76 lines
2.1 KiB
Python
76 lines
2.1 KiB
Python
import tractor
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import trio
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async def breakpoint_forever():
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"Indefinitely re-enter debugger in child actor."
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while True:
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await trio.sleep(0.1)
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await tractor.pause()
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async def name_error():
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"Raise a ``NameError``"
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getattr(doggypants) # noqa
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async def spawn_error():
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""""A nested nursery that triggers another ``NameError``.
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"""
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async with tractor.open_nursery() as an:
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return await tractor.to_actor.run(
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name_error,
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an=an,
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name='name_error_1',
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)
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async def main():
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"""The main ``tractor`` routine.
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The process tree should look as approximately as follows:
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-python examples/debugging/multi_subactors.py
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|-python -m tractor._child --uid ('name_error', 'a7caf490 ...)
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|-python -m tractor._child --uid ('bp_forever', '1f787a7e ...)
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`-python -m tractor._child --uid ('spawn_error', '52ee14a5 ...)
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`-python -m tractor._child --uid ('name_error', '3391222c ...)
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"""
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errors: list[BaseException] = []
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async with tractor.open_nursery(
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debug_mode=True,
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# loglevel='runtime',
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) as an:
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async def run_and_collect(fn):
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'''
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One-shot whose (boxed) error is stashed instead of
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raised so a sibling's crash never cancels the others
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before they've had their own debugger sessions (the
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"collect all errors" the legacy `run_in_actor()` API
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did implicitly at nursery teardown).
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'''
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try:
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await tractor.to_actor.run(fn, an=an)
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except tractor.RemoteActorError as rae:
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errors.append(rae)
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# Spawn all one-shot task actors, collecting (vs.
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# raising) their errors.
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async with trio.open_nursery() as tn:
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tn.start_soon(run_and_collect, breakpoint_forever)
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tn.start_soon(run_and_collect, name_error)
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tn.start_soon(run_and_collect, spawn_error)
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if errors:
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raise BaseExceptionGroup(
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'multi_subactors errored!',
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errors,
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)
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if __name__ == '__main__':
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trio.run(main)
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