[rules-users] Temporal operators for point-in-time events

[Edson Tirelli]

    Good catch. The diagram is wrong. It should be as it is stated in the
documentation.

    Edson

On Tue, Dec 13, 2011 at 2:47 PM, Mike Melton <mike.melton at gmail.com> wrote:

> Thank you, Edson.
>
> I saw the written documentation but since the default after interval
> is [1ms, infinity], I wanted to check for the specific [0, infinity]
> case that there wasn't a better suited operator.
>
> I do have a (somewhat related) question about the documentation when
> compared to the diagram(s). Take, for example, the finishedby
> operator. The documentation says "A finishedby B" means A starts
> before B and A and B finish at the same time. However, the diagram
> shows A starting *after* B and A and B finishing at the same time. The
> other related operators (finishes, starts, startedby) all have the
> same discrepancy. (Additionally, the second diagram in the
> presentation includes a different definition for the finishes operator
> than the first diagram. Maybe it should be startedby?)
>
> My tests show me that the written documentation is correct and the
> diagram is not. Unless I am reading the diagram incorrectly; if that
> is the case, can someone explain it?
>
> Thanks.
>
>
> 2011/12/13 Edson Tirelli <ed.tirelli at gmail.com>:
> >
> >    Your use of the after operator is correct. The documentation tells you
> > about that, although in textual form:
> >
> >
> http://docs.jboss.org/drools/release/5.3.0.Final/drools-fusion-docs/html_single/index.html#d0e611
> >
> >    This presentation has the 2 tables of operators:
> >
> >
> http://www.slideshare.net/ge0ffrey/applying-cep-drools-fusion-drools-jbpm-bootcamps-2011
> >
> >     Edson
> >
> > On Tue, Dec 13, 2011 at 12:11 PM, Mike Melton <mike.melton at gmail.com>
> wrote:
> >>
> >> Apologies for the stupid question, but I haven't seen anything in the
> >> documentation regarding this and I want to verify my solution. Say I
> >> have a point-in-time event (i.e., duration of 0) that I want to
> >> correlate to another point-in-time event. I want a rule that will
> >> activate if the timestamp of one is greater than or equal to the
> >> other, basically "after or coincides". I wrote a test using the
> >> following rule and it seemed to work:
> >>
> >> rule "Greater Than or Equal"
> >>  when
> >>    $e1 : TestEvent( $id : id )
> >>    $e2 : TestEvent( id != id, this after[0ms] $e1 )
> >>  then
> >>    System.out.println($e2 + " is greater than or equal to " + $e1);
> >> end
> >>
> >> I realize this rule will fire twice if the event timestamps are equal,
> >> but it's just for demonstration purposes; my question is specifically
> >> about the "after[0ms]" part. Is this the way to go to accomplish what
> >> I need? It seems so simple but I have this annoying feeling that I'm
> >> missing something.
> >>
> >> On a slightly related topic, is there an updated version of the
> >> temporal operators image from the Drools Fusion homepage? It is a
> >> great visual description of the operators and I want to print it out
> >> and post it at my desk, but it doesn't include all of the operators.
> >>
> >> Image:
> >>
> http://www.jboss.org/drools/drools-fusion/mainColumnParagraphs/02/imageBinary/temporal-operators.png
> >> >From page: http://www.jboss.org/drools/drools-fusion.html
> >>
> >> Thanks
> >> Mike
> >> _______________________________________________
> >> rules-users mailing list
> >> rules-users at lists.jboss.org
> >> https://lists.jboss.org/mailman/listinfo/rules-users
> >
> >
> >
> >
> > --
> >   Edson Tirelli
> >   JBoss Drools Core Development
> >   JBoss by Red Hat @ www.jboss.com
> >
> > _______________________________________________
> > rules-users mailing list
> > rules-users at lists.jboss.org
> > https://lists.jboss.org/mailman/listinfo/rules-users
> >
>
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-- 
  Edson Tirelli
  JBoss Drools Core Development
  JBoss by Red Hat @ www.jboss.com
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