openStack called from subStack - why ?

[Klaus on-rev]

Hi Rolf,

Am 20.04.2012 um 14:04 schrieb Rolf Kocherhans:

> Hello Jacques
> 
> Thanks for your answer - but….
> 
> I know about the message path and that handlers in the main stack can be used by
> all of it's substacks, I used this feature myself for many years !
> 
> What puzzles me is that an openStack handler in the mainStack gets executed when
> a substack (containing NO CODE at all) is opened ?
> 
> Till today I was thinking openStack handlers are a per stack thing only.

Nope, that's what the message hierarchy is all about! :-)

> I am still confused abut this :-)

If your substack(s) does not have a "pre-/openstack" (etc.) handler but its MAINSTACK does,
then the mainstacks scripts will be executed!

There are several ways to prevent this:
1. Put the (stack scpecific) "pre-/openstack" handler(s) into the script of card 1 of your stack,
it will be executed, but only for htat namely stack.

2. Add a "dummy" script in the substack(s):

on openstack
  ## Nada :-)
end openstack

Dito for PREOPENSTACK if neccessary...

> Cheers
> Rolf

Best

Klaus

--
Klaus Major
http://www.major-k.de
klaus at major.on-rev.com