forked from goodboy/tractor
Compare commits
No commits in common. "asyncio_debugger_support" and "master" have entirely different histories.
asyncio_de
...
master
|
|
@ -3,8 +3,8 @@
|
|||
|gh_actions|
|
||||
|docs|
|
||||
|
||||
``tractor`` is a `structured concurrent`_, (optionally
|
||||
distributed_) multi-processing_ runtime built on trio_.
|
||||
``tractor`` is a `structured concurrent`_, multi-processing_ runtime
|
||||
built on trio_.
|
||||
|
||||
Fundamentally, ``tractor`` gives you parallelism via
|
||||
``trio``-"*actors*": independent Python processes (aka
|
||||
|
|
@ -17,20 +17,11 @@ protocol" constructed on top of multiple Pythons each running a ``trio``
|
|||
scheduled runtime - a call to ``trio.run()``.
|
||||
|
||||
We believe the system adheres to the `3 axioms`_ of an "`actor model`_"
|
||||
but likely **does not** look like what **you** probably *think* an "actor
|
||||
model" looks like, and that's **intentional**.
|
||||
but likely *does not* look like what *you* probably think an "actor
|
||||
model" looks like, and that's *intentional*.
|
||||
|
||||
|
||||
Where do i start!?
|
||||
------------------
|
||||
The first step to grok ``tractor`` is to get an intermediate
|
||||
knowledge of ``trio`` and **structured concurrency** B)
|
||||
|
||||
Some great places to start are,
|
||||
- the seminal `blog post`_
|
||||
- obviously the `trio docs`_
|
||||
- wikipedia's nascent SC_ page
|
||||
- the fancy diagrams @ libdill-docs_
|
||||
The first step to grok ``tractor`` is to get the basics of ``trio`` down.
|
||||
A great place to start is the `trio docs`_ and this `blog post`_.
|
||||
|
||||
|
||||
Features
|
||||
|
|
@ -602,7 +593,6 @@ matrix seems too hip, we're also mostly all in the the `trio gitter
|
|||
channel`_!
|
||||
|
||||
.. _structured concurrent: https://trio.discourse.group/t/concise-definition-of-structured-concurrency/228
|
||||
.. _distributed: https://en.wikipedia.org/wiki/Distributed_computing
|
||||
.. _multi-processing: https://en.wikipedia.org/wiki/Multiprocessing
|
||||
.. _trio: https://github.com/python-trio/trio
|
||||
.. _nurseries: https://vorpus.org/blog/notes-on-structured-concurrency-or-go-statement-considered-harmful/#nurseries-a-structured-replacement-for-go-statements
|
||||
|
|
@ -621,9 +611,8 @@ channel`_!
|
|||
.. _trio docs: https://trio.readthedocs.io/en/latest/
|
||||
.. _blog post: https://vorpus.org/blog/notes-on-structured-concurrency-or-go-statement-considered-harmful/
|
||||
.. _structured concurrency: https://en.wikipedia.org/wiki/Structured_concurrency
|
||||
.. _SC: https://en.wikipedia.org/wiki/Structured_concurrency
|
||||
.. _libdill-docs: https://sustrik.github.io/libdill/structured-concurrency.html
|
||||
.. _structured chadcurrency: https://en.wikipedia.org/wiki/Structured_concurrency
|
||||
.. _structured concurrency: https://en.wikipedia.org/wiki/Structured_concurrency
|
||||
.. _unrequirements: https://en.wikipedia.org/wiki/Actor_model#Direct_communication_and_asynchrony
|
||||
.. _async generators: https://www.python.org/dev/peps/pep-0525/
|
||||
.. _trio-parallel: https://github.com/richardsheridan/trio-parallel
|
||||
|
|
|
|||
|
|
@ -1,117 +0,0 @@
|
|||
import asyncio
|
||||
|
||||
import trio
|
||||
import tractor
|
||||
from tractor import to_asyncio
|
||||
|
||||
|
||||
async def aio_sleep_forever():
|
||||
await asyncio.sleep(float('inf'))
|
||||
|
||||
|
||||
async def bp_then_error(
|
||||
to_trio: trio.MemorySendChannel,
|
||||
from_trio: asyncio.Queue,
|
||||
|
||||
raise_after_bp: bool = True,
|
||||
|
||||
) -> None:
|
||||
|
||||
# sync with ``trio``-side (caller) task
|
||||
to_trio.send_nowait('start')
|
||||
|
||||
# NOTE: what happens here inside the hook needs some refinement..
|
||||
# => seems like it's still `._debug._set_trace()` but
|
||||
# we set `Lock.local_task_in_debug = 'sync'`, we probably want
|
||||
# some further, at least, meta-data about the task/actoq in debug
|
||||
# in terms of making it clear it's asyncio mucking about.
|
||||
breakpoint()
|
||||
|
||||
# short checkpoint / delay
|
||||
await asyncio.sleep(0.5)
|
||||
|
||||
if raise_after_bp:
|
||||
raise ValueError('blah')
|
||||
|
||||
# TODO: test case with this so that it gets cancelled?
|
||||
else:
|
||||
# XXX NOTE: this is required in order to get the SIGINT-ignored
|
||||
# hang case documented in the module script section!
|
||||
await aio_sleep_forever()
|
||||
|
||||
|
||||
@tractor.context
|
||||
async def trio_ctx(
|
||||
ctx: tractor.Context,
|
||||
bp_before_started: bool = False,
|
||||
):
|
||||
|
||||
# this will block until the ``asyncio`` task sends a "first"
|
||||
# message, see first line in above func.
|
||||
async with (
|
||||
|
||||
to_asyncio.open_channel_from(
|
||||
bp_then_error,
|
||||
raise_after_bp=not bp_before_started,
|
||||
) as (first, chan),
|
||||
|
||||
trio.open_nursery() as n,
|
||||
):
|
||||
|
||||
assert first == 'start'
|
||||
|
||||
if bp_before_started:
|
||||
await tractor.breakpoint()
|
||||
|
||||
await ctx.started(first)
|
||||
|
||||
n.start_soon(
|
||||
to_asyncio.run_task,
|
||||
aio_sleep_forever,
|
||||
)
|
||||
await trio.sleep_forever()
|
||||
|
||||
|
||||
async def main(
|
||||
bps_all_over: bool = False,
|
||||
|
||||
) -> None:
|
||||
|
||||
async with tractor.open_nursery() as n:
|
||||
|
||||
p = await n.start_actor(
|
||||
'aio_daemon',
|
||||
enable_modules=[__name__],
|
||||
infect_asyncio=True,
|
||||
debug_mode=True,
|
||||
loglevel='cancel',
|
||||
)
|
||||
|
||||
async with p.open_context(
|
||||
trio_ctx,
|
||||
bp_before_started=bps_all_over,
|
||||
) as (ctx, first):
|
||||
|
||||
assert first == 'start'
|
||||
|
||||
if bps_all_over:
|
||||
await tractor.breakpoint()
|
||||
|
||||
# await trio.sleep_forever()
|
||||
await ctx.cancel()
|
||||
assert 0
|
||||
|
||||
# TODO: case where we cancel from trio-side while asyncio task
|
||||
# has debugger lock?
|
||||
# await p.cancel_actor()
|
||||
|
||||
|
||||
if __name__ == '__main__':
|
||||
|
||||
# works fine B)
|
||||
trio.run(main)
|
||||
|
||||
# will hang and ignores SIGINT !!
|
||||
# NOTE: you'll need to send a SIGQUIT (via ctl-\) to kill it
|
||||
# manually..
|
||||
# trio.run(main, True)
|
||||
|
|
@ -6,4 +6,3 @@ mypy
|
|||
trio_typing
|
||||
pexpect
|
||||
towncrier
|
||||
numpy
|
||||
|
|
|
|||
|
|
@ -49,7 +49,7 @@ async def worker(
|
|||
await ctx.started()
|
||||
|
||||
async with ctx.open_stream(
|
||||
allow_overruns=True,
|
||||
backpressure=True,
|
||||
) as stream:
|
||||
|
||||
# TODO: this with the below assert causes a hang bug?
|
||||
|
|
|
|||
|
|
@ -13,10 +13,7 @@ from typing import Optional
|
|||
import pytest
|
||||
import trio
|
||||
import tractor
|
||||
from tractor._exceptions import (
|
||||
StreamOverrun,
|
||||
ContextCancelled,
|
||||
)
|
||||
from tractor._exceptions import StreamOverrun
|
||||
|
||||
from conftest import tractor_test
|
||||
|
||||
|
|
@ -94,10 +91,7 @@ async def not_started_but_stream_opened(
|
|||
|
||||
@pytest.mark.parametrize(
|
||||
'target',
|
||||
[
|
||||
too_many_starteds,
|
||||
not_started_but_stream_opened,
|
||||
],
|
||||
[too_many_starteds, not_started_but_stream_opened],
|
||||
ids='misuse_type={}'.format,
|
||||
)
|
||||
def test_started_misuse(target):
|
||||
|
|
@ -234,88 +228,6 @@ def test_simple_context(
|
|||
trio.run(main)
|
||||
|
||||
|
||||
@pytest.mark.parametrize(
|
||||
'callee_returns_early',
|
||||
[True, False],
|
||||
ids=lambda item: f'callee_returns_early={item}'
|
||||
)
|
||||
@pytest.mark.parametrize(
|
||||
'cancel_method',
|
||||
['ctx', 'portal'],
|
||||
ids=lambda item: f'cancel_method={item}'
|
||||
)
|
||||
@pytest.mark.parametrize(
|
||||
'chk_ctx_result_before_exit',
|
||||
[True, False],
|
||||
ids=lambda item: f'chk_ctx_result_before_exit={item}'
|
||||
)
|
||||
def test_caller_cancels(
|
||||
cancel_method: str,
|
||||
chk_ctx_result_before_exit: bool,
|
||||
callee_returns_early: bool,
|
||||
):
|
||||
'''
|
||||
Verify that when the opening side of a context (aka the caller)
|
||||
cancels that context, the ctx does not raise a cancelled when
|
||||
either calling `.result()` or on context exit.
