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simple_echo_server.py
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62 lines (46 loc) · 1.8 KB
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"""
simple_echo_server.py
Copyright (c) 2016-2019 Alan Yorinks All right reserved.
Python Banyan is free software; you can redistribute it and/or
modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
Version 3 as published by the Free Software Foundation; either
or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU AFFERO GENERAL PUBLIC LICENSE
along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
"""
import sys
from python_banyan.banyan_base import BanyanBase
class EchoServer(BanyanBase):
"""
This class is a simple Banyan echo server
"""
def __init__(self, ):
# initialize the parent
super(EchoServer, self).__init__(process_name='EchoServer')
# subscribe to receive 'echo' messages from the client
self.set_subscriber_topic('echo')
# wait for messages to arrive
try:
self.receive_loop()
except KeyboardInterrupt:
self.clean_up()
sys.exit(0)
def incoming_message_processing(self, topic, payload):
"""
Process incoming messages from the client
:param topic: message topic
:param payload: message payload
"""
# republish the message with a topic of reply
self.publish_payload(payload, 'reply')
# extract the message number from the payload
print('Message number:', payload['message_number'])
def echo_server():
EchoServer()
if __name__ == '__main__':
echo_server()