examples/ping_pong_ns/ping_pong_ns/start_ping.py

   1 #!/usr/bin/env python
   2 #
   3 #   Copyright 2016 RIFT.IO Inc
   4 #
   5 #   Licensed under the Apache License, Version 2.0 (the "License");
   6 #   you may not use this file except in compliance with the License.
   7 #   You may obtain a copy of the License at
   8 #
   9 #       http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 #   Unless required by applicable law or agreed to in writing, software
  12 #   distributed under the License is distributed on an "AS IS" BASIS,
  13 #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 #   See the License for the specific language governing permissions and
  15 #   limitations under the License.
  16 #
  17
  18 import argparse
  19 import signal
  20 import logging
  21
  22 import tornado
  23 import tornado.httpserver
  24
  25 from ping import (
  26     Ping,
  27     PingAdminStatusHandler,
  28     PingServerHandler,
  29     PingRateHandler,
  30     PingStatsHandler,
  31 )
  32 from util.util import (
  33     VersionHandler,
  34 )
  35
  36 logging.basicConfig(level=logging.DEBUG,
  37                     format='(%(threadName)-10s) %(name)-8s :: %(message)s',
  38 )
  39
  40 def main():
  41     log = logging.getLogger("main")
  42
  43     # parse arguments
  44     parser = argparse.ArgumentParser()
  45     parser.add_argument(
  46         "--ping-manager-port",
  47         required=False,
  48         default="18888",
  49         help="port number for ping")
  50
  51     arguments = parser.parse_args()
  52
  53     # setup application
  54     log.debug("setup application")
  55     ping_instance = Ping()
  56     ping_application_arguments = {'ping_instance': ping_instance}
  57     ping_application = tornado.web.Application([
  58         (r"/api/v1/ping/stats", PingStatsHandler, ping_application_arguments),
  59         (r"/api/v1/ping/adminstatus/([a-z]+)", PingAdminStatusHandler, ping_application_arguments),
  60         (r"/api/v1/ping/server/?([0-9a-z\.]*)", PingServerHandler, ping_application_arguments),
  61         (r"/api/v1/ping/rate/?([0-9]*)", PingRateHandler, ping_application_arguments),
  62         (r"/version", VersionHandler, ping_application_arguments)
  63     ])
  64     ping_server = tornado.httpserver.HTTPServer(
  65         ping_application)
  66
  67     # setup SIGINT handler
  68     log.debug("setup SIGINT handler")
  69     def signal_handler(signal, frame):
  70         print("") # print newline to clear user input
  71         log.info("Exiting")
  72         ping_instance.stop()
  73         ping_server.stop()
  74         log.info("Sayonara!")
  75         quit()
  76
  77     signal.signal(signal.SIGINT, signal_handler)
  78
  79     # start
  80     log.debug("start")
  81     try:
  82         ping_server.listen(arguments.ping_manager_port)
  83     except OSError:
  84         print("port %s is already is use, exiting" % arguments.ping_manager_port)
  85         return
  86
  87     tornado.ioloop.IOLoop.instance().start()
  88
  89 if __name__ == "__main__":
  90     main()
  91
  92