|
||||
|
||||
'''
|
||||
async def check_canceller(
|
||||
ctx: tractor.Context,
|
||||
) -> None:
|
||||
# should not raise yet return the remote
|
||||
# context cancelled error.
|
||||
res = await ctx.result()
|
||||
|
||||
if callee_returns_early:
|
||||
assert res == 'yo'
|
||||
|
||||
else:
|
||||
err = res
|
||||
assert isinstance(err, ContextCancelled)
|
||||
assert (
|
||||
tuple(err.canceller)
|
||||
==
|
||||
tractor.current_actor().uid
|
||||
)
|
||||
|
||||
async def main():
|
||||
async with tractor.open_nursery() as nursery:
|
||||
portal = await nursery.start_actor(
|
||||
'simple_context',
|
||||
enable_modules=[__name__],
|
||||
)
|
||||
timeout = 0.5 if not callee_returns_early else 2
|
||||
with trio.fail_after(timeout):
|
||||
async with portal.open_context(
|
||||
simple_setup_teardown,
|
||||
data=10,
|
||||
block_forever=not callee_returns_early,
|
||||
) as (ctx, sent):
|
||||
|
||||
if callee_returns_early:
|
||||
# ensure we block long enough before sending
|
||||
# a cancel such that the callee has already
|
||||
# returned it's result.
|
||||
await trio.sleep(0.5)
|
||||
|
||||
if cancel_method == 'ctx':
|
||||
await ctx.cancel()
|
||||
else:
|
||||
await portal.cancel_actor()
|
||||
|
||||
if chk_ctx_result_before_exit:
|
||||
await check_canceller(ctx)
|
||||
|
||||
if not chk_ctx_result_before_exit:
|
||||
await check_canceller(ctx)
|
||||
|
||||
if cancel_method != 'portal':
|
||||
await portal.cancel_actor()
|
||||
|
||||
trio.run(main)
|
||||
|
||||
|
||||
# basic stream terminations:
|
||||
# - callee context closes without using stream
|
||||
# - caller context closes without using stream
|
||||
|
|
@ -594,6 +506,7 @@ async def test_callee_cancels_before_started():
|
|||
cancel_self,
|
||||
) as (ctx, sent):
|
||||
async with ctx.open_stream():
|
||||
|
||||
await trio.sleep_forever()
|
||||
|
||||
# raises a special cancel signal
|
||||
|
|
@ -646,6 +559,7 @@ async def keep_sending_from_callee(
|
|||
'overrun_by',
|
||||
[
|
||||
('caller', 1, never_open_stream),
|
||||
('cancel_caller_during_overrun', 1, never_open_stream),
|
||||
('callee', 0, keep_sending_from_callee),
|
||||
],
|
||||
ids='overrun_condition={}'.format,
|
||||
|
|
@ -675,13 +589,14 @@ def test_one_end_stream_not_opened(overrun_by):
|
|||
if 'caller' in overrunner:
|
||||
|
||||
async with ctx.open_stream() as stream:
|
||||
|
||||
# itersend +1 msg more then the buffer size
|
||||
# to cause the most basic overrun.
|
||||
for i in range(buf_size):
|
||||
print(f'sending {i}')
|
||||
await stream.send(i)
|
||||
|
||||
if 'cancel' in overrunner:
|
||||
# without this we block waiting on the child side
|
||||
await ctx.cancel()
|
||||
|
||||
else:
|
||||
# expect overrun error to be relayed back
|
||||
# and this sleep interrupted
|
||||
|
|
@ -695,9 +610,7 @@ def test_one_end_stream_not_opened(overrun_by):
|
|||
|
||||
# 2 overrun cases and the no overrun case (which pushes right up to
|
||||
# the msg limit)
|
||||
if (
|
||||
overrunner == 'caller'
|
||||
):
|
||||
if overrunner == 'caller' or 'cance' in overrunner:
|
||||
with pytest.raises(tractor.RemoteActorError) as excinfo:
|
||||
trio.run(main)
|
||||
|
||||
|
|
@ -721,102 +634,40 @@ async def echo_back_sequence(
|
|||
|
||||
ctx: tractor.Context,
|
||||
seq: list[int],
|
||||
wait_for_cancel: bool,
|
||||
allow_overruns_side: str,
|
||||
be_slow: bool = False,
|
||||
msg_buffer_size: int = 1,
|
||||
msg_buffer_size: Optional[int] = None,
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
Send endlessly on the calleee stream using a small buffer size
|
||||
setting on the contex to simulate backlogging that would normally
|
||||
cause overruns.
|
||||
Send endlessly on the calleee stream.
|
||||
|
||||
'''
|
||||
# NOTE: ensure that if the caller is expecting to cancel this task
|
||||
# that we stay echoing much longer then they are so we don't
|
||||
# return early instead of receive the cancel msg.
|
||||
total_batches: int = 1000 if wait_for_cancel else 6
|
||||
|
||||
await ctx.started()
|
||||
# await tractor.breakpoint()
|
||||
async with ctx.open_stream(
|
||||
msg_buffer_size=msg_buffer_size,
|
||||
|
||||
# literally the point of this test XD
|
||||
allow_overruns=(allow_overruns_side in {'child', 'both'}),
|
||||
) as stream:
|
||||
|
||||
# ensure mem chan settings are correct
|
||||
assert (
|
||||
ctx._send_chan._state.max_buffer_size
|
||||
==
|
||||
msg_buffer_size
|
||||
)
|
||||
|
||||
seq = list(seq) # bleh, msgpack sometimes ain't decoded right
|
||||
for _ in range(total_batches):
|
||||
seq = list(seq) # bleh, `msgpack`...
|
||||
count = 0
|
||||
while count < 3:
|
||||
batch = []
|
||||
async for msg in stream:
|
||||
batch.append(msg)
|
||||
if batch == seq:
|
||||
break
|
||||
|
||||
if be_slow:
|
||||
await trio.sleep(0.05)
|
||||
|
||||
print('callee waiting on next')
|
||||
|
||||
for msg in batch:
|
||||
print(f'callee sending {msg}')
|
||||
await stream.send(msg)
|
||||
|
||||
print(
|
||||
'EXITING CALLEEE:\n'
|
||||
f'{ctx.cancel_called_remote}'
|
||||
)
|
||||
return 'yo'
|
||||
count += 1
|
||||
|
||||
return 'yo'
|
||||
|
||||
|
||||
@pytest.mark.parametrize(
|
||||
# aka the side that will / should raise
|
||||
# and overrun under normal conditions.
|
||||
'allow_overruns_side',
|
||||
['parent', 'child', 'none', 'both'],
|
||||
ids=lambda item: f'allow_overruns_side={item}'
|
||||
)
|
||||
@pytest.mark.parametrize(
|
||||
# aka the side that will / should raise
|
||||
# and overrun under normal conditions.
|
||||
'slow_side',
|
||||
['parent', 'child'],
|
||||
ids=lambda item: f'slow_side={item}'
|
||||
)
|
||||
@pytest.mark.parametrize(
|
||||
'cancel_ctx',
|
||||
[True, False],
|
||||
ids=lambda item: f'cancel_ctx={item}'
|
||||
)
|
||||
def test_maybe_allow_overruns_stream(
|
||||
cancel_ctx: bool,
|
||||
slow_side: str,
|
||||
allow_overruns_side: str,
|
||||
loglevel: str,
|
||||
):
|
||||
def test_stream_backpressure():
|
||||
'''
|
||||
Demonstrate small overruns of each task back and forth
|
||||
on a stream not raising any errors by default by setting
|
||||
the ``allow_overruns=True``.
|
||||
|
||||
The original idea here was to show that if you set the feeder mem
|
||||
chan to a size smaller then the # of msgs sent you could could not
|
||||
get a `StreamOverrun` crash plus maybe get all the msgs that were
|
||||
sent. The problem with the "real backpressure" case is that due to
|
||||
the current arch it can result in the msg loop being blocked and thus
|
||||
blocking cancellation - which is like super bad. So instead this test
|
||||
had to be adjusted to more or less just "not send overrun errors" so
|
||||
as to handle the case where the sender just moreso cares about not getting
|
||||
errored out when it send to fast..
|
||||
on a stream not raising any errors by default.
