Hi Davide, Thanks for the prompt reply, Now i have changed my requirement a bit, to make it much simpler function boolean foo(List list){ //do some action on the list & set true false accordingly. system.out.println("foo "); return true/false; } rule "one" no-loop salience -1 when //condition 1 then system.out.println("one in"); //populate a list system.out.println("one out"); end rule "two" salience -2 when eval(foo(pass the list that we populated in the above rule)) then system.out.println("two in"); //do some action system.out.println("two out"); end O/P we are getting: - foo one in foo foo one out two in two out Expected O/P one in one out foo two in two out Please suggest a way to do the same. Regards, Sam -- View this message in context: http://drools.46999.n3.nabble.com/Calling-a-function-from-When-part-tp401... 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

Hi laune, Ok let me state you my req, In my pojo I populate a list of employeesNo that have age > 30, by firing a query on my Employee *metadata* tables of company say ABC. Then I come to the rules & try to see if the company name is ABC? If yes, i need to fetch all the employeeNo having age>30 from the Employee *Runtime* table( This table stores records for all employees working today ), in this way i will come to know if all employees above age 30 are present or not. Regards, Sam -- View this message in context: http://drools.46999.n3.nabble.com/Calling-a-function-from-When-part-tp401... 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 for the idea, Sorry to say, but can you please explain me the flow, as in how we are going to access the data of employees from the runtime table? More over can you put some focus on the "global EmployeeTable empTable; " Regards, Sam -- View this message in context: http://drools.46999.n3.nabble.com/Calling-a-function-from-When-part-tp401... 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

Hey laune, I think we are mixing up the things. My requirement is to call a method in an helper class, that in turn accesses the db. Currently i have done with */evel(functionCall() )/* //The return type of the method is boolean *But the problem is, once the control enters WHEN part of the rule it making multiple calls to this method ( checked by putting in SYSO statements). But i want this call to take place once.* So it will be very helpful, if any once can suggest me any other way to make function call from when part. Also tried with /*$A : Boolean() from functionCall( ) eval( $A )*/ But the result is same. Also please provide your inputs if it is not possible to handle the problem, where in it make multiple function call. Regards, Sam -- View this message in context: http://drools.46999.n3.nabble.com/Calling-a-function-from-When-part-tp401... 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