[rules-users] Problem with FROM and temporal operators
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
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