|
||||
|
||||
'''
|
||||
async def main():
|
||||
|
|
@ -824,104 +675,38 @@ def test_maybe_allow_overruns_stream(
|
|||
portal = await n.start_actor(
|
||||
'callee_sends_forever',
|
||||
enable_modules=[__name__],
|
||||
loglevel=loglevel,
|
||||
|
||||
# debug_mode=True,
|
||||
)
|
||||
seq = list(range(10))
|
||||
seq = list(range(3))
|
||||
async with portal.open_context(
|
||||
echo_back_sequence,
|
||||
seq=seq,
|
||||
wait_for_cancel=cancel_ctx,
|
||||
be_slow=(slow_side == 'child'),
|
||||
allow_overruns_side=allow_overruns_side,
|
||||
msg_buffer_size=1,
|
||||
) as (ctx, sent):
|
||||
|
||||
assert sent is None
|
||||
|
||||
async with ctx.open_stream(
|
||||
msg_buffer_size=1 if slow_side == 'parent' else None,
|
||||
allow_overruns=(allow_overruns_side in {'parent', 'both'}),
|
||||
) as stream:
|
||||
|
||||
total_batches: int = 2
|
||||
for _ in range(total_batches):
|
||||
async with ctx.open_stream(msg_buffer_size=1) as stream:
|
||||
count = 0
|
||||
while count < 3:
|
||||
for msg in seq:
|
||||
# print(f'root tx {msg}')
|
||||
print(f'caller sending {msg}')
|
||||
await stream.send(msg)
|
||||
if slow_side == 'parent':
|
||||
# NOTE: we make the parent slightly
|
||||
# slower, when it is slow, to make sure
|
||||
# that in the overruns everywhere case
|
||||
await trio.sleep(0.16)
|
||||
await trio.sleep(0.1)
|
||||
|
||||
batch = []
|
||||
async for msg in stream:
|
||||
print(f'root rx {msg}')
|
||||
batch.append(msg)
|
||||
if batch == seq:
|
||||
break
|
||||
|
||||
if cancel_ctx:
|
||||
# cancel the remote task
|
||||
print('sending root side cancel')
|
||||
await ctx.cancel()
|
||||
count += 1
|
||||
|
||||
res = await ctx.result()
|
||||
|
||||
if cancel_ctx:
|
||||
assert isinstance(res, ContextCancelled)
|
||||
assert tuple(res.canceller) == tractor.current_actor().uid
|
||||
|
||||
else:
|
||||
print(f'RX ROOT SIDE RESULT {res}')
|
||||
assert res == 'yo'
|
||||
# here the context should return
|
||||
assert await ctx.result() == 'yo'
|
||||
|
||||
# cancel the daemon
|
||||
await portal.cancel_actor()
|
||||
|
||||
if (
|
||||
allow_overruns_side == 'both'
|
||||
or slow_side == allow_overruns_side
|
||||
):
|
||||
trio.run(main)
|
||||
|
||||
elif (
|
||||
slow_side != allow_overruns_side
|
||||
):
|
||||
|
||||
with pytest.raises(tractor.RemoteActorError) as excinfo:
|
||||
trio.run(main)
|
||||
|
||||
err = excinfo.value
|
||||
|
||||
if (
|
||||
allow_overruns_side == 'none'
|
||||
):
|
||||
# depends on timing is is racy which side will
|
||||
# overrun first :sadkitty:
|
||||
|
||||
# NOTE: i tried to isolate to a deterministic case here
|
||||
# based on timeing, but i was kinda wasted, and i don't
|
||||
# think it's sane to catch them..
|
||||
assert err.type in (
|
||||
tractor.RemoteActorError,
|
||||
StreamOverrun,
|
||||
)
|
||||
|
||||
elif (
|
||||
slow_side == 'child'
|
||||
):
|
||||
assert err.type == StreamOverrun
|
||||
|
||||
elif slow_side == 'parent':
|
||||
assert err.type == tractor.RemoteActorError
|
||||
assert 'StreamOverrun' in err.msgdata['tb_str']
|
||||
|
||||
else:
|
||||
# if this hits the logic blocks from above are not
|
||||
# exhaustive..
|
||||
pytest.fail('PARAMETRIZED CASE GEN PROBLEM YO')
|
||||
trio.run(main)
|
||||
|
||||
|
||||
@tractor.context
|
||||
|
|
@ -952,18 +737,18 @@ async def attach_to_sleep_forever():
|
|||
finally:
|
||||
# XXX: previously this would trigger local
|
||||
# ``ContextCancelled`` to be received and raised in the
|
||||
# local context overriding any local error due to logic
|
||||
# inside ``_invoke()`` which checked for an error set on
|
||||
# ``Context._error`` and raised it in a cancellation
|
||||
# scenario.
|
||||
# ------
|
||||
# The problem is you can have a remote cancellation that
|
||||
# is part of a local error and we shouldn't raise
|
||||
# ``ContextCancelled`` **iff** we **were not** the side
|
||||
# of the context to initiate it, i.e.
|
||||
# local context overriding any local error due to
|
||||
# logic inside ``_invoke()`` which checked for
|
||||
# an error set on ``Context._error`` and raised it in
|
||||
# under a cancellation scenario.
|
||||
|
||||
# The problem is you can have a remote cancellation
|
||||
# that is part of a local error and we shouldn't raise
|
||||
# ``ContextCancelled`` **iff** we weren't the side of
|
||||
# the context to initiate it, i.e.
|
||||
# ``Context._cancel_called`` should **NOT** have been
|
||||
# set. The special logic to handle this case is now
|
||||
# inside ``Context._maybe_raise_from_remote_msg()`` XD
|
||||
# inside ``Context._may_raise_from_remote_msg()`` XD
|
||||
await peer_ctx.cancel()
|
||||
|
||||
|
||||
|
|
@ -984,10 +769,9 @@ async def error_before_started(
|
|||
|
||||
def test_do_not_swallow_error_before_started_by_remote_contextcancelled():
|
||||
'''
|
||||
Verify that an error raised in a remote context which itself opens
|
||||
another remote context, which it cancels, does not ovverride the
|
||||
original error that caused the cancellation of the secondardy
|
||||
context.
|
||||
Verify that an error raised in a remote context which itself opens another
|
||||
remote context, which it cancels, does not ovverride the original error that
|
||||
caused the cancellation of the secondardy context.
|
||||
|
||||
'''
|
||||
async def main():
|
||||
|
|
|
|||
|
|
@ -15,7 +15,6 @@ import tractor
|
|||
from tractor import (
|
||||
to_asyncio,
|
||||
RemoteActorError,
|
||||
ContextCancelled,
|
||||
)
|
||||
from tractor.trionics import BroadcastReceiver
|
||||
|
||||
|
|
@ -225,23 +224,14 @@ def test_context_spawns_aio_task_that_errors(
|
|||
|
||||
await trio.sleep_forever()
|
||||
|
||||
return await ctx.result()
|
||||
with pytest.raises(RemoteActorError) as excinfo:
|
||||
trio.run(main)
|
||||
|
||||
err = excinfo.value
|
||||
assert isinstance(err, RemoteActorError)
|
||||
if parent_cancels:
|
||||
# bc the parent made the cancel request,
|
||||
# the error is not raised locally but instead
|
||||
# the context is exited silently
|
||||
res = trio.run(main)
|
||||
assert isinstance(res, ContextCancelled)
|
||||
assert 'root' in res.canceller[0]
|
||||
|
||||
assert err.type == trio.Cancelled
|
||||
else:
|
||||
expect = RemoteActorError
|
||||
with pytest.raises(expect) as excinfo:
|
||||
trio.run(main)
|
||||
|
||||
err = excinfo.value
|
||||
assert isinstance(err, expect)
|
||||
assert err.type == AssertionError
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -1,167 +0,0 @@
|
|||
"""
|
||||
Shared mem primitives and APIs.
|
||||
|
||||
"""
|
||||
import uuid
|
||||
|
||||
# import numpy
|
||||
import pytest
|
||||
import trio
|
||||
import tractor
|
||||
from tractor._shm import (
|
||||
open_shm_list,
|
||||
attach_shm_list,
|
||||
)
|
||||
|
||||
|
||||
@tractor.context
|
||||
async def child_attach_shml_alot(
|
||||
ctx: tractor.Context,
|
||||
shm_key: str,
|
||||
) -> None:
|
||||
|
||||
await ctx.started(shm_key)
