def __init__(self, client, sink, queue_name=None):
log.Logger.__init__(self, client)
self._client = client
self._sink = ISink(sink)
self._bindings = []
self._queue = None
self._disconnected = False
self._consume_deferred = None
self._queue_name = queue_name
self.log_name = self._queue_name
class Connection(log.Logger):
support_broadcast = True
def __init__(self, client, sink, queue_name=None):
log.Logger.__init__(self, client)
self._client = client
self._sink = ISink(sink)
self._bindings = []
self._queue = None
self._disconnected = False
self._consume_deferred = None
self._queue_name = queue_name
self.log_name = self._queue_name
def initiate(self):
d = defer.succeed(None)
if self._queue_name is not None:
d.addCallback(defer.drop_param,
self._client.define_queue, self._queue_name)
d.addCallback(self._main_loop)
else:
self.warning('Queue name is None, skipping creating queue '
'and consumer.')
d.addCallback(defer.override_result, self)
return d
### IChannel ###
def post(self, recipients, message):
if not isinstance(message, BaseMessage):
raise ValueError("Expected second argument to be "
"f.a.b.BaseMessage, got %r instead"
% (type(message), ))
recipients = recipient.IRecipients(recipients)
defers = []
for recip in recipients:
self.log('Sending message to %r', recip)
d = self._client.publish(recip.key, recip.route, message)
defers.append(d)
return defer.DeferredList(defers)
def release(self):
self._disconnected = True
if self._consume_deferred and not self._consume_deferred.called:
ex = FinishConnection("Disconnecting")
self._consume_deferred.errback(ex)
return self._client.disconnect()
def bind(self, route, key=None):
recip = recipient.Recipient(key=key, route=route)
exchange_type = 'fanout' if key is None else 'direct'
return PersonalBinding(self, self._queue_name, recip, exchange_type)
def get_bindings(self, route=None):
if route is None:
return list(self._bindings)
return [x for x in self._bindings if x.recipient.route == route]
### protected ###
def _register_binding(self, binding):
self._bindings.append(binding)
def _revoke_binding(self, binding):
self._bindings.remove(binding)
def _define_exchange(self, route, exchange_type="direct"):
return self._client.define_exchange(route, exchange_type)
def _create_binding(self, queue_name, route, key=None):
return self._client.create_binding(route, queue_name, key)
def _delete_binding(self, recipient, queue_name):
route = recipient.route
key = recipient.key
return self._client.delete_binding(route, queue_name, key)
### private ###
def _main_loop(self, queue):
self._queue = queue
def rebind(_):
reactor.callLater(0, bind)
def stop(reason):
if reason.check(FinishConnection):
self.log('Error handler: exiting, reason %r' % reason)
else:
reason.raiseException()
def bind():
if self._disconnected:
return
d = self._consume_queue(queue)
d.addCallbacks(rebind, stop)
bind()
def _consume_queue(self, queue):
def get_and_call_on_message(message):
return self._sink.on_message(message)
self._consume_deferred = queue.get()
self._consume_deferred.addCallback(get_and_call_on_message)
return self._consume_deferred
