[rules-users] moving average rule

[Chris Richmond]

Well, it never fires even though the last several values are ALL above my
moving averate limit.I never see the output being written out.  I modified
my limit value to something very very low to ensure the average was beyond
that, but still nothing.   

 

I understand what you are saying about Expert+Fusion and that was my
understanding as well and I have been reading through the docs on that
links, however I have not read all of the documentation exhaustively yet.
There doesn't seem to be a lot of samples(syntax wise) for authoring rules
taking advantage of those Fusion features.  There are isolated one or two
line samples, but I guess I am having a difficult time determining how to
author rules based on collections of data.think of sensor data over time..so
I want to author rules that work on the latest readings plus some
configurable amount of readings in the past.  From the Fusion features
description, it seems ideal..but finding out the nuts and bolts of
implementing it is eluding me thus far.  

 

I am continuing the reading as well..perhaps I have not come across it yet..

 

Thanks again for your help.

 

Chris  

 

 

 

  _____  

From: rules-users-bounces at lists.jboss.org
[mailto:rules-users-bounces at lists.jboss.org] On Behalf Of Edson Tirelli
Sent: Tuesday, May 26, 2009 4:24 PM
To: Rules Users List
Subject: Re: [rules-users] moving average rule

 


   Chris,

   Fusion is an extension of Drools Expert. Think about it as all Expert
features + some additional features. That is why Drools Fusion docs is just
a list of features explained.

   I assume you looked here already:

http://www.jboss.org/drools/documentation.html

   For both, expert and fusion docs.

   So, back to your rule, syntax seems correct to me. Why do you say it is
not working? What error or symptoms do you see?

   []s
   Edson

2009/5/26 Chris Richmond <crichmond at referentia.com>

Hello,

 

I am trying to write a rule for a moving average over values over the last
minute using fusion.  In general I can't seem to locate a detailed resource
for authoring syntax for these types of rules or rules in general, but
specifically, I tried to modify something from the fusion documentation for
my purposes using the StockTicker fusion sample.  Here is the rule entry I
aded to the broker.drl:

 

rule "Alert when moving average goes below 50"

when

    Number( doubleValue > 127 ) from accumulate(

        StockTick( symbol == "ORCL", $price: price ) over window:time( 1m ),

        average( $price ) )

then

    System.out.println("moving average has gone beyone moving average");

End

 

I basically want to be alerted any time the moving average for ORCL moves
above 127 (or whatever criteria I set.I picked that based on the sample data
the sample fusion project uses), but it doesn't seem to be working.  

 

I guess if I could locate the definitave samples or guide for authoring
these types of rules I could use that, but it's very difficult to piece
together how to author rules utilizing fusion features based on isolated
snippets from the fusion guide.

 

Can anyone point me to some reasources for learning rule authoring,
especially for taking advantage of the fusion features.

 

Thanks,


Chris


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-- 
 Edson Tirelli
 JBoss Drools Core Development
 JBoss, a division of Red Hat @ www.jboss.com

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