OK. It took me a few laps with the debugger to understand what is happening
with the following:
rule
when
$assignment: Assignment($resource: resource)
not Booking(resource == $resource)
then
insertLogical(new Booking($resource));
end
Basically, in the rhs the insertion of the new Booking causes the lhs to be
reevaluated, and since in the reevaluation, there IS a Booking, it is
retracted. Then the lhs is reevaluated to see that there is NOT a Booking,
and so the rhs is run again, and loop and loop and loop.
But what I don't understand, is if I add an update in the rhs like this:
rule
when
$assignment: Assignment($resource: resource)
not Booking(resource == $resource)
then
update($assignment);
insertLogical(new Booking($resource));
end
there isn't a loop. I didn't take the journey with the debugger to answer
this question, but am still wondering: why does the update break the
infinite loop?
Thanks,
John
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