[rules-users] Globals from functions...

[Wolfgang Laun]

Global "variables" aren't plain old Java variables; they are kept in a
wrapped map. Functions are passed to a Java compiler "as is", with only the
import list added to the compilation unit.

So you can use a global in a DRL function

   - by passing it as a parameter,
   - by accessing the global via the interface org.drools.runtime.Globals,
   which requires that you have the session object available so you can do
   kSession.getGlobals().

The second option brings us back to square 1: you can't use a global... But
a public static from any application class might be used - imports are
available in functions. Which, after all, could be used for your 'x' in the
first place.

-W





On 21 July 2011 00:13, bob.breitling <bob.breitling at rrd.com> wrote:

> I have a global defined and I am trying to use it from a function.  When my
> rule gets loaded into my knowledge base, I always get an error complaining
> about the global not being resolved.
>
> ---- simplified snippet ----
>
> global int x;
>
> function void foo(int n) {
>    x = n;
> }
>
> ------------------------------
>
> I get this kind of error "Function Compilation error: foo (line:20) x can
> not resolved".
>
> Should this work?
>
> TIA,
>
> Bob
>
> --
> View this message in context:
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