:03, Wolfgang Laun wolfgang.l...@gmail.com wrote: On 11 March 2013 16:19, Mark Proctor mproc...@codehaus.org wrote: So thinking really long term here. Can we build a java layer that provide all the rule functionality we need - but fit ontop of the java language neatly. We'd probably need to allow rule keyword and have it in Classes, at the method level. All class members and methods would be available to the rules in that class. There is this production rule system where you can write your rules embedded in compiling units, and alongside the legacy program units, of a procedural, modular, strongly type HLL, and where you use expressions in the language's own syntax in constraints... We've been using it ever since 1986. Rabbi Akiva was right, wasn't he ;-) -W ___ 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] Implementing Refraction with Drools
Mark Proctor mproctor at codehaus.org writes:
You can improve your example by using an agenda listener to remove
Activations once they are cancelled,
this way you avoid a memory leak.
Further you can use annotations, to control this per rule.
rule xxx @repeatable(true) when
then end
then in your filter you can check rule.getMetaData( repeatable )
We aren't going to add this to Drools right now, but it certainly is a
useful example for people.
We'll be reviewing execution control during the 6.x series, and we'll look
at it then. I believe that you can
have different types of repeability, and I'd like to look at rising falling
edges. It's important that you
don't add features one at a time, as one might make another impossible. So
these things must be look at, as a
whole, and planned out.
Mark
On 23 Jan 2013, at 00:39, magaram magaram at deltadentalmi.com wrote:
Thanks for the clarifications Mark and Wolfgang. I wanted to share some
additional data.
I was trying to reproduce the same behavior that ILOG JRules exhibits by
default for refraction.
My experiment with no-loop and lock-on-active did not work when I compared
against my baseline results with JRules. However, the interesting part was
when I ratified the agenda filter as follows (wrong and hacky as it is) -
removed the encounteredActivations.remove(act) before returning false, it
matched the ILOG baselines exactly. I ran through 46 test cases as part of
my baseline, all of which have several looping opportunities single and
complex. My earlier agenda filter implementation that I posted earlier did
not yield identical results with the JRules baseline.
It seems this logic for refraction seems to mimic JRules refraction
behavior. From commercial use case perspective refraction/repeatability
control is important. ILOG implements refraction out of the box as part of
conflict resolution. However they offer up a antecedent directive called
refresh (in lieu of update) that overrides refraction...
import java.util.ArrayList;
import java.util.List;
import org.drools.runtime.rule.Activation;
import org.drools.runtime.rule.AgendaFilter;
/**
* This custom agenda filter injects refraction behavior into the rule
engine
* @author Mukundan Agaram
*
*/
public class RefractionAgendaFilter implements AgendaFilter {
private ListActivation encounteredActivations = new
ArrayListActivation();
@Override
public boolean accept(Activation act)
{
//Check for a Refraction
if (encounteredActivations.contains(act))
{
return false;
}
//Otherwise add the rule to check for potential refractions in
the future
encounteredActivations.add(act);
//select the rule to be part of the agenda
return true;
}
}
--
View this message in context:
http://drools.46999.n3.nabble.com/Implementing-Refraction-with-Drools-
tp4021705p4021747.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
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Using an activation listener could help to eliminate the memory leak, but with
the current implementation, it does not. When activations are added and
removed from the agenda, events are generated properly, in general. However,
there is one case that fails. If an activation is actually fired, then it
remains on the agenda and, because it was previously fired, if it is later
removed from the agenda, no activation event is fired. Unfortunately, this
missing event is precisely the event that is needed to clean out your cache of
previously-fired activations. (This hole existed in Drools 4 and also in
Drools 5 when I checked a few months ago. Perhaps it has been fixed since
then.)
If that hole were plugged, then this strategy would certainly do the job.
Neverhteless, based on other comments in this thread, I'm not sure if there
isn't a performance concern, though what other option is there until
@repeatable (or some alternative) is implemented?
-Jim
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[rules-users] [REQUEST] upgrade next version of drools to use the newer Janino library.
I am using the cascading 2.1 which bundles a newer version of the janino 2.6.1. I'd like to see the next version of drools updated with the newer janino. -- View this message in context: http://drools.46999.n3.nabble.com/REQUEST-upgrade-next-version-of-drools-to-use-the-newer-Janino-library-tp4022788.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] Implementing Refraction with Drools
The even is there, just it's an internal feature at the moment.
There is an unmatch callback, for when a rule stops being true, see
testActivationUnMatchListener:
https://github.com/droolsjbpm/drools/blob/master/drools-core/src/test/java/org/drools/reteoo/AgendaTest.java
What you can do is set a call back during the activation created event. You'll
need to cast to an internal concrete class first, AgendaItem. Remember these
interfaces and classes will change over time.
Mark
On 12 Mar 2013, at 18:53, Jim Hahn j...@att.com wrote:
Mark Proctor mproctor at codehaus.org writes:
You can improve your example by using an agenda listener to remove
Activations once they are cancelled,
this way you avoid a memory leak.
