testShareDataMultiProcess.py

import tornado.web
import tornado.httpserver
import os


class PageOneHandler(tornado.web.RequestHandler):
    def get(self):
        self.write(str(self.application.configs) + "\n")

    def post(self):
        p = int(self.get_argument("p"))
        self.application.configs["some_data"] = p
        self.write(str(self.application.configs) + "\n")


class PageTwoHandler(tornado.web.RequestHandler):

    def get(self):
        self.write(str(self.application.configs) + "\n")

    def post(self):
        p = int(self.get_argument("p"))
        self.application.configs["some_data"] = p
        self.write(str(self.application.configs) + "\n")


class MyApplication(tornado.web.Application):
    def __init__(self, configs):
        handlers = [
            ('/pageone', PageOneHandler),
            ('/pagetwo', PageTwoHandler)
        ]
        settings = dict(
            template_path='/templates',
            static_path='/static',
            debug=False)

        self.configs = configs
        tornado.web.Application.__init__(self, handlers, **settings)


# Run the instance
application = MyApplication({
    'some_data': 1,  # etc.
})

http_server = tornado.httpserver.HTTPServer(application)


def update_configs():
    print(os.getpid(), " updating", str(application.configs))


http_server.bind(8888)
http_server.start(2)
# Callback function to update configs
some_time_period = 1000  # Once an second
tornado.ioloop.PeriodicCallback(update_configs, some_time_period).start()
tornado.ioloop.IOLoop.instance().start()