Re: [rules-users] Rule using accumulate

From: Andres Corvetto <acorvetto(a)gmail.com&gt; Subject: Re: [rules-users] Rule using accumulate To: rules-users(a)lists.jboss.org Date: Tuesday, April 27, 2010, 8:56 AM Offers already have a creationTimestamp, that could be used for this. However, it's not clear to me how to write a rule that matches only the Offer with the minimum creationTimestamp. Something like: rule "Match Offer"     when         $b : PartiallyCoveredBid(uncoveredSize>0, $p:price)         $o : Offer(price<$p, alreadyUsed==false, creationTimestamp<[all other matching Offer creationTimestamps ])     then         [ add Offer $o to Bid $b] end is that possible? - Andres Wolfgang Laun-2 wrote: > > If the age of Offers is so important it ought to be represented as > fact data. If it cannot be added to the Offer itself, a proxy fact > could be created, combining a counter with an Offer reference. A high > salience rule for an Offer without OfferProxy would create this. > > -W > > On Mon, Apr 26, 2010 at 9:43 PM, Andres Corvetto <acorvetto(a)gmail.com&gt; > wrote: >> >> Thank you for your reply! >> I understand your approach, and I think it could work if Offers were >> inserted into the working memory after the Bid. >> However, to implement your approach for already inserted Offers I think I >> would need some way of forcing the matching Offer to be the oldest in >> memory, is that possible? >> The rule would be something like: >> >> rule "Match Offer" >>        when >>                $b : PartiallyCoveredBid(uncoveredSize>0, $p:price) >>                $o : Offer(price<$p. alreadyUsed==false, [this is the >> oldest Offer in >> memory with these conditions]) >>        then >>            [ add Offer $o to Bid $b] >> end >> >> Thanks again >>       Andrés >> -- >> View this message in context: >> http://drools-java-rules-engine.46999.n3.nabble.com/Rule-using-accumulate... >> 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 >> > > _______________________________________________ > rules-users mailing list > rules-users(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/rules-users > > -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Rule-using-accumulate... 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