Daemonizer is simple library (it literally contains one class) to help in daemonization of your apps. I needed it myself to daemonize one of apps I was writing at work and i loved it so much I can't get over it.
I hope you'll like it to!
Daemonizer class works as simple decorator which starts your app in different process and wait in original process for signals to handle exiting of your app gracefully.
It uses 2 signals SIGINT to soft exit and SIGTERM for hard exit to invoke different functions soft_exit and hard_exit respectfully from your app object. If you don't have those your app will just get killed by Process.terminate whick kinda kills the point, so I don't recomend it.
It also allow you to create wait function which will run im original process and wait for signals, you can use it to get progress reports from your app or some kind of heartbeat. If you don't have those it's not a problem Daemonizer will just wait using Process.join().
Yeah sure!
from daemonizer import Daemonizer
from multiprocessing import Event
class MySuperApp():
def __init__(self):
self.flag = Event()
# Argument is optional. Pidfile only get created if you provide it though
@Daemonizer('pidfile.pid')
def run(self):
import time
while 1:
if self.flag.is_set():
break
time.sleep(1)
print("Just do it tomorrow")
def hard_exit(self):
print("Exiting hard way!")
self.flag.set()
def soft_exit(self):
print("Exiting not so hard way!")
import time
time.sleep(3)
print("Ok! It's time to exit!")
self.flag.set()