February 2010 - rules-users - Jboss List Archives

StatefulKnowledgeSession synchronization problem

by heldeen

Hello, Using Drools 5.1.0.M1. I am running into a blocking problem when I concurrently try to update a fact in my knowledge session, which is fireUntilHalt() in its own thread, from another thread, an updator thread. I know that only these 2 threads are ever accessing each knowledge session. Has anyone else run into this problem? I am including the relavant details and can provide a working example if need be. The block happens randomly anywhere from 20 - 1000's of sessions. I consistantly get this stack trace from the blocked thread: org.drools.common.AbstractWorkingMemory.executeQueuedActions(AbstractWorkingMemory.java:1540) org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1529) org.drools.common.AbstractWorkingMemory.update(AbstractWorkingMemory.java:1403) org.drools.impl.StatefulKnowledgeSessionImpl.update(StatefulKnowledgeSessionImpl.java:248) ... I have a simple drools knowledge base that is a basic rule flow [Start -> Rule Flow Group -> Event Wait -> Rule Flow Group -> End] I build a knowledge base like this: KnowledgeBaseConfiguration knowledgeBaseConfiguration = KnowledgeBaseFactory.newKnowledgeBaseConfiguration(); knowledgeBaseConfiguration.setOption(AssertBehaviorOption.EQUALITY); knowledgeBaseConfiguration.setOption(MBeansOption.ENABLED); KnowledgeBase knowledgeBase = KnowledgeBaseFactory.newKnowledgeBase(knowledgeBaseConfiguration); KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder(); kbuilder.add(ResourceFactory.newClassPathResource(CHANGE_SET_XML, getClass()), ResourceType.CHANGE_SET); if (kbuilder.hasErrors()) { throw new IllegalArgumentException("Unable to build knowledge"); } knowledgeBase.addKnowledgePackages(kbuilder.getKnowledgePackages()); My basic test fact is: public class Fact() { String name; boolean isReady; //getters and setters } I have a fixed thread pool (Sun's ExecutorService.newFixedThreadPool() with 20 threads). Each session is submitted from a for loop of 0 to 100000 where it generates a simple fact with Fact.name = "fact"+i and Fact.isReady = false, then puts it in an array like so: final Object[] facts... fixedPoolExecutor.submit(new Runnable() { @Override public void run() { StatefulKnowledgeSession knowledgeSession = null; try { knowledgeSession = knowledgeBase.newStatefulKnowledgeSession(); //put it in a ConcurrentHashMap keyed by session id. ... for (Object fact : facts) { knowledgeSession.insert(fact); } //add session completion halt event - omiting other unused methods knowledgeSession.addEventListener(new ProcessEventListener() { @Override public void afterProcessCompleted(ProcessCompletedEvent event) { knowledgeSession.halt(); } }); knowledgeSession.startProcess(PROCESS_ID); knowledgeSession.fireUntilHalt(); } finally { if (knowledgeSession != null) { knowledgeSession.dispose(); } } }); I have a single thread executor (Sun's ExecutorService.newSingleThreadExecutor()) that is used to update these sessions (basically set the Fact.isReady from false to true for the EventWait in my rule flow): final int sessionId... final Object[] facts... singleThreadExecutor.submit(new Runnable() { @Override public void run() { StatefulKnowledgeSession knowledgeSession = null; try { knowledgeSession = ... from ConcurrentHashMap based on sessionId FactHandle factHandle = knowledgeSession.getFactHandle(fact); if (null != factHandle) { knowledgeSession.update(factHandle, fact);//This is where it blocks and never returns } else { knowledgeSession.insert(fact); } }); -Heath -- View this message in context: http://n3.nabble.com/StatefulKnowledgeSession-synchronization-problem-tp1... Sent from the Drools - User mailing list archive at Nabble.com.

