For issue 2, combination of DSL and wrapper layer around ur engg objects might help ----- Original Message ----- From: kapokfly [ivan.jiang.ww(a)foxmail.com] Sent: 11/11/2011 02:53 AM PST To: rules-users(a)lists.jboss.org Subject: [rules-users] Showstopper issues for Drools Adoption in our organization Not sure if these are also your questions you might have with the rule engine adoption, but we have seen 2 showstopper issues for drools adoption in our organization, or it is just because we are lack of some necessary knowledge. Issue 1) : pattern match for large data There are cases in a rule we need find matched records against a large population of data and perform some actions. Example: From 2 millions employee directory, find those belongs to Depart1 and with salary increased by 10% last year. Inserting all these employee's data into WorkingMemory is HUGE and mission impossible, we can't simply load the entire db into the working memory, do we have any other approach to accomplish or this is just not a use case can be resolved by a rule engine? Issue 2): Map business object to real engineering implementation What we are trying to do is to build a rule UI which a business user without engineering background of our codebase can work with; the business object we show on the UI might be different with the real engineering objects already in system, for example, on the UI a user might be able to able to see something like person.address.addressLine1 but the actually implementation might not be an object traverse implementation. Example, the model could be Long Person.addressId ; then referring to his address we need another lookup and we want to hide such complexity to the end user. The approach we took is to design a translation layer to translate the user input to drools rule string, is this the right approach? If not, any suggestions? I know Drools is mainly designed for developers but just trying to see if there is any way we can work it around. Thanks and looking forward to your recommendations. Ivan ----- Ivan, your Panda, forever -- View this message in context: http://drools.46999.n3.nabble.com/Showstopper-issues-for-Drools-Adoption-... 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 ----------------------------------------- The information contained in this communication (including any attachments hereto) is confidential and is intended solely for the personal and confidential use of the individual or entity to whom it is addressed. If the reader of this message is not the intended recipient or an agent responsible for delivering it to the intended recipient, you are hereby notified that you have received this communication in error and that any review, dissemination, copying, or unauthorized use of this information, or the taking of any action in reliance on the contents of this information is strictly prohibited. If you have received this communication in error, please notify us immediately by e-mail, and delete the original message. Thank you