Re: [rules-users] Drools Planner changing problem fact
Op 17-07-12 20:54, Garf schreef: last month, Ralph wrote: /All the examples in the drools-planner-examples seem to have a fixed list of problem facts (rooms, teachers, timeslots) which only should be combined optimally./ Just to address this one unanswered point. The Cloud Balancing example does support changing the problem facts, specifically by removing computers (bins). The last section of the planner documentation (section 12.4) addresses realtime planning, through the Solver.addProblemFactChange() API. This works whether you are removing problem facts (as the example shows) or modifying their contents. This generally restarts the Solver -- but, if you are relatively optimized, the adjustment is found relatively fast. Internally, it restarts the Solver, but not from scratch, it restarts starting from the best solution of the last run. As a Solver user, you don't even notice this in your code, you just call addProblemFactChange(). And it only takes milliseconds to find a feasible solution, see the log below this video: http://blog.athico.com/2011/07/real-time-planning-with-drools-planner.html (I'm curious, though -- does the Solver expressly prioritize doing moves associated with those problem facts that were just changed?) Not really, unless you count this: A construction heuristic will only assigning the unassigned entities, so any entity that gets unassigned (because of the problem fact change) gets changed first. For example a machine (=problem fact) got killed, so all it's processes (= entities) are unassigned and they get assigned first. After that, normal localSearch kicks in. But you could prioritize moves that affect those associated problem facts if you wanted to. In 5.4 that's very hard to do, but 5.5.0.Beta1 will introduce an interface ProbabilitySelectionWeightFactory to make it easy to do such stuff. I fear it's still going to require domain-specific code though, even if it's just a class implementing that interface. -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Planner-changing-problem-fact-tp4018087p4018742.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 -- With kind regards, Geoffrey De Smet ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Drools-Guvnor integration with Webshere- Exception during startup...Please help!!!
Instead of the guvnor jboss-as-7.0 war, use the guvnor tomcat-6.0 war, that one includes the weld jars. Op 18-07-12 06:17, Ravikiran schreef: Hi, I am deploying drools-guvnor.war (version 5.3.0) into Websphere AS 7. The war file was working perfectly fine in JBoss AS 7. But i am getting below exception when launching the guvnor from browser... [18/07/12 12:09:02:101 SGT] 0032 SystemOut O ERROR 18-07 12:09:02,101 (LoggingHelper.java:error:74) Service method 'public abstract org.drools.guvnor.client.rpc.UserSecurityContext org.drools.guvnor.client.rpc.SecurityService.getCurrentUser()' threw an unexpected exception: java.lang.IllegalStateException: CDI hasn't been properly started. Make sure your IDE classpath is in sync with the real maven classpath. The classpath should include weld-servlet. java.lang.IllegalStateException: CDI hasn't been properly started. Make sure your IDE classpath is in sync with the real maven classpath. The classpath should include weld-servlet. at org.drools.guvnor.server.SecurityServiceServlet.getCurrentUser(SecurityServiceServlet.java:66) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:45) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37) at java.lang.reflect.Method.invoke(Method.java:599) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:569) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) at com.google.gwt.user.server.rpc.AbstractRemoteServiceServlet.doPost(AbstractRemoteServiceServlet.java:62) at javax.servlet.http.HttpServlet.service(HttpServlet.java:738) at javax.servlet.http.HttpServlet.service(HttpServlet.java:831) at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1663) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:939) at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:502) at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:179) at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3826) at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:276) at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:931) at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1583) at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:186) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:445) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:504) at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:301) at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:83) at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165) at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217) at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161) at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138) at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204) at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775) at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1563) [18/07/12 12:09:02:101 SGT] 0032 webappI com.ibm.ws.webcontainer.webapp.WebApp log SRVE0296E: [drools-guvnor_war#drools-guvnor.war][/drools-guvnor][Servlet.LOG]:.Exception while dispatching incoming RPC call:.com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract org.drools.guvnor.client.rpc.UserSecurityContext org.drools.guvnor.client.rpc.SecurityService.getCurrentUser()' threw an unexpected exception: java.lang.IllegalStateException: CDI hasn't been properly started. Make sure your IDE classpath is in sync with the real maven classpath. The classpath should include weld-servlet. at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385) at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processCall(RemoteServiceServlet.java:208) at com.google.gwt.user.server.rpc.RemoteServiceServlet.processPost(RemoteServiceServlet.java:248) at
Re: [rules-users] Error on Build Package Click
Hi Esteban, I can't pass de source code of my rules because it's too much. I've about 1600 rules. Too much to be passed. Can you give me any suggestions? King regards Paco -- View this message in context: http://drools.46999.n3.nabble.com/Error-on-Build-Package-Click-tp4018712p4018749.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] Drools-Guvnor integration with Webshere- Exception during startup...Please help!!!