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Re: [rules-users] rules-users Digest, Vol 39, Issue 30

by Régis Ramillien

Hello, It works well for me without doing anything special. Perhaps the problem comes from your rules? Have you assigned variables to your facts ? Can you paste a example of a rule ? 2010/2/11 <rules-users-request(a)lists.jboss.org> > Send rules-users mailing list submissions to > rules-users(a)lists.jboss.org > > To subscribe or unsubscribe via the World Wide Web, visit > https://lists.jboss.org/mailman/listinfo/rules-users > or, via email, send a message with subject or body 'help' to > rules-users-request(a)lists.jboss.org > > You can reach the person managing the list at > rules-users-owner(a)lists.jboss.org > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of rules-users digest..." > > > Today's Topics: > > 1. drools execution server (Kessler Bortoluzzi, Mariana) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Thu, 11 Feb 2010 10:01:07 +0100 > From: "Kessler Bortoluzzi, Mariana" <MKB(a)compugroup.com> > Subject: [rules-users] drools execution server > To: <rules-users(a)lists.jboss.org> > Message-ID: > <7E4DCDD4DFDF9545B2676F6CDD8EC39C04B9470C(a)smxko5.koblenz.cg.local> > Content-Type: text/plain; charset="us-ascii" > > Hello everyone, > > > > I am trying to use the drools execution server, and was able to post XML > requests to it and get an XML answer, but I could not change the > inOutFacts using my rules. > > Except for the "Execution Server is running" page, I didn't find any > documentation about it. > > Is there any other documentation available? > > > > Mariana > > > > -------------- next part -------------- > An HTML attachment was scrubbed... > URL: > http://lists.jboss.org/pipermail/rules-users/attachments/20100211/d7b8800... > > ------------------------------ > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > > End of rules-users Digest, Vol 39, Issue 30 > ******************************************* >

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CEP Rule question

by Glenn Macgregor

Hi All, Thanks for all the help so far I could not have gotten this far this fast without it. I have a couple questions regarding windows, accumulate and CEP. * Is this a valid rule: $param : Parameter(name == "testParam") $uEvent : ParameterUpdateEvent(name == $param.name, $value : value) over window:length(5) from entry-point "EPOne" The above rule compiles and runs but the issue is I see: OBJECT RETRACTED value:ie.pk.SystemsManagement.Alerting.ParameterUpdateEvent@19ea173 factId: 6 After inserting each event, I would think the length window would fill up before any are retracted. * Is there anyway to tell if a window is full, I don't want to hit the consequence if the window is not yet full. * Is there a way to name windows, my use case is as follows: o Drools application is reading updates from an ActiveMQ bus and turning them into ParamUpdateEvents and inserting each event into EPOne o Each of these parameter updates contains one param value, so I could get an update for param1 then an update for param2... o Is it possible to have one rule which would sum the last 5 values of param1 and sum the last 5 values of param2. I can only get it to sum the last 5 updates without regard for wich param it is I hope this somewhat clear. Thanks for you help. Glenn

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Category Rules - Guvnor

by Amit Kumar

Hi Folks, I am looking at the category rules and have a scenario to use it. Goes like this Person Name String City String income int I want to categorize the rules in states -US -- NewYork -- Seatle -- SanFrancisco I have created 3 rules rule "people living in NY" when Person(city="NewYork" then end rule "people living in Seatle" when Person(city="Seatle" then end rule "people living in SFO" when Person(city="SanFrancisco" then end I associated the above rules with appropriate categories Then I create tax rules rule "ny tax" -- category "NewYork" when Person() then Log .. Tax = 10% end rule "WA tax" -- category "Seatle" when Person() then Log .. Tax = 20% end rule "ny tax" -- category "NewYork" when Person() then Log .. Tax = 10% end When I create a object in test scenario of person type .. then all the rules get executed.. The category rule is not having any effect Is there any documentation on how this works?? Thanks Amit

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drools execution server

by Kessler Bortoluzzi, Mariana

Hello everyone, I am trying to use the drools execution server, and was able to post XML requests to it and get an XML answer, but I could not change the inOutFacts using my rules. Except for the "Execution Server is running" page, I didn't find any documentation about it. Is there any other documentation available? Mariana