|
||||
|
||||
# now try to attach a boatload of times in a loop..
|
||||
for _ in range(1000):
|
||||
shml = attach_shm_list(
|
||||
key=shm_key,
|
||||
readonly=False,
|
||||
)
|
||||
assert shml.shm.name == shm_key
|
||||
await trio.sleep(0.001)
|
||||
|
||||
|
||||
def test_child_attaches_alot():
|
||||
async def main():
|
||||
async with tractor.open_nursery() as an:
|
||||
|
||||
# allocate writeable list in parent
|
||||
key = f'shml_{uuid.uuid4()}'
|
||||
shml = open_shm_list(
|
||||
key=key,
|
||||
)
|
||||
|
||||
portal = await an.start_actor(
|
||||
'shm_attacher',
|
||||
enable_modules=[__name__],
|
||||
)
|
||||
|
||||
async with (
|
||||
portal.open_context(
|
||||
child_attach_shml_alot,
|
||||
shm_key=shml.key,
|
||||
) as (ctx, start_val),
|
||||
):
|
||||
assert start_val == key
|
||||
await ctx.result()
|
||||
|
||||
await portal.cancel_actor()
|
||||
|
||||
trio.run(main)
|
||||
|
||||
|
||||
@tractor.context
|
||||
async def child_read_shm_list(
|
||||
ctx: tractor.Context,
|
||||
shm_key: str,
|
||||
use_str: bool,
|
||||
frame_size: int,
|
||||
) -> None:
|
||||
|
||||
# attach in child
|
||||
shml = attach_shm_list(
|
||||
key=shm_key,
|
||||
# dtype=str if use_str else float,
|
||||
)
|
||||
await ctx.started(shml.key)
|
||||
|
||||
async with ctx.open_stream() as stream:
|
||||
async for i in stream:
|
||||
print(f'(child): reading shm list index: {i}')
|
||||
|
||||
if use_str:
|
||||
expect = str(float(i))
|
||||
else:
|
||||
expect = float(i)
|
||||
|
||||
if frame_size == 1:
|
||||
val = shml[i]
|
||||
assert expect == val
|
||||
print(f'(child): reading value: {val}')
|
||||
else:
|
||||
frame = shml[i - frame_size:i]
|
||||
print(f'(child): reading frame: {frame}')
|
||||
|
||||
|
||||
@pytest.mark.parametrize(
|
||||
'use_str',
|
||||
[False, True],
|
||||
ids=lambda i: f'use_str_values={i}',
|
||||
)
|
||||
@pytest.mark.parametrize(
|
||||
'frame_size',
|
||||
[1, 2**6, 2**10],
|
||||
ids=lambda i: f'frame_size={i}',
|
||||
)
|
||||
def test_parent_writer_child_reader(
|
||||
use_str: bool,
|
||||
frame_size: int,
|
||||
):
|
||||
|
||||
async def main():
|
||||
async with tractor.open_nursery(
|
||||
# debug_mode=True,
|
||||
) as an:
|
||||
|
||||
portal = await an.start_actor(
|
||||
'shm_reader',
|
||||
enable_modules=[__name__],
|
||||
debug_mode=True,
|
||||
)
|
||||
|
||||
# allocate writeable list in parent
|
||||
key = 'shm_list'
|
||||
seq_size = int(2 * 2 ** 10)
|
||||
shml = open_shm_list(
|
||||
key=key,
|
||||
size=seq_size,
|
||||
dtype=str if use_str else float,
|
||||
readonly=False,
|
||||
)
|
||||
|
||||
async with (
|
||||
portal.open_context(
|
||||
child_read_shm_list,
|
||||
shm_key=key,
|
||||
use_str=use_str,
|
||||
frame_size=frame_size,
|
||||
) as (ctx, sent),
|
||||
|
||||
ctx.open_stream() as stream,
|
||||
):
|
||||
|
||||
assert sent == key
|
||||
|
||||
for i in range(seq_size):
|
||||
|
||||
val = float(i)
|
||||
if use_str:
|
||||
val = str(val)
|
||||
|
||||
# print(f'(parent): writing {val}')
|
||||
shml[i] = val
|
||||
|
||||
# only on frame fills do we
|
||||
# signal to the child that a frame's
|
||||
# worth is ready.
|
||||
if (i % frame_size) == 0:
|
||||
print(f'(parent): signalling frame full on {val}')
|
||||
await stream.send(i)
|
||||
else:
|
||||
print(f'(parent): signalling final frame on {val}')
|
||||
await stream.send(i)
|
||||
|
||||
await portal.cancel_actor()
|
||||
|
||||
trio.run(main)
|
||||
|
|
@ -86,7 +86,7 @@ async def open_sequence_streamer(
|
|||
) as (ctx, first):
|
||||
|
||||
assert first is None
|
||||
async with ctx.open_stream(allow_overruns=True) as stream:
|
||||
async with ctx.open_stream(backpressure=True) as stream:
|
||||
yield stream
|
||||
|
||||
await portal.cancel_actor()
|
||||
|
|
@ -413,8 +413,8 @@ def test_ensure_slow_consumers_lag_out(
|
|||
seq = brx._state.subs[brx.key]
|
||||
assert seq == len(brx._state.queue) - 1
|
||||
|
||||
# all no_overruns entries in the underlying
|
||||
# channel should have been copied into the bcaster
|
||||
# all backpressured entries in the underlying
|
||||
# channel should have been copied into the caster
|
||||
# queue trailing-window
|
||||
async for i in rx:
|
||||
print(f'bped: {i}')
|
||||
|
|
|
|||
|
|
@ -15,19 +15,18 @@
|
|||
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
"""
|
||||
tractor: structured concurrent ``trio``-"actors".
|
||||
tractor: structured concurrent "actors".
|
||||
|
||||
"""
|
||||
from exceptiongroup import BaseExceptionGroup
|
||||
|
||||
from ._clustering import open_actor_cluster
|
||||
from ._context import (
|
||||
Context,
|
||||
context,
|
||||
)
|
||||
from ._ipc import Channel
|
||||
from ._streaming import (
|
||||
Context,
|
||||
MsgStream,
|
||||
stream,
|
||||
context,
|
||||
)
|
||||
from ._discovery import (
|
||||
get_arbiter,
|
||||
|
|
@ -47,8 +46,6 @@ from ._exceptions import (
|
|||
)
|
||||
from ._debug import (
|
||||
breakpoint,
|
||||
pause,
|
||||
pause_from_sync,
|
||||
post_mortem,
|
||||
)
|
||||
from . import msg
|
||||
|
|
@ -56,35 +53,31 @@ from ._root import (
|
|||
run_daemon,
|
||||
open_root_actor,
|
||||
)
|
||||
from ._ipc import Channel
|
||||
from ._portal import Portal
|
||||
from ._runtime import Actor
|
||||
|
||||
|
||||
__all__ = [
|
||||
'Actor',
|
||||
'BaseExceptionGroup',
|
||||
'Channel',
|
||||
'Context',
|
||||
'ContextCancelled',
|
||||
'ModuleNotExposed',
|
||||
'MsgStream',
|
||||
'BaseExceptionGroup',
|
||||
'Portal',
|
||||
'RemoteActorError',
|
||||
'breakpoint',
|
||||
'context',
|
||||
'current_actor',
|
||||
'find_actor',
|
||||
'query_actor',
|
||||
'get_arbiter',
|
||||
'is_root_process',
|
||||
'msg',
|
||||
'open_actor_cluster',
|
||||
'open_nursery',
|
||||
'open_root_actor',
|
||||
'pause',
|
||||
'post_mortem',
|
||||
'pause_from_sync',
|
||||
'query_actor',
|
||||
'run_daemon',
|
||||
'stream',
|
||||
|
|
|
|||
|
|
@ -1,778 +0,0 @@
|
|||
# tractor: structured concurrent "actors".
|
||||
# Copyright 2018-eternity Tyler Goodlet.
|
||||
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Affero General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU Affero General Public License for more details.
|
||||
|
||||
# You should have received a copy of the GNU Affero General Public License
|
||||
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
'''
|
||||
The fundamental cross process SC abstraction: an inter-actor,
|
||||
cancel-scope linked task "context".
|
||||
|
||||
A ``Context`` is very similar to the ``trio.Nursery.cancel_scope`` built
|
||||
into each ``trio.Nursery`` except it links the lifetimes of memory space
|
||||
disjoint, parallel executing tasks in separate actors.
|
||||
|
||||
'''
|
||||
from __future__ import annotations
|
||||
from collections import deque
|
||||
from contextlib import asynccontextmanager as acm
|
||||
from dataclasses import (
|
||||
dataclass,
|
||||
field,
|
||||
)
|
||||
from functools import partial
|
||||
import inspect
|
||||
from pprint import pformat
|
||||
from typing import (
|
||||
Any,
|
||||
Callable,
|
||||
AsyncGenerator,
|
||||
TYPE_CHECKING,
|
||||
)
|
||||
import warnings
|
||||
|
||||
import trio
|
||||
|
||||
from ._exceptions import (
|
||||
unpack_error,
|
||||
pack_error,
|
||||
ContextCancelled,
|
||||
StreamOverrun,
|
||||
)
|
||||
from .log import get_logger
|
||||
from ._ipc import Channel
|
||||
from ._streaming import MsgStream
|
||||
from ._state import current_actor
|
||||
|
||||
if TYPE_CHECKING:
|
||||
from ._portal import Portal
|
||||
|
||||
|
||||
log = get_logger(__name__)
|
||||
|
||||
|
||||
@dataclass
|
||||
class Context:
|
||||
'''
|
||||
An inter-actor, ``trio``-task communication context.
|
||||
|
||||
NB: This class should never be instatiated directly, it is delivered
|
||||
by either,
|
||||
- runtime machinery to a remotely started task or,
|
||||
- by entering ``Portal.open_context()``.
|
||||
|
||||
and is always constructed using ``mkt_context()``.
|
||||
|
||||
Allows maintaining task or protocol specific state between
|
||||
2 communicating, parallel executing actor tasks. A unique context is
|
||||
allocated on each side of any task RPC-linked msg dialog, for
|
||||
every request to a remote actor from a portal. On the "callee"
|
||||
side a context is always allocated inside ``._runtime._invoke()``.
|
||||
|
||||
A context can be cancelled and (possibly eventually restarted) from
|
||||
either side of the underlying IPC channel, it can also open task
|
||||
oriented message streams, and acts more or less as an IPC aware
|
||||
inter-actor-task ``trio.CancelScope``.
|
||||
|
||||
'''
|
||||
chan: Channel
|
||||
cid: str
|
||||
|
||||
# these are the "feeder" channels for delivering
|
||||
# message values to the local task from the runtime
|
||||
# msg processing loop.
|
||||
_recv_chan: trio.MemoryReceiveChannel
|
||||
_send_chan: trio.MemorySendChannel
|
||||
|
||||
_remote_func_type: str | None = None
|
||||
|
||||
# only set on the caller side
|
||||
_portal: Portal | None = None # type: ignore # noqa
|
||||
_result: Any | int = None
|
||||
_remote_error: BaseException | None = None
|
||||
|
||||
# cancellation state
|
||||
_cancel_called: bool = False
|
||||
_cancelled_remote: tuple | None = None
|
||||
_cancel_msg: str | None = None
|
||||
_scope: trio.CancelScope | None = None
|
||||
_enter_debugger_on_cancel: bool = True
|
||||
|
||||
@property
|
||||
def cancel_called(self) -> bool:
|
||||
'''
|
||||
Records whether cancellation has been requested for this context
|
||||
by either an explicit call to ``.cancel()`` or an implicit call
|
||||
due to an error caught inside the ``Portal.open_context()``
|
||||
block.
