97 lines
2.2 KiB
Python
97 lines
2.2 KiB
Python
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import trio
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from tractor import (
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open_nursery,
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context,
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Context,
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MsgStream,
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)
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async def break_channel_silently(
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stream: MsgStream,
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):
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async for msg in stream:
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await stream.send(msg)
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# XXX: close the channel right after an error is raised
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# purposely breaking the IPC transport to make sure the parent
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# doesn't get stuck in debug. this more or less simulates an
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# infinite msg-receive hang on the other end. await
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await stream._ctx.chan.send(None)
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assert 0
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async def error_and_break_stream(
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stream: MsgStream,
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):
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async for msg in stream:
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# echo back msg
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await stream.send(msg)
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try:
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assert 0
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except Exception:
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await stream._ctx.chan.send(None)
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# NOTE: doing this instead causes the error to propagate
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# correctly.
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# await stream.aclose()
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raise
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@context
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async def just_sleep(
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ctx: Context,
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**kwargs,
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) -> None:
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'''
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Start and sleep.
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'''
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d = {}
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await ctx.started()
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try:
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async with (
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ctx.open_stream() as stream,
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trio.open_nursery() as n,
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):
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for i in range(100):
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await stream.send(i)
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if i > 50:
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n.start_soon(break_channel_silently, stream)
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n.start_soon(error_and_break_stream, stream)
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finally:
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d['10'] = 10
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async def main() -> None:
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async with open_nursery(
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# loglevel='info',
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debug_mode=True,
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) as n:
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portal = await n.start_actor(
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'ctx_child',
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# XXX: we don't enable the current module in order
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# to trigger `ModuleNotFound`.
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enable_modules=[__name__],
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# add a debugger test to verify this works B)
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# debug_mode=True,
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)
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async with portal.open_context(
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just_sleep, # taken from pytest parameterization
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) as (ctx, sent):
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async with ctx.open_stream() as stream:
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await stream.send(10)
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async for msg in stream:
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print(msg)
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if __name__ == '__main__':
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trio.run(main)
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