Hello, I'm working on a project which uses Drools as a component. It is connected to a web server. Every time a request arrives to web server, it in turn loads the facts and invokes fireAllRules. Facts do change over time but rules do not ... I'm bit concerned that this may not be correct of using Drools, since we are constantly doing setup /tear down. Keep facts in memory and updating them when necessary - that requires major change in the architecture of the application. I want to know - has anyone done something similar? Does it lead major problems in future? Performance Issues? Regards Ejaz -- View this message in context: http://drools.46999.n3.nabble.com/What-is-the-correct-approach-towards-us... 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

On 14/02/2013, Matteo Cusmai <cusmaimatteo(a)gmail.com&gt; wrote: > The facts should be immutable, so you should remove them and insert again > when they change. > If your facts change often, you have to consider to use fusion where your > facts will be events. This is a very restricted view of what facts and events should be and when to use what. Facts in WM don't have to be immutable - that's why there is update/modify. Frequent changes of facts don't necessitate Fusion. An event fact is almost always immutable, as a real-world event is. -W _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

Actually stateful session is being used. Everytime a request is served, a new stateful session is created and then at the end it is destroyed. Fact (only 1 tree-like object) is loaded into session. The results of executing rules is captured in a list object. So do you guys think it is OK to follow this approach?

Should I also explore Fusion?

Regards Ejaz -- View this message in context: http://drools.46999.n3.nabble.com/What-is-the-correct-approach-towards-us... 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