[rules-users] BRMS 4.0.2 issues

[Mark Proctor]

Log these, with specifics, in a JIRA. mails are forgotten about 2 days 
later.

Mark
jboss-rules.philv at xoxy.net wrote:
> I'm pretty new to Drools and I think the BRMS in 4.0.2 is great. I've
> encountered a few issues that I wanted to bring up. I can put some or
> all of these into JIRA if that's best, but I wanted to bring them up
> here first in case it's just user error on my part.
>
> === Issue #1 ===
> For our project we want to use a DSL in the BRMS. The error messages
> that are shown when you click "Validate" when editing a business rule
> that uses a DSL in the BRMS are not user-friendly at all. If I make a
> small typo and misspell the name of an attribute (a very likely thing
> for a BRMS user to do), and click the Validate button, the error I get
> back is a big stack trace starting with "java.lang.RuntimeException:
> SNO: Conversion failed at
> org.codehaus.janino.UnitCompiler.numericPromotion(UnitCompiler.java)
> at …" Nowhere in that stack trace is anything that gives a hint that
> the error is just a typo of an attribute name.
>
> Contrast this with the rather helpful error message I get if I make
> the same typo when editing a DRL rule: "Unable to create Field
> Extractor for 'overtimHours'". (The error is that I misspelled
> overtimeHours). Is it possible to get the same type of helpful error
> messages on validation when editing a DSL rule?
>
> Just to be clear, I'm talking about the rules that use the DSL (which
> I want our business users to edit), not the DSL grammar itself (which
> will be modified by developers).
>
> === Issue #2 ===
> The BRMS doesn't allow rules to have an apostrophe character in them.
> I stumbled into this one when I attempted to import a .drl file where
> the first rule was named "Set employee's minimum wage". This .drl file
> works fine outside the BRMS.
>
> Here's the first few lines of the rule file:
> --------------------------
> package com.example
>
> import com.example.Employee;
> import function com.example.RuleHelper.logNumber;
>
> expander Wage.dsl
>
> rule "Set employee's minimum wage"
>   when
> --------------------------
>
> When I try to import it into the BRMS I got a very strange error back
> (including the <pre> tags): "Unable to import into the package.
> [<pre>Unable to process import: javax.jcr.RepositoryException: failed
> to resolve path Set employee's minimum wage relative to
> /drools:repository/drools:package_area/com.soi/assets: Invalid name:
> Set employee's minimum wage: Invalid name: Set employee's minimum
> wage</pre>]".
>
> Later when I tried to manually enter the rules in that file through
> the BRMS I figured out the real cause was the ' character in the rule
> name. I was unable to create a rule with an apostrophe in the name.
> The error stack trace says "An error occurred executing the action.
> Details
> com.google.gwt.user.client.rpc.SerializableException:
> javax.jcr.RepositoryException: failed to resolve path Set employee's
> minimum wage relative to
> /drools:repository/drools:package_area/com.example/assets: Invalid
> name: Set employee's minimum wage: Invalid name: Set employee's
> minimum wage at
> org.drools.brms.server.ServiceImplementation.createNewRule(ServiceImplementation.java:166)..."
>
> === Issue #3 ===
> I've developed a DSL for my project, and as recommended in the
> documentation (section 6.7.3) I renamed my .drl files to .dslr. When I
> started to use the BRMS, I was not able to import a file with a .dslr
> extension. Renaming the file to .drl worked around the problem. I
> think the BRMS should allow importing of .dslr files.
>
> === Issue #4 ===
> This one is pretty minor. When creating a new rule asset through the
> BRMS using the type "Business rule using a DSL (text editor)", the
> initial description you put in is ignored. You always get the
> description "A dsl is a language mapping from a domain specific
> language to the rule language."
>
> As I said, I'm happy to create JIRA tickets for all of the above if
> that's what you'd like. I'm pretty new to Drools, so I thought I'd
> post the issues here first for feedback.
>
> Thanks,
> Phil
>
> _______________________________________________
> rules-users mailing list
> rules-users at lists.jboss.org
> https://lists.jboss.org/mailman/listinfo/rules-users
>
>
>