[rules-users] Collecting items in a List

[Wolfgang Laun]

You are inserting the collected lists and printing them later, with
low salience. The previously shown rule printed the collected facts on
the fly, which will fire the rule repeatedly and visibly. The new
solution still fires the collecting rule repeatedly, but you don't see
that.

-W



On 20/12/2012, devan.vanreenen at gmail.com <devan.vanreenen at gmail.com> wrote:
> I'm not sure what I did earlier, but when executing the below rules, I get
> the desired results. I insert 20 Alert objects and the rule collects alerts
> according to a specific case number, rules and output below
>
> Rules
>
> rule 'Group alerts for a specific case'
> dialect 'java'
> when
> 	Alert( $caseNumber : caseNumber, $alertNo: alertNo )
>     $list : List( ) from collect($alert : Alert( caseNumber == $caseNumber))
>
> then
> 	insertLogical($list);
> end
>
> rule 'Print inserted lists'
> salience -10
> dialect 'java'
> when
> 	$list : List( )
> then
> 	System.out.println("******Printing list******: ");
> 	System.out.println("******List hashCode: " + $list.hashCode());
> 	for(Object o : $list){
> 		System.out.println(o);
> 	}
> end
>
>
>
> Output
>
> ******Printing list******:
> ******List hashCode: -1902211073
> Alert [caseNumber=1021567, alertNo=1]
> Alert [caseNumber=1021567, alertNo=2]
> Alert [caseNumber=1021567, alertNo=8]
> ******Printing list******:
> ******List hashCode: -68071555
> Alert [caseNumber=1012283, alertNo=1]
> Alert [caseNumber=1012283, alertNo=2]
> Alert [caseNumber=1012283, alertNo=6]
> Alert [caseNumber=1012283, alertNo=2]
> Alert [caseNumber=1012283, alertNo=8]
> Alert [caseNumber=1012283, alertNo=2]
> ******Printing list******:
> ******List hashCode: -485211774
> Alert [caseNumber=1022621, alertNo=6]
> Alert [caseNumber=1022621, alertNo=6]
> Alert [caseNumber=1022621, alertNo=6]
> Alert [caseNumber=1022621, alertNo=2]
> Alert [caseNumber=1022621, alertNo=1]
> Alert [caseNumber=1022621, alertNo=2]
> Alert [caseNumber=1022621, alertNo=2]
> Alert [caseNumber=1022621, alertNo=8]
> ******Printing list******:
> ******List hashCode: 1815474720
> Alert [caseNumber=55506677, alertNo=1]
> Alert [caseNumber=55506677, alertNo=2]
> Alert [caseNumber=55506677, alertNo=6]
>
>
>
> --
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