tractor/examples/debugging/multi_subactors.py

52 lines
1.5 KiB
Python

import tractor
import trio
async def breakpoint_forever():
"Indefinitely re-enter debugger in child actor."
while True:
await trio.sleep(0.1)
await tractor.breakpoint()
async def name_error():
"Raise a ``NameError``"
getattr(doggypants)
async def spawn_error():
""""A nested nursery that triggers another ``NameError``.
"""
async with tractor.open_nursery() as n:
portal = await n.run_in_actor('name_error_1', name_error)
return await portal.result()
async def main():
"""The main ``tractor`` routine.
The process tree should look as approximately as follows:
-python examples/debugging/multi_subactors.py
|-python -m tractor._child --uid ('name_error', 'a7caf490 ...)
|-python -m tractor._child --uid ('bp_forever', '1f787a7e ...)
`-python -m tractor._child --uid ('spawn_error', '52ee14a5 ...)
`-python -m tractor._child --uid ('name_error', '3391222c ...)
"""
async with tractor.open_nursery() as n:
# spawn both actors
portal1 = await n.run_in_actor('bp_forever', breakpoint_forever)
portal = await n.run_in_actor('name_error', name_error)
portal2 = await n.run_in_actor('spawn_error', spawn_error)
# attempt to collect results (which raises error in parent)
# still has some issues where the parent seems to get stuck
# await portal.result()
# await portal1.result()
# await portal2.result()
if __name__ == '__main__':
tractor.run(main, debug_mode=True)