80 lines
2.3 KiB
Python
80 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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proxy.py
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~~~~~~~~
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⚡⚡⚡ Fast, Lightweight, Pluggable, TLS interception capable proxy server focused on
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Network monitoring, controls & Application development, testing, debugging.
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:copyright: (c) 2013-present by Abhinav Singh and contributors.
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:license: BSD, see LICENSE for more details.
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.. spelling::
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eventing
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"""
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import logging
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import threading
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import multiprocessing
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from typing import Any, Optional
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from .queue import EventQueue
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from .dispatcher import EventDispatcher
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from ...common.flag import flags
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from ...common.constants import DEFAULT_ENABLE_EVENTS
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logger = logging.getLogger(__name__)
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flags.add_argument(
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'--enable-events',
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action='store_true',
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default=DEFAULT_ENABLE_EVENTS,
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help='Default: False. Enables core to dispatch lifecycle events. '
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'Plugins can be used to subscribe for core events.',
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)
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class EventManager:
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"""Event manager is a context manager which provides
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encapsulation around various setup and shutdown steps
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to start the eventing core.
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"""
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def __init__(self) -> None:
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self.queue: Optional[EventQueue] = None
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self.dispatcher: Optional[EventDispatcher] = None
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self.dispatcher_thread: Optional[threading.Thread] = None
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self.dispatcher_shutdown: Optional[threading.Event] = None
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def __enter__(self) -> 'EventManager':
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self.setup()
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return self
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def __exit__(self, *args: Any) -> None:
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self.shutdown()
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def setup(self) -> None:
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self.queue = EventQueue(multiprocessing.Queue())
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self.dispatcher_shutdown = threading.Event()
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assert self.dispatcher_shutdown
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assert self.queue
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self.dispatcher = EventDispatcher(
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shutdown=self.dispatcher_shutdown,
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event_queue=self.queue,
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)
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self.dispatcher_thread = threading.Thread(
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target=self.dispatcher.run,
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)
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self.dispatcher_thread.start()
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logger.debug('Dispatcher#%d started', self.dispatcher_thread.ident)
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def shutdown(self) -> None:
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assert self.dispatcher_shutdown and self.dispatcher_thread
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self.dispatcher_shutdown.set()
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self.dispatcher_thread.join()
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logger.debug(
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'Dispatcher#%d shutdown',
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self.dispatcher_thread.ident,
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)
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