[rules-users] Trying to get Sliding Windows to work

[ober0n]

Still trying to get sliding windows to work (basing my code off of the
Eclipse supplied "Hello World" example). I don't think I fully understand
how it works yet so I'm trying to simplify things even further by writing a
simple rule that is meant to say:

if (current_message = "Hello" AND exists( goodbye_message within
sliding_window(3 seconds) ))
then print("There was a GOODBYE message before the HELLO message." )

In other words: This rule should fire if the current Hello World message was
preceeded within 3 seconds by a goodbye message.

---------------------------------------------------------------------------------------------------
I wrote a new rule for this:

declare Message
    @role( event )
end 

rule "Goodbye before Hello World"
	when
		Message( status == Message.HELLO )
		exists( Message( status == Message.GOODBYE ) over window:time( 3s ) )
	then
		System.out.println( "There was a GOODBYE message before the HELLO
message." );
end

---------------------------------------------------------------------------------------------------

To send the messages: (ksession is a StatefulKnowledgeSession)

			...
			ksession.insert(goodbye_message);
			ksession.fireAllRules();

			Thread.sleep(5000);
			
			ksession.insert(hello_message);
			ksession.fireAllRules();
			...
---------------------------------------------------------------------------------------------------

I expect to get nothing back since I sent the Hello message 5 seconds after
the goodbye message (outside the sliding window of 3 seconds). But, for some
reason the rule fires and I get one:

"There was a GOODBYE message before the HELLO message." 

Any help would be greatly appreciated.

Thanks!
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