websockets: replace references to ioloop with event loop

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

moonraker/websockets.py

@@ -8,10 +8,8 @@ from __future__ import annotations
 import logging
 import ipaddress
 import json
-import tornado.util
-from tornado.ioloop import IOLoop
+import asyncio
 from tornado.websocket import WebSocketHandler, WebSocketClosedError
-from tornado.locks import Event
 from utils import ServerError, SentinelClass
 
 # Annotation imports
@@ -29,6 +27,7 @@ from typing import (
 )
 if TYPE_CHECKING:
     from moonraker import Server
+    from eventloop import EventLoop
     from app import APIDefinition, MoonrakerApp
     import components.authorization
     _T = TypeVar("_T")
@@ -274,7 +273,7 @@ class WebsocketManager(APITransport):
         self.server = server
         self.websockets: Dict[int, WebSocket] = {}
         self.rpc = JsonRPC()
-        self.closed_event: Optional[Event] = None
+        self.closed_event: Optional[asyncio.Event] = None
 
         self.rpc.register_method("server.websocket.id", self._handle_id_request)
 
@@ -368,12 +367,12 @@ class WebsocketManager(APITransport):
     async def close(self) -> None:
         if not self.websockets:
             return
-        self.closed_event = Event()
+        self.closed_event = asyncio.Event()
         for ws in list(self.websockets.values()):
             ws.close()
         try:
-            await self.closed_event.wait(IOLoop.current().time() + 2.)
-        except tornado.util.TimeoutError:
+            await asyncio.wait_for(self.closed_event.wait(), 2.)
+        except asyncio.TimeoutError:
             pass
         self.closed_event = None
 
@@ -381,6 +380,7 @@ class WebSocket(WebSocketHandler, Subscribable):
     def initialize(self) -> None:
         app: MoonrakerApp = self.settings['parent']
         self.server = app.get_server()
+        self.event_loop = self.server.get_event_loop()
         self.wsm = app.get_websocket_manager()
         self.rpc = self.wsm.rpc
         self.uid = id(self)
@@ -394,8 +394,7 @@ class WebSocket(WebSocketHandler, Subscribable):
         self.wsm.add_websocket(self)
 
     def on_message(self, message: Union[bytes, str]) -> None:
-        io_loop = IOLoop.current()
-        io_loop.spawn_callback(self._process_message, message)
+        self.event_loop.register_callback(self._process_message, message)
 
     async def _process_message(self, message: str) -> None:
         try:
@@ -410,7 +409,7 @@ class WebSocket(WebSocketHandler, Subscribable):
         if self.queue_busy:
             return
         self.queue_busy = True
-        IOLoop.current().spawn_callback(self._process_messages)
+        self.event_loop.register_callback(self._process_messages)
 
     async def _process_messages(self):
         if self.is_closed: