Last active
April 24, 2023 17:59
-
-
Save lbolla/4594879 to your computer and use it in GitHub Desktop.
Tornado and concurrent.futures
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
from concurrent.futures import ThreadPoolExecutor | |
from functools import partial, wraps | |
import time | |
import tornado.ioloop | |
import tornado.web | |
EXECUTOR = ThreadPoolExecutor(max_workers=4) | |
def unblock(f): | |
@tornado.web.asynchronous | |
@wraps(f) | |
def wrapper(*args, **kwargs): | |
self = args[0] | |
def callback(future): | |
self.write(future.result()) | |
self.finish() | |
EXECUTOR.submit( | |
partial(f, *args, **kwargs) | |
).add_done_callback( | |
lambda future: tornado.ioloop.IOLoop.instance().add_callback( | |
partial(callback, future))) | |
return wrapper | |
class MainHandler(tornado.web.RequestHandler): | |
def get(self): | |
self.write("Hello, world %s" % time.time()) | |
class SleepHandler(tornado.web.RequestHandler): | |
@unblock | |
def get(self, n): | |
time.sleep(float(n)) | |
return "Awake! %s" % time.time() | |
class SleepAsyncHandler(tornado.web.RequestHandler): | |
@tornado.web.asynchronous | |
def get(self, n): | |
def callback(future): | |
self.write(future.result()) | |
self.finish() | |
EXECUTOR.submit( | |
partial(self.get_, n) | |
).add_done_callback( | |
lambda future: tornado.ioloop.IOLoop.instance().add_callback( | |
partial(callback, future))) | |
def get_(self, n): | |
time.sleep(float(n)) | |
return "Awake! %s" % time.time() | |
application = tornado.web.Application([ | |
(r"/", MainHandler), | |
(r"/sleep/(\d+)", SleepHandler), | |
(r"/sleep_async/(\d+)", SleepAsyncHandler), | |
]) | |
if __name__ == "__main__": | |
application.listen(8888) | |
tornado.ioloop.IOLoop.instance().start() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment