irm-kmi-ha/custom_components/irm_kmi/coordinator.py

51 lines
1.8 KiB
Python

"""Example integration using DataUpdateCoordinator."""
from datetime import timedelta
import logging
import async_timeout
from homeassistant.helpers.aiohttp_client import async_get_clientsession
from homeassistant.helpers.update_coordinator import (
DataUpdateCoordinator,
UpdateFailed,
)
from .api import IrmKmiApiClient, IrmKmiApiError
_LOGGER = logging.getLogger(__name__)
class IrmKmiCoordinator(DataUpdateCoordinator):
"""Coordinator to update data from IRM KMI"""
def __init__(self, hass, coord: dict):
"""Initialize my coordinator."""
super().__init__(
hass,
_LOGGER,
# Name of the data. For logging purposes.
name="IRM KMI weather",
# Polling interval. Will only be polled if there are subscribers.
update_interval=timedelta(minutes=15),
)
self._api_client = IrmKmiApiClient(session=async_get_clientsession(hass))
self._coord = coord
async def _async_update_data(self):
"""Fetch data from API endpoint.
This is the place to pre-process the data to lookup tables
so entities can quickly look up their data.
"""
try:
# Note: asyncio.TimeoutError and aiohttp.ClientError are already
# handled by the data update coordinator.
async with async_timeout.timeout(10):
# Grab active context variables to limit data required to be fetched from API
# Note: using context is not required if there is no need or ability to limit
# data retrieved from API.
data = await self._api_client.get_forecasts_coord(self._coord)
return data
except IrmKmiApiError as err:
raise UpdateFailed(f"Error communicating with API: {err}")