Timers

# tick_service.py

from isc.server import Node, expose, local_timer

class TickerService(object):
    name = 'ticker'

    def __init__(self):
        """
        WARNING:
        Do NOT do this in real projects. (I'm speaking about local state
        which is represented by `self.ticks` attribute here.)

        Services MUST be stateless.
        This dirty trick right here is used just to demonstrate
        how the timer works without involving any external storage.

        In real project:
        - ALWAYS database or any other external storage instead of `self`
        - NEVER mutate service object.

        So in real project you would have done something like this:
        self.db_conn = SomeDatabaseConnection()
        # ...
        spam = next(self.db_conn.query('SELECT spam;').fetchone(), None)
        """

        self.ticks = 0

    @expose
    def get_ticks(self, id):
        return self.ticks

    @expose
    def reset_ticks(self):
        self.ticks = 0

    @local_timer(timeout=5)
    def local_timer(self):
        self.ticks += 1


node = Node()
node.register_service(TickerService())
try:
    node.run()
except KeyboardInterrupt:
    node.stop()

# app.py

from isc.client import Client
from time import sleep

client = Client()

client.ticker.reset_ticks()
print(client.ticker.get_ticks())  # prints 0

sleep(10)
print(client.ticker.get_ticks())  # prints 2

sleep(10)
print(client.ticker.get_ticks())  # prints 4

client.ticker.reset_ticks()
print(client.ticker.get_ticks())  # prints 0

sleep(10)
print(client.ticker.get_ticks())  # prints 2