How do I stop Tornado web server?

Question

I\'ve been playing around a bit with the Tornado web server and have come to a point where I want to stop the web server (for example during unit testing). The following sim

Answer 1

Here is the solution how to stop Torando from another thread. Schildmeijer provided a good hint, but it took me a while to actually figure the final example that works.

Please see below:

import threading
import tornado.ioloop
import tornado.web
import time


class MainHandler(tornado.web.RequestHandler):
    def get(self):
        self.write("Hello, world!\n")

def start_tornado(*args, **kwargs):
    application = tornado.web.Application([
        (r"/", MainHandler),
    ])
    application.listen(8888)
    print "Starting Torando"
    tornado.ioloop.IOLoop.instance().start()
    print "Tornado finished"

def stop_tornado():
    ioloop = tornado.ioloop.IOLoop.instance()
    ioloop.add_callback(ioloop.stop)
    print "Asked Tornado to exit"

def main():

    t = threading.Thread(target=start_tornado)  
    t.start()

    time.sleep(5)

    stop_tornado()
    t.join()

if __name__ == "__main__":
    main()