add scheduler middleware

app/services/scheduler.py

@@ -0,0 +1,38 @@
+from datetime import datetime
+
+from starlette.types import ASGIApp, Receive, Scope, Send
+
+from apscheduler import AsyncScheduler
+from apscheduler.triggers.interval import IntervalTrigger
+
+from app.utils.logging import AppLogger
+
+logger = AppLogger().get_logger()
+
+
+def tick():
+
+    logger.info(f">>>> Be or not to be...{datetime.now()}")
+
+
+class SchedulerMiddleware:
+    # TODO: need access to request to be able to get db conn pool
+
+    def __init__(
+        self,
+        app: ASGIApp,
+        scheduler: AsyncScheduler,
+    ) -> None:
+        self.app = app
+        self.scheduler = scheduler
+
+    async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
+        if scope["type"] == "lifespan":
+            async with self.scheduler:
+                await self.scheduler.add_schedule(
+                    tick, IntervalTrigger(seconds=25), id="tick"
+                )
+                await self.scheduler.start_in_background()
+                await self.app(scope, receive, send)
+        else:
+            await self.app(scope, receive, send)