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from .actor import Actor, _queue_name_re | ||
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class Registry: | ||
''' | ||
A Registry allows defining a collection of Actors not directly bound to a Broker. | ||
This allows your code to declar Actors before configuring a Broker. | ||
''' | ||
def __init__(self): | ||
self.actors = {} | ||
self.broker = None | ||
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def actor(self, fn=None, *, actor_class=Actor, actor_name=None, queue_name="default", priority=0, **options): | ||
''' | ||
Mimics `actor.actor` decorator, but skips the actor options check, and passes `self` as broker. | ||
''' | ||
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def decorator(fn): | ||
if not _queue_name_re.fullmatch(queue_name): | ||
raise ValueError( | ||
"Queue names must start with a letter or an underscore followed " | ||
"by any number of letters, digits, dashes or underscores." | ||
) | ||
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return actor_class( | ||
fn, | ||
actor_name=actor_name or fn.__name__, | ||
queue_name=queue_name, | ||
priority=priority, | ||
broker=self, | ||
options=options, | ||
) | ||
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if fn is None: | ||
return decorator | ||
return decorator(fn) | ||
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def __getattr__(self, name): | ||
# Proxy everything else to our Broker, if set. | ||
return getattr(self.broker, name) | ||
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def declare_actor(self, actor): | ||
''' | ||
Intercept when Actor class tries to register itself. | ||
''' | ||
if self.broker: | ||
self.broker.declare_actor(actor) | ||
else: | ||
self.actors[actor.actor_name] = actor | ||
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def bind_broker(self, broker): | ||
self.broker = broker | ||
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for actor_name, actor in self.actors.items(): | ||
invalid_options = set(actor.options) - broker.actor_options | ||
if invalid_options: | ||
invalid_options_list = ", ".join(invalid_options) | ||
raise ValueError(( | ||
"Actor %s specified the following options which are not " | ||
"supported by this broker: %s. Did you forget to add a " | ||
"middleware to your Broker?" | ||
) % (actor_name, invalid_options_list)) | ||
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broker.declar_actor(actor) |