mirror of https://github.com/home-assistant/core
118 lines
3.3 KiB
Python
118 lines
3.3 KiB
Python
"""Run Home Assistant."""
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import asyncio
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from concurrent.futures import ThreadPoolExecutor
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import dataclasses
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import logging
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import sys
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from typing import Any, Dict, Optional
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from homeassistant import bootstrap
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from homeassistant.core import callback
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from homeassistant.helpers.frame import warn_use
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#
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# Python 3.8 has significantly less workers by default
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# than Python 3.7. In order to be consistent between
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# supported versions, we need to set max_workers.
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#
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# In most cases the workers are not I/O bound, as they
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# are sleeping/blocking waiting for data from integrations
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# updating so this number should be higher than the default
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# use case.
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#
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MAX_EXECUTOR_WORKERS = 64
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@dataclasses.dataclass
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class RuntimeConfig:
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"""Class to hold the information for running Home Assistant."""
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config_dir: str
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skip_pip: bool = False
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safe_mode: bool = False
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verbose: bool = False
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log_rotate_days: Optional[int] = None
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log_file: Optional[str] = None
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log_no_color: bool = False
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debug: bool = False
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open_ui: bool = False
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# In Python 3.8+ proactor policy is the default on Windows
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if sys.platform == "win32" and sys.version_info[:2] < (3, 8):
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PolicyBase = asyncio.WindowsProactorEventLoopPolicy
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else:
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PolicyBase = asyncio.DefaultEventLoopPolicy
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class HassEventLoopPolicy(PolicyBase): # type: ignore
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"""Event loop policy for Home Assistant."""
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def __init__(self, debug: bool) -> None:
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"""Init the event loop policy."""
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super().__init__()
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self.debug = debug
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@property
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def loop_name(self) -> str:
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"""Return name of the loop."""
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return self._loop_factory.__name__ # type: ignore
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def new_event_loop(self) -> asyncio.AbstractEventLoop:
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"""Get the event loop."""
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loop: asyncio.AbstractEventLoop = super().new_event_loop()
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loop.set_exception_handler(_async_loop_exception_handler)
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if self.debug:
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loop.set_debug(True)
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executor = ThreadPoolExecutor(
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thread_name_prefix="SyncWorker", max_workers=MAX_EXECUTOR_WORKERS
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)
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loop.set_default_executor(executor)
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loop.set_default_executor = warn_use( # type: ignore
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loop.set_default_executor, "sets default executor on the event loop"
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)
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# Shut down executor when we shut down loop
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orig_close = loop.close
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def close() -> None:
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executor.shutdown(wait=True)
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orig_close()
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loop.close = close # type: ignore
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return loop
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@callback
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def _async_loop_exception_handler(_: Any, context: Dict) -> None:
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"""Handle all exception inside the core loop."""
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kwargs = {}
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exception = context.get("exception")
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if exception:
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kwargs["exc_info"] = (type(exception), exception, exception.__traceback__)
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logging.getLogger(__package__).error(
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"Error doing job: %s", context["message"], **kwargs # type: ignore
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)
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async def setup_and_run_hass(runtime_config: RuntimeConfig) -> int:
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"""Set up Home Assistant and run."""
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hass = await bootstrap.async_setup_hass(runtime_config)
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if hass is None:
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return 1
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return await hass.async_run()
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def run(runtime_config: RuntimeConfig) -> int:
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"""Run Home Assistant."""
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asyncio.set_event_loop_policy(HassEventLoopPolicy(runtime_config.debug))
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return asyncio.run(setup_and_run_hass(runtime_config))
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