Hi all,
I am working on a small prototype of event processing with Esper. To model
events I am using the Event class from the EventAdmin bundle.
My problem is that I don't know how to retrieve the attributes of an event in a
statement. For example I have an event with the topic MarketData with the
properties (product, price, volume)
and I would like to retrieve only the events with the attribute product="p1".
Something like the following:
select * from MarketData.win:time(10 sec) where topic="MarketData" and
product="p1"
But this statement troughs an error "Error validating expression: Property
named 'price' is not valid in any stream", so I guess this is not the right
way...
Did any of you had experience with Esper on OSGI?
I would appreciate your help,
Laura
