Method startup

gunicorn/asgi/lifespan.py:53–88

Run lifespan startup and wait for completion. Raises: RuntimeError: If startup fails or app doesn't support lifespan

(self)

        self._app_finished = False

    async def startup(self):
        """Run lifespan startup and wait for completion.

        Raises:
            RuntimeError: If startup fails or app doesn't support lifespan
        """
        scope = {
            "type": "lifespan",
            "asgi": {"version": "3.0", "spec_version": "2.4"},
            "state": self.state,
        }

        # Send startup event
        await self._receive_queue.put({"type": "lifespan.startup"})

        # Run lifespan in background task
        self._task = asyncio.create_task(self._run_lifespan(scope))

        # Wait for startup with timeout
        try:
            await asyncio.wait_for(
                self._startup_complete.wait(),
                timeout=30.0  # Reasonable startup timeout
            )
        except asyncio.TimeoutError:
            if self._task:
                self._task.cancel()
            raise RuntimeError("Lifespan startup timed out")

        if self._startup_failed:
            if self._task:
                self._task.cancel()
            msg = self._startup_error or "Unknown error"
            raise RuntimeError(f"Lifespan startup failed: {msg}")

        self.logger.debug("ASGI lifespan startup complete")

    async def shutdown(self):
        """Signal shutdown and wait for completion.