baseimage-tutorial-framework/lib/tfw/networking/server_connector.py

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# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
# All Rights Reserved. See LICENSE file for details.
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from functools import partial
import zmq
from zmq.eventloop.zmqstream import ZMQStream
from tfw.config import TFWENV
from tfw.config.logs import logging
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from .scope import Scope
from .serialization import serialize_tfw_msg, with_deserialize_tfw_msg
from .zmq_connector_base import ZMQConnectorBase
LOG = logging.getLogger(__name__)
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class ServerDownlinkConnector(ZMQConnectorBase):
def __init__(self, zmq_context=None):
super(ServerDownlinkConnector, self).__init__(zmq_context)
self._zmq_sub_socket = self._zmq_context.socket(zmq.SUB)
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self._zmq_sub_socket.connect(f'tcp://localhost:{TFWENV.PUBLISHER_PORT}')
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self._zmq_sub_socket.setsockopt(zmq.RCVHWM, 0)
self._zmq_sub_stream = ZMQStream(self._zmq_sub_socket)
self.subscribe = partial(self._zmq_sub_socket.setsockopt_string, zmq.SUBSCRIBE)
self.unsubscribe = partial(self._zmq_sub_socket.setsockopt_string, zmq.UNSUBSCRIBE)
def register_callback(self, callback):
callback = with_deserialize_tfw_msg(callback)
self._zmq_sub_stream.on_recv(callback)
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def close(self):
self._zmq_sub_stream.close()
class ServerUplinkConnector(ZMQConnectorBase):
def __init__(self, zmq_context=None):
super(ServerUplinkConnector, self).__init__(zmq_context)
self._zmq_push_socket = self._zmq_context.socket(zmq.PUSH)
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self._zmq_push_socket.connect(f'tcp://localhost:{TFWENV.RECEIVER_PORT}')
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self._zmq_push_socket.setsockopt(zmq.SNDHWM, 0)
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def send_message(self, message, scope=Scope.ZMQ):
message['scope'] = scope.value
self._zmq_push_socket.send_multipart(serialize_tfw_msg(message))
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def close(self):
self._zmq_push_socket.close()
class ServerConnector(ServerUplinkConnector, ServerDownlinkConnector):
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def close(self):
ServerUplinkConnector.close(self)
ServerDownlinkConnector.close(self)