core/homeassistant/components/sensor/api_streams.py

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"""Entity to track connections to stream API."""
import asyncio
import logging
from homeassistant.helpers.entity import Entity
class StreamHandler(logging.Handler):
"""Check log messages for stream connect/disconnect."""
def __init__(self, entity):
"""Initialize handler."""
super().__init__()
self.entity = entity
self.count = 0
def handle(self, record):
"""Handle a log message."""
if not record.msg.startswith('STREAM'):
return
if record.msg.endswith('ATTACHED'):
self.entity.count += 1
elif record.msg.endswith('RESPONSE CLOSED'):
self.entity.count -= 1
self.entity.schedule_update_ha_state()
@asyncio.coroutine
def async_setup_platform(hass, config, async_add_devices, discovery_info=None):
"""Set up the logger for filters."""
entity = APICount()
logging.getLogger('homeassistant.components.api').addHandler(
StreamHandler(entity))
yield from async_add_devices([entity])
class APICount(Entity):
"""Entity to represent how many people are connected to stream API."""
def __init__(self):
"""Initialize the API count."""
self.count = 0
@property
def name(self):
"""Return name of entity."""
return "Connected clients"
@property
def state(self):
"""Return current API count."""
return self.count
@property
def unit_of_measurement(self):
"""Unit of measurement."""
return "clients"