Posted by Rene Single on
URL: https://discuss.orbeon.com/Execution-order-of-generateXXX-Functions-for-Processors-with-multiple-outputs-tp3537744.html

Hi all,


I have a custom processor with multiple outputs A, B & C.

B relies on the output  of A.
C relies on the output of B & A.

I'm wondering if Orbeon can know about this dependency, or if I have to
take care of it myself ?

Say I define my outputs in the Processor in the order A, B, C, will
Orbeon know that for providing C it must run A & B first ?

Or is the order the generateXXX functions are triggered up to the order
in which the outputs are accessed in the calling pipeline ?

So if C is accessed before A and B, Orbeon will only run the generate
function for C of my processor, thus producing unexpected results if I
don't take care of above stated dependency in my implementation ?

If I have to take care of it, would that mean:

    - I need to implement some state in the processor indicating what
has already been done
    - depending on the state, trigger the outstanding actions from each
of the generateXXX functions (of course synchronizing these actions, so
that they are only triggered once)
    - sharing the state via calls to getState(contexthandler) and
setState(contexthandler, state) in the three generate functions ?


Thanks in advance for any pointers

René


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