The activation contains fact handles, and one must use workingMemory.getObjct( handle ) to obtain the object - at least a consequence exception handler would do this.
It is debatable whether long delays are in order when an application is using real-time event processing. Time-stamped inserts should not be done before the backlog of restoring everything has been completed. -W On 3 November 2011 14:34, Robert Crawford <crawf...@kloognome.com> wrote: > I have this rule: > > rule "Defrost: Turned On" > when > $reading : SwitchReading( switchOn == true ) from entry-point > "ReadingsStream" > not SwitchReading (this.circuit == $reading.circuit, this after $reading > ) from entry-point "ReadingsStream" > not DefrostSwitchOn(this.circuit == $reading.circuit) > then > LOG.info("Defrost switch turned on by reading '" + $reading + "'."); > insert(new DefrostSwitchOn($reading)); > end > > SwitchReading is an event; DefrostSwitchOn is a POJO fact. > > Multiple times I've gotten exceptions where this rule's RHS is called with > a > null. The ConsequenceExceptionHandler is supposed to list the facts the RHS > was called with, but it's getting an empty list. > > Now, I know my system as it currently stands can take a LONG time between > receiving an event and executing the consequence, primarily when it first > starts and is loading its previous known state. It's entirely believable to > me that the event will have expired before the rule's RHS is called. But > shouldn't the event still be referenced by the Activation? > > > > -- > View this message in context: > http://drools.46999.n3.nabble.com/Rules-called-with-null-references-tp3477164p3477164.html > Sent from the Drools: User forum mailing list archive at Nabble.com. > _______________________________________________ > rules-users mailing list > rules-users@lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users >
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