Hi Geoffrey, I couldn't find any weld related jar files available in guvnor-5.3.0.Final-tomcat-6.0.war. Also i have tried wild card search like weld*, but i couldn't find it. Could you please check whether the below line from the error message might give you some idea, Service method 'public abstract org.drools.guvnor.client.rpc.UserSecurityContext org.drools.guvnor.client.rpc.SecurityService.getCurrentUser()' threw an unexpected exception: java.lang.IllegalStateException: CDI hasn't been properly started. I am struck here without any success since yesterday, please help. thanks. -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Guvnor-integration-with-Webshere-Exception-during-startup-Please-help-tp4018745p4018750.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] Guvnor integration GLOBAL/Remote HTTP resource caching error !!!
hello..i am using the following changeset :
change-set xmlns=http://drools.org/drools-5.0/change-set;
xmlns:xs=http://www.w3.org/2001/XMLSchema-instance;
xs:schemaLocation=http://drools.org/drools-5.0/change-set.xsd
http://anonsvn.jboss.org/repos/labs/labs/jbossrules/trunk/drools-api/src/main/resources/change-set-1.0.0.xsd;
add
resource
source=http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/Individual/LATEST;
type=PKG basicAuthentication=enabled username=admin
password=/
/add
/change-set
and my knowledge base was created using the following code :
KnowledgeAgentConfiguration kaconf =
KnowledgeAgentFactory.newKnowledgeAgentConfiguration();
kaconf.setProperty( drools.agent.scanDirectories,
false );
KnowledgeAgent kagent =
KnowledgeAgentFactory.newKnowledgeAgent( test
agent, kaconf );
System.setProperty(drools.resource.urlcache,
D:\\drools
runtime\\Cache);
ResourceFactory.getResourceChangeNotifierService().start();
ResourceFactory.getResourceChangeScannerService().start();
kagent.applyChangeSet(ResourceFactory.newClassPathResource(changeset.xml));
kbase=kagent.getKnowledgeBase();
}catch(Exception exp){
throw new Exception(exp);
}
return kbase;
and i tried creating a Remote HTTP resource caching , since i was having
the following error beacuse of the GLOBAL ArrayList that i had used :
*java.lang.RuntimeException: Unexpected global [list]
at
org.drools.common.AbstractWorkingMemory.setGlobal(AbstractWorkingMemory.java:613)
at
org.drools.impl.StatefulKnowledgeSessionImpl.setGlobal(StatefulKnowledgeSessionImpl.java:332)
at com.sample.DroolsTest.main(DroolsTest.java:71)*i read smewhere that
creating a local copy will help irradicate the error...
but while creating a local copy i get a new error ...
*(null: 8, 174): cvc-elt.1: Cannot find the declaration of element
'change-set'.
java.io.IOException: Server returned HTTP response code: 401 for URL:
http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/package/Individual/LATEST
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown
Source)
at org.drools.io.impl.UrlResource.grabStream(UrlResource.java:210)
at org.drools.io.impl.UrlResource.cacheStream(UrlResource.java:181)
at org.drools.io.impl.UrlResource.getInputStream(UrlResource.java:142)
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:720)
at
org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:679)
at
org.drools.agent.impl.KnowledgeAgentImpl.addResourcesToKnowledgeBase(KnowledgeAgentImpl.java:979)
at
org.drools.agent.impl.KnowledgeAgentImpl.rebuildResources(KnowledgeAgentImpl.java:774)
at
org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:646)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:192)
at
org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:174)
at com.sample.DroolsTest.readKnowledgeBase(DroolsTest.java:126)
at com.sample.DroolsTest.main(DroolsTest.java:49)*
(null: 8, 174): cvc-elt.1: Cannot find the declaration of element
'change-set'.
i ve neglected this error !!!
Regards,
Abhinay
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Re: [rules-users] Drools-Guvnor integration with Webshere- Exception during startup...Please help!!!
