wehub-resource-sync
43 lines
1.2 KiB
Python
43 lines
1.2 KiB
Python
# flake8: noqa
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# __streaming_example_start__
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# File name: stream.py
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from typing import AsyncGenerator, Generator
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from ray import serve
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from ray.serve.handle import DeploymentHandle, DeploymentResponseGenerator
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@serve.deployment
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class Streamer:
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def __call__(self, limit: int) -> Generator[int, None, None]:
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for i in range(limit):
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yield i
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@serve.deployment
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class Caller:
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def __init__(self, streamer: DeploymentHandle):
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self._streamer = streamer.options(
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# Must set `stream=True` on the handle, then the output will be a
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# response generator.
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stream=True,
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)
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async def __call__(self, limit: int) -> AsyncGenerator[int, None]:
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# Response generator can be used in an `async for` block.
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r: DeploymentResponseGenerator = self._streamer.remote(limit)
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async for i in r:
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yield i
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app = Caller.bind(Streamer.bind())
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handle: DeploymentHandle = serve.run(app).options(
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stream=True,
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)
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# Response generator can also be used as a regular generator in a sync context.
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r: DeploymentResponseGenerator = handle.remote(10)
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assert list(r) == list(range(10))
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# __streaming_example_end__
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