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Re: [rules-users] CEP Error

by Glenn Macgregor

Hi Nicolas, Thanks for the response. The strange thing is I do not get this error when I run inside the debugger with the same facts. This made me believe it is a timing issue. I am using the latest stable drools - 5.0.1 Thanks Glenn ________________________________ From: rules-users-bounces(a)lists.jboss.org To: Rules Users List Sent: Wed Feb 10 18:18:57 2010 Subject: Re: [rules-users] CEP Error Hi, It says that the $param is null so $param.name<http://param.name>() cannot be called regards Nicolas 2010/2/10 Glenn Macgregor <gmacgregor(a)pocketkings.ie<mailto:gmacgregor@pocketkings.ie>> Hi All, I have a simple CEP test case which I am working through. I am currently getting a NullPointerException in the Consequence and have no idea why. Rule: rule "Param Update Event Rule" when $pue : ParameterUpdateEvent(name == "testParam2", $param : param) from entry-point "ParamUpdateStream" then #System.out.println("Param '" + $pue.getName() + "' has been updated to " + $pue.getValue()); System.out.println("HERE!!! " + $param + " " + $param.name<http://param.name>()); End Exception & Debug: OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109 factId: 2 OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109 factId: 2 OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7d factId: 3 OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7d factId: 3 ACTIVATION CREATED rule:Param Update Event Rule activationId:Param Update Event Rule [4, 0] declarations: $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4); $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4) Exception in thread "Thread-3" BEFORE ACTIVATION FIRED rule:Param Update Event Rule activationId:Param Update Event Rule [4, 0] declarations: $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4); $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4) OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748 factId: 4 OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748 factId: -1 org.drools.runtime.rule.ConsequenceException: java.lang.NullPointerException at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:943) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:885) at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1065) at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:701) at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:678) at org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:195) at ie.PocketKings.SystemsManagement.Alerting.SessionRunner.run(SessionRunner.java:13) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at org.drools.base.ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent6011238$getParam.getValue(Unknown Source) at org.drools.base.ClassFieldReader.getValue(ClassFieldReader.java:91) at org.drools.rule.Declaration.getValue(Declaration.java:244) at ie.PocketKings.SystemsManagement.Alerting.Rule_Param_Update_Event_Rule_0ConsequenceInvoker.evaluate(Rule_Param_Update_Event_Rule_0ConsequenceInvoker.java:16) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:934) ... 7 more OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19fdbcb factId: 5 Could it be that my Event object is getting destroyed before the consequence is run, is that what “OBJECT RETRACKED” means in this case? Thanks Glenn _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org<mailto:rules-users@lists.jboss.org> https://lists.jboss.org/mailman/listinfo/rules-users

