2011/3/1 ioda100 <[email protected]> > Thanks for your quick answer Esteban. > > 1) Ok i will have a look at DSL. In fact in my map i know all the > properties (about 200). It would be cool to be able to have a drop down list > with all these attributes as when we do it with objects for which we gave > Pojo to Guvnor. > > > 2) Yes i set the global constant i my application and put it in the > session. But when a rule fire, it has to send back a value "OK" for example > to the application. So i use the global consatnt to do that. As you say > guvnor don't create a working memory (needed to change the global constant), > i have to write by hand the lines : WorkingMemory wm = > drools.getWorkingMemory(); > wm.setGlobal("resultValue", "OK"); ? > > I would not change the entire global object; I would just change a field: global Result result; ... then result.setValue( "OK ");
> i use version 5.1 of drools and guvnor. > > 3) ok i will stay with this solution. yes i only need to stop after the end > of the rule that has successfully fired. I have tried other things like > workingMemory.stop() or something like this but it was not working. > > Calling fireUntilHalt() and calling halt() from an ActivationEventListener would be a technique that doesn't require any messing with the rules. (Except, to be on the safe side, the addition of a very low-salience rule acting as a sentinel if nothing else fires.) -W > Thank you again > > > > On Tue, Mar 1, 2011 at 1:55 PM, Esteban [via Drools - Java Rules Engine] > <[hidden > email] <http://user/SendEmail.jtp?type=node&node=2603551&i=0>> wrote: > >> Hi, >> >> 1) my facts are in fact java Maps, is there an easy way to deal with them >> in >> guvnor? it's not like in the example where facts are objects and we give >> guvnor the Pojo model to know what we can do with it >> >> for example i have : >> $m : Map((this["attribute1_of_the_map"] == "test1")) >> >> How to deal with the map and have a prepopulated list of properties of the >> map? And to store it in the variable $m. Without using the "free from drl" >> where we have to write it by hand. >> >> I think you could use DSL for achieve this. You could define your own DSL >> saying for example *There is a Test=Map((this["attribute1_of_the_map"] == >> "test1" *I would leave the variable binding to the editor. So when you >> add this particular pattern to a rule, you can bind it it you want to. >> >> 2) how to deal with global constant with guvnor? >> >> i have something like : >> WorkingMemory wm = drools.getWorkingMemory(); >> wm.setGlobal("resultValue", "OK"); >> >> Is it a direct way to play with global constant in Guvnor? Without using >> the >> "free from drl" where we have to write it by hand. >> >> The values of the globals are set in runtime. Guvnor doesn't create any >> ksession (or working memory) for rules authoring. There is no need to do >> that. So, you can declare your globals in Guvnor's package area and then >> use them in your rules. When an application uses these rules, and creates a >> ksession from them, it must provide the value for these globals. >> By the way, which version of Drools are you using? >> >> 3) for stopping firing rules after one rule fire successfully, do you know >> if there is an option to do that? >> For now i insert a boolean in the session and the first condition in all >> my >> rules is that this boolean is there. When a rule fires successfully, i >> retract it. I suppose there is a bettre way to do it? >> >> I think the approach you have chosen is elegant enough. Of course that it >> will only prevents new activations to happen but it will not prevent current >> activations to be executed. For a cleaner implementation, you can make a >> super-rule with that condition and then make all your rules to inherit from >> it. >> There is actually a way to force the engine to stop (I don't remember it, >> but I'm pretty sure it is documented), but I don't know if that would be the >> best solution since I don't know if it has any collateral effect. >> >> Best Regards, >> >> >> XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX >> >> Esteban Aliverti >> - Developer @ http://www.plugtree.com >> - Blog @ http://ilesteban.wordpress.com >> >> >> On Tue, Mar 1, 2011 at 9:27 AM, ioda100 <[hidden >> email]<http://user/SendEmail.jtp?type=node&node=2602877&i=0> >> > wrote: >> >>> Hi, >>> >>> i have a few questions : >>> >>> 1) my facts are in fact java Maps, is there an easy way to deal with them >>> in >>> guvnor? it's not like in the example where facts are objects and we give >>> guvnor the Pojo model to know what we can do with it >>> >>> for example i have : >>> $m : Map((this["attribute1_of_the_map"] == "test1")) >>> >>> How to deal with the map and have a prepopulated list of properties of >>> the >>> map? And to store it in the variable $m. Without using the "free from >>> drl" >>> where we have to write it by hand. >>> >>> 2) how to deal with global constant with guvnor? >>> >>> i have something like : >>> WorkingMemory wm = drools.getWorkingMemory(); >>> wm.setGlobal("resultValue", "OK"); >>> >>> Is it a direct way to play with global constant in Guvnor? Without using >>> the >>> "free from drl" where we have to write it by hand. >>> >>> 3) for stopping firing rules after one rule fire successfully, do you >>> know >>> if there is an option to do that? >>> For now i insert a boolean in the session and the first condition in all >>> my >>> rules is that this boolean is there. When a rule fires successfully, i >>> retract it. I suppose there is a bettre way to do it? >>> >>> Thanks in advance for your help >>> >>> -- >>> View this message in context: >>> http://drools-java-rules-engine.46999.n3.nabble.com/Guvnor-and-drools-implementation-questions-tp2602641p2602641.html<http://drools-java-rules-engine.46999.n3.nabble.com/Guvnor-and-drools-implementation-questions-tp2602641p2602641.html?by-user=t&by-user=t> >>> Sent from the Drools - User mailing list archive at Nabble.com. >>> _______________________________________________ >>> rules-users mailing list >>> [hidden email] <http://user/SendEmail.jtp?type=node&node=2602877&i=1> >>> >>> https://lists.jboss.org/mailman/listinfo/rules-users >>> >> >> >> _______________________________________________ >> rules-users mailing list >> [hidden email] <http://user/SendEmail.jtp?type=node&node=2602877&i=2> >> https://lists.jboss.org/mailman/listinfo/rules-users >> >> >> ------------------------------ >> If you reply to this email, your message will be added to the discussion >> below: >> >> http://drools-java-rules-engine.46999.n3.nabble.com/Guvnor-and-drools-implementation-questions-tp2602641p2602877.html<http://drools-java-rules-engine.46999.n3.nabble.com/Guvnor-and-drools-implementation-questions-tp2602641p2602877.html?by-user=t> >> > > > ------------------------------ > View this message in context: Re: Guvnor and drools implementation - > questions<http://drools-java-rules-engine.46999.n3.nabble.com/Guvnor-and-drools-implementation-questions-tp2602641p2603551.html> > Sent from the Drools - User mailing list > archive<http://drools-java-rules-engine.46999.n3.nabble.com/Drools-User-f47000.html>at > Nabble.com. > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users > >
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