Hi Geoffrey Other Gurus
To throw more light on the above error message, please find below the
getCurrentUser() method snippet that i have taken from the source of
SecurityServiceServlet.java. Please tell me in what cases the
securityService comes as null for causing this exception.
public UserSecurityContext getCurrentUser() {
if (securityService == null) {
// This is the first method called by the client.
// If CDI hasn't kicked in (theoretically impossible...), throw
a readable exception
throw new IllegalStateException(CDI hasn't been properly
started.\n +
Make sure your IDE classpath is in sync with the real
maven classpath.\n +
The classpath should include weld-servlet.);
}
return securityService.getCurrentUser();
}
Thanks a lot
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Re: [rules-users] Drools-Guvnor integration with Webshere- Exception during startup...Please help!!!
Just realized:
We only use CDI, weld, seam 3 and arquillian since Guvnor 5.4.0
In Guvnor 5.3.0 we still use seam 2 (which does not use the CDI spec jars).
So how can you be running into errors that speak about weld-servlet?
Op 18-07-12 14:19, Ravikiran schreef:
Hi Geoffrey Other Gurus
To throw more light on the above error message, please find below the
getCurrentUser() method snippet that i have taken from the source of
SecurityServiceServlet.java. Please tell me in what cases the
securityService comes as null for causing this exception.
public UserSecurityContext getCurrentUser() {
if (securityService == null) {
// This is the first method called by the client.
// If CDI hasn't kicked in (theoretically impossible...), throw
a readable exception
throw new IllegalStateException(CDI hasn't been properly
started.\n +
Make sure your IDE classpath is in sync with the real
maven classpath.\n +
The classpath should include weld-servlet.);
}
return securityService.getCurrentUser();
}
Thanks a lot
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[rules-users] Gwt Error while integrating guvnor with custom application.
Hi, I am new to drools, currently i have deployed drools-guvnor5.3 on jboss AS 5.1GA. I want to use guvnor asset editor in my custom application. I have followed the link http://ilesteban.wordpress.com/2010/11/23/guvnor-embed-assets-editor-in-your-application/. I am using assetEditor.html, but when i click on submit button it says Plugin failed to connect to Development Mode server at localhost:8080 The URL mentioned in my html is http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/standaloneEditorServlet?gwt.codesvr=localhost:8080; as my server is running on localhost:8080. Anybody come across this error and having solution? Please help!!! -- View this message in context: http://drools.46999.n3.nabble.com/Gwt-Error-while-integrating-guvnor-with-custom-application-tp4018754.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] DSL translatio problem for !ucfirst under 5.1.1
Thanks. I downloaded 5.2 and there are no compilation errors. I also need to check to see if one decision table issue (that I had worked around) was solved. However, in 5.2 I get 'org.drools.rule.builder.dialect.java.JavaDialectConfiguration:java:org.drools.rule.builder.dialect.java.JavaDialectConfiguration' ArrowQueryBuilder.xls /redoDesignReal/src/main/rules Unknown Drools Error once per file with rules, i.e., per decision table and dslr file. Reading posts on this error, I am updating Eclipse - which is still updating after 19 hours! Any thoughts on a better approach? This could be caused by other plugins or the Eclipse installation (i.e., the EE version) and its JAR's. Thanks! -- View this message in context: http://drools.46999.n3.nabble.com/DSL-translatio-problem-for-ucfirst-under-5-1-1-tp4018743p4018755.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] Drools-Guvnor integration with Webshere- Exception during startup...Please help!!!
Hi Joffrey, I have downloaded the distribution shows Drools-guvnor 5.3.0, but when i see the Guvnor version from web UI (Adminstration--About) it shows the version as SNAPSOT 5.4.0. Now i too suspect that my Guvnor is of version 5.4.0 only, that's why all those errors were coming. I feel that you have understood the problem now, please tell me what should i do to resolve this. If i required to add any new jar files, please also let me know the location to download them as well. Because i didn't get any related information on internet for this issue so far...you are the only hope! Thanks a lot... -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Guvnor-integration-with-Webshere-Exception-during-startup-Please-help-tp4018745p4018756.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] Gwt Error while integrating guvnor with custom application.
