forked from platypush/platypush
154 lines
4.4 KiB
Python
154 lines
4.4 KiB
Python
"""
|
|
Platypush
|
|
|
|
.. moduleauthor:: Fabio Manganiello <blacklight86@gmail.com>
|
|
.. license: MIT
|
|
"""
|
|
|
|
import argparse
|
|
import logging
|
|
import sys
|
|
import traceback
|
|
|
|
from threading import Thread
|
|
|
|
from .bus import Bus
|
|
from .config import Config
|
|
from .context import register_backends
|
|
from .cron.scheduler import CronScheduler
|
|
from .event.processor import EventProcessor
|
|
from .message.event import Event, StopEvent
|
|
from .message.request import Request
|
|
from .message.response import Response
|
|
|
|
|
|
__author__ = 'Fabio Manganiello <blacklight86@gmail.com>'
|
|
__version__ = '0.9'
|
|
|
|
LOGGER = logging.getLogger(__name__)
|
|
|
|
class Daemon:
|
|
""" Main class for the Platypush daemon """
|
|
|
|
# Configuration file (default: either ~/.config/platypush/config.yaml or
|
|
# /etc/platypush/config.yaml
|
|
config_file = None
|
|
|
|
# Application bus. It's an internal queue where:
|
|
# - backends will post the messages they receive
|
|
# - plugins will post the responses they process
|
|
bus = None
|
|
|
|
# backend_name => backend_obj map
|
|
backends = None
|
|
|
|
# number of executions retries before a request fails
|
|
n_tries = 2
|
|
|
|
def __init__(self, config_file=None, requests_to_process=None):
|
|
"""
|
|
Constructor
|
|
Params:
|
|
config_file -- Configuration file override (default: None)
|
|
requests_to_process -- Exit after processing the specified number
|
|
of requests (default: None, loop forever)
|
|
"""
|
|
|
|
self.config_file = config_file
|
|
self.event_processor = EventProcessor()
|
|
self.requests_to_process = requests_to_process
|
|
self.processed_requests = 0
|
|
|
|
Config.init(self.config_file)
|
|
logging.basicConfig(**Config.get('logging'))
|
|
|
|
@classmethod
|
|
def build_from_cmdline(cls, args):
|
|
"""
|
|
Build the app from command line arguments.
|
|
Params:
|
|
args -- Your sys.argv[1:] [List of strings]
|
|
"""
|
|
parser = argparse.ArgumentParser()
|
|
parser.add_argument('--config', '-c', dest='config', required=False,
|
|
default=None, help=cls.config_file.__doc__)
|
|
|
|
opts, args = parser.parse_known_args(args)
|
|
return cls(config_file=opts.config)
|
|
|
|
def on_message(self):
|
|
"""
|
|
Default message handler
|
|
"""
|
|
|
|
def _f(msg):
|
|
"""
|
|
on_message closure
|
|
Params:
|
|
msg -- platypush.message.Message instance
|
|
"""
|
|
|
|
if isinstance(msg, Request):
|
|
try:
|
|
msg.execute(n_tries=self.n_tries)
|
|
except PermissionError:
|
|
LOGGER.info('Dropped unauthorized request: {}'.format(msg))
|
|
|
|
self.processed_requests += 1
|
|
if self.requests_to_process \
|
|
and self.processed_requests >= self.requests_to_process:
|
|
self.stop_app()
|
|
elif isinstance(msg, Response):
|
|
LOGGER.info('Received response: {}'.format(msg))
|
|
elif isinstance(msg, StopEvent) and msg.targets_me():
|
|
LOGGER.info('Received STOP event: {}'.format(msg))
|
|
self.stop_app()
|
|
elif isinstance(msg, Event):
|
|
LOGGER.info('Received event: {}'.format(msg))
|
|
self.event_processor.process_event(msg)
|
|
|
|
return _f
|
|
|
|
|
|
def stop_app(self):
|
|
""" Stops the backends and the bus """
|
|
for backend in self.backends.values():
|
|
backend.stop()
|
|
self.bus.stop()
|
|
|
|
|
|
def start(self):
|
|
""" Start the daemon """
|
|
self.bus = Bus(on_message=self.on_message())
|
|
|
|
# Initialize the backends and link them to the bus
|
|
self.backends = register_backends(bus=self.bus, global_scope=True)
|
|
|
|
# Start the backend threads
|
|
for backend in self.backends.values():
|
|
backend.start()
|
|
|
|
# Start the cron scheduler
|
|
if Config.get_cronjobs():
|
|
CronScheduler(jobs=Config.get_cronjobs()).start()
|
|
|
|
# Poll for messages on the bus
|
|
try:
|
|
self.bus.poll()
|
|
except KeyboardInterrupt:
|
|
LOGGER.info('SIGINT received, terminating application')
|
|
finally:
|
|
self.stop_app()
|
|
|
|
|
|
def main():
|
|
"""
|
|
Platypush daemon main
|
|
"""
|
|
|
|
print('Starting platypush v.{}'.format(__version__))
|
|
app = Daemon.build_from_cmdline(sys.argv[1:])
|
|
app.start()
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|