[rules-users] sliding window problem

[Sandhya Sree]

thanks.. that worked :-)


On Wed, Mar 12, 2014 at 12:20 AM, Davide Sottara <dsotty at gmail.com> wrote:

>  No, the combination of accumulate/count + over should be fine (I didn't
> check though).
> The problem is that you are simply creating the Events, but not inserting
> them in the wm.
> You need to add insert(event) to your rules
>
>
>
> On 03/11/2014 07:39 PM, grules wrote:
>
>  I think you have to follow the structure of accumulate function. Like
>
> *<result pattern>* from accumulate( *<source pattern>*,
>
>                                   init( *<init code>* ),
>
>                                   action( *<action code>* ),
>
>                                   reverse( *<reverse code>* ), (optional)
>
>                                   result( *<result expression>* ) )
>
>
>
> examples are:
>
> when
>
>     $order : Order()
>
>     $total : Number( doubleValue > 100 )
>
>              from accumulate( OrderItem( order == $order, $value : value ),
>
>                               init( double total = 0; ),
>
>                               action( total += $value; ),
>
>                                      result( total ) )
>
> then
>
>     # apply discount to $order
>
> end
>
>
>
> As I understand from your code,
>
> 1.  Make List for Event class, because accumulate will loop through the
> elements of List<Event>
>
> 2.  Init (write action codes, i.e. initialize value so you will find how
> many time it got looped)
>
> 3.  Write code inside the block of action(//code here) and
>
> 4.  Update it in result block i.e. result(//update here);
>
>
>
> Being said, follow the structure 1) init, 2) action, 3) result as above..
>
>
>
>
>
>
>
>
>
> *From:* Sandhya Sree [via Drools] [mailto:ml-node+ <ml-node+>[hidden
> email] <http://user/SendEmail.jtp?type=node&node=4028640&i=0>]
> *Sent:* Tuesday, March 11, 2014 1:51 PM
> *To:* Gopu Shrestha
> *Subject:* [rules-users] sliding window problem
>
>
>
> i have a class called Event which has the following members { name,
> source, timestamp } with getters ,setters and constructor. i have a rule
> file which creates Event objects whenever a file is added / deleted in a
> particular folder. the rule file is as follows
>
>
>
> rule "new file"
>
> when
>
> $p: RuleContext( $old : getOldContext().getContainedFiles(), $new :getNewContext().getContainedFiles())
>
> RuleContext( $old != $new)
>
> accumulate( $s : Object( this not memberOf $old ) from $new, $plus : collectList( $s ) )
>
> events : Object() from $plus;
>
> then
>
> Event event = new Event("new file added",$p.getOldContext().getParent(),new Date());
>
> end
>
>
>
>
>
> rule " file deleted"
>
> when
>
> $p: RuleContext( $old : getOldContext().getContainedFiles(), $new:getNewContext().getContainedFiles())
>
> RuleContext( $old != $new)
>
> accumulate( $t : Object( this not memberOf $new ) from $old, $mins : collectList( $t ) )
>
> events : Object() from $mins;
>
> then
>
> Event event = new Event("file deleted",$p.getOldContext().getParent(),new Date());
>
> end
>
> (do not confuse with RuleContext and other unknown identifiers.. they r
> just related with other classes in the project.. these two rules just works
> fine )..i need to use a sliding time window and create another event if the
> number of file additions are > 5 over the past 1 minute. my rule file is :
>
>
>
> declare Event
>
> @role( event )
>
> end
>
>
>
>
>
> rule "More than 5 additions"
>
> when
>
> Number(intValue > 5)
>
> from    accumulate( $tick : Event ( name == "new file added" ) over window:time( 1m ),        count( $tick ) ) )
>
> then
>
>     System.out.println("too many additions");
>
> end
>
> i have enabled stream mode processing too.. but it doesnt seem to work.
> what could be the problem?
>
>
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