mirror of
https://github.com/avatao-content/baseimage-tutorial-framework
synced 2024-11-23 02:21:32 +00:00
56 lines
2.0 KiB
Python
56 lines
2.0 KiB
Python
# Copyright (C) 2018 Avatao.com Innovative Learning Kft.
|
|
# All Rights Reserved. See LICENSE file for details.
|
|
|
|
from xmlrpc.client import Fault as SupervisorFault
|
|
|
|
from tfw import EventHandlerBase
|
|
from tfw.mixins import SupervisorMixin
|
|
from tfw.config.logs import logging
|
|
from .directory_monitor import with_monitor_paused
|
|
|
|
LOG = logging.getLogger(__name__)
|
|
|
|
|
|
class ProcessManager(SupervisorMixin):
|
|
def __init__(self):
|
|
self.commands = {'start': self.start_process,
|
|
'stop': self.stop_process,
|
|
'restart': self.restart_process,
|
|
'readlog': self.read_log}
|
|
|
|
def __call__(self, command, process_name):
|
|
return self.commands[command](process_name)
|
|
|
|
|
|
class ProcessManagingEventHandler(EventHandlerBase):
|
|
"""
|
|
Event handler that can manage processes managed by supervisor.
|
|
|
|
This EventHandler accepts messages that have a data["command"] key specifying
|
|
a command to be executed.
|
|
Every message must contain a data["process_name"] field with the name of the
|
|
process to manage. This is the name specified in supervisor config files like so:
|
|
[program:someprogram]
|
|
|
|
Commands available: start, stop, restart, readlog
|
|
(the names are as self-documenting as it gets)
|
|
"""
|
|
def __init__(self, key, dirmonitor=None):
|
|
super().__init__(key)
|
|
self.key = key
|
|
self.monitor = dirmonitor
|
|
self.processmanager = ProcessManager()
|
|
|
|
@with_monitor_paused
|
|
def handle_event(self, message):
|
|
try:
|
|
data = message['data']
|
|
self.processmanager(data['command'], data['process_name'])
|
|
return message
|
|
except KeyError:
|
|
LOG.error('IGNORING MESSAGE: Invalid message received: %s', message)
|
|
except SupervisorFault as fault:
|
|
message['data']['error'] = fault.faultString
|
|
message['data']['log'] = self.processmanager.read_log(message['data']['process_name'])
|
|
return message
|