|
||||
|
||||
'''
|
||||
return self._cancel_called
|
||||
|
||||
@property
|
||||
def cancel_called_remote(self) -> tuple[str, str] | None:
|
||||
'''
|
||||
``Actor.uid`` of the remote actor who's task was cancelled
|
||||
causing this side of the context to also be cancelled.
|
||||
|
||||
'''
|
||||
remote_uid = self._cancelled_remote
|
||||
if remote_uid:
|
||||
return tuple(remote_uid)
|
||||
|
||||
@property
|
||||
def cancelled_caught(self) -> bool:
|
||||
return self._scope.cancelled_caught
|
||||
|
||||
# init and streaming state
|
||||
_started_called: bool = False
|
||||
_started_received: bool = False
|
||||
_stream_opened: bool = False
|
||||
|
||||
# overrun handling machinery
|
||||
# NOTE: none of this provides "backpressure" to the remote
|
||||
# task, only an ability to not lose messages when the local
|
||||
# task is configured to NOT transmit ``StreamOverrun``s back
|
||||
# to the other side.
|
||||
_overflow_q: deque[dict] = field(
|
||||
default_factory=partial(
|
||||
deque,
|
||||
maxlen=616,
|
||||
)
|
||||
)
|
||||
_scope_nursery: trio.Nursery | None = None
|
||||
_in_overrun: bool = False
|
||||
_allow_overruns: bool = False
|
||||
|
||||
async def send_yield(
|
||||
self,
|
||||
data: Any,
|
||||
|
||||
) -> None:
|
||||
|
||||
warnings.warn(
|
||||
"`Context.send_yield()` is now deprecated. "
|
||||
"Use ``MessageStream.send()``. ",
|
||||
DeprecationWarning,
|
||||
stacklevel=2,
|
||||
)
|
||||
await self.chan.send({'yield': data, 'cid': self.cid})
|
||||
|
||||
async def send_stop(self) -> None:
|
||||
await self.chan.send({'stop': True, 'cid': self.cid})
|
||||
|
||||
async def _maybe_cancel_and_set_remote_error(
|
||||
self,
|
||||
error_msg: dict[str, Any],
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
(Maybe) unpack and raise a msg error into the local scope
|
||||
nursery for this context.
|
||||
|
||||
Acts as a form of "relay" for a remote error raised
|
||||
in the corresponding remote callee task.
|
||||
|
||||
'''
|
||||
# If this is an error message from a context opened by
|
||||
# ``Portal.open_context()`` we want to interrupt any ongoing
|
||||
# (child) tasks within that context to be notified of the remote
|
||||
# error relayed here.
|
||||
#
|
||||
# The reason we may want to raise the remote error immediately
|
||||
# is that there is no guarantee the associated local task(s)
|
||||
# will attempt to read from any locally opened stream any time
|
||||
# soon.
|
||||
#
|
||||
# NOTE: this only applies when
|
||||
# ``Portal.open_context()`` has been called since it is assumed
|
||||
# (currently) that other portal APIs (``Portal.run()``,
|
||||
# ``.run_in_actor()``) do their own error checking at the point
|
||||
# of the call and result processing.
|
||||
error = unpack_error(
|
||||
error_msg,
|
||||
self.chan,
|
||||
)
|
||||
|
||||
# XXX: set the remote side's error so that after we cancel
|
||||
# whatever task is the opener of this context it can raise
|
||||
# that error as the reason.
|
||||
self._remote_error = error
|
||||
|
||||
# always record the remote actor's uid since its cancellation
|
||||
# state is directly linked to ours (the local one).
|
||||
self._cancelled_remote = self.chan.uid
|
||||
|
||||
if (
|
||||
isinstance(error, ContextCancelled)
|
||||
):
|
||||
log.cancel(
|
||||
'Remote task-context sucessfully cancelled for '
|
||||
f'{self.chan.uid}:{self.cid}'
|
||||
)
|
||||
|
||||
if self._cancel_called:
|
||||
# from ._debug import breakpoint
|
||||
# await breakpoint()
|
||||
|
||||
# this is an expected cancel request response message
|
||||
# and we **don't need to raise it** in local cancel
|
||||
# scope since it will potentially override a real error.
|
||||
return
|
||||
else:
|
||||
log.error(
|
||||
f'Remote context error for {self.chan.uid}:{self.cid}:\n'
|
||||
f'{error_msg["error"]["tb_str"]}'
|
||||
)
|
||||
# TODO: tempted to **not** do this by-reraising in a
|
||||
# nursery and instead cancel a surrounding scope, detect
|
||||
# the cancellation, then lookup the error that was set?
|
||||
# YES! this is way better and simpler!
|
||||
if (
|
||||
self._scope
|
||||
):
|
||||
# from trio.testing import wait_all_tasks_blocked
|
||||
# await wait_all_tasks_blocked()
|
||||
# self._cancelled_remote = self.chan.uid
|
||||
self._scope.cancel()
|
||||
|
||||
# NOTE: this usage actually works here B)
|
||||
# from ._debug import breakpoint
|
||||
# await breakpoint()
|
||||
|
||||
# XXX: this will break early callee results sending
|
||||
# since when `.result()` is finally called, this
|
||||
# chan will be closed..
|
||||
# if self._recv_chan:
|
||||
# await self._recv_chan.aclose()
|
||||
|
||||
async def cancel(
|
||||
self,
|
||||
msg: str | None = None,
|
||||
timeout: float = 0.616,
|
||||
# timeout: float = 1000,
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
Cancel this inter-actor-task context.
|
||||
|
||||
Request that the far side cancel it's current linked context,
|
||||
Timeout quickly in an attempt to sidestep 2-generals...
|
||||
|
||||
'''
|
||||
side = 'caller' if self._portal else 'callee'
|
||||
if msg:
|
||||
assert side == 'callee', 'Only callee side can provide cancel msg'
|
||||
|
||||
log.cancel(f'Cancelling {side} side of context to {self.chan.uid}')
|
||||
|
||||
self._cancel_called = True
|
||||
# await _debug.breakpoint()
|
||||
# breakpoint()
|
||||
|
||||
if side == 'caller':
|
||||
if not self._portal:
|
||||
raise RuntimeError(
|
||||
"No portal found, this is likely a callee side context"
|
||||
)
|
||||
|
||||
cid = self.cid
|
||||
with trio.move_on_after(timeout) as cs:
|
||||
cs.shield = True
|
||||
log.cancel(
|
||||
f"Cancelling stream {cid} to "
|
||||
f"{self._portal.channel.uid}")
|
||||
|
||||
# NOTE: we're telling the far end actor to cancel a task
|
||||
# corresponding to *this actor*. The far end local channel
|
||||
# instance is passed to `Actor._cancel_task()` implicitly.
|
||||
await self._portal.run_from_ns(
|
||||
'self',
|
||||
'_cancel_task',
|
||||
cid=cid,
|
||||
)
|
||||
# print("EXITING CANCEL CALL")
|
||||
|
||||
if cs.cancelled_caught:
|
||||
# XXX: there's no way to know if the remote task was indeed
|
||||
# cancelled in the case where the connection is broken or
|
||||
# some other network error occurred.
|
||||
# if not self._portal.channel.connected():
|
||||
if not self.chan.connected():
|
||||
log.cancel(
|
||||
"May have failed to cancel remote task "
|
||||
f"{cid} for {self._portal.channel.uid}")
|
||||
else:
|
||||
log.cancel(
|
||||
"Timed out on cancelling remote task "
|
||||
f"{cid} for {self._portal.channel.uid}")
|
||||
|
||||
# callee side remote task
|
||||
else:
|
||||
self._cancel_msg = msg
|
||||
|
||||
# TODO: should we have an explicit cancel message
|
||||
# or is relaying the local `trio.Cancelled` as an
|
||||
# {'error': trio.Cancelled, cid: "blah"} enough?
|
||||
# This probably gets into the discussion in
|
||||
# https://github.com/goodboy/tractor/issues/36
|
||||
assert self._scope
|
||||
self._scope.cancel()
|
||||
|
||||
@acm
|
||||
async def open_stream(
|
||||
|
||||
self,
|
||||
allow_overruns: bool | None = False,
|
||||
msg_buffer_size: int | None = None,
|
||||
|
||||
) -> AsyncGenerator[MsgStream, None]:
|
||||
'''
|
||||
Open a ``MsgStream``, a bi-directional stream connected to the
|
||||
cross-actor (far end) task for this ``Context``.
|
||||
|
||||
This context manager must be entered on both the caller and
|
||||
callee for the stream to logically be considered "connected".
|
||||
|
||||
A ``MsgStream`` is currently "one-shot" use, meaning if you
|
||||
close it you can not "re-open" it for streaming and instead you
|
||||
must re-establish a new surrounding ``Context`` using
|
||||
``Portal.open_context()``. In the future this may change but
|
||||
currently there seems to be no obvious reason to support
|
||||
"re-opening":
|
||||
- pausing a stream can be done with a message.
|
||||
- task errors will normally require a restart of the entire
|
||||
scope of the inter-actor task context due to the nature of
|
||||
``trio``'s cancellation system.
