baseimage-tutorial-framework/lib/tfw/components/process_managing_event_handler.py

42 lines
1.4 KiB
Python

from functools import wraps
from tfw.event_handler_base import TriggerlessEventHandler
from tfw.components.mixins import SupervisorMixin
from tfw.networking.event_handlers.server_connector import ServerUplinkConnector
from tfw.config.logs import logging
log = logging.getLogger(__name__)
class ProcessManager(SupervisorMixin):
def __init__(self):
self.commands = {'start': self.start_process,
'stop': self.stop_process,
'restart': self.restart_process}
def __call__(self, command, process_name):
self.commands[command](process_name)
class ProcessManagingEventHandler(TriggerlessEventHandler):
def __init__(self, key, dirmonitor=None):
super().__init__(key)
self.key = key
self.monitor = dirmonitor
self.processmanager = ProcessManager()
self.uplink = ServerUplinkConnector()
def _with_monitor_paused(fun):
@wraps(fun)
def wrapper(self, *args, **kwargs):
if self.monitor:
with self.monitor.pauser:
return fun(self, *args, **kwargs)
return fun(self, *args, **kwargs)
return wrapper
@_with_monitor_paused
def handle_event(self, key, data_json):
data = data_json['data']
self.processmanager(data['command'], data['process_name'])
self.uplink.send(self.key, {'data': {'process_name': data['process_name']}})