Further you can use annotations, to control this per rule.
rule xxx @repeatable(true) when
then end
then in your filter you can check rule.getMetaData( repeatable )
We aren't going to add this to Drools right now, but it certainly is a
useful example for people.
We'll be reviewing execution control during the 6.x series, and we'll look
at it then. I believe that you can
have different types of repeability, and I'd like to look at rising falling
edges. It's important that you
don't add features one at a time, as one might make another impossible. So
these things must be look at, as a
whole, and planned out.
Mark
On 23 Jan 2013, at 00:39, magaram magaram at deltadentalmi.com wrote:
Thanks for the clarifications Mark and Wolfgang. I wanted to share some
additional data.
I was trying to reproduce the same behavior that ILOG JRules exhibits by
default for refraction.
My experiment with no-loop and lock-on-active did not work when I compared
against my baseline results with JRules. However, the interesting part was
when I ratified the agenda filter as follows (wrong and hacky as it is) -
removed the encounteredActivations.remove(act) before returning false, it
matched the ILOG baselines exactly. I ran through 46 test cases as part of
my baseline, all of which have several looping opportunities single and
complex. My earlier agenda filter implementation that I posted earlier did
not yield identical results with the JRules baseline.
It seems this logic for refraction seems to mimic JRules refraction
behavior. From commercial use case perspective refraction/repeatability
control is important. ILOG implements refraction out of the box as part of
conflict resolution. However they offer up a antecedent directive called
refresh (in lieu of update) that overrides refraction...
import java.util.ArrayList;
import java.util.List;
import org.drools.runtime.rule.Activation;
import org.drools.runtime.rule.AgendaFilter;
/**
* This custom agenda filter injects refraction behavior into the rule
engine
* @author Mukundan Agaram
*
*/
public class RefractionAgendaFilter implements AgendaFilter {
private ListActivation encounteredActivations = new
ArrayListActivation();
@Override
public boolean accept(Activation act)
{
//Check for a Refraction
if (encounteredActivations.contains(act))
{
return false;
}
//Otherwise add the rule to check for potential refractions in
the future
encounteredActivations.add(act);
//select the rule to be part of the agenda
return true;
}
}
--
View this message in context:
http://drools.46999.n3.nabble.com/Implementing-Refraction-with-Drools-
tp4021705p4021747.html
Sent from the Drools: User forum mailing list archive at Nabble.com.
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rules-users at lists.jboss.org
https://lists.jboss.org/mailman/listinfo/rules-users
Using an activation listener could help to eliminate the memory leak, but
with
the current implementation, it does not. When activations are added and
removed from the agenda, events are generated properly, in general. However,
there is one case that fails. If an activation is actually fired, then it
remains on the agenda and, because it was previously fired, if it is later
removed from the agenda, no activation event is fired. Unfortunately, this
missing event is precisely the event that is needed to clean out your cache
of
previously-fired activations. (This hole existed in Drools 4 and also in
Drools 5 when I checked a few months ago. Perhaps it has been fixed since
then.)
If that hole were plugged, then this strategy would certainly do the job.
Neverhteless, based on other comments in this thread, I'm not sure if there
isn't a performance concern, though what other option is there until
@repeatable (or some alternative) is implemented?
-Jim
Re: [rules-users] [REQUEST] upgrade next version of drools to use the newer Janino library.
Have you tried just using the 2.6.1 janino jar? It may just work. Mark On 12 Mar 2013, at 19:06, Felix fe...@bluekai.com wrote: I am using the cascading 2.1 which bundles a newer version of the janino 2.6.1. I'd like to see the next version of drools updated with the newer janino. -- View this message in context: http://drools.46999.n3.nabble.com/REQUEST-upgrade-next-version-of-drools-to-use-the-newer-Janino-library-tp4022788.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] [REQUEST] upgrade next version of drools to use the newer Janino library.
