[rules-users] Temporal operators for point-in-time events
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@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Temporal operators for point-in-time events
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.mel...@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@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@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
Re: [rules-users] Temporal operators for point-in-time events
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.tire...@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.mel...@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@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@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users ___ rules-users mailing list rules-users@lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users
