Re: [rules-dev] Knowledge Composition and Parts

Hi, To load a resource from DB would someone need to provide a custom implementation of Resource (meant for DB lookup) and then use it in the KnowledgeBuilder? Can this definition be later extended to load a resource from a repository once repository concept is there during execution time (similar / same as what is available at definition time)?

Should resource configuration at Resource level (part) or at KnowledgeBuilder? As per my understanding of the definition below, it seems more apt at KnowledgeBuilder level.

Regards, - Nimesh -----Original Message----- From: rules-dev-bounces(a)lists.jboss.org [mailto:rules-dev-bounces@lists.jboss.org] On Behalf Of Mark Proctor Sent: Thursday, November 27, 2008 12:01 PM To: Rules Dev List Subject: [rules-dev] Knowledge Composition and Parts I'm in the process of doing the final changes to drools-api. Having done the spring work, not yet committed, I liked their resource framework, so decided to copy this for Drools. So we now have: KnowledgeBuilder.add( Resource, KnowledgeType, ResourceConfiguration ); Where we support the following Resource sources: FileSystemResource, ClassPathResource, UrlResource ByteArrayResource, ReaderResource, EncodedResource and InputStreamResource In use it'll look like: kbuilder.add( ResourceFactory.newClassPathResource( "somefile.drl", classLoader ), KnowledgeType.DRL ) I do not yet do knowledge type inference from the .ext - I think I'll leave that till after 5.0, if I do it at all. So kbuilder.addResource( URL, ...) and kbuilder.addResource( Reader, ... ) from M3 no longer exist and are as above. What I'm adding now is the ability to provide an xml file that is a configuration of resources to load. The term Configuration is overloaded, and we use this more to provide the directives for knowledgebuilder and knowledgebase. So I was thinking Composition and Part - for Knowledge Composition and Knowledge Part, from dictionary.com on "composition": "the act of combining parts or elements to form a whole." "the composition of "aircraft" from "air" and "craft." My reasoning for this is a composition will contain rules, processes, decision tables, dsls etc. "The KnowlegeBase is a composition of Knowlege Parts". The XML would look like: <composition> <part resource="classpath://........" type="DRL"> <part resource="file://........"> <decisiontable-configuration type="XLS" worksheet-name="blah" /> </part> </composition> I have not added a resource type attribute, as we will assume it must start with protocol. classpath will use ClassPathResource, file will use FileSystemResource and anything will be a UrlResource. This would be a special KnowlegeType. I may later make the type optional, once we can infer the type from the .ext. kbuilder.addResource( ResourceFactory.newFileResource( "/data/my-knowledge.xml" ), KnowledgeType.COMPOSITION ); What do people think? Mark _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev MASTEK LTD. Mastek is in NASSCOM's 'India Top 20' Software Service Exporters List. In the US, we're called MAJESCOMASTEK ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ Opinions expressed in this e-mail are those of the individual and not that of Mastek Limited, unless specifically indicated to that effect. Mastek Limited does not accept any responsibility or liability for it. This e-mail and attachments (if any) transmitted with it are confidential and/or privileged and solely for the use of the intended person or entity to which it is addressed. Any review, re-transmission, dissemination or other use of or taking of any action in reliance upon this information by persons or entities other than the intended recipient is prohibited. This e-mail and its attachments have been scanned for the presence of computer viruses. It is the responsibility of the recipient to run the virus check on e-mails and attachments before opening them. If you have received this e-mail in error, kindly delete this e-mail from desktop and server. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ _______________________________________________ rules-dev mailing list rules-dev(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-dev