can I cache a kiesession in drools expert?

Question

I have a large set of rules and when I execute

KieSession ksession = kc.newKieSession(sessionName);

It takes a long time. I would like to reuse the kiesession. How is it possible to do that? My input records come one at a time and not in a batch.

There is very little documentation available. .

Answer 1

Here is the sample code.
I think this might be useful for some one else. I found that when I have to process a large batch then the best way is to process a bunch of records at a time if possible. and then cache the kiesession.(Do not call dispose.!!) Just remove the fact handles after the set is done.

List<FactHandle> fhs = new ArrayList<FactHandle>();//store the fact handles
//for removing later
.....in a loop add one or multiple records
....
fhs.add(ksession.insert(prcRec));
..............................

for (FactHandle factHandle : fhs) {
            ksession.delete(factHandle);
        }//Delete the fact handles so that next batch can be handled