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CEP Error

by Glenn Macgregor

Hi All, I have a simple CEP test case which I am working through. I am currently getting a NullPointerException in the Consequence and have no idea why. Rule: rule "Param Update Event Rule" when $pue : ParameterUpdateEvent(name == "testParam2", $param : param) from entry-point "ParamUpdateStream" then #System.out.println("Param '" + $pue.getName() + "' has been updated to " + $pue.getValue()); System.out.println("HERE!!! " + $param + " " + $param.name()); End Exception & Debug: OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109 factId: 2 OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@1265109 factId: 2 OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7d factId: 3 OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@5e8d7d factId: 3 ACTIVATION CREATED rule:Param Update Event Rule activationId:Param Update Event Rule [4, 0] declarations: $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4); $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4) Exception in thread "Thread-3" BEFORE ACTIVATION FIRED rule:Param Update Event Rule activationId:Param Update Event Rule [4, 0] declarations: $pue=ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748(4); $param=ie.PocketKings.SystemsManagement.Alerting.Parameter@2431b9(4) OBJECT RETRACTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748 factId: 4 OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19b4748 factId: -1 org.drools.runtime.rule.ConsequenceException: java.lang.NullPointerException at org.drools.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:23) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:943) at org.drools.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:885) at org.drools.common.DefaultAgenda.fireUntilHalt(DefaultAgenda.java:1065) at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:701) at org.drools.common.AbstractWorkingMemory.fireUntilHalt(AbstractWorkingMemory.java:678) at org.drools.impl.StatefulKnowledgeSessionImpl.fireUntilHalt(StatefulKnowledgeSessionImpl.java:195) at ie.PocketKings.SystemsManagement.Alerting.SessionRunner.run(SessionRunner.java:13) at java.lang.Thread.run(Unknown Source) Caused by: java.lang.NullPointerException at org.drools.base.ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent6011238$getParam.getValue(Unknown Source) at org.drools.base.ClassFieldReader.getValue(ClassFieldReader.java:91) at org.drools.rule.Declaration.getValue(Declaration.java:244) at ie.PocketKings.SystemsManagement.Alerting.Rule_Param_Update_Event_Rule_0ConsequenceInvoker.evaluate(Rule_Param_Update_Event_Rule_0ConsequenceInvoker.java:16) at org.drools.common.DefaultAgenda.fireActivation(DefaultAgenda.java:934) ... 7 more OBJECT ASSERTED value:ie.PocketKings.SystemsManagement.Alerting.ParameterUpdateEvent@19fdbcb factId: 5 Could it be that my Event object is getting destroyed before the consequence is run, is that what "OBJECT RETRACKED" means in this case? Thanks Glenn

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can i use Persistence with Drools

by KiranP

i have a simple workflow application which has around 3-4 wait states which may even take days to complete and the server is also un-stable hence so when i run a ruleflow i there a way to persist its state and if it is there does that state allow me to reload all process states (if more than one than also) to there last form if so please somebody give me some sample code for it i have tried one given by salaboy at : http://blog.athico.com/2009/09/drools-flow-variable-persistence.html but i am still confused so please help..... thanks in advance -- View this message in context: http://n3.nabble.com/can-i-use-Persistence-with-Drools-tp197789p197789.html Sent from the Drools - User mailing list archive at Nabble.com.

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Reading DRL file with large number of rules

by kpowerinfinity

Hello, We are trying to run a DRL file that has more than 20K rules, all of which have the simple form: rule "testpeoplenumber" salience 100 dialect "mvel" when LineItem( inventoryItemCode == "8903210392090") then InventoryItem fact0 = new InventoryItem(); fact0.setCategoryCode( "ONPROMO" ); insert(fact0 ); end However, the rule file is not getting parsed by the builder, and either takes a very long time (well over half an hour), or gives a Heap Overflow exception. We tried with a smaller file (about 1K rules, and the situation is the same). The parsing code is: org.drools.KnowledgeBaseConfiguration kbc = org.drools.KnowledgeBaseFactory.newKnowledgeBaseConfiguration(null, cl); org.drools.KnowledgeBase kbase = org.drools.KnowledgeBaseFactory.newKnowledgeBase(kbc); org.drools.builder.KnowledgeBuilderConfiguration knowledgeBuilderConfig = org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration(null, cl); org.drools.builder.KnowledgeBuilder builder = org.drools.builder.KnowledgeBuilderFactory.newKnowledgeBuilder(kbase, knowledgeBuilderConfig); org.drools.builder.impl.KnowledgeBuilderImpl builderImpl = builder as org.drools.builder.impl.KnowledgeBuilderImpl; builder.add(org.drools.io.ResourceFactory.newFileResource(filename), org.drools.builder.ResourceType.DRL); We are using Drools v5. We've tried both with the java jar as well as in .NET (using IKVM to compile it). Any help in understanding why this is happening and how it can be avoided will be appreciated. Warm Regards Krishna. -- http://kpowerinfinity.wordpress.com http://www.linkedin.com/in/kpowerinfinity

