implement job runner and scheduler

repub/datastar.py

@@ -19,27 +19,31 @@ RenderFunction = Callable[[], Awaitable[RenderResult]]
 
 class RefreshBroker:
     def __init__(self) -> None:
-        self._subscribers: set[asyncio.Queue[object]] = set()
+        self._subscribers: dict[asyncio.Queue[object], asyncio.AbstractEventLoop] = {}
 
     def subscribe(self) -> asyncio.Queue[object]:
         queue: asyncio.Queue[object] = asyncio.Queue(maxsize=1)
-        self._subscribers.add(queue)
+        self._subscribers[queue] = asyncio.get_running_loop()
         return queue
 
     def unsubscribe(self, queue: asyncio.Queue[object]) -> None:
-        self._subscribers.discard(queue)
+        self._subscribers.pop(queue, None)
 
     def publish(self, event: object = "refresh-event") -> None:
-        for queue in tuple(self._subscribers):
-            if queue.full():
-                try:
-                    queue.get_nowait()
-                except asyncio.QueueEmpty:
-                    pass
-            try:
-                queue.put_nowait(event)
-            except asyncio.QueueFull:
-                continue
+        for queue, loop in tuple(self._subscribers.items()):
+            loop.call_soon_threadsafe(_publish_event, queue, event)
+
+
+def _publish_event(queue: asyncio.Queue[object], event: object) -> None:
+    if queue.full():
+        try:
+            queue.get_nowait()
+        except asyncio.QueueEmpty:
+            pass
+    try:
+        queue.put_nowait(event)
+    except asyncio.QueueFull:
+        return
 
 
 async def render_sse_event(