Rescan static wemo (#49934)

Co-authored-by: Martin Hjelmare <marhje52@gmail.com>
Co-authored-by: Franck Nijhof <git@frenck.dev>

homeassistant/components/wemo/__init__.py

@@ -1,5 +1,6 @@
 """Support for WeMo device discovery."""
-import asyncio
+from __future__ import annotations
+
 import logging
 
 import pywemo
@@ -16,9 +17,14 @@ from homeassistant.core import HomeAssistant, callback
 from homeassistant.helpers import config_validation as cv
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.helpers.event import async_call_later
+from homeassistant.util.async_ import gather_with_concurrency
 
 from .const import DOMAIN
 
+# Max number of devices to initialize at once. This limit is in place to
+# avoid tying up too many executor threads with WeMo device setup.
+MAX_CONCURRENCY = 3
+
 # Mapping from Wemo model_name to domain.
 WEMO_MODEL_DISPATCH = {
     "Bridge": LIGHT_DOMAIN,
@@ -99,9 +105,9 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
     # Keep track of WeMo device subscriptions for push updates
     registry = hass.data[DOMAIN]["registry"] = pywemo.SubscriptionRegistry()
     await hass.async_add_executor_job(registry.start)
-
+    static_conf = config.get(CONF_STATIC, [])
     wemo_dispatcher = WemoDispatcher(entry)
-    wemo_discovery = WemoDiscovery(hass, wemo_dispatcher)
+    wemo_discovery = WemoDiscovery(hass, wemo_dispatcher, static_conf)
 
     async def async_stop_wemo(event):
         """Shutdown Wemo subscriptions and subscription thread on exit."""
@@ -113,17 +119,8 @@ async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry):
         hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STOP, async_stop_wemo)
     )
 
-    static_conf = config.get(CONF_STATIC, [])
-    if static_conf:
-        _LOGGER.debug("Adding statically configured WeMo devices")
-        for device in await asyncio.gather(
-            *[
-                hass.async_add_executor_job(validate_static_config, host, port)
-                for host, port in static_conf
-            ]
-        ):
-            if device:
-                wemo_dispatcher.async_add_unique_device(hass, device)
+    # Need to do this at least once in case statics are defined and discovery is disabled
+    await wemo_discovery.discover_statics()
 
     if config.get(CONF_DISCOVERY, DEFAULT_DISCOVERY):
         await wemo_discovery.async_discover_and_schedule()
@@ -183,12 +180,18 @@ class WemoDiscovery:
     ADDITIONAL_SECONDS_BETWEEN_SCANS = 10
     MAX_SECONDS_BETWEEN_SCANS = 300
 
-    def __init__(self, hass: HomeAssistant, wemo_dispatcher: WemoDispatcher) -> None:
+    def __init__(
+        self,
+        hass: HomeAssistant,
+        wemo_dispatcher: WemoDispatcher,
+        static_config: list[tuple[[str, str | None]]],
+    ) -> None:
         """Initialize the WemoDiscovery."""
         self._hass = hass
         self._wemo_dispatcher = wemo_dispatcher
         self._stop = None
         self._scan_delay = 0
+        self._static_config = static_config
 
     async def async_discover_and_schedule(self, *_) -> None:
         """Periodically scan the network looking for WeMo devices."""
@@ -198,6 +201,8 @@ class WemoDiscovery:
                 pywemo.discover_devices
             ):
                 self._wemo_dispatcher.async_add_unique_device(self._hass, device)
+            await self.discover_statics()
+
         finally:
             # Run discovery more frequently after hass has just started.
             self._scan_delay = min(
@@ -217,6 +222,22 @@ class WemoDiscovery:
             self._stop()
             self._stop = None
 
+    async def discover_statics(self):
+        """Initialize or Re-Initialize connections to statically configured devices."""
+        if self._static_config:
+            _LOGGER.debug("Adding statically configured WeMo devices")
+            for device in await gather_with_concurrency(
+                MAX_CONCURRENCY,
+                *[
+                    self._hass.async_add_executor_job(
+                        validate_static_config, host, port
+                    )
+                    for host, port in self._static_config
+                ],
+            ):
+                if device:
+                    self._wemo_dispatcher.async_add_unique_device(self._hass, device)
+
 
 def validate_static_config(host, port):
     """Handle a static config."""

tests/components/wemo/test_init.py

@@ -117,20 +117,26 @@ async def test_discovery(hass, pywemo_registry):
     with patch(
         "pywemo.discover_devices", return_value=pywemo_devices
     ) as mock_discovery:
-        assert await async_setup_component(
-            hass, DOMAIN, {DOMAIN: {CONF_DISCOVERY: True}}
-        )
-        await pywemo_registry.semaphore.acquire()  # Returns after platform setup.
-        mock_discovery.assert_called()
-        pywemo_devices.append(create_device(2))
+        with patch(
+            "homeassistant.components.wemo.WemoDiscovery.discover_statics"
+        ) as mock_discover_statics:
+            assert await async_setup_component(
+                hass, DOMAIN, {DOMAIN: {CONF_DISCOVERY: True}}
+            )
+            await pywemo_registry.semaphore.acquire()  # Returns after platform setup.
+            mock_discovery.assert_called()
+            mock_discover_statics.assert_called()
+            pywemo_devices.append(create_device(2))
 
-        # Test that discovery runs periodically and the async_dispatcher_send code works.
-        async_fire_time_changed(
-            hass,
-            dt.utcnow()
-            + timedelta(seconds=WemoDiscovery.ADDITIONAL_SECONDS_BETWEEN_SCANS + 1),
-        )
-        await hass.async_block_till_done()
+            # Test that discovery runs periodically and the async_dispatcher_send code works.
+            async_fire_time_changed(
+                hass,
+                dt.utcnow()
+                + timedelta(seconds=WemoDiscovery.ADDITIONAL_SECONDS_BETWEEN_SCANS + 1),
+            )
+            await hass.async_block_till_done()
+            # Test that discover_statics runs during discovery
+            assert mock_discover_statics.call_count == 3
 
     # Verify that the expected number of devices were setup.
     entity_reg = er.async_get(hass)