[rules-users] Unexpected Accumulate Collect behavior

[rymy8564]

I'm using Spring AMQP to read messages from RabbitMQ.  After a message is
read it's deserialized into one header (parent) object and multiple detail
(child) objects.  Those facts are then inserted into a stateless rule
session.  Finally, the updated facts are inserted into a database.

I have several rules that will aggregate the detail facts using either the
collect or accumulate functions.  Here's an example.

rule "Header.TotalDuration"
when
	h : BresHeader()
	n : Number()
		from accumulate( d : BresDetail(willSendToInvoice==true, uniqueConfID ==
h.uniqueConfID), sum(d.Duration) )
then
	h.TotalDuration = new Integer(n.longValue());
	System.out.println("[TotalDuration] rule ran");
end

If I run this once (reading in one message) in jUnit, the TotalDuration is
calculated correctly.  If I run it in tomcat (continuously reading messages)
the values for TotalDuration are not correct and increase after each each
pass (message is grabbed, rules ran, facts persisted, repeat) and I can't
figure out why.

Can anyone shed light on this behavior?



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