Hi David,
No plans yet. I often accomplish these sorts of things using a
baseclass/subclass of FSMAction. Hopefully the following (UNTESTED)
code helps you along.
===
OBSERVERS = 'observers'
class ObserverFSMAction(FSMAction):
# this is an abstract base class
def execute(self, context, obj):
self._execute(self, context, obj)
for observer in context.get(OBSERVERS, []):
observer.notify()
def _execute(self, context, obj):
raise NotImplementedError()
class MyFSMAction(ObserverFSMAction):
# use this class in your fsm.yaml
def _execute(self, context, obj):
# actually do stuff and return event
# eg. add an observer
# NOTE: this is truly untested, but it should work
context[OBSERVERS] = context.get(OBSERVERS, []) +
[ObserverImpl(...)]
class Observer(object):
def __init__(self, a_string_to_construct_an_instance_of_observer):
self._observerImpl = # make impl from supplied string
def notify():
self._observerImpl.notify()
class ObserverImpl(Observer):
def __init__(self, *args, **kwargs):
# make a useful observer
def __str__(self): # or maybe __unicode__ is required, can't
recall what webapp does with url params
# return a string that can be used to reconstruct self - maybe
just call __repr__?
def notify():
# do stuff
and in fsm.yaml
context_types:
observers: module.name.of.Observer
This would only act at the FSMAction level, not the state transition
level. Subclasses of FSMContext/FSMState which override .dispatch()
can also be very powerful - but these required bigger changes to the
framework. The previous example can be accomplished out-of-box
On Jun 9, 2:05 pm, David Mora <[email protected]> wrote:
> BTW - any intentions on plugging an observer pattern/plugin around it :) ?
> It would be awesome to have a list of observers watching for change on
> states (subject)
>
> On 9 June 2011 12:22, David Mora <[email protected]> wrote:
>
>
>
>
>
>
>
>
>
> > i'm also using it right now for some moderation flows i need to finish so i
> > will test it too
>
> > On 9 June 2011 10:14, Jason Collins <[email protected]> wrote:
>
> >> @Mike_W, I've updated the docs to describe this new feature.
>
> >> http://code.google.com/p/fantasm/wiki/AdvancedConcepts#Fan-In
>
> >> j
>
> >> On Jun 8, 9:44 pm, Robert Kluin <[email protected]> wrote:
> >> > Hey Shawn,
> >> > Awesome, I'll try to review it tomorrow!
>
> >> > Hopefully Mike is still following this thread and will help us test
> >> > it out. :)
>
> >> > Robert
>
> >> > On Wed, Jun 8, 2011 at 12:03, Shawn <[email protected]> wrote:
> >> > > Hi Robert,
> >> > > Done.http://code.google.com/p/fantasm/source/detail?r=147.
> >> > > Please give it a quick review if you are able.
> >> > > Thanks again.
> >> > > --
> >> > > Shawn
>
> >> > > --
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>
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> > --
> >http://about.me/david.mora
>
> --http://about.me/david.mora
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