|
||||
|
||||
'''
|
||||
actor = current_actor()
|
||||
|
||||
# here we create a mem chan that corresponds to the
|
||||
# far end caller / callee.
|
||||
|
||||
# Likewise if the surrounding context has been cancelled we error here
|
||||
# since it likely means the surrounding block was exited or
|
||||
# killed
|
||||
|
||||
if self._cancel_called:
|
||||
task = trio.lowlevel.current_task().name
|
||||
raise ContextCancelled(
|
||||
f'Context around {actor.uid[0]}:{task} was already cancelled!'
|
||||
)
|
||||
|
||||
if not self._portal and not self._started_called:
|
||||
raise RuntimeError(
|
||||
'Context.started()` must be called before opening a stream'
|
||||
)
|
||||
|
||||
# NOTE: in one way streaming this only happens on the
|
||||
# caller side inside `Actor.start_remote_task()` so if you try
|
||||
# to send a stop from the caller to the callee in the
|
||||
# single-direction-stream case you'll get a lookup error
|
||||
# currently.
|
||||
ctx = actor.get_context(
|
||||
self.chan,
|
||||
self.cid,
|
||||
msg_buffer_size=msg_buffer_size,
|
||||
allow_overruns=allow_overruns,
|
||||
)
|
||||
ctx._allow_overruns = allow_overruns
|
||||
assert ctx is self
|
||||
|
||||
# XXX: If the underlying channel feeder receive mem chan has
|
||||
# been closed then likely client code has already exited
|
||||
# a ``.open_stream()`` block prior or there was some other
|
||||
# unanticipated error or cancellation from ``trio``.
|
||||
|
||||
if ctx._recv_chan._closed:
|
||||
raise trio.ClosedResourceError(
|
||||
'The underlying channel for this stream was already closed!?')
|
||||
|
||||
async with MsgStream(
|
||||
ctx=self,
|
||||
rx_chan=ctx._recv_chan,
|
||||
) as stream:
|
||||
|
||||
if self._portal:
|
||||
self._portal._streams.add(stream)
|
||||
|
||||
try:
|
||||
self._stream_opened = True
|
||||
|
||||
# XXX: do we need this?
|
||||
# ensure we aren't cancelled before yielding the stream
|
||||
# await trio.lowlevel.checkpoint()
|
||||
yield stream
|
||||
|
||||
# NOTE: Make the stream "one-shot use". On exit, signal
|
||||
# ``trio.EndOfChannel``/``StopAsyncIteration`` to the
|
||||
# far end.
|
||||
await stream.aclose()
|
||||
|
||||
finally:
|
||||
if self._portal:
|
||||
try:
|
||||
self._portal._streams.remove(stream)
|
||||
except KeyError:
|
||||
log.warning(
|
||||
f'Stream was already destroyed?\n'
|
||||
f'actor: {self.chan.uid}\n'
|
||||
f'ctx id: {self.cid}'
|
||||
)
|
||||
|
||||
def _maybe_raise_remote_err(
|
||||
self,
|
||||
err: Exception,
|
||||
) -> None:
|
||||
# NOTE: whenever the context's "opener" side (task) **is**
|
||||
# the side which requested the cancellation (likekly via
|
||||
# ``Context.cancel()``), we don't want to re-raise that
|
||||
# cancellation signal locally (would be akin to
|
||||
# a ``trio.Nursery`` nursery raising ``trio.Cancelled``
|
||||
# whenever ``CancelScope.cancel()`` was called) and instead
|
||||
# silently reap the expected cancellation "error"-msg.
|
||||
# if 'pikerd' in err.msgdata['tb_str']:
|
||||
# # from . import _debug
|
||||
# # await _debug.breakpoint()
|
||||
# breakpoint()
|
||||
|
||||
if (
|
||||
isinstance(err, ContextCancelled)
|
||||
and (
|
||||
self._cancel_called
|
||||
or self.chan._cancel_called
|
||||
or tuple(err.canceller) == current_actor().uid
|
||||
)
|
||||
):
|
||||
return err
|
||||
|
||||
raise err # from None
|
||||
|
||||
async def result(self) -> Any | Exception:
|
||||
'''
|
||||
From some (caller) side task, wait for and return the final
|
||||
result from the remote (callee) side's task.
|
||||
|
||||
This provides a mechanism for one task running in some actor to wait
|
||||
on another task at the other side, in some other actor, to terminate.
|
||||
|
||||
If the remote task is still in a streaming state (it is delivering
|
||||
values from inside a ``Context.open_stream():`` block, then those
|
||||
msgs are drained but discarded since it is presumed this side of
|
||||
the context has already finished with its own streaming logic.
|
||||
|
||||
If the remote context (or its containing actor runtime) was
|
||||
canceled, either by a local task calling one of
|
||||
``Context.cancel()`` or `Portal.cancel_actor()``, we ignore the
|
||||
received ``ContextCancelled`` exception if the context or
|
||||
underlying IPC channel is marked as having been "cancel called".
|
||||
This is similar behavior to using ``trio.Nursery.cancel()``
|
||||
wherein tasks which raise ``trio.Cancel`` are silently reaped;
|
||||
the main different in this API is in the "cancel called" case,
|
||||
instead of just not raising, we also return the exception *as
|
||||
the result* since client code may be interested in the details
|
||||
of the remote cancellation.
|
||||
|
||||
'''
|
||||
assert self._portal, "Context.result() can not be called from callee!"
|
||||
assert self._recv_chan
|
||||
|
||||
# from . import _debug
|
||||
# await _debug.breakpoint()
|
||||
|
||||
re = self._remote_error
|
||||
if re:
|
||||
self._maybe_raise_remote_err(re)
|
||||
return re
|
||||
|
||||
if (
|
||||
self._result == id(self)
|
||||
and not self._remote_error
|
||||
and not self._recv_chan._closed # type: ignore
|
||||
):
|
||||
# wait for a final context result consuming
|
||||
# and discarding any bi dir stream msgs still
|
||||
# in transit from the far end.
|
||||
while True:
|
||||
msg = await self._recv_chan.receive()
|
||||
try:
|
||||
self._result = msg['return']
|
||||
|
||||
# NOTE: we don't need to do this right?
|
||||
# XXX: only close the rx mem chan AFTER
|
||||
# a final result is retreived.
|
||||
# if self._recv_chan:
|
||||
# await self._recv_chan.aclose()
|
||||
|
||||
break
|
||||
except KeyError: # as msgerr:
|
||||
|
||||
if 'yield' in msg:
|
||||
# far end task is still streaming to us so discard
|
||||
log.warning(f'Discarding stream delivered {msg}')
|
||||
continue
|
||||
|
||||
elif 'stop' in msg:
|
||||
log.debug('Remote stream terminated')
|
||||
continue
|
||||
|
||||
# internal error should never get here
|
||||
assert msg.get('cid'), (
|
||||
"Received internal error at portal?")
|
||||
|
||||
err = unpack_error(
|
||||
msg,
|
||||
self._portal.channel
|
||||
) # from msgerr
|
||||
|
||||
err = self._maybe_raise_remote_err(err)
|
||||
self._remote_err = err
|
||||
|
||||
return self._remote_error or self._result
|
||||
|
||||
async def started(
|
||||
self,
|
||||
value: Any | None = None
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
Indicate to calling actor's task that this linked context
|
||||
has started and send ``value`` to the other side.
|
||||
|
||||
On the calling side ``value`` is the second item delivered
|
||||
in the tuple returned by ``Portal.open_context()``.
|
||||
|
||||
'''
|
||||
if self._portal:
|
||||
raise RuntimeError(
|
||||
f"Caller side context {self} can not call started!")
|
||||
|
||||
elif self._started_called:
|
||||
raise RuntimeError(
|
||||
f"called 'started' twice on context with {self.chan.uid}")
|
||||
|
||||
await self.chan.send({'started': value, 'cid': self.cid})
|
||||
self._started_called = True
|
||||
|
||||
# TODO: do we need a restart api?
|
||||
# async def restart(self) -> None:
|
||||
# pass
|
||||
|
||||
async def _drain_overflows(
|
||||
self,
|
||||
) -> None:
|
||||
'''
|
||||
Private task spawned to push newly received msgs to the local
|
||||
task which getting overrun by the remote side.
|
||||
|
||||
In order to not block the rpc msg loop, but also not discard
|
||||
msgs received in this context, we need to async push msgs in
|
||||
a new task which only runs for as long as the local task is in
|
||||
an overrun state.