Try removing the 'gwt.codesvr=localhost:8080http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/standaloneEditorServlet?gwt.codesvr=localhost:8080' from the url. That parameter is only valid when GWT is running in dev mode. Best Regards, Esteban Aliverti - Blog @ http://ilesteban.wordpress.com On Wed, Jul 18, 2012 at 3:55 PM, soumya soumya.she...@tcs.com wrote: Hi, I am new to drools, currently i have deployed drools-guvnor5.3 on jboss AS 5.1GA. I want to use guvnor asset editor in my custom application. I have followed the link http://ilesteban.wordpress.com/2010/11/23/guvnor-embed-assets-editor-in-your-application/ . I am using assetEditor.html, but when i click on submit button it says Plugin failed to connect to Development Mode server at localhost:8080 The URL mentioned in my html is http://localhost:8080/drools-guvnor/org.drools.guvnor.Guvnor/standaloneEditorServlet?gwt.codesvr=localhost:8080 as my server is running on localhost:8080. Anybody come across this error and having solution? Please help!!! -- View this message in context: http://drools.46999.n3.nabble.com/Gwt-Error-while-integrating-guvnor-with-custom-application-tp4018754.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] MVEL optimizer error
I was able to reproduce this error locally by updating my version of java to 1.6_31(thought I had but I didn't) The stack trace doesn't give me any information really to go off of. I have around 150 rules of which a dozen will retract the object OrderSideContext. Is there a way to get a better trace to figure out which rule may be causing this? After a retract I thought all other activations on the agenda for the tuple should be cancelled. Is this a wrong assertion? TIA gboro54 wrote I am having an issue with an optimizer stack trace on my linux QA box that I can't seem to reproduce on my windows development box. The stack trace is: 13:01:50,188 ERROR [stderr] (Thread-123) Exception in thread Thread-123 java.lang.RuntimeException: unable to invoke method: com.billing.domain.context.OrderSideContext.getPrimarySide: target of method is null 13:01:50,188 ERROR [stderr] (Thread-123)at org.mvel2.optimizers.impl.refl.nodes.GetterAccessor.getValue(GetterAccessor.java:66) 13:01:50,189 ERROR [stderr] (Thread-123)at org.mvel2.optimizers.impl.refl.nodes.VariableAccessor.getValue(VariableAccessor.java:37) 13:01:50,189 ERROR [stderr] (Thread-123)at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:108) 13:01:50,189 ERROR [stderr] (Thread-123)at org.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:107) 13:01:50,189 ERROR [stderr] (Thread-123)at org.mvel2.ast.And.getReducedValueAccelerated(And.java:34) 13:01:50,189 ERROR [stderr] (Thread-123)at org.mvel2.MVELRuntime.execute(MVELRuntime.java:85) 13:01:50,190 ERROR [stderr] (Thread-123)at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:123) 13:01:50,190 ERROR [stderr] (Thread-123)at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:116) 13:01:50,190 ERROR [stderr] (Thread-123)at org.mvel2.MVEL.executeExpression(MVEL.java:930) 13:01:50,190 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConditionEvaluator.evaluate(MvelConditionEvaluator.java:70) 13:01:50,190 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConditionEvaluator.ensureBranchEvaluation(MvelConditionEvaluator.java:113) 13:01:50,191 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:106) 13:01:50,191 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConditionEvaluator.ensureCompleteEvaluation(MvelConditionEvaluator.java:90) 13:01:50,191 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:82) 13:01:50,191 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:214) 13:01:50,191 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConstraint.access$000(MvelConstraint.java:41) 13:01:50,192 ERROR [stderr] (Thread-123)at org.drools.rule.constraint.MvelConstraint$1.run(MvelConstraint.java:201) 13:01:50,192 ERROR [stderr] (Thread-123)at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886) 13:01:50,192 ERROR [stderr] (Thread-123)at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908) 13:01:50,192 ERROR [stderr] (Thread-123)at java.lang.Thread.run(Thread.java:662) 13:01:50,192 ERROR [stderr] (Thread-123) Caused by: java.lang.NullPointerException 13:01:50,193 ERROR [stderr] (Thread-123)at sun.reflect.GeneratedMethodAccessor121.invoke(Unknown Source) 13:01:50,193 ERROR [stderr] (Thread-123)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 13:01:50,193 ERROR [stderr] (Thread-123)at java.lang.reflect.Method.invoke(Method.java:597) 13:01:50,193 ERROR [stderr] (Thread-123)at org.mvel2.optimizers.impl.refl.nodes.GetterAccessor.getValue(GetterAccessor.java:40) 13:01:50,193 ERROR [stderr] (Thread-123)... 19 more We are using a CENTOS with Java 1.6._31 and drools 5.4. Thanks -- View this message in context: http://drools.46999.n3.nabble.com/MVEL-optimizer-error-tp4018714p4018759.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 retract events that don't match any rules (without @expires())
