Ciao, not really sure where is your problem exactly, but as I use often similar use-case of yours, thought worthy to share what I usually find useful:

1. check STREAM mode is activated

2. check in the .drl is clearly defined what is a Fact, and what is an Event. In your case I would check TemperatureRead is declared as Event?

3. activate Audit log / runtime logger. 

I find especially useful point #3 because you will see, as the session clock advances, what is still in working memory and when rule is activated you will see against which Event/Facts.

Hope this is helpful

Ciao

MM

On Fri, Dec 6, 2013 at 11:54 PM, martinzp <martinzp@gmail.com> wrote:

Hi, i am new in the forum, and a beginner user of Drools so forgive me if my
question isn't quite good.

I want to test the "over window:time" operand.

In order to do that i use the pseudo clock, but i have noticed that it
doesn't behave as i would expect.

The behaviour i think i observed, is that the rule is using the real clock
instead of the pseudo clock.

*Here is my drl file:*

rule "Fire Detected"
when
    c : Number(intValue >= 3) from accumulate (
        $tr : TemperatureRead(read > 40)
            over window:time ( 1s )
            from entry-point entryone ,
            count ($tr)
             )
then
    System.out.println("Fire Detected!");
end



*and here is the portion of my main file that inserts the events:*

TemperatureRead temp1 = new TemperatureRead(33.2);
TemperatureRead temp2 = new TemperatureRead(38.7);
TemperatureRead temp3 = new TemperatureRead(39.5);
TemperatureRead temp4 = new TemperatureRead(42.5);
TemperatureRead temp5 = new TemperatureRead(43.1);
TemperatureRead temp6 = new TemperatureRead(47.8);

SessionPseudoClock clock = ksession.getSessionClock();

        entryPoint1.insert(temp1);

        clock.advanceTime((new Date()).getTime(), TimeUnit.MILLISECONDS);

        fireRules();

        entryPoint1.insert(temp2);

        clock.advanceTime(1, TimeUnit.SECONDS);

        fireRules();

        entryPoint1.insert(temp3);

        clock.advanceTime(1, TimeUnit.SECONDS);

        fireRules();

        entryPoint1.insert(temp4);

        clock.advanceTime(1, TimeUnit.SECONDS);

        fireRules();

        entryPoint1.insert(temp5);

        clock.advanceTime(1, TimeUnit.SECONDS);

        fireRules();

        entryPoint1.insert(temp6);

        fireRules();





In my opinion, the rule shouldn't be fired, because as i am (supposedly)
using the pseudo clock, the events shouldn't fall into the same sliding
window (1 second.)

In general, the rule should fire when it detects 3 or more temperature reads
with a temperature over 40.

Any idea about what i might be doing wrong?

Thanks in advance!







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