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Re: [rules-users] [planner] Questions about employee shift rostering example

by Geoffrey De Smet

[CC'd to the user list] Hi Samuel, > Happy new year and all the best for you and your family. Happy new year too :) > As you can see below, I tried posting a message on the mailing list but > unfortunately I am not authorized. If that doesn't work out (it should!), try the nabble.com forum or the gmane.org newsgroup: http://n3.nabble.com/Drools-User-f47000.html I use gmane.org myself from Thunderbird. > Geoffrey, I saw a paper on the trunk of drools planner where you address > the issue about employee shift rostering. > There is no source, I don't know what level of thinking you're in, but I > have two questions: > I haven't made an example of employee shift rostering (or bin packaging or vehicle routing) yet. Employee shift rostering is closely related too curriculum course scheduling, so I advice to get to know the curriculum course example inside and out :) Drools (Planner) is kinda like JPA: you can model your domain pretty much how you like, but how you model your domain can impact the complexity of your rules (~ JPA-QL's). Don't make your domain too smart to help your first rules, because it will strangle rules (and even moves) you implement later. Keep your domain on low level details. > "Each shift has for each specialism a minimal staff size" > how do you manage the team size ? > Is there a list of people in the Shift object ? Or an accumulate function > in the rule ? > I'd say: experiment with both and let me know which works best :) Until now, I 've always gone for the "accumulate function in a rule" manner. I strongly believe in keeping the domain diagram very simple: http://beta.parleys.com/#id=1714&st=5&sl=14 So only one "red class". Only one class that the moves change, only one class that you need to tell the working memory that has changed. I believe (and I think I 've seen) that this improves delta based score calculation. The problem is that some rules, require to check the sum of thing and you need an accumulate, like this rule in examinationScoreRules.drl: rule "roomCapacityTooSmall" // TODO improve performance, as it takes 50% of the performance when $period : Period(); $room : Room($capacity : capacity); $totalStudentSize : Number(intValue > $capacity) from accumulate( Exam(period == $period, room == $room, $studentSize : topicStudentSize), sum($studentSize) // Vote for http://jira.jboss.com/jira/browse/JBRULES-1075 ); ... And Drools 5.0's forward chaining becomes backward chaining once you do this. Forward chaining = delta based score calculation. Backward chaining = NO delta based score calculation. The answer is "true modify", which mark is working on, but probably won't make 5.1 I fear. http://blog.athico.com/2010/01/rete-and-true-modify.html https://jira.jboss.org/jira/browse/JBRULES-2240 Despite that, I still go for "accumulate function in a rule" each time and take the performance hit. Meanwhile I poke Mark :) Remember: StartingSolutionInitializer and relativeSelection/absoluteSelection bring far greater peformance rewards. The "a list of people in the Shift object" approach might be better untill "true modify"'s been solved, but I believe it hurts your design in the long run. But do experiment with both approaches, I 'd love to get some feed-back on this. > "minimal 35 hours rest each week" > How do you check that constraint ? Is there a week object that you parse to > check that there are 2 consecutive days each week? Or is that the generated > movements already meet this hard constraint ? > How do you define a week? From monday to monday or any 7 days in a row? In either case, just search for a pattern where that does _not_ happen. It does depend on how you modeled your domain, I 'd have to see the code in detail. Take a look at this rule: // CurriculumCompactness: Lectures belonging to a curriculum should be adjacent // to each other (i.e., in consecutive periods). // For a given curriculum we account for a violation every time there is one lecture not adjacent // to any other lecture within the same day. // Each isolated lecture in a curriculum counts as 2 points of penalty. rule "curriculumCompactness" when $curriculum : Curriculum(); $lecture : Lecture(curriculumList contains $curriculum, $day : day, $timeslotIndex : timeslotIndex ); not Lecture(curriculumList contains $curriculum, day == $day, timeslotIndex == ($timeslotIndex - 1) ); not Lecture(curriculumList contains $curriculum, day == $day, timeslotIndex == ($timeslotIndex + 1) ); then insertLogical(new IntConstraintOccurrence("curriculumCompactness", ConstraintType.NEGATIVE_SOFT, 2, $lecture, $curriculum)); end PS: next week I 'll be presenting Drools Planner