[rules-users] Fwd: sliding window question

[Lin Lin]

> From: "lin.lin [via Drools]" <ml-node+s46999n4028540h77 at n3.nabble.com>
> Date: March 5, 2014 at 10:47:14 AM CST
> To: "lin.lin" <lin.lin at comcast.net>
> Subject: Re: [rules-users] sliding window question
> 
> Hi Walfgang, 
> 
>   Thanks a lot for the pointers. My goal is to try detect a situation when readings about a user is consistent high for the last 30 seconds. The reading comes every 10 seconds. I have tried many different ways and still can not get it working.  Here are a list of things that I found not working, I am wondering whether anyone has encountered some of this before or whether there is a known issue related to some of this or whether there is some configuration that I am missing in my environment.  Also, what is a good way to find out whether a event has expired or still in working memory?  I am stuck, please help. 
> 
> 1) the following rule does not work, according to drools book, this should work. 
> 
> rule "rule1" 
>        dialect "mvel" 
>        when 
>          $user: mUser(status==true) 
>          not (Reading ($user.userid== userid, reading<=90) over window :time (30s) from entry-point ReadingStream 
>        then 
> 
> 2) the following rules work on its own, (that is if I only include one rule in the .drl file), but when I put both rules in the .drl file,  only the acumtest rule works but nothing comes out from  "rule1"   
> 
> rule "acumtest" 
> dialect "mvel" 
>   when 
>    accumulate( Reading( $r:reading) over windiw:time(30s) from entry-point ReadingStream, $sum : sum($r)) 
>   then 
>     System.out.print ("sum=" +$sum+"\n"); 
> end 
> 
> rule "rule1" 
> dialect "mvel" 
>     when 
>       $user: mUser(status==true) 
>       $hr1 : Reading ($user.userid==$hr1.userid, reading>90) from entry-point ReadingStream 
>       $hr2 : Reading ($user.userid==$hr2.userid, reading>90, this after [30s,30s] $hr1) from entry-point ReadingStream 
>       not Reading ($user.userid == userid, reading<=90, this after $hr1, this before $hr2) from entry-point ReadingStream 
>     then 
> 
> 3) The following rule does not work, but if I comment out the accumulate line in the condition, it works.  Somehow, the accumulate function does not work with other rules or making event expired ?? 
> 
> rule "rule1" 
> dialect "mvel" 
>     when 
>       $user: mUser(status==true) 
>       $hr1 : Reading ($user.userid==$hr1.userid, reading>90) from entry-point ReadingStream 
>       $hr2 : Reading ($user.userid==$hr2.userid, reading>90, this after [30s,30s] $hr1) from entry-point ReadingStream 
>       not Reading ($user.userid == userid, reading<=90, this after $hr1, this before $hr2) from entry-point ReadingStream 
>       $test: Number( doubleValue>0 ) from accumulate ( Reading( userid==$user.userid, $r:reading) over window:time(30s) from entry-point ReadingStream, sum($r)) 
>     then 
> 
> 4) This does work, but if I uncomment out the $hr4 line, then it does not work anymore 
> rule "rule1" 
> dialect "mvel" 
>     when 
>       $user: mUser(status==true) 
>       $hr1 : Reading ($user.userid==$hr1.userid, reading>90) from entry-point ReadingStream 
>       $hr2 : Reading ($user.userid==$hr2.userid, reading>90, this after [10s,10s] $hr1) from entry-point ReadingStream 
>       $hr3 : Reading ($user.userid==$hr3.userid, reading>90, this after [10s,10s] $hr2) from entry-point ReadingStream 
>       // $hr4 : Reading ($user.userid==$hr4.userid, reading>90, this after [10s,10s] $hr3) from entry-point ReadingStream 
>       $test: Number( doubleValue>0 ) from accumulate ( Reading( userid==$user.userid, $r:reading) over window:time(30s) from entry-point ReadingStream, sum($r)) 
>     then 
> 
> 
> Thanks  a lot! 
> 
> Lin 
> 
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