Asynchronous COMET query with Tornado and Prototype

Question

I\'m trying to write simple web application using Tornado and JS Prototype library. So, the client can execute long running job on server. I wish, that this job runs Asynchronou

Answer 1

Tornado is single-threaded web server. Your while loop in wait_for_smith method is blocking Tornado.

You can rewrite that method like this:

def wait_for_smth(self, callback, t=10):
    if t:
        print "Sleeping 2 second, t=%s" % t
        tornado.ioloop.IOLoop.instance().add_timeout(time.time() + 2, lambda: self.wait_for_smth(callback, t-1))
    else:
        callback()

You need to add import time at the top to make this work.