I am looking to build a daemon process that does some tasks when given some input. 99% of the time it lays silent on the background doing nothing and the tasks are short and few in number. How would I build the interface between two applications one of which constructs the task and the daemon that executes it?
I was thinking that the daemon might have a folder which i periodically checks. If there are some files in there, it reads it and follows instructions from there.
Would that work well or is there a better way?
EDIT: added example daemon code.
#!/usr/bin/python
import time
from daemon import runner
class Daemon():
def __init__(self):
self.stdin_path = '/dev/null'
self.stdout_path = '/dev/tty'
self.stderr_path = '/dev/tty'
self.pidfile_path = '/tmp/foo.pid'
self.pidfile_timeout = 5
self.task_dir = os.path.expanduser("~/.todo/daemon_tasks/")
def run(self):
while not time.sleep(1):
if len(os.listdir(self.task_dir)) == 0:
for task in os.listdir(self.task_dir):
self.process_task(task)
def process_task(self, task):
# input: filename
# output: void
# takes task and executes it according to instructions in the file
pass
if __name__ == '__main__':
app = Daemon()
daemon_runner = runner.DaemonRunner(app)
daemon_runner.do_action()
