A tornado application implementation compatible with circus sockets.
As tornado is not WSGI complient, we cannot use chaussette to run tornado applications with circus sockets.
This project package a compatible version of tornado Application so you can easily run tornado with all circus awesomeness.
Let's take a simple example, the hello world:
import tornado.ioloop
import tornado.web
from tornado.web import Application
class MainHandler(tornado.web.RequestHandler):
def get(self):
self.write("Hello, world")
application = Application([
(r"/", MainHandler),
])
if __name__ == "__main__":
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()If you want to run it with circus, you can't use socket web and fallback to launch them and let it bind its socket:
[watcher:hello]
cmd = python hello_world.pyBut good news, with circus_tornado, it's no longer true. Just import Application from circus_tornado package:
import tornado.ioloop
import tornado.web
from tornado_circus import Application
class MainHandler(tornado.web.RequestHandler):
def get(self):
self.write("Hello, world")
application = Application([
(r"/", MainHandler),
])
if __name__ == "__main__":
parse_command_line()
application.listen(8888)
tornado.ioloop.IOLoop.instance().start()One last requirement, you must call tornado.options.parse_command_line before calling application.listen or it will doesn't works.
And finally the circus configuration:
[watcher:hello]
cmd = python hello_world.py --fd=$(circus.sockets.hello)
use_sockets = True
[socket:hello]
host = 127.0.0.1
port = 9000And you're done. You can go to http://localhost:9000 to check if it works.
You can even launch a quick benchmark and check that it holds the load:
$> boom -n 10000 -c 100 http://localhost:9000 10:38:48
Server Software: TornadoServer/2.4.1
Running GET http://127.0.0.1:9000
Host: localhost
Running 10000 times per 100 workers.
Starting the load [===...===] Done
-------- Errors --------
-------- Results --------
Successful calls 10000
Total time 9.3364 s
Average 0.0656 s
Fastest 0.0228 s
Slowest 0.1009 s
Amplitude 0.0781 s
RPS 1071
BSI Woooooo Fast
-------- Status codes --------
Code 200 10000 times.
-------- Legend --------
RPS: Request Per Second
BSI: Boom Speed Index