|
||||
|
||||
'''
|
||||
self._in_overrun = True
|
||||
try:
|
||||
while self._overflow_q:
|
||||
# NOTE: these msgs should never be errors since we always do
|
||||
# the check prior to checking if we're in an overrun state
|
||||
# inside ``.deliver_msg()``.
|
||||
msg = self._overflow_q.popleft()
|
||||
try:
|
||||
await self._send_chan.send(msg)
|
||||
except trio.BrokenResourceError:
|
||||
log.warning(
|
||||
f"{self._send_chan} consumer is already closed"
|
||||
)
|
||||
return
|
||||
except trio.Cancelled:
|
||||
# we are obviously still in overrun
|
||||
# but the context is being closed anyway
|
||||
# so we just warn that there are un received
|
||||
# msgs still..
|
||||
self._overflow_q.appendleft(msg)
|
||||
fmt_msgs = ''
|
||||
for msg in self._overflow_q:
|
||||
fmt_msgs += f'{pformat(msg)}\n'
|
||||
|
||||
log.warning(
|
||||
f'Context for {self.cid} is being closed while '
|
||||
'in an overrun state!\n'
|
||||
'Discarding the following msgs:\n'
|
||||
f'{fmt_msgs}\n'
|
||||
)
|
||||
raise
|
||||
|
||||
finally:
|
||||
# task is now finished with the backlog so mark us as
|
||||
# no longer in backlog.
|
||||
self._in_overrun = False
|
||||
|
||||
async def _deliver_msg(
|
||||
self,
|
||||
msg: dict,
|
||||
|
||||
draining: bool = False,
|
||||
|
||||
) -> bool:
|
||||
|
||||
cid = self.cid
|
||||
chan = self.chan
|
||||
uid = chan.uid
|
||||
send_chan: trio.MemorySendChannel = self._send_chan
|
||||
|
||||
log.runtime(
|
||||
f"Delivering {msg} from {uid} to caller {cid}"
|
||||
)
|
||||
|
||||
error = msg.get('error')
|
||||
if error:
|
||||
await self._maybe_cancel_and_set_remote_error(msg)
|
||||
|
||||
if (
|
||||
self._in_overrun
|
||||
):
|
||||
self._overflow_q.append(msg)
|
||||
return False
|
||||
|
||||
try:
|
||||
send_chan.send_nowait(msg)
|
||||
return True
|
||||
# if an error is deteced we should always
|
||||
# expect it to be raised by any context (stream)
|
||||
# consumer task
|
||||
|
||||
except trio.BrokenResourceError:
|
||||
# TODO: what is the right way to handle the case where the
|
||||
# local task has already sent a 'stop' / StopAsyncInteration
|
||||
# to the other side but and possibly has closed the local
|
||||
# feeder mem chan? Do we wait for some kind of ack or just
|
||||
# let this fail silently and bubble up (currently)?
|
||||
|
||||
# XXX: local consumer has closed their side
|
||||
# so cancel the far end streaming task
|
||||
log.warning(f"{send_chan} consumer is already closed")
|
||||
return False
|
||||
|
||||
# NOTE XXX: by default we do **not** maintain context-stream
|
||||
# backpressure and instead opt to relay stream overrun errors to
|
||||
# the sender; the main motivation is that using bp can block the
|
||||
# msg handling loop which calls into this method!
|
||||
except trio.WouldBlock:
|
||||
# XXX: always push an error even if the local
|
||||
# receiver is in overrun state.
|
||||
# await self._maybe_cancel_and_set_remote_error(msg)
|
||||
|
||||
local_uid = current_actor().uid
|
||||
lines = [
|
||||
f'OVERRUN on actor-task context {cid}@{local_uid}!\n'
|
||||
# TODO: put remote task name here if possible?
|
||||
f'remote sender actor: {uid}',
|
||||
# TODO: put task func name here and maybe an arrow
|
||||
# from sender to overrunner?
|
||||
# f'local task {self.func_name}'
|
||||
]
|
||||
if not self._stream_opened:
|
||||
lines.insert(
|
||||
1,
|
||||
f'\n*** No stream open on `{local_uid[0]}` side! ***\n'
|
||||
)
|
||||
|
||||
text = '\n'.join(lines)
|
||||
|
||||
# XXX: lul, this really can't be backpressure since any
|
||||
# blocking here will block the entire msg loop rpc sched for
|
||||
# a whole channel.. maybe we should rename it?
|
||||
if self._allow_overruns:
|
||||
text += f'\nStarting overflow queuing task on msg: {msg}'
|
||||
log.warning(text)
|
||||
if (
|
||||
not self._in_overrun
|
||||
):
|
||||
self._overflow_q.append(msg)
|
||||
n = self._scope_nursery
|
||||
assert not n.child_tasks
|
||||
try:
|
||||
n.start_soon(
|
||||
self._drain_overflows,
|
||||
)
|
||||
except RuntimeError:
|
||||
# if the nursery is already cancelled due to
|
||||
# this context exiting or in error, we ignore
|
||||
# the nursery error since we never expected
|
||||
# anything different.
|
||||
return False
|
||||
else:
|
||||
try:
|
||||
raise StreamOverrun(text)
|
||||
except StreamOverrun as err:
|
||||
err_msg = pack_error(err)
|
||||
err_msg['cid'] = cid
|
||||
try:
|
||||
await chan.send(err_msg)
|
||||
except trio.BrokenResourceError:
|
||||
# XXX: local consumer has closed their side
|
||||
# so cancel the far end streaming task
|
||||
log.warning(f"{chan} is already closed")
|
||||
|
||||
return False
|
||||
|
||||
|
||||
def mk_context(
|
||||
chan: Channel,
|
||||
cid: str,
|
||||
msg_buffer_size: int = 2**6,
|
||||
|
||||
**kwargs,
|
||||
|
||||
) -> Context:
|
||||
'''
|
||||
Internal factory to create an inter-actor task ``Context``.
|
||||
|
||||
This is called by internals and should generally never be called
|
||||
by user code.
|
||||
|
||||
'''
|
||||
send_chan: trio.MemorySendChannel
|
||||
recv_chan: trio.MemoryReceiveChannel
|
||||
send_chan, recv_chan = trio.open_memory_channel(msg_buffer_size)
|
||||
|
||||
ctx = Context(
|
||||
chan,
|
||||
cid,
|
||||
_send_chan=send_chan,
|
||||
_recv_chan=recv_chan,
|
||||
**kwargs,
|
||||
)
|
||||
ctx._result: int | Any = id(ctx)
|
||||
return ctx
|
||||
|
||||
|
||||
def context(func: Callable) -> Callable:
|
||||
'''
|
||||
Mark an async function as a streaming routine with ``@context``.
|
||||
|
||||
'''
|
||||
# TODO: apply whatever solution ``mypy`` ends up picking for this:
|
||||
# https://github.com/python/mypy/issues/2087#issuecomment-769266912
|
||||
func._tractor_context_function = True # type: ignore
|
||||
|
||||
sig = inspect.signature(func)
|
||||
params = sig.parameters
|
||||
if 'ctx' not in params:
|
||||
raise TypeError(
|
||||
"The first argument to the context function "
|
||||
f"{func.__name__} must be `ctx: tractor.Context`"
|
||||
)
|
||||
return func
|
||||
|
|
@ -30,6 +30,7 @@ from functools import (
|
|||
from contextlib import asynccontextmanager as acm
|
||||
from typing import (
|
||||
Any,
|
||||
Optional,
|
||||
Callable,
|
||||
AsyncIterator,
|
||||
AsyncGenerator,
|
||||
|
|
@ -39,10 +40,7 @@ from types import FrameType
|
|||
import pdbp
|
||||
import tractor
|
||||
import trio
|
||||
from trio_typing import (
|
||||
TaskStatus,
|
||||
# Task,
|
||||
)
|
||||
from trio_typing import TaskStatus
|
||||
|
||||
from .log import get_logger
|
||||
from ._discovery import get_root
|
||||
|
|
@ -71,10 +69,10 @@ class Lock:
|
|||
'''
|
||||
repl: MultiActorPdb | None = None
|
||||
# placeholder for function to set a ``trio.Event`` on debugger exit
|
||||
# pdb_release_hook: Callable | None = None
|
||||
# pdb_release_hook: Optional[Callable] = None
|
||||
|
||||
_trio_handler: Callable[
|
||||
[int, FrameType | None], Any
|
||||
[int, Optional[FrameType]], Any
|
||||
] | int | None = None
|
||||
|
||||
# actor-wide variable pointing to current task name using debugger
|
||||
|
|
@ -85,23 +83,23 @@ class Lock:
|
|||
# and must be cancelled if this actor is cancelled via IPC
|
||||
# request-message otherwise deadlocks with the parent actor may
|
||||
# ensure
|
||||
_debugger_request_cs: trio.CancelScope | None = None
|
||||
_debugger_request_cs: Optional[trio.CancelScope] = None
|
||||
|
||||
# NOTE: set only in the root actor for the **local** root spawned task
|
||||
# which has acquired the lock (i.e. this is on the callee side of
|
||||
# the `lock_tty_for_child()` context entry).
|
||||
_root_local_task_cs_in_debug: trio.CancelScope | None = None
|
||||
_root_local_task_cs_in_debug: Optional[trio.CancelScope] = None
|
||||
|
||||
# actor tree-wide actor uid that supposedly has the tty lock
|
||||
global_actor_in_debug: tuple[str, str] = None
|
||||
global_actor_in_debug: Optional[tuple[str, str]] = None
|
||||
|
||||
local_pdb_complete: trio.Event | None = None
|
||||
no_remote_has_tty: trio.Event | None = None
|
||||
local_pdb_complete: Optional[trio.Event] = None
|
||||
no_remote_has_tty: Optional[trio.Event] = None
|
||||
|
||||
# lock in root actor preventing multi-access to local tty
|
||||
_debug_lock: trio.StrictFIFOLock = trio.StrictFIFOLock()
|
||||
|
||||
_orig_sigint_handler: Callable | None = None
|
||||
_orig_sigint_handler: Optional[Callable] = None
|
||||
_blocked: set[tuple[str, str]] = set()
|
||||
|
||||
@classmethod
|
||||
|
|
@ -112,7 +110,6 @@ class Lock:
|
|||
)
|
||||
|
||||
@classmethod
|
||||
@pdbp.hideframe # XXX NOTE XXX see below in `.pause_from_sync()`
|
||||
def unshield_sigint(cls):
|
||||
# always restore ``trio``'s sigint handler. see notes below in
|
||||
# the pdb factory about the nightmare that is that code swapping
|
||||
|
|
@ -132,6 +129,10 @@ class Lock:
|
|||
if owner:
|
||||
raise
|
||||
|
||||
# actor-local state, irrelevant for non-root.
|
||||
cls.global_actor_in_debug = None
|
||||
cls.local_task_in_debug = None
|
||||
|
||||
try:
|
||||
# sometimes the ``trio`` might already be terminated in
|
||||
# which case this call will raise.
|
||||
|
|
@ -142,11 +143,6 @@ class Lock:
|
|||
cls.unshield_sigint()
|
||||
cls.repl = None
|
||||
|
||||
# actor-local state, irrelevant for non-root.
|
||||
cls.global_actor_in_debug = None
|
||||
cls.local_task_in_debug = None
|
||||
|
||||
|
||||
|
||||
class TractorConfig(pdbp.DefaultConfig):
|
||||
'''
|
||||
|
|
@ -155,7 +151,7 @@ class TractorConfig(pdbp.DefaultConfig):
|
|||
'''
|
||||
use_pygments: bool = True
|
||||
sticky_by_default: bool = False
|
||||
enable_hidden_frames: bool = True
|
||||
enable_hidden_frames: bool = False
|
||||
|
||||
# much thanks @mdmintz for the hot tip!
|
||||
# fixes line spacing issue when resizing terminal B)
|
||||
|
|
@ -232,23 +228,26 @@ async def _acquire_debug_lock_from_root_task(
|
|||
to the ``pdb`` repl.
