July 2011 - rules-users - Jboss List Archives

by dan.dobrescu

Hi, I've searched the forum, but I couldn't find nothing useful about my question.. I've got a little problem.. So, I've implemented in Drools some rules, mostly triggered by two external events... EVENTA, and EVENTB. My applications is clustered, so it's possible that EVENTA is inserted from NODE1 and EVENTB from NODE2. But in this case, I'll have different facts in both sessions, and it's possible that my rules don't fire. Has drools implemented clustering for statefull sessions? or how should I do, because if both session are containing the same facts, the rules will be triggered twice... I'd like a behavior similar to Quartz.. -- View this message in context: http://drools.46999.n3.nabble.com/Drools-Clustering-tp3140305p3140305.html Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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org.hibernate.exception.LockAcquisitionException: could not delete:

by Jose

Hi All, When i tried to execute the rule in multi threaded environment, i got the below mentioned Error logs... I just tried to execute the rule flow with 2 thread, always 1 got executed successfully and one fails with the following error log. ERROR LOG: Hibernate: delete from ProcessInstanceInfo where InstanceId=? and OPTLOCK=? Hibernate: delete from ProcessInstanceInfo where InstanceId=? and OPTLOCK=? 2011/07/04 11:20:06.475{UTC} [JDBCExceptionReporter : JDBCExceptionReporter.java: logExceptions: 100] [RMI TCP Connection(6)-10.50.53.32]: WARN: : SQL Error: 60, SQLState: 61000 2011/07/04 11:20:06.475{UTC} [JDBCExceptionReporter : JDBCExceptionReporter.java: logExceptions: 101] [RMI TCP Connection(6)-10.50.53.32]: ERROR: : ORA-00060: deadlock detected while waiting for resource 2011/07/04 11:20:06.475{UTC} [AbstractFlushingEventListener : AbstractFlushingEventListener.java: performExecutions: 324] [RMI TCP Connection(6)-10.50.53.32]: ERROR: : Could not synchronize database state with session org.hibernate.exception.LockAcquisitionException: could not delete: [org.drools.persistence.processinstance.ProcessInstanceInfo#8130] at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:112)...... Thanks, Jose. -- View this message in context: http://drools.46999.n3.nabble.com/org-hibernate-exception-LockAcquisition... Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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check whether a key is present in global Map, i.e. mimicking containsKey() behavior

by esstrata

Hello, I'm using Drools 5.1.1 in a JavaSE 6 project. I can't get running a rule where a value obtained from WM is check for existence as a key of a global Map. I have a map of the type ProductTextCode -> Product, where keys are String and values Product /global Map productMap/ Then in a rule a I want a condition where each String in WM is tested against map keyset. / rule "Product ID not in products map" dialect "mvel" when $pid : String() => Here goes the condition <= then System.out.println("Invalid product id: " + $pid) retract ($pid) end / So far I've tried with productMap.containsKey($pid) but a get a MVEL error as it takes 'containsKey' as a property. Please help. Thank you. -- View this message in context: http://drools.46999.n3.nabble.com/check-whether-a-key-is-present-in-globa... Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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Guvnor errors stay forever

by Justin Case

Hi all, Here's a funny thing I experience: I declare a function and do the mistake of verifying it before editing anything, while it's still a template (so it has chevrons). The verify obviously fails - but with a HTTP error 500! Server crashed?? Indeed I can see in the console: at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951) [:6.0.0.Final] at java.lang.Thread.run(Thread.java:619) [:1.6.0_12] Caused by: java.lang.RuntimeException: Verifier Errors: [ERR 102] Line 1:9 mismatched input '<' in function [ERR 102] Line 1:36 mismatched input '<' in function "calculateAge" [ERR 102] Line 1:46 mismatched input '>' in function "calculateAge" Parser returned a null Package I see quite a few JIRAs about incomplete exception handling - GUVNOR-741, GUVNOR-690, GUVNOR-536, should I add the above to any of them? Whatever, an error is an error, but here comes the real problem: After the above I come to realize that each analysis of a package keeps adding the results of the previous ones, so the Errors/Warnings list just grows and grows. An old error will always come again even though the item it refers to is not even existing anymore (so I cannot analyse/verify anything reliably). I renamed the above function, I edited it so it doesn't have the chevrons, its code can be validated fine, but nevertheless Guvnor keeps throwing the same error 500 and the JBoss console keeps complaining about the oooold function calculateAge and its chevrons each time I verify or analyse. And it does that by repeating the message for each retry once more. Either the error list is not cleaned after the verify, or some artifacts live too long. Logout and relogon keeps the list, but restarting JBoss solves the problem. . I really have the feeling GUVNOR-1499 has the same underlying problem... For the record: I'm on 5.2.0.Final on JBoss 6, Java 6 on Windows XP. Thank you very much, JC

