[rules-users] Bugs in rule templates?
Bruno Freudensprung
bruno.freudensprung at temis.com
Thu Nov 3 09:21:28 EDT 2011
Hi Wolfgang,
Sure. Please find attached a small Maven/Eclipse project containing 3
DRT and 3 unit test cases (Java in src/test/java/org/drools/bug, rules
in src/test/resource/org/drools/bug) :
* Test1OK(.java/.drt/.csv) is the one working well
* Test1KO(.java/.drt/.csv) is the one illustrating the 1) behavior
* Test1KO2(.java/.drt/.csv) is the one illustrating the 2) behavior
Regards,
Bruno.
Le 03/11/2011 14:07, Wolfgang Laun a écrit :
> Before you work on a JIRA could you please provide an (abbreviated)
> example of a template that causes both errors?
> -W
>
> 2011/11/3 Bruno Freudensprung <bruno.freudensprung at temis.com
> <mailto:bruno.freudensprung at temis.com>>
>
> Hi all,
>
> I am writing rules using Drools Templates and I noticed strange
> problems (ocurring when I slightly modify a DRT that works well):
>
> 1. the template instanciation depends on the declarations order
> of the parameters in the template header
> 2. if the rule template does not contain a package declaration
> (default package) the instanciation of the template fails
>
> I am working with Drools 5.1.1 but those problems occur in
> 5.2.0.Final and in 5.3.0.Final as well.
> Do you think it is worth posting a JIRA?
>
> Anyway let me tell you that Drools Templates are great! Our users
> like that feature a lot! They start writing a rule in DRL format
> and, once it works, they transform it into a DRT and put data into
> a tsv file. It is quite a natural way of working. The general
> perception here is that it is easier to "templatize" an existing
> DRL than to write a decision table from scratch.
>
> Best regards,
>
> Bruno.
>
> PS:
>
> _DRT that works well_:
>
> template header
> *name
> message
>
> package templates;
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
> _DRT that does not work_ (first case):
>
> template header
> *message
> name
>
> package templates;
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
>
> _DRT that does not work_ (second case):
>
> template header
> *name
> message
> *
> import org.drools.bug.Entity;
>
> template "TestTemplate"
> rule "Test1 @{row.rowNumber}"
> dialect "mvel"
> when
> Entity( $name : name == "@{name}" )
> then
> System.out.println("@{message}" + $name);
> insert($name);
> end
> end template
>
>
>
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