forked from platypush/platypush
299 lines
9.2 KiB
Python
299 lines
9.2 KiB
Python
"""
|
|
Platypush
|
|
|
|
.. moduleauthor:: Fabio Manganiello <blacklight86@gmail.com>
|
|
.. license: MIT
|
|
"""
|
|
|
|
import argparse
|
|
import logging
|
|
import os
|
|
import sys
|
|
from typing import Optional
|
|
|
|
from .bus.redis import RedisBus
|
|
from .config import Config
|
|
from .context import register_backends, register_plugins
|
|
from .cron.scheduler import CronScheduler
|
|
from .entities import init_entities_engine, EntitiesEngine
|
|
from .event.processor import EventProcessor
|
|
from .logger import Logger
|
|
from .message.event import Event
|
|
from .message.event.application import ApplicationStartedEvent
|
|
from .message.request import Request
|
|
from .message.response import Response
|
|
from .utils import set_thread_name, get_enabled_plugins
|
|
|
|
__author__ = 'Fabio Manganiello <info@fabiomanganiello.com>'
|
|
__version__ = '0.24.2'
|
|
|
|
log = logging.getLogger('platypush')
|
|
|
|
|
|
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
|
|
|
|
# Default bus queue name
|
|
_default_redis_queue = 'platypush/bus'
|
|
|
|
pidfile = 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,
|
|
pidfile=None,
|
|
requests_to_process=None,
|
|
no_capture_stdout=False,
|
|
no_capture_stderr=False,
|
|
redis_queue=None,
|
|
verbose=False,
|
|
):
|
|
"""
|
|
Constructor
|
|
Params:
|
|
config_file -- Configuration file override (default: None)
|
|
pidfile -- File where platypush will store its PID upon launch,
|
|
useful if you're planning to integrate the application
|
|
within a service or a launcher script (default: None)
|
|
requests_to_process -- Exit after processing the specified number
|
|
of requests (default: None, loop forever)
|
|
no_capture_stdout -- Set to true if you want to disable the stdout
|
|
capture by the logging system
|
|
no_capture_stderr -- Set to true if you want to disable the stderr
|
|
capture by the logging system
|
|
redis_queue -- Name of the (Redis) queue used for dispatching messages (default: platypush/bus).
|
|
verbose -- Enable debug/verbose logging, overriding the stored configuration (default: False).
|
|
"""
|
|
|
|
if pidfile:
|
|
self.pidfile = pidfile
|
|
with open(self.pidfile, 'w') as f:
|
|
f.write(str(os.getpid()))
|
|
|
|
self.redis_queue = redis_queue or self._default_redis_queue
|
|
self.config_file = config_file
|
|
Config.init(self.config_file)
|
|
logging_conf = Config.get('logging') or {}
|
|
if verbose:
|
|
logging_conf['level'] = logging.DEBUG
|
|
logging.basicConfig(**logging_conf)
|
|
|
|
redis_conf = Config.get('backend.redis') or {}
|
|
self.bus = RedisBus(
|
|
redis_queue=self.redis_queue,
|
|
on_message=self.on_message(),
|
|
**redis_conf.get('redis_args', {})
|
|
)
|
|
|
|
self.no_capture_stdout = no_capture_stdout
|
|
self.no_capture_stderr = no_capture_stderr
|
|
self.event_processor = EventProcessor()
|
|
self.entities_engine: Optional[EntitiesEngine] = None
|
|
self.requests_to_process = requests_to_process
|
|
self.processed_requests = 0
|
|
self.cron_scheduler = None
|
|
|
|
@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__,
|
|
)
|
|
parser.add_argument(
|
|
'--version',
|
|
dest='version',
|
|
required=False,
|
|
action='store_true',
|
|
help="Print the current version and exit",
|
|
)
|
|
parser.add_argument(
|
|
'--verbose',
|
|
'-v',
|
|
dest='verbose',
|
|
required=False,
|
|
action='store_true',
|
|
