Thank you Kris for the explanation. It helps.
On Thu, Nov 6, 2008 at 3:42 PM, Kris Verlaenen <
> If I try to set variable that hasn't been declared in the
header - the variables section. I get following error:
> "Could not find variable someVariableName
> Continuing without setting value"
Actually, the problem here is not that you cannot set the value of a
variable that is not defined in the process. It is possible to simply set
the value of a variable on a variable context instance, even if the variable
has not been defined. The problem here however is that variable contexts
can be nested: a composite node can define a sub-context, where the
variables defined in this context are only accessible from inside that
composite node. Whenever you try to set the value of a variable, I must
first search for the right variable scope. This searching is based on the
definition of these variables. At this point, if it cannot find the
variable, it simply does not set the value. There are however other option:
- set the value on the top-level context (i.e. process-level variables)
- set the value on the lowest-level context (the most deeply nested
- allow the user to specify the context
I think I might change the default behaviour to setting the value on the
process-level scope, as that is how I already do it when getting the value
of a variable.
You can also manually select the scope yourself in your action, e.g.
setting to the process-level scope can be done using:
Of course, a Util class could hide these internal structures for you.
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