examples/python/reactor/scheduling.py

#!/usr/bin/python
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from __future__ import print_function
import time
from proton.reactor import Reactor

class Program:

    def on_reactor_init(self, event):
        self.start = time.time()
        print("Hello, World!")

        # We can schedule a task event for some point in the future.
        # This will cause the reactor to stick around until it has a
        # chance to process the event.

        # The first argument is the delay. The second argument is the
        # handler for the event. We are just using self for now, but
        # we could pass in another object if we wanted.
        task = event.reactor.schedule(1.0, self)

        # We can ignore the task if we want to, but we can also use it
        # to pass stuff to the handler.
        task.something_to_say = "Yay"

    def on_timer_task(self, event):
        task = event.context # xxx: don't have a task property on event yet
        print(task.something_to_say, "my task is complete!")

    def on_reactor_final(self, event):
        print("Goodbye, World! (after %s long seconds)" % (time.time() - self.start))

r = Reactor(Program())
r.run()