[rules-users] Controlling Rule Execution

[jking527467]

All, 

I'm new to Drools and I'm faced with what seems to be a pretty trivial task
that's taken a lot longer than expected. 

I'm working mainly with distances and am looking for an plain English
response to this trivial problem. 

Here's the problem: 

- Activate all things within x miles. 
  - If nothing is within x miles, activate all things within y miles. 

It seems pretty straight forward but here's my dilemma.  If I execute on y
miles first, everything within x miles will also be activated.  I need to
ensure the things between x and y miles aren't activated if anything is
within x miles of a certain fact. 

Does this make any sense to anyone?  I'm have a hard time grasping the
proper approach and have looked into activation groups, etc. but haven't had
any luck. 

Any help is GREATLY appreciated!!! 

Thanks in advance! 
Jason



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