[rules-users] Multiple threading

Hey, I am trying to get multiple threads to insert events and run rules against the union of events inserted ( an as soon as they are inserted, a timer drools thread kicking of fireallrules() is not an option because that would introduce a delay ) and wanted some opinion on the following: 1. Stateless session is basically a wrapper around statefulsession and since per doc statefulsession is not threadsafe is it safe to assume 2 threads cannot insert and run fireallrules to compare against a union of objects inserted by multiple threads without some synchronication on event insertion and ESP fireallrulesrules ? ( would the answer still hold despite a drools-camel endpoint reading and storing exchanges from multiple threads ? ) 2. If in the above point we simplify the case where the rule uses the "from" keyword and reads from a cache or a Db ( is reading from A cache supported out of the box ? ) then will drools bhaviour will be bound by the thread which invokes fireallrules() ?