mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-09-19 16:54:10 +00:00
66 lines
2.3 KiB
Python
66 lines
2.3 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
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# All Rights Reserved. See LICENSE file for details.
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from functools import partial
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import zmq
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from zmq.eventloop.zmqstream import ZMQStream
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from tfw.networking import serialize_tfw_msg, with_deserialize_tfw_msg
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from tfw.networking import ZMQConnectorBase
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from tfw.config import TFWENV
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from tfw.config.logs import logging
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LOG = logging.getLogger(__name__)
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class ServerDownlinkConnector(ZMQConnectorBase):
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def __init__(self, zmq_context=None):
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super(ServerDownlinkConnector, self).__init__(zmq_context)
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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_stream = ZMQStream(self._zmq_sub_socket)
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self.subscribe = partial(self._zmq_sub_socket.setsockopt_string, zmq.SUBSCRIBE)
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self.unsubscribe = partial(self._zmq_sub_socket.setsockopt_string, zmq.UNSUBSCRIBE)
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def register_callback(self, callback):
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callback = with_deserialize_tfw_msg(callback)
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self._zmq_sub_stream.on_recv(callback)
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class ServerUplinkConnector(ZMQConnectorBase):
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"""
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Class capable of sending messages to the TFW server and event handlers.
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"""
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def __init__(self, zmq_context=None):
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super(ServerUplinkConnector, self).__init__(zmq_context)
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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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def send_to_eventhandler(self, message):
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"""
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Send a message to an event handler.
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This envelopes the desired message in the 'data' field of the message to
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TFWServer, which will mirror it to event handlers.
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:param message: JSON message you want to send
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:param message['key']: key of event handler you want to address
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"""
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nested_message = {'key': message['key'], 'data': message.pop('data')}
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message['key'] = 'mirror'
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message['data'] = nested_message
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self.send(message)
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def send(self, message):
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"""
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Send a message to the TFW server
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:param message: JSON message you want to send
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"""
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self._zmq_push_socket.send_multipart(serialize_tfw_msg(message))
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class ServerConnector(ServerUplinkConnector, ServerDownlinkConnector):
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pass
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