[rules-users] Event Streams

Hi All...again, I am slowly working through my testcase and it seems to be going OK so far. My question is about stored events, @expires set to 1d for instance, and processing rules. declare ParameterUpdateEvent @role(event) @expires(1d1h) End rule "Print Average" no-loop true when ParameterUpdateEvent($paramName : name, $newParamValue : value) from entry-point "ParamUpdateStream" $param : Parameter(name == $paramName) $averageUpdateValue : Number(doubleValue >= 1) from accumulate( ParameterUpdateEvent(name == $paramName, $value : value) over window:time(15m) from entry-point "ParamUpdateStream", average($value)) #Number($averageUpdateValue : doubleValue) then #System.out.println("Here"); System.out.println("Average update value for " + $paramName + " = " + $averageUpdateValue); end Inside my unit test I add a single event to the stream and this rule fires and prints the average value...which is the value of the last update because it is the first event is has seen. I send in another event with a different value and this rule fires twice and prints the correct value both times. From what I can gather this is due to the fact that there are 2 events on the stream at this point even though I have processed one already. What is the best practice to handling only the last event on a stream? Since the documentation states that events should be immutable I can't add a processed flag. Thank you for all your support thus far. Glenn