Hi all, Since yesterday, I am having a problem with reading inserted objects from memory. I don't know why it does not go as planned, because it should be quite straightforward. It is getting boring to stare at the code, so maybe one of you can detect an error. There are 2 kinds of rules. One kind inserts price objects into working memory (as in example 1). THe other kind detects whether the price exists and adapts it to a product (as in example 2). Example 1 seems to work, but the engine does not seem to recognize them as a Price object. All original price attributes of the products remain unchanged unless: - I manually insert a Prce object before calling fireAllRules() or - Checking for an existing price is commented out in the LHS Removing constraints from $price (just checking for existance of a price) does not help. Any idea what has been going wrong? Thanks in advance. ==============Example 1================= rule "Prices_17" lock-on-active true when then Price $price = new Price(); $price.setName("Blue autumn"); $price.setPrice(6); insert($price); System.out.println("Price " + $price.getName() + " inserted"); end =============Example of usage========================= rule "Products_36" lock-on-active true when $product: Product(colour == "Blue") Season(season == Season.AUTUMN) $price: Price(name == "Blue autumn") then $product.setPrice($price.getPrice()); update($product); System.out.println("Rule executed"); end =================================================== -- View this message in context: http://drools-java-rules-engine.46999.n3.nabble.com/Object-insertion-on-r... 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

I know etiquette stipulates to avoid small talk, but since there is no "resolved" button, I think this can be useful. You suspected rightly, manstis, removing lock-on-active and replacing it with extra constraints in the LHS indeed solved the problem. Thanks for the quick (and correct) response :-). manstis wrote: > > I suspect your use of lock-on-active. > > Expert's documentation states: "Whenever ... an agenda-group receives the > focus, any rule within that group that has lock-on-active set to true will > not be activated any more; irrespective of the origin of the update, the > activation of a matching rule is discarded". Both rules are in the default > MAIN agenda group so when the first inserts a new Price the update to WM > (insert in your case) is not visible to the other rule. Inserting a new > Price before calling fireAllRules or commenting out the price constraint > in > the LHS alters the Facts\Patterns needing to be matched for activation to > occur. > > So, try removing lock-on-active (or making the two rules in different > agenda > groups). > > With kind regards, > > Mike > > On 8 March 2011 09:53, FrankVhh wrote: > >> Hi all, >> >> Since yesterday, I am having a problem with reading inserted objects from >> memory. I don't know why it does not go as planned, because it should be >> quite straightforward. It is getting boring to stare at the code, so >> maybe >> one of you can detect an error. >> >> There are 2 kinds of rules. One kind inserts price objects into working >> memory (as in example 1). THe other kind detects whether the price exists >> and adapts it to a product (as in example 2). >> >> Example 1 seems to work, but the engine does not seem to recognize them >> as >> a >> Price object. All original price attributes of the products remain >> unchanged >> unless: >> - I manually insert a Prce object before calling fireAllRules() >> or >> - Checking for an existing price is commented out in the LHS >> >> Removing constraints from $price (just checking for existance of a price) >> does not help. >> >> Any idea what has been going wrong? >> >> Thanks in advance. >> >> ==============Example 1================= >> rule "Prices_17" >> >> lock-on-active true >> when >> then >> Price $price = new Price(); >> $price.setName("Blue autumn"); >> $price.setPrice(6); >> insert($price); >> System.out.println("Price " + $price.getName() + " >> inserted"); >> end >> =============Example of usage========================= >> >> rule "Products_36" >> >> lock-on-active true >> when >> $product: Product(colour == "Blue") >> Season(season == Season.AUTUMN) >> $price: Price(name == "Blue autumn") >> then >> $product.setPrice($price.getPrice()); >> update($product); >> System.out.println("Rule executed"); >> end >> =================================================== >> >> -- >> View this message in context: >> http://drools-java-rules-engine.46999.n3.nabble.com/Object-insertion-on-r... >> 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/Object-insertion-on-r... 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