def default_handlers(self):
"""The map of default event handlers described by this listener
"""
return {evname: cb for evname, cbtype, cb in marks.get_callbacks(
self, skip=('default_handlers',), only='handler')}
def default_handlers(self):
"""The map of default event handlers described by this listener
"""
return {evname: cb for evname, cbtype, cb in marks.get_callbacks(
self, skip=('default_handlers',), only='handler')}
def load_app(self, ns, on_value=None, **prepost_kwargs):
"""Load annotated callbacks and from a namespace and add them
to this client's listener's callback chain.
:param ns: A namespace-like object containing functions marked with
@event_callback (can be a module, class or instance).
:params str on_value: id key to be used for registering app callbacks
with `EventListener`
"""
listener = self.listener
name = utils.get_name(ns)
app = self._apps.get(name, None)
if not app:
# if handed a class, instantiate appropriately
app = ns() if isinstance(ns, type) else ns
prepost = getattr(app, 'prepost', False)
if prepost:
args, kwargs = utils.get_args(app.prepost)
funcargs = tuple(weakref.proxy(getattr(self, argname))
for argname in args if argname != 'self')
ret = prepost(*funcargs, **prepost_kwargs)
if inspect.isgenerator(ret):
# run init step
next(ret)
app._finalize = ret
# assign a 'consumer id'
cid = on_value if on_value else utils.uuid()
self.log.info("Loading call app '{}' for listener '{}'"
.format(name, listener))
icb, failed = 1, False
# insert handlers and callbacks
for ev_type, cb_type, obj in marks.get_callbacks(app):
if cb_type == 'handler':
# TODO: similar unloading on failure here as above?
listener.add_handler(ev_type, obj)
elif cb_type == 'callback':
# add default handler if none exists
if ev_type not in listener._handlers:
self.log.info(
"adding default session lookup handler for event"
" type '{}'".format(ev_type)
)
listener.add_handler(
ev_type,
listener.lookup_sess
)
added = listener.add_callback(ev_type, cid, obj)
if not added:
failed = obj
listener.remove_callbacks(cid, last=icb)
break
icb += 1
self.log.debug("'{}' event callback '{}' added for id '{}'"
.format(ev_type, obj.__name__, cid))
if failed:
raise TypeError("app load failed since '{}' is not a valid"
"callback type".format(failed))
# register locally
self._apps[name] = app
app.cid, app.name = cid, name
return app.cid
def load_app(self, ns, on_value=None, **prepost_kwargs):
"""Load annotated callbacks and from a namespace and add them
to this client's listener's callback chain.
:param ns: A namespace-like object containing functions marked with
@event_callback (can be a module, class or instance).
:params str on_value: id key to be used for registering app callbacks
with `EventListener`
"""
listener = self.listener
name = utils.get_name(ns)
if name not in self._apps:
# if handed a class, instantiate appropriately
app = ns() if isinstance(ns, type) else ns
prepost = getattr(app, 'prepost', False)
if prepost:
args, kwargs = utils.get_args(app.prepost)
funcargs = tuple(weakref.proxy(getattr(self, argname))
for argname in args if argname != 'self')
ret = prepost(*funcargs, **prepost_kwargs)
if inspect.isgenerator(ret):
# run init step
next(ret)
app._finalize = ret
# assign a 'consumer id'
cid = on_value if on_value else utils.uuid()
self.log.info("Loading call app '{}' for listener '{}'"
.format(name, listener))
icb, failed = 1, False
# insert handlers and callbacks
for ev_type, cb_type, obj in marks.get_callbacks(app):
if cb_type == 'handler':
# TODO: similar unloading on failure here as above?
listener.add_handler(ev_type, obj)
elif cb_type == 'callback':
# add default handler if none exists
if ev_type not in listener._handlers:
self.log.info(
"adding default session lookup handler for event"
" type '{}'".format(ev_type)
)
listener.add_handler(
ev_type,
listener.lookup_sess
)
added = listener.add_callback(ev_type, cid, obj)
if not added:
failed = obj
listener.remove_callbacks(cid, last=icb)
break
icb += 1
self.log.debug("'{}' event callback '{}' added for id '{}'"
.format(ev_type, obj.__name__, cid))
if failed:
raise TypeError("app load failed since '{}' is not a valid"
"callback type".format(failed))
# register locally
self._apps[name] = app
app.cid, app.name = cid, name
return cid