14 years, 10 months

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Retrieving Enumerated List from Drools

by lansyj

Hi, We have a custom CMS which we use to manage content like banner images, and other personalization content. We would be using Drools to define user segments and would be associating a unique code and short name to it - code for the system and short name for the business users. Now, is there a way for our custom CMS to be able to retrieve the enumerated list (basically all possible values of that data element) such that it can be used for mapping content in the CMS? Any tip would be helpful. Best Regards -lj -- View this message in context: http://drools.46999.n3.nabble.com/Retrieving-Enumerated-List-from-Drools-... Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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Using Enumeration for long lists

by lansyj

Hi, We are planning to use Drools for a Blacklist validation logic which requires us to manage very long list (could be tens of thousands of IDs). Can we use the native Drools enumeration for this? Would this be an optimal implementation? The other option we were thinking of was to have a list managed separately in our core application and have in lucene indexed such that Drools rule checks against the index. But, as you can see, it creates a lot of development as well as maintenance overhead. Thanks in advance for any tips on this topic. Best Regard -lj -- View this message in context: http://drools.46999.n3.nabble.com/Using-Enumeration-for-long-lists-tp3140... Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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Userv Product Derby drools implementation

by Wishing Carebear

Hello, Is there a Drools implementation for the UServ Product Derby usecase. http://hydrogen.informatik.tu-cottbus.de/wiki/index.php/Using_Drools:_USe... Thanks, cabear

14 years, 10 months

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delegate a task

by damon

Hi, I call MinaTaskClient's delegate() method to delegate a task to another user, I found the state of the task is translate to '*Ready*', instead of '*Reserved*'. But from the 'Web Services Human Task Version 1.0' specification, The state will be translate to 'Reserved' when do delegate -- "A task can be delegated when it is in an active state (Ready, Reserved, InProgress), and transitions the task into the Reserved state" Is there any wrong when I call delegate() method? Or any precondition when call delegate() method, then the state will be translate to 'Reserved', instead of 'Ready'? Thanks Damon -- View this message in context: http://drools.46999.n3.nabble.com/delegate-a-task-tp3137901p3137901.html Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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Drools with Spring - Need Help

by anilkapoor

my spring config file is: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:util="http://www.springframework.org/schema/util" xmlns:drools="http://drools.org/schema/drools-spring" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd http://drools.org/schema/drools-spring http://drools.org/schema/drools-spring.xsd http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util-3.0.xsd"> <drools:kbase id="kBase"> <drools:resources> <drools:resource type="DRL" source="classpath:META-INF/rules/myproject-rules.drl" /> </drools:resources> </drools:kbase> <drools:ksession id="kSession" type="stateful" kbase="kBase"></drools:ksession> </beans> rule is: import..... global EligibilityResult eligibilityResult; rule "Customer State Check - ACTIVATED" when SeHolder(seHolderState.state == "ACT") then eligibilityResult = new EligibilityResult(); eligibilityResult.setEligible(true); insert(eligibilityResult); end java code @Resource StatefulKnowledgeSession kSession; @Override public SeHolder checkCustomerEligible(String seId) { EligibilityResult eligibilityResult = new EligibilityResult(); SeHolder seHolder = new SeHolder();//seHolderManagement.getSEHolder(seId); seHolder.setId("test0002"); seHolder.setSeHolderState(SeHolderState.SUSPENDED); kSession.insert(seHolder); kSession.fireAllRules(); Object objs[]= kSession.getObjects().toArray(); for (int i = 0; i < objs.length; i++) { eligibilityResult = (EligibilityResult) ((objs[i] instanceof EligibilityResult)?objs[i]:null); } System.out.println("----- EligibilityResult ----- " + eligibilityResult.isEligible()); kSession.dispose(); return seHolder; } NOW MY QUESTION IS THAT I AM GETTING THE EligibilityResult LIKE SHOWN IN ABOVE CODE.. CAN ANYBODY TELL ME IS THERE ANY OTHER SUFFICIENT WAY SO THAT I CAN GET IT BY NAME OR SOME OTHER WAY. -- View this message in context: http://drools.46999.n3.nabble.com/Drools-with-Spring-Need-Help-tp3115948p... Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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drools - packaging creates a full snapshot...why?

by jcrowe

I have been using drools for almost a year now and build several packages a day. Things are starting to slow down a bit and I've started to wonder if it is because of all the workspace copies and the jcr overhead of them. I have implemented a deletion of old workspace copies but this made me wonder why drools is doing (in RulesRepository): this.session.getWorkspace().copy( source, newName ); its not like i need a copy, once the package is built, it doesn't seem to 'rebuild it' from this snapshot. I have no way of "recovering to" this snapshot. Anyone can help me with the reason behind the copy (perhaps why I shouldn't just delete this copy? I'm sure there are side-effects of this I'm not thinking of, etc., etc.,) Any feedback is appreciated. -- View this message in context: http://drools.46999.n3.nabble.com/drools-packaging-creates-a-full-snapsho... Sent from the Drools: User forum mailing list archive at Nabble.com.

14 years, 10 months

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rules-users July 2011