Hi, I'm trying to get the following rule running: import foo.bar.Device; import foo.bar.Signal; declare Signal @role( event ) @timestamp( time ) end rule "No red signal within the last 3 days before job start for type=4 devices .." salience 1000 when $p : Device( type == "4" ) $e : Signal( status == "red", this before[24h,0s] $p.jobTime) from $p.getSignalBuffer() then // do something ... end For a special kind of device it should be checked whether there have been alarms raised within a certain time interval. A couple of "devices" are inserted as facts. Each device has a buffer with its n past "signals". public class Device { String type; List<Signal> signalBuffer = new ArrayList<Signal>(); Date jobTime = new Date(); // Getters and Setters } public class Signal { Date time; String status; // Getters and Setters } These classes are generate by JAXB/xjc according to a given XML Schema. Although the rule looks OK to me, I'm getting the exception: java.lang.ClassCastException: org.drools.common.DefaultFactHandle cannot be cast to org.drools.common.EventFactHandle I assume that "From" doesn't really work with the temporal operator and events. Is there a way to get this working? Kind regards Harris -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Problem-with-FROM-and... Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users

I checked it out and it works :-)

I've inserted only the devices directly as facts, because I wanted to maintain the structure of the data, which I receive as XML. Maybe it's a good idea to insert the signals of each device as facts in the beginning as well. But then I'll have to create specialized classes for signals, which in addition hold the information about the "parent device".

Thanks for your help, Harris -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Problem-with-FROM-and... Sent from the Drools - User mailing list archive at Nabble.com. _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users