backgrounddating.com starttornadoapp management command. This source code is licensed under the terms of the GNU GPL 3.0.

starttornadoapp.py

import signal
import time

import tornado.httpserver
import tornado.ioloop

from django.core.management.base import BaseCommand, CommandError

from privatemessages.tornadoapp import application

class Command(BaseCommand):
    args = '[port_number]'
    help = 'Starts the Tornado application for message handling.'

    def sig_handler(self, sig, frame):
        """Catch signal and init callback"""
        tornado.ioloop.IOLoop.instance().add_callback(self.shutdown)

    def shutdown(self):
        """Stop server and add callback to stop i/o loop"""
        self.http_server.stop()

        io_loop = tornado.ioloop.IOLoop.instance()
        io_loop.add_timeout(time.time() + 2, io_loop.stop)

    def handle(self, *args, **options):
        if len(args) == 1:
            try:
                port = int(args[0])
            except ValueError:
                raise CommandError('Invalid port number specified')
        else:
            port = 8888

        self.http_server = tornado.httpserver.HTTPServer(application)
        self.http_server.listen(port, address="127.0.0.1")

        # Init signals handler
        signal.signal(signal.SIGTERM, self.sig_handler)

        # This will also catch KeyboardInterrupt exception
        signal.signal(signal.SIGINT, self.sig_handler)

        tornado.ioloop.IOLoop.instance().start()