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WIP redo asyncio async gen streaming

infect_asyncio_backup
Tyler Goodlet 2021-04-27 12:20:33 -04:00
parent de3a6b9f09
commit 7cc25fc99f
2 changed files with 139 additions and 34 deletions
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6
tractor/_root.py
View File

@ -234,7 +234,7 @@ def run(
def run_daemon(
rpc_module_paths: List[str],
enable_modules: List[str],
**kwargs
) -> None:
"""Spawn daemon actor which will respond to RPC.
@ -243,9 +243,9 @@ def run_daemon(
``tractor.run(trio.sleep(float('inf')))`` such that the first actor spawned
is meant to run forever responding to RPC requests.
"""
kwargs['rpc_module_paths'] = list(rpc_module_paths)
kwargs['enable_modules'] = list(enable_modules)
for path in rpc_module_paths:
for path in enable_modules:
importlib.import_module(path)
return run(partial(trio.sleep, float('inf')), **kwargs)

163
tractor/to_asyncio.py
View File

@ -43,15 +43,16 @@ async def consume_asyncgen(
to_trio.send_nowait(item)
async def run_task(
def _run_asyncio_task(
func: Callable,
*,
qsize: int = 2**10,
qsize: int = 1,
_treat_as_stream: bool = False,
**kwargs,
) -> Any:
"""Run an ``asyncio`` async function or generator in a task, return
or stream the result back to ``trio``.
"""
assert current_actor().is_infected_aio()
@ -59,29 +60,38 @@ async def run_task(
from_trio = asyncio.Queue(qsize) # type: ignore
to_trio, from_aio = trio.open_memory_channel(qsize) # type: ignore
from_aio._err = None
args = tuple(inspect.getfullargspec(func).args)
if getattr(func, '_tractor_steam_function', None):
# the assumption is that the target async routine accepts the
# send channel then it intends to yield more then one return
# value otherwise it would just return ;P
_treat_as_stream = True
# _treat_as_stream = True
assert qsize > 1
# allow target func to accept/stream results manually by name
if 'to_trio' in args:
kwargs['to_trio'] = to_trio
if 'from_trio' in args:
kwargs['from_trio'] = from_trio
# if 'from_aio' in args:
# kwargs['from_aio'] = from_aio
coro = func(**kwargs)
cancel_scope = trio.CancelScope()
# cancel_scope = trio.CancelScope()
# start the asyncio task we submitted from trio
if inspect.isawaitable(coro):
task = asyncio.create_task(run_coro(to_trio, coro))
elif inspect.isasyncgen(coro):
task = asyncio.create_task(consume_asyncgen(to_trio, coro))
else:
raise TypeError(f"No support for invoking {coro}")
@ -96,54 +106,149 @@ async def run_task(
if aio_err:
log.exception(f"asyncio task errorred:\n{aio_err}")
cancel_scope.cancel()
# cancel_scope.cancel()
from_aio._err = aio_err
to_trio.close()
task.add_done_callback(cancel_trio)
return task, from_aio, to_trio
async def run_task(
func: Callable,
*,
qsize: int = 2**10,
_treat_as_stream: bool = False,
**kwargs,
) -> Any:
"""Run an ``asyncio`` async function or generator in a task, return
or stream the result back to ``trio``.
"""
# assert current_actor().is_infected_aio()
# # ITC (inter task comms)
# from_trio = asyncio.Queue(qsize) # type: ignore
# to_trio, from_aio = trio.open_memory_channel(qsize) # type: ignore
# args = tuple(inspect.getfullargspec(func).args)
# if getattr(func, '_tractor_steam_function', None):
# # the assumption is that the target async routine accepts the
# # send channel then it intends to yield more then one return
# # value otherwise it would just return ;P
# _treat_as_stream = True
# # allow target func to accept/stream results manually by name
# if 'to_trio' in args:
# kwargs['to_trio'] = to_trio
# if 'from_trio' in args:
# kwargs['from_trio'] = from_trio
# coro = func(**kwargs)
# cancel_scope = trio.CancelScope()
# # start the asyncio task we submitted from trio
# if inspect.isawaitable(coro):
# task = asyncio.create_task(run_coro(to_trio, coro))
# elif inspect.isasyncgen(coro):
# task = asyncio.create_task(consume_asyncgen(to_trio, coro))
# else:
# raise TypeError(f"No support for invoking {coro}")
# aio_err = None
# def cancel_trio(task):
# """Cancel the calling ``trio`` task on error.
# """
# nonlocal aio_err
# aio_err = task.exception()
# if aio_err:
# log.exception(f"asyncio task errorred:\n{aio_err}")
# cancel_scope.cancel()
# task.add_done_callback(cancel_trio)
# async iterator
if inspect.isasyncgen(coro) or _treat_as_stream:
# if inspect.isasyncgen(coro) or _treat_as_stream:
async def stream_results():
try:
with cancel_scope:
# stream values upward
async with from_aio:
async for item in from_aio:
yield item
# if inspect.isasyncgenfunction(meth) or :
if _treat_as_stream:
if cancel_scope.cancelled_caught:
# always raise from any captured asyncio error
if aio_err:
raise aio_err
task, from_aio, to_trio = _run_asyncio_task(
func,
qsize=2**8,
**kwargs,
)
except BaseException as err:
if aio_err is not None:
# always raise from any captured asyncio error
raise err from aio_err
else:
raise
return from_aio
return stream_results()
# async def stream_results():
# try:
# with cancel_scope:
# # stream values upward
# async with from_aio:
# async for item in from_aio:
# yield item
# if cancel_scope.cancelled_caught:
# # always raise from any captured asyncio error
# if aio_err:
# raise aio_err
# except BaseException as err:
# if aio_err is not None:
# # always raise from any captured asyncio error
# raise err from aio_err
# else:
# raise
# finally:
# # breakpoint()
# task.cancel()
# return stream_results()
# simple async func
try:
with cancel_scope:
task, from_aio, to_trio = _run_asyncio_task(
func,
qsize=1,
**kwargs,
)
# with cancel_scope:
# async with from_aio:
# return single value
return await from_aio.receive()
if cancel_scope.cancelled_caught:
# always raise from any captured asyncio error
if aio_err:
raise aio_err
# if cancel_scope.cancelled_caught:
# # always raise from any captured asyncio error
# if aio_err:
# raise aio_err
# Do we need this?
except BaseException as err:
# await tractor.breakpoint()
aio_err = from_aio._err
if aio_err is not None:
# always raise from any captured asyncio error
raise err from aio_err
else:
raise
finally:
task.cancel()
# async def stream_from_task
# pass
def run_as_asyncio_guest(
trio_main: Callable,