Is there a recommended way to remove events from working memory that don't match and can't activate any rules? For example, let's say I have two rules which should both fire when a person with name Bob is encountered. If a person with name Jim comes in he stays in working memory forever even though he doesn't match any current rules. I know @expires() for Person events would work. But I don't know what a safe time would be since I don't know ahead of time what temporal rules might be written for them. From the 5.4.0 Drools Fusion docs (Chapter 2) I found these statements: /In other words, one an event is inserted into the working memory, it is possible for the engine to find out when an event can no longer match other facts and automatically retract it, releasing its associated resources./ /Events may be automatically expired after some time in the working memory. Typically this happens when, based on the existing rules in the knowledge base, the event can no longer match and activate any rules. Although, it is possible to explicitly define when an event should expire./ Based on this statement I would expect my Jim to be automatically expired after some time. Maybe it will be and I'm just not waiting long enough. But then I found this quote from Edson: /Any object type for which there are no explicit expiration policy, nor temporal constraints from which to derive the expiration offset will have an infinite expiration offset, i.e., will never be automatically retracted./ So my question is, how can I retract events which don't match any rules? Thanks in advance for any tips or suggestsions!! - Ladd -- View this message in context: http://drools.46999.n3.nabble.com/How-to-retract-events-that-don-t-match-any-rules-without-expires-tp4018760.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] How to retract events that don't match any rules (without @expires())
If a fact is to be matched right after insertion the solution is simple: add a rule with low salience matching and retracting the fact. If you expect/hope that it matches later and you have a time limit, @expires is the answer. The interesting case is when you don't have the time limit and still hope for a match. If you have a convincing use case for that, I might be enticed to develop a solution for that ;-) -W On 18/07/2012, Ladd l...@codemettle.com wrote: Is there a recommended way to remove events from working memory that don't match and can't activate any rules? For example, let's say I have two rules which should both fire when a person with name Bob is encountered. If a person with name Jim comes in he stays in working memory forever even though he doesn't match any current rules. I know @expires() for Person events would work. But I don't know what a safe time would be since I don't know ahead of time what temporal rules might be written for them. From the 5.4.0 Drools Fusion docs (Chapter 2) I found these statements: /In other words, one an event is inserted into the working memory, it is possible for the engine to find out when an event can no longer match other facts and automatically retract it, releasing its associated resources./ /Events may be automatically expired after some time in the working memory. Typically this happens when, based on the existing rules in the knowledge base, the event can no longer match and activate any rules. Although, it is possible to explicitly define when an event should expire./ Based on this statement I would expect my Jim to be automatically expired after some time. Maybe it will be and I'm just not waiting long enough. But then I found this quote from Edson: /Any object type for which there are no explicit expiration policy, nor temporal constraints from which to derive the expiration offset will have an infinite expiration offset, i.e., will never be automatically retracted./ So my question is, how can I retract events which don't match any rules? Thanks in advance for any tips or suggestsions!! - Ladd -- View this message in context: http://drools.46999.n3.nabble.com/How-to-retract-events-that-don-t-match-any-rules-without-expires-tp4018760.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] How to retract events that don't match any rules (without @expires())
Thanks for the super fast reply W! The problem with retracting with a low salience is that my rule set is fairly dynamic. Rules come and go. And we have lots of event types and lots of fields within them to match on. Some rules may match an event immediately. Ex: when $p : Person( name == Bob ) Some may be ands, ors, etc. Ex: when $first : MyEvent( key == first ) $person : Person( name == Bob ) Some rules may be temporal with time constraints which I don't know in advance. Ex: when $first : MyEvent( key == first ) $second : MyEvent( key == second, this after [ 0s 10s ] $first ) Some may be temporal with no time constraints. Ex: when $first : MyEvent( key == first ) $second : MyEvent( key == second, this after $first ) I don't see how I can use @expires() since I don't know at compile time what the maximum temporal time limit will be. Best I could do is create one (say 1 week) and rule developers would have to live within that limit. And I can't use retract() since any event may be part of a compound rule that's waiting for the other condition(s) to be met. As for the use case with no time limit, would your workaround for the window.length(1) bug be an example? when f1 : MyEvent( key == faultType1, value == ALARM ) not MyEvent( key == faultType1, this after f1 ) f2 : MyEvent( key == faultType2, value == ALARM ) not MyEvent( key == faultType2, this after f2 ) then System.out.println( BOTH FAULTS ARE ACTIVE! ) We need to detect when multiple events are in a given state at the same time. Order doesn't matter. Time between events doesn't matter. Again, thanks for taking the time to help! - Ladd -- View this message in context: http://drools.46999.n3.nabble.com/How-to-retract-events-that-don-t-match-any-rules-without-expires-tp4018760p4018762.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] How to retract events that don't match any rules (without @expires())
