Hi, I am a newbie to DROOLs. I want to cross check with you for any potential issues that you see about my DROOLs usage. I have a requirement to create multiple DRLs that use the same namespace. Hence, I am adding rules from DRL1, DRL2, DRL3 to a package named "com.myproj.pkg". And at some point I am removing rules of DRL1 from the knowledge package leaving rest of the rules.

When all the rules from the package are removed, then I am removing the knowledge package.

This is all done with StatefulSession. So my rules removal code looks like this: String pkgName = kpkg.getName(); Collection<Rule> rules = kpkg.getRules(); for(Rule rule : rules) { knowledgeBase.removeRule(pkgName, rule.getName()); } KnowledgePackage pkgAfterRemove = knowledgeBase.getKnowledgePackage(pkgName); Collection<Rule> rulesAfterCleanup = pkgAfterRemove.getRules() if(rulesAfterCleanup == null || rulesAfterCleanup.isEmpty()) { knowledgeBase.removeKnowledgePackage(pkgName); } I tested this logic and it works fine but does anyone see any side effects of such logic?

I did a short search in the forum and couldnt find any similar posts. Thanks a bunch, Rajee -- View this message in context: http://drools.46999.n3.nabble.com/Rules-from-Multiple-DRLs-use-the-same-n... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Thanks Laune for the response. I am sorry for not providing enough information. I didnt know if I am explaining it enough in DROOLs context. I might still miss some information, I am sorry for that and thanks for your time trying to help me. This is my scenario. My knowledgebase has bunch of rules from different name spaces and it works fine. but in one specific use case (which I am implementing now), I have to dynamically add/remove rules to/from a single namespace. for example, at onetime I get a DRL with a set of rules that compile to the namespace com.mypkg. and in another time I get another DRL with a different set of rules which also compile to the namespace com.mypkg. and there is no limit for the number of such DRLs with different sets of rules that compile to the same namespace com.mypkg. also at some point I have to remove such a DRL, which means I will be removing the rules defined in the DRL from the knowledge package. these addition/deletion scenarios never end. So my questions are as below: 1. is there any side effect to using the same package name in mutliple DRLs, which ultimately results in dynamically adding/removing of part of rules from a knowledge package ? 2. Is there any reason why you would think using unique package name per DRL is beneficial compared to the above ? I agree with you, I dont see a reason why I have to remove the knowledge package after all the rules have gone. May be I dont have to do that. but does it matter even if I remove it ? yes the remaining knowledge base is still good for other sessions. Thanks again Laune. -- View this message in context: http://drools.46999.n3.nabble.com/Rules-from-Multiple-DRLs-use-the-same-n... Sent from the Drools: User forum mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users