Update brother to use CoordinatorEntity (#39418)

homeassistant/components/brother/sensor.py

@@ -3,7 +3,7 @@ from datetime import timedelta
 import logging
 
 from homeassistant.const import DEVICE_CLASS_TIMESTAMP
-from homeassistant.helpers.entity import Entity
+from homeassistant.helpers.update_coordinator import CoordinatorEntity
 from homeassistant.util.dt import utcnow
 
 from .const import (
@@ -60,15 +60,15 @@ async def async_setup_entry(hass, config_entry, async_add_entities):
     async_add_entities(sensors, False)
 
 
-class BrotherPrinterSensor(Entity):
+class BrotherPrinterSensor(CoordinatorEntity):
     """Define an Brother Printer sensor."""
 
     def __init__(self, coordinator, kind, device_info):
         """Initialize."""
+        super().__init__(coordinator)
         self._name = f"{coordinator.data[ATTR_MODEL]} {SENSOR_TYPES[kind][ATTR_LABEL]}"
         self._unique_id = f"{coordinator.data[ATTR_SERIAL].lower()}_{kind}"
         self._device_info = device_info
-        self.coordinator = coordinator
         self.kind = kind
         self._attrs = {}
 
@@ -134,16 +134,6 @@ class BrotherPrinterSensor(Entity):
         """Return the unit the value is expressed in."""
         return SENSOR_TYPES[self.kind][ATTR_UNIT]
 
-    @property
-    def available(self):
-        """Return True if entity is available."""
-        return self.coordinator.last_update_success
-
-    @property
-    def should_poll(self):
-        """Return the polling requirement of the entity."""
-        return False
-
     @property
     def device_info(self):
         """Return the device info."""
@@ -153,13 +143,3 @@ class BrotherPrinterSensor(Entity):
     def entity_registry_enabled_default(self):
         """Return if the entity should be enabled when first added to the entity registry."""
         return True
-
-    async def async_added_to_hass(self):
-        """Connect to dispatcher listening for entity data notifications."""
-        self.async_on_remove(
-            self.coordinator.async_add_listener(self.async_write_ha_state)
-        )
-
-    async def async_update(self):
-        """Update Brother entity."""
-        await self.coordinator.async_request_refresh()