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Add subscription management to ComponentBase

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This commit is contained in:
Bálint Bokros 2017-11-27 18:34:26 +01:00
parent 1d5abaaea0
commit 726fc165b0
1 changed files with 18 additions and 1 deletions
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19
src/components/component_base.py
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@ -14,7 +14,8 @@ class ComponentBase:
self.event_handler = event_handler
self.zmq_context = zmq_context or zmq.Context.instance()
self.zmq_sub_socket = self.zmq_context.socket(zmq.SUB)
self.zmq_sub_socket.setsockopt_string(zmq.SUBSCRIBE, anchor)
self.subscriptions = {self.anchor}
self.zmq_sub_socket.setsockopt_string(zmq.SUBSCRIBE, self.anchor)
self.zmq_sub_socket.connect('tcp://localhost:{}'.format(PUBLISHER_PORT))
self.zmq_sub_stream = ZMQStream(self.zmq_sub_socket)
self.zmq_push_socket = self.zmq_context.socket(zmq.PUSH)
@ -29,3 +30,19 @@ class ComponentBase:
encoded_message = json.dumps(message).encode('utf-8')
self.zmq_push_socket.send_multipart([encoded_anchor, encoded_message])
def subscribe(self, anchor):
if anchor not in self.subscriptions:
self.subscriptions.add(anchor)
self.zmq_sub_socket.setsockopt_string(zmq.SUBSCRIBE, anchor)
def unsubscribe(self, anchor):
try:
self.subscriptions.remove(anchor)
self.zmq_sub_socket.setsockopt_string(zmq.UNSUBSCRIBE, anchor)
except KeyError:
pass
def unsubscribe_all(self):
for sub in self.subscriptions:
self.zmq_sub_socket.setsockopt_string(zmq.UNSUBSCRIBE, sub)
self.subscriptions.clear()