in a Lille JUG. With kind regards, Geoffrey De Smet Samuel Deballon schreef: > Hello Geoffrey, > > Happy new year and all the best for you and your family. > > As you can see below, I tried posting a message on the mailing list but > unfortunately I am not authorized. > > I sent an email to the administrator, but until you can answer questions in > the email below. > > Note : I'll post the discussion once I have access. > Do not worry I understand if you do not respond (I have not forgotten the > remarks in your previous mail) > > If my questions aren't specific enough, let me know. > > In any case, thank you in advance for your response.. > > With kind regards, > > Samuel Deballon > > CSC • This is a PRIVATE message. If you are not the intended recipient, > please delete without copying and kindly advise us by e-mail of the mistake > in delivery. NOTE: Regardless of content, this e-mail shall not operate to > bind CSC to any order or other contract unless pursuant to explicit written > agreement or government initiative expressly permitting the use of e-mail > for such purpose • CSC Computer Sciences SAS • Registered Office: Immeuble > Le Balzac, 10 Place des Vosges, 92072 Paris La Défense Cedex, France • > Registered in France: RCS Nanterre B 315 268 664 > ----- Forwarded by Samuel Deballon/FRA/CSC on 14/01/2010 16:30 ----- > |------------> > | From: | > |------------> > >--------------------------------------------------------------------------------------------------------------------------------------------------| > |rules-users-owner(a)lists.jboss.org | > >--------------------------------------------------------------------------------------------------------------------------------------------------| > |------------> > | To: | > |------------> > >--------------------------------------------------------------------------------------------------------------------------------------------------| > |Samuel Deballon/FRA/CSC@CSC | > >--------------------------------------------------------------------------------------------------------------------------------------------------| > |------------> > | Date: | > |------------> > >--------------------------------------------------------------------------------------------------------------------------------------------------| > |14/01/2010 10:24 | > >--------------------------------------------------------------------------------------------------------------------------------------------------| > |------------> > | Subject: | > |------------> > >--------------------------------------------------------------------------------------------------------------------------------------------------| > |[Drools-planner] : Questions about employee shift rostering example | > >--------------------------------------------------------------------------------------------------------------------------------------------------| > > > > > > You are not allowed to post to this mailing list, and your message has > been automatically rejected. If you think that your messages are > being rejected in error, contact the mailing list owner at > rules-users-owner(a)lists.jboss.org. > > > ----- Message from Samuel Deballon <sdeballon(a)csc.com> on Thu, 14 Jan 2010 > 10:26:06 +0100 ----- > > To: rules-users(a)lists.jboss.org > > Subject: [Drools-planner] : Questions about employee shift > rostering example > > > > Hi all, Hi Geoffrey, > > Geoffrey, I saw a paper on the trunk of drools planner where you address > the issue about employee shift rostering. > There is no source, I don't know what level of thinking you're in, but I > have two questions: > > "Each shift has for each specialism a minimal staff size" > how do you manage the team size ? > Is there a list of people in the Shift object ? Or an accumulate function > in the rule ? > > "minimal 35 hours rest each week" > How do you check that constraint ? Is there a week object that you parse to > check that there are 2 consecutive days each week? Or is that the generated > movements already meet this hard constraint ? > > Thanks in advance for your answer, > > Samuel > > > CSC • This is a PRIVATE message. If you are not the intended recipient, > please delete without copying and kindly advise us by e-mail of the mistake > in delivery. NOTE: Regardless of content, this e-mail shall not operate to > bind CSC to any order or other contract unless pursuant to explicit written > agreement or government initiative expressly permitting the use of e-mail > for such purpose • CSC Computer Sciences SAS • Registered Office: Immeuble > Le Balzac, 10 Place des Vosges, 92072 Paris La Défense Cedex, France • > Registered in France: RCS Nanterre B 315 268 664 > >

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rules-users February 2010