eventloop: improve callback handling

Wrap all callbacks in a coroutine that handles exceptions.  This
should eliminate "task not retreived" errors.

Signed-off-by:  Eric Callahan <arksine.code@gmail.com>

moonraker/eventloop.py

@@ -15,7 +15,6 @@ from typing import (
     TYPE_CHECKING,
     Awaitable,
     Callable,
-    Coroutine,
     Optional,
     Tuple,
     TypeVar,
@@ -67,11 +66,16 @@ class EventLoop:
                           *args,
                           **kwargs
                           ) -> None:
-        if inspect.iscoroutinefunction(callback):
-            self.aioloop.create_task(callback(*args, **kwargs))  # type: ignore
-        else:
-            self.aioloop.call_soon(
-                functools.partial(callback, *args, **kwargs))
+        async def _wrapper():
+            try:
+                ret = callback(*args, **kwargs)
+                if inspect.isawaitable(ret):
+                    await ret
+            except asyncio.CancelledError:
+                raise
+            except Exception:
+                logging.exception("Error Running Callback")
+        self.aioloop.create_task(_wrapper())
 
     def delay_callback(self,
                        delay: float,
@@ -79,23 +83,14 @@ class EventLoop:
                        *args,
                        **kwargs
                        ) -> asyncio.TimerHandle:
-        if inspect.iscoroutinefunction(callback):
-            return self.aioloop.call_later(
-                delay, self._async_callback,
-                functools.partial(callback, *args, **kwargs))
-        else:
-            return self.aioloop.call_later(
-                delay, functools.partial(callback, *args, **kwargs))
+        return self.aioloop.call_later(
+            delay, self.register_callback,
+            functools.partial(callback, *args, **kwargs)
+        )
 
     def register_timer(self, callback: TimerCallback):
         return FlexTimer(self, callback)
 
-    def _async_callback(self, callback: Callable[[], Coroutine]) -> None:
-        # This wrapper delays creation of the coroutine object.  In the
-        # event that a callback is cancelled this prevents "coroutine
-        # was never awaited" warnings in asyncio
-        self.aioloop.create_task(callback())
-
     def run_in_thread(self,
                       callback: Callable[..., _T],
                       *args