[rules-users] Drools with data base

Hi to all, We are using drools with spring integration and with semantic module as java in our project Leave application. Actually we want to know, when we are Entering data at the user side then it has to seach the data base and it has to give the validation. We are using Spring integration for data access. And we know that, if we want data to be retrived through drl file requires DAO object. But we couldn't get any example to go through. So please can we have any real time example. Regards: Kranthi dalai