Re: [rules-users] Guvnor and drools implementation - questions

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:

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.

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-imp... >> 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-imp... > ------------------------------ View this message in context: Re: Guvnor and drools implementation - questions<http://drools-java-rules-engine.46999.n3.nabble.com/Guvnor-a... 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