Re: [rules-users] Chart notation, update, and infinite loops

There are several ways of doing that, and some where even mentioned by the other users. One easy way is to simply use "accumulate": rule "update amount" no-loop when $f : Fact( name == "amount" ) Number( $total : doubleValue ) from accumulate( Charge( $amt : amount ), sum( $amt ) ) then modify( $f ) { setAmount( $total ) } end []s Edson 2008/11/4 Dan Seaver <dan.seaver(a)ge.com&gt; > > I'm trying to find a good technique for updating specific facts in > working > memory. What I'm currently doing is something like this: > > Rule "Update Amount" > when > amountFact : Fact(name == "Amount") > charge : Charge() > then > Double amount = amountFact.getAmount(); > Double chargeAmount = charge.getAmount(); > amountFact.setAmount(amount + chargeAmount); > update(amountFact); > end > > The update statement causes an infinite loop. > I tried using no-loop, which works if there is 1 charge, but not if there > are more than one. > > Any help with solutions or strategies would be much appreciated. > -- > View this message in context: > http://www.nabble.com/Chart-notation%2C-update%2C-and-infinite-loops-tp20... > Sent from the drools - user mailing list archive at Nabble.com. > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli JBoss Drools Core Development JBoss, a division of Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list rules-users(a)lists.jboss.org https://lists.jboss.org/mailman/listinfo/rules-users