81 lines
2.5 KiB
Python
81 lines
2.5 KiB
Python
# SPDX-FileCopyrightText: Copyright (c) 2025 NVIDIA CORPORATION & AFFILIATES. All rights reserved.
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# SPDX-License-Identifier: Apache-2.0
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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import asyncio
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import signal
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import uvloop
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from dynamo.runtime import DistributedRuntime, dynamo_worker
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class RequestHandler:
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"""
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Request handler for the generate endpoint
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"""
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async def generate(self, request):
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print(f"Received request: {request}")
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for char in request:
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await asyncio.sleep(1)
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yield char
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@dynamo_worker(static=False)
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async def worker(runtime: DistributedRuntime):
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print(
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f"Primary lease ID: {runtime.etcd_client().primary_lease_id()}/{runtime.etcd_client().primary_lease_id():#x}"
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)
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# Set up signal handler for graceful shutdown
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loop = asyncio.get_running_loop()
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def signal_handler():
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# Schedule the shutdown coroutine instead of calling it directly
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asyncio.create_task(graceful_shutdown(runtime))
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for sig in (signal.SIGTERM, signal.SIGINT):
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loop.add_signal_handler(sig, signal_handler)
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print("Signal handlers registered for graceful shutdown")
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await init(runtime, "dynamo")
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async def graceful_shutdown(runtime: DistributedRuntime):
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print("Received shutdown signal, shutting down DistributedRuntime")
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runtime.shutdown()
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print("DistributedRuntime shutdown complete")
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async def init(runtime: DistributedRuntime, ns: str):
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"""
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Instantiate a `backend` component and serve the `generate` endpoint
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A `Component` can serve multiple endpoints
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"""
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component = runtime.namespace(ns).component("backend")
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await component.create_service()
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endpoint = component.endpoint("generate")
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print("Started server instance")
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# the server will gracefully shutdown (i.e., keep opened TCP streams finishes)
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# after the lease is revoked
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await endpoint.serve_endpoint(RequestHandler().generate)
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if __name__ == "__main__":
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uvloop.install()
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asyncio.run(worker())
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