[rules-users] Template Key in DSL

[Wolfgang Laun]

You could write a DSLR as
   Set the rate of interest to @{tempvar}
and it should expand into
   $loan.setRateOfInterest( @{tempvar} )

And I think that the DSL expander would ignore the template header,
parameter definition and the start and end template lines.

But I'd hate to debug this rule concoction process.

If you use templates, consider the template as a very-high-level DSL
statement, and forget about the DSL expansion.

IMHO, it's a myth that DSLs enable non-programmers to write anything but
trivial (or very simple) rules.

Thanks for the explanation!
Wolfgang



2012/1/5 Michael Anstis <michael.anstis at gmail.com>

> Wolfgang,
>
> I suspect the need arose from within Guvnor.
>
> You can define a DSL sentence such "[then]Set the rate of interest to
> {rex} = $loan.setRateOfInterest( {rex} )
>
> Currently in Guvnor you can only enter literal values for DSL variables
> whereas it'd be good to be able to specify {rex} as a template key so
> multiple rules, based on DSLs, can be generated from the template data. I
> am unsure if drools-expert Templates support interpolation of DSLs.
>
> With kind regards,
>
> Mike
>
> On 5 January 2012 13:10, srinivasasanda <srinivasasanda at gmail.com> wrote:
>
>> Thank you Manstis for quick response.
>>
>> Regards,
>> Srinivas
>>
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