Hi,
while trying bitbake 1.10 devel branch, I see that some of my old event
handlers won't work anymore. E.g. it is not possible to get value of
${PV} or ${PN} in TaskSucceeded or Failed handlers.
My old event handlers stored information into the local datastore and
relied that event handlers are executed in same context as the executed
task. E.g. I did
| data.setVar('_PKG_RESOURCES_CHLD',
resource.getrusage(resource.RUSAGE_CHILDREN), e.data)
on PkgStarted and evaluated this later in TaskSucceeded to calculate the
consumed resources[1].
As events are fired asynchronously in 1.10 and are evaluated in an own
process, this will not work anymore.
I played a little bit around and created a patch[2] which satisfies my
requirements. But it is very special and situated for my purposes.
I would like to get some kind of synchronous event- (or better: plugin-)
handlers which are executed on top of bb.event.fire(). E.g.
| def fire(event, d):
| """Fire off an Event"""
|
|+ for h in hooks:
|+ ...
|+ h(event, d)
|
| if worker_pid != 0:
| worker_fire(event, d)
These hooks can copy information between 'event' and 'd' and create new
ones..
Is there already planned such a plugin mechanism? What would be the best
way to implement it? Adding e.g. a 'addhook' keyword and continuing like
for 'addhandler'?
Or, am I missing the way how it should be done with 1.10?
Enrico
Footnotes:
[1] see http://ensc.de/bitbake/metrics.txt for results
[2] http://ensc.de/bitbake/0011-metrics.patch
http://ensc.de/bitbake/elito-metrics.bbclass
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