[rules-users] Guvnor and drools implementation - questions

[Vincent Legendre]

> I will rethink of POJO but i think, it will be more ennoying to update 
> any change. I will need a reference to these maps in almost every case 
> in the THEN clause so not a big problem finally.
It's up to you. With a POJO you can implement Comparable using your time 
slots, and all other common behaviour that you will need later ... and 
don't be forced to set a tricky DSL ... and have validation/compilation 
telling you that you are using a non-existent field instead of getting 
NPE at runtime ... but it's up to you :)

>
> For the second question :
>
> In fact i have to make rules using these Enum and DSL and put rules in 
> their specific files.
> For example now i am working with 4 different drl files :
Files ?
According to your DSL questions, I guess that you are working with 
Guvnor, so you are getting your file via the package URL for the 
generated DRL file ?
You should create compiled package, because :
    - rules are compiled so the KB loading is faster
    - Guvnor (since 5.1) ca generate compiled package with only a subset 
of the rules, filtering them by category and/or status (or by a custom 
selection using rules :) ).

But if you can't,or don't want to create binaries, and still want to 
store all rules inthe same package (to avoid duplicating DSL and enums), 
may be you can
    - assign your rules a 'ruleflow-group' and create a ruleflow that 
branch on the suitable group.
    - use 'agenda-group'.
    - With no rule flow, you can add to all your rules a condition that 
match a fact telling which group is executing
         rule r1
         when
           Exec(task == "task1")
           $m1 : ...
         then
             ...
         end

It depends on how you group your rules in files.

> These files have to have this specific name and the name cannot change 
> because the java code use this name to load the drl file in the session.
You can also access compiled binary package by a snapshot name.
Or if you have one single set of rules, create a single KB and provide 
methods that create new session ans add the specific control fact (not 
sure of the exact syntax, just to show the idea) :
     task1() {
         session = getKb().newStatelessSession();
         session.insert(new Exec("task1")
         ...
         session.execute(...)
     }
     task2() {
         session = getKb().newStatelessSession();
         session.insert(new Exec("task2")
         ...
         session.execute(...)
     }
and you can obviously make that generic ...


>
> To put each rule in its specific file, do i have to create a package 
> per file and name the package with the name of the file i want? And 
> copy Enum and DSL in each package or can i put this in global?
Don't know if global can contains Enum and DSL. I think it can only 
contain rules

>
> To use the Test Scenario, do you know if we have to do special things? 
> I tried to add Maps in the Given part and run the scenario but i get 
> an error ; "unable to find constructor for java.util.Map" and the same 
> if i put a boolean, string...   Is the Guvnor Test Scenario not able 
> to find java class and how to make it reachable?
> I have already tried Test Scenario with adding object for which i gave 
> a Pojo but never with basic java type.
Don't known, sorry.

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