[rules-users] How to write a rule that fires when it matches against specific facts in working memory.

Hello, I have a fact called 'Option' : public class Option { private String code; private Item item; public String getCode() { return code; } public void setCode(String optionCode) { this.code = optionCode; } At any point in time, the working memory can have several Option instances with different code values. My rules need to fire specifically when the working memory contains a specific set of options. e.g. Rule 1 should fire if and only if the working memory contains 2 option instances one with code "P1" and the other with "P2" (order should not matter). I tried to use 'forall' as follows : rule "Matched Options" when forall ( Option ( code == "P1" || code == "P2" ) ) then //insert( new IsPriced( i ) ); System.out.println ( "Priced using G/S "); end However, the rule above never fires. Maybe I should be taking a different approach. I'm still learning through how to create rules. So any help/suggestions on how to tackle the above will be appreciated. Thanks Gurvinder -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/How-to-write-a-rule-t... Sent from the Drools - User mailing list archive at Nabble.com.