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24 lines
599 B
Python
24 lines
599 B
Python
import asyncio
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class MessageStream:
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"""
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A message stream for consumers to subscribe to,
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and for producers to publish to.
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"""
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def __init__(self):
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self._loop = asyncio.get_running_loop()
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self._waiter = self._loop.create_future()
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def publish(self, message):
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waiter, self._waiter = self._waiter, self._loop.create_future()
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waiter.set_result((message, self._waiter))
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async def subscribe(self):
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waiter = self._waiter
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while True:
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message, waiter = await waiter
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yield message
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__aiter__ = subscribe
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