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base.py
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base.py
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import zmq
class ZmqBasePlugin:
"""ZMQ Base plugin to implement sender/receiver plugins
"""
def __init__(self, configuration):
self.configuration = configuration
self.recv_server = configuration['ZmqReceiver']['IP']
self.recv_port = configuration['ZmqReceiver']['Port']
self.send_server = configuration['ZmqSender']['IP']
self.send_port = configuration['ZmqSender']['Port']
print('Loaded plugin {}'.format(self.__class__.__name__))
def on_receive(self, *args):
"""Called on receving a message
"""
print('on_receive is not implemented in {}'.format(
self.__class__.__name__))
pass
def send_ack(self, socket, *args):
"""Sends acknowledgement. Called after `process`
Args:
socket (socket): `ZMQ` socket
"""
print('send_ack is not implemented in {}'.format(self.__class__.__name__))
# Send acknowlede
socket.send(b'Ack')
def process(self, *args):
"""Processes the message. Called after `on_receive`
"""
print('process is not implemented in {}'.format(self.__class__.__name__))
pass
def start_receiver(self, *args):
"""Starts the main reciver loop
"""
print('Starting receiver thread for ZMQ in {}...'.format(
self.__class__.__name__))
context = zmq.Context()
socket = context.socket(zmq.REP)
print('Binding to {}'.format(self.recv_server))
socket.bind('tcp://*:{}'.format(self.recv_port))
while True:
# Wait for next request from client
message = socket.recv()
self.on_receive(message)
self.process(message)
self.send_ack(socket)
def start_sender(self, *args):
"""Starts the main sender loop
"""
context = zmq.Context()
socket = context.socket(zmq.REQ)
socket.connect('tcp://{}:{}'.format(self.send_server, self.send_port))
self.send(socket)
self.on_ack(socket)
def send(self, socket, *args):
"""Sends a message
Args:
socket (socket): `ZMQ` socket
"""
print('send is not implemented in {}'.format(self.__class__.__name__))
msg = 'no_implemented'
print('Sending message {} to server {}:{}'.format(msg, self.send_server, self.send_port))
socket.send_string(msg)
def on_ack(self, socket, *args):
"""Prases ack message. Called after `send`
Args:
socket (socket): `ZMQ` socket
"""
print('on_ack is not implemented in {}'.format(self.__class__.__name__))
# Send acknowlede
# Get the reply.
response = socket.recv()
print('Received response: {}'.format(response))