If your rules are dynamic, would you still want to retract a fact not matching any of your current rules, knowing that a new rule might appear later, which would be activated by that fact? This said, the problem here is garbage-collecting facts which have been insert, but are in a zombie status, since there is no pattern matching them - not even partially. This could be a useful feature (Mario?), you could open a feature request JIRA and let the developers discuss it. For now I would suggest this: whenever you insert an object, you will get back a FactHandle. Cast it to org.drools.common.InternalFactHandle and look at getFirstLeftTuple() and getFirstRightTuple(). I haven't checked it completely, but I would say that if the fact does not participate in any tuple, it might be worthy retracting. Best Davide ps your case second after first is a well known problem... and not only for drools! If your first matches your conditions, it will have to stay there waiting for a second... You'll have to close the horizon explicitly to remove those firsts which have been there for too long, whatever that means for you :) -- View this message in context: http://drools.46999.n3.nabble.com/How-to-retract-events-that-don-t-match-any-rules-without-expires-tp4018760p4018763.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] Compiled rules differ KnowledgeAgent vs ResourceChangeScanner
I wrote a method to compile these rules using the KnowledgeBaseBeanFactory,
but the unit tests using it did not fail (i.e. did not repro the bug). Here
is my method:
public static KnowledgeBase createKnowledgeBaseUsingBeanFactory(String path)
throws Exception {
ListDroolsResourceAdapter resourceAdapters = new
ArrayListDroolsResourceAdapter();
KnowledgeBaseBeanFactory factory = new KnowledgeBaseBeanFactory();
if (path.endsWith(.drl)) {
resourceAdapters.add(new DroolsResourceAdapter(path,
ResourceType.DRL));
} else if (path.endsWith(.xls)) {
DecisionTableConfiguration dtconf =
KnowledgeBuilderFactory.newDecisionTableConfiguration();
dtconf.setInputType(DecisionTableInputType.XLS);
resourceAdapters.add(new DroolsResourceAdapter(path,
ResourceType.DTABLE,
dtconf));
} else {
throw new IllegalArgumentException(unknown knowledge base type
for path
' + path + ');
}
factory.setResources(resourceAdapters);
factory.afterPropertiesSet();
return (KnowledgeBase) factory.getObject();
}
These rules started life as an Excel spreadsheet. I have tried compiling
the spreadsheet to DRL (using DecisionTableFactory) and also, as I said
above, compiling it to PKG format, and all three versions of these rules
exhibit the problem behavior (I thought the pkg format worked, but for my QA
testers the pkg file exhibited the bug: it did not load properly at server
start time (via Spring) but did load correctly on hot deploy (via Change
Scanner).
Short of completely starting over with the spreadsheet I don't know what
else to try. I did scan the DRL for non-printable characters, in case Excel
was creating something strange, but the only invisible characters I saw
were CRLF and Tabs, which are normal in DRL.
I'll attach the DRL version of the rules here in case anyone can spot
something questionable with it.
http://drools.46999.n3.nabble.com/file/n4018764/documentListTable.drl
documentListTable.drl
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Re: [rules-users] How to retract events that don't match any rules (without @expires())
Davide Sottara wrote If your rules are dynamic, would you still want to retract a fact not matching any of your current rules, knowing that a new rule might appear later, which would be activated by that fact? That's a good question. Smaller memory footprint by retracting. But we lose the immediate activation of future rules. Maybe I'll make it an option and let somebody else decide. ;) Davide Sottara wrote For now I would suggest this: whenever you insert an object, you will get back a FactHandle. Cast it to org.drools.common.InternalFactHandle and look at getFirstLeftTuple() and getFirstRightTuple(). I haven't checked it completely, but I would say that if the fact does not participate in any tuple, it might be worthy retracting. That's great info!! Worked like a charm. Once again, thanks guys! You've been extremely helpful. - Ladd -- View this message in context: http://drools.46999.n3.nabble.com/How-to-retract-events-that-don-t-match-any-rules-without-expires-tp4018760p4018765.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
