[rules-users] Evaluating decision tables from DRL

[Michael Anstis]

Chaining rules, including those in decision tables, can be achieved by
using a transient control fact.

rule "your DRL rule 1"
    when
        YourObject( field == 1 )
    then
        insertLogical( new TransientControlFact( "dtable1" );
end

rule "your DRL rule 2"
    when
        YourObject( field == 2 )
    then
        insertLogical( new TransientControlFact( "dtable2" );
end

Then in the decision table use the transient control fact in an additional
column. The DRL would look like this:-

rule "dtable1 row 1"
    when
        TransientControlFact( dtable = "dtable1" )
        YourOtherFacts( )
    then
        ....
end

rule "dtable1 row 2"
    when
        TransientControlFact( dtable = "dtable2" )
        YourOtherFacts( )
    then
        ....
end

How you retrieve the results from the Decision Tables is up to you (e.g.
queries, globals etc).

With kind regards,

Mike

On 10 October 2012 09:34, Manasi <manasi.a.damle at capgemini.com> wrote:

> Hi,
>
> With Drools I need to execute a DRL first and based on its output value I
> need to evaluate a decision table in guvnor and get the output values.
>
> Please let me know how this can be done.
>
> Thanks,
> Manasi
>
>
>
>
> --
> View this message in context:
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