help="Enable verbose/debug logging",
|
|
)
|
|
parser.add_argument(
|
|
'--pidfile',
|
|
'-P',
|
|
dest='pidfile',
|
|
required=False,
|
|
default=None,
|
|
help="File where platypush will "
|
|
+ "store its PID, useful if you're planning to "
|
|
+ "integrate it in a service",
|
|
)
|
|
parser.add_argument(
|
|
'--no-capture-stdout',
|
|
dest='no_capture_stdout',
|
|
required=False,
|
|
action='store_true',
|
|
help="Set this flag if you have max stack depth "
|
|
+ "exceeded errors so stdout won't be captured by "
|
|
+ "the logging system",
|
|
)
|
|
parser.add_argument(
|
|
'--no-capture-stderr',
|
|
dest='no_capture_stderr',
|
|
required=False,
|
|
action='store_true',
|
|
help="Set this flag if you have max stack depth "
|
|
+ "exceeded errors so stderr won't be captured by "
|
|
+ "the logging system",
|
|
)
|
|
parser.add_argument(
|
|
'--redis-queue',
|
|
dest='redis_queue',
|
|
required=False,
|
|
default=cls._default_redis_queue,
|
|
help="Name of the Redis queue to be used to internally deliver messages "
|
|
"(default: platypush/bus)",
|
|
)
|
|
|
|
opts, args = parser.parse_known_args(args)
|
|
|
|
if opts.version:
|
|
print(__version__)
|
|
sys.exit(0)
|
|
|
|
return cls(
|
|
config_file=opts.config,
|
|
pidfile=opts.pidfile,
|
|
no_capture_stdout=opts.no_capture_stdout,
|
|
no_capture_stderr=opts.no_capture_stderr,
|
|
redis_queue=opts.redis_queue,
|
|
verbose=opts.verbose,
|
|
)
|
|
|
|
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:
|
|
log.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):
|
|
log.info('Received response: {}'.format(msg))
|
|
elif isinstance(msg, Event):
|
|
if not msg.disable_logging:
|
|
log.info('Received event: {}'.format(msg))
|
|
self.event_processor.process_event(msg)
|
|
|
|
return _f
|
|
|
|
def stop_app(self):
|
|
"""Stops the backends and the bus"""
|
|
from .plugins import RunnablePlugin
|
|
|
|
if self.backends:
|
|
for backend in self.backends.values():
|
|
backend.stop()
|
|
|
|
for plugin in get_enabled_plugins().values():
|
|
if isinstance(plugin, RunnablePlugin):
|
|
plugin.stop()
|
|
|
|
if self.bus:
|
|
self.bus.stop()
|
|
self.bus = None
|
|
|
|
if self.cron_scheduler:
|
|
self.cron_scheduler.stop()
|
|
self.cron_scheduler = None
|
|
|
|
if self.entities_engine:
|
|
self.entities_engine.stop()
|
|
self.entities_engine = None
|
|
|
|
def run(self):
|
|
"""Start the daemon"""
|
|
if not self.no_capture_stdout:
|
|
sys.stdout = Logger(log.info)
|
|
if not self.no_capture_stderr:
|
|
sys.stderr = Logger(log.warning)
|
|
|
|
set_thread_name('platypush')
|
|
log.info('---- Starting platypush v.{}'.format(__version__))
|
|
|
|
# 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()
|
|
|
|
# Initialize the plugins
|
|
register_plugins(bus=self.bus)
|
|
|
|
# Initialize the entities engine
|
|
self.entities_engine = init_entities_engine()
|
|
|
|
# Start the cron scheduler
|
|
if Config.get_cronjobs():
|
|
self.cron_scheduler = CronScheduler(jobs=Config.get_cronjobs())
|
|
self.cron_scheduler.start()
|
|
|
|
assert self.bus, 'The bus is not running'
|
|
self.bus.post(ApplicationStartedEvent())
|
|
|
|
# Poll for messages on the bus
|
|
try:
|
|
self.bus.poll()
|
|
except KeyboardInterrupt:
|
|
log.info('SIGINT received, terminating application')
|
|
finally:
|
|
self.stop_app()
|
|
|
|
|
|
def main():
|
|
"""
|
|
Platypush daemon main
|
|
"""
|
|
app = Daemon.build_from_cmdline(sys.argv[1:])
|
|
app.run()
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|