I tried. It throws lang.NoClassDefFoundError: org/codehaus/janino/CompileException because the class file moved to a different jar file and package location. On Tue, Mar 12, 2013 at 12:18 PM, Mark Proctor mproc...@codehaus.orgwrote: Have you tried just using the 2.6.1 janino jar? It may just work. Mark On 12 Mar 2013, at 19:06, Felix fe...@bluekai.com wrote: I am using the cascading 2.1 which bundles a newer version of the janino 2.6.1. I'd like to see the next version of drools updated with the newer janino. -- View this message in context: http://drools.46999.n3.nabble.com/REQUEST-upgrade-next-version-of-drools-to-use-the-newer-Janino-library-tp4022788.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 mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
[rules-users] configuring timings for event expiry
Hi , I was wondering if it is possible to write a rule in such a way that you are able to set the 'this after' for events using an attribute from a class. rule correlate orders when $bo : BuyOrderEvent( $id : id ) $ae : AckEvent( id == $id, this after[0,10s] $bo ) then // do something end in the above rule template I would like to set the this after [0,10] part using a custom value from say a date attribute of the BuyOrderEvent class. Thanks for your time. -- View this message in context: http://drools.46999.n3.nabble.com/configuring-timings-for-event-expiry-tp4022792.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] Confused by Simple Self-Loop Problem
You are most likely going into an infinite loop. Drools happened to pick that activation first every time and never came out of the loop. If you see the audit view below, notice that there are 3 activations and only 1 keeps firing an is in a loop and the other 2 didnt get a chance to fire. But, there are activations. http://drools.46999.n3.nabble.com/file/n4022793/audit.jpg -- View this message in context: http://drools.46999.n3.nabble.com/Confused-by-Simple-Self-Loop-Problem-tp4022774p4022793.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] Implementing Refraction with Drools
I just downloaded the last Drools 5.5 source code and it still has the problem. In DefaultAgenda.java, at line 707 in the cancelActivation() method, it calls decreaseDormantActivations(), but doesn't bother to fire an ActivationCancelled event. If lines 701-703 are copied before line 707, then that is a quick way to fix the problem. (I have not checked 6.0) -Jim -- View this message in context: http://drools.46999.n3.nabble.com/Implementing-Refraction-with-Drools-tp4021705p4022794.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] Implementing Refraction with Drools
The code looks ok to me. If an activation has fired, then you cannot cancel it. Cancelled events are only for activations that are true and have not yet fired. Read my previous email about how to use the unmatch listener, that will do what you want. Mark On 12 Mar 2013, at 20:49, jrh3 j...@att.com wrote: I just downloaded the last Drools 5.5 source code and it still has the problem. In DefaultAgenda.java, at line 707 in the cancelActivation() method, it calls decreaseDormantActivations(), but doesn't bother to fire an ActivationCancelled event. If lines 701-703 are copied before line 707, then that is a quick way to fix the problem. (I have not checked 6.0) -Jim -- View this message in context: http://drools.46999.n3.nabble.com/Implementing-Refraction-with-Drools-tp4021705p4022794.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] Expert Systems and Functional programming?
Actually Pamela is one of the papers I've been trying to track down, can't get it on the internet any more. As I first saw it referenced in Production matching for large learning systems. You don't by chance have the paper still? Barachini, F. (1991) The evolution of PAMELA. Expert Systems, 8(2):87-98 I'm building up a collection of relevant research papers, over at mendelay. That is one of my missing papers, that I've been unable to track: http://www.mendeley.com/groups/2918061/rule-systems/papers/ Mark On 12 Mar 2013, at 18:28, Wolfgang Laun wolfgang.l...@gmail.com wrote: Mark, no, the system I'm talking about is PAMELA, developed here in Vienna. You may find references to papers citing PAMELA, authored by F.Barachini and N.Theuretzbacher (one is referenced in the thesis you quoted, see [13]), but I doubt that you'l find one of the papers on the web. It was pre-internet days way back then :-) If you could produce an RBS ranking based on rules fired in production, I think that PAMELA would be in an excellent position. There's a three-digit number of installations by now, but they're running 24/7. -W On 12/03/2013, Mark Proctor mproc...@codehaus.org wrote: OPS83? http://repository.cmu.edu/cgi/viewcontent.cgi?article=2478context=compsci or YES/L1? (seems information on this is out of print and not online either) http://www.amazon.com/dp/B00070YQSU/ref=r_soa_w_d YES/L1: Integrating expert systems technology with traditional programming languages (Research Report RC. International Business Machines Inc. Research Division) I definitely find linq interesting, as it's straight out of the research pages from these projects - I wonder if the linq/database propel know about these… The first time I saw it was in this paper procedural match augments data-driven match http://www.aaai.org/Papers/AAAI/1986/AAAI86-037.pdf They move the lhs logic into the consequence block, using the actual when part as a simple goal trigger - allowing the 'lhs' to be used procedurally, like linq. This allows them to control when a rule is evaluated and that it's evaluation is atomic, and can have cleanup work done. Mark On 12 Mar 2013, at 06:04, Wolfgang Laun wolfgang.l...@gmail.com wrote: Indeed, this thesis mentions a few features of the system I was talking about :-) ([13]) -W On 11/03/2013, Mark Proctor mproc...@codehaus.org wrote: There were a number of research efforts that looked at combining procedural and rule base programming. This one is quite interesting: Combining Rule-Based and Procedural Programming in the XC and XE Programming Lanaugages http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.9.1106rep=rep1type=pdf Mark On 11 Mar 2013, at 18:03, Wolfgang Laun wolfgang.l...@gmail.com wrote: On 11 March 2013 16:19, Mark Proctor mproc...@codehaus.org wrote: So thinking really long term here. Can we build a java layer that provide all the rule functionality we need - but fit ontop of the java language neatly. We'd probably need to allow rule keyword and have it in Classes, at the method level. All class members and methods would be available to the rules in that class. There is this production rule system where you can write your rules embedded in compiling units, and alongside the legacy program units, of a procedural, modular, strongly type HLL, and where you use expressions in the language's own syntax in constraints... We've been using it ever since 1986. Rabbi Akiva was right, wasn't he ;-) -W ___ 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 ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