|
||||
|
||||
'''
|
||||
task_name: str = trio.lowlevel.current_task().name
|
||||
we_acquired: bool = False
|
||||
task_name = trio.lowlevel.current_task().name
|
||||
|
||||
log.runtime(
|
||||
f"Attempting to acquire TTY lock, remote task: {task_name}:{uid}"
|
||||
)
|
||||
|
||||
we_acquired = False
|
||||
|
||||
try:
|
||||
log.runtime(
|
||||
f"entering lock checkpoint, remote task: {task_name}:{uid}"
|
||||
)
|
||||
we_acquired = True
|
||||
|
||||
# NOTE: if the surrounding cancel scope from the
|
||||
# `lock_tty_for_child()` caller is cancelled, this line should
|
||||
# unblock and NOT leave us in some kind of
|
||||
# a "child-locked-TTY-but-child-is-uncontactable-over-IPC"
|
||||
# condition.
|
||||
await Lock._debug_lock.acquire()
|
||||
we_acquired = True
|
||||
|
||||
if Lock.no_remote_has_tty is None:
|
||||
# mark the tty lock as being in use so that the runtime
|
||||
|
|
@ -375,7 +374,7 @@ async def wait_for_parent_stdin_hijack(
|
|||
|
||||
This function is used by any sub-actor to acquire mutex access to
|
||||
the ``pdb`` REPL and thus the root's TTY for interactive debugging
|
||||
(see below inside ``_pause()``). It can be used to ensure that
|
||||
(see below inside ``_breakpoint()``). It can be used to ensure that
|
||||
an intermediate nursery-owning actor does not clobber its children
|
||||
if they are in debug (see below inside
|
||||
``maybe_wait_for_debugger()``).
|
||||
|
|
@ -441,29 +440,17 @@ def mk_mpdb() -> tuple[MultiActorPdb, Callable]:
|
|||
return pdb, Lock.unshield_sigint
|
||||
|
||||
|
||||
async def _pause(
|
||||
async def _breakpoint(
|
||||
|
||||
debug_func: Callable | None = None,
|
||||
release_lock_signal: trio.Event | None = None,
|
||||
debug_func,
|
||||
|
||||
# TODO:
|
||||
# shield: bool = False
|
||||
task_status: TaskStatus[trio.Event] = trio.TASK_STATUS_IGNORED
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
A pause point (more commonly known as a "breakpoint") interrupt
|
||||
instruction for engaging a blocking debugger instance to
|
||||
conduct manual console-based-REPL-interaction from within
|
||||
`tractor`'s async runtime, normally from some single-threaded
|
||||
and currently executing actor-hosted-`trio`-task in some
|
||||
(remote) process.
|
||||
|
||||
NOTE: we use the semantics "pause" since it better encompasses
|
||||
the entirety of the necessary global-runtime-state-mutation any
|
||||
actor-task must access and lock in order to get full isolated
|
||||
control over the process tree's root TTY:
|
||||
https://en.wikipedia.org/wiki/Breakpoint
|
||||
Breakpoint entry for engaging debugger instance sync-interaction,
|
||||
from async code, executing in actor runtime (task).
|
||||
|
||||
'''
|
||||
__tracebackhide__ = True
|
||||
|
|
@ -572,23 +559,10 @@ async def _pause(
|
|||
Lock.repl = pdb
|
||||
|
||||
try:
|
||||
# breakpoint()
|
||||
if debug_func is None:
|
||||
# assert release_lock_signal, (
|
||||
# 'Must pass `release_lock_signal: trio.Event` if no '
|
||||
# 'trace func provided!'
|
||||
# )
|
||||
print(f"{actor.uid} ENTERING WAIT")
|
||||
task_status.started()
|
||||
|
||||
# with trio.CancelScope(shield=True):
|
||||
# await release_lock_signal.wait()
|
||||
|
||||
else:
|
||||
# block here one (at the appropriate frame *up*) where
|
||||
# ``breakpoint()`` was awaited and begin handling stdio.
|
||||
log.debug("Entering the synchronous world of pdb")
|
||||
debug_func(actor, pdb)
|
||||
# block here one (at the appropriate frame *up*) where
|
||||
# ``breakpoint()`` was awaited and begin handling stdio.
|
||||
log.debug("Entering the synchronous world of pdb")
|
||||
debug_func(actor, pdb)
|
||||
|
||||
except bdb.BdbQuit:
|
||||
Lock.release()
|
||||
|
|
@ -609,7 +583,7 @@ async def _pause(
|
|||
def shield_sigint_handler(
|
||||
signum: int,
|
||||
frame: 'frame', # type: ignore # noqa
|
||||
# pdb_obj: MultiActorPdb | None = None,
|
||||
# pdb_obj: Optional[MultiActorPdb] = None,
|
||||
*args,
|
||||
|
||||
) -> None:
|
||||
|
|
@ -623,7 +597,7 @@ def shield_sigint_handler(
|
|||
'''
|
||||
__tracebackhide__ = True
|
||||
|
||||
uid_in_debug: tuple[str, str] | None = Lock.global_actor_in_debug
|
||||
uid_in_debug = Lock.global_actor_in_debug
|
||||
|
||||
actor = tractor.current_actor()
|
||||
# print(f'{actor.uid} in HANDLER with ')
|
||||
|
|
@ -641,14 +615,14 @@ def shield_sigint_handler(
|
|||
else:
|
||||
raise KeyboardInterrupt
|
||||
|
||||
any_connected: bool = False
|
||||
any_connected = False
|
||||
|
||||
if uid_in_debug is not None:
|
||||
# try to see if the supposed (sub)actor in debug still
|
||||
# has an active connection to *this* actor, and if not
|
||||
# it's likely they aren't using the TTY lock / debugger
|
||||
# and we should propagate SIGINT normally.
|
||||
chans: list[tractor.Channel] = actor._peers.get(tuple(uid_in_debug))
|
||||
chans = actor._peers.get(tuple(uid_in_debug))
|
||||
if chans:
|
||||
any_connected = any(chan.connected() for chan in chans)
|
||||
if not any_connected:
|
||||
|
|
@ -661,7 +635,7 @@ def shield_sigint_handler(
|
|||
return do_cancel()
|
||||
|
||||
# only set in the actor actually running the REPL
|
||||
pdb_obj: MultiActorPdb | None = Lock.repl
|
||||
pdb_obj = Lock.repl
|
||||
|
||||
# root actor branch that reports whether or not a child
|
||||
# has locked debugger.
|
||||
|
|
@ -719,7 +693,7 @@ def shield_sigint_handler(
|
|||
)
|
||||
return do_cancel()
|
||||
|
||||
task: str | None = Lock.local_task_in_debug
|
||||
task = Lock.local_task_in_debug
|
||||
if (
|
||||
task
|
||||
and pdb_obj
|
||||
|
|
@ -734,8 +708,8 @@ def shield_sigint_handler(
|
|||
# elif debug_mode():
|
||||
|
||||
else: # XXX: shouldn't ever get here?
|
||||
raise RuntimeError("WTFWTFWTF")
|
||||
# raise KeyboardInterrupt("WTFWTFWTF")
|
||||
print("WTFWTFWTF")
|
||||
raise KeyboardInterrupt
|
||||
|
||||
# NOTE: currently (at least on ``fancycompleter`` 0.9.2)
|
||||
# it looks to be that the last command that was run (eg. ll)
|
||||
|
|
@ -763,18 +737,21 @@ def shield_sigint_handler(
|
|||
# https://github.com/goodboy/tractor/issues/130#issuecomment-663752040
|
||||
# https://github.com/prompt-toolkit/python-prompt-toolkit/blob/c2c6af8a0308f9e5d7c0e28cb8a02963fe0ce07a/prompt_toolkit/patch_stdout.py
|
||||
|
||||
# XXX LEGACY: lol, see ``pdbpp`` issue:
|
||||
# https://github.com/pdbpp/pdbpp/issues/496
|
||||
|
||||
|
||||
def _set_trace(
|
||||
actor: tractor.Actor | None = None,
|
||||
pdb: MultiActorPdb | None = None,
|
||||
):
|
||||
__tracebackhide__ = True
|
||||
actor: tractor.Actor = actor or tractor.current_actor()
|
||||
actor = actor or tractor.current_actor()
|
||||
|
||||
# start 2 levels up in user code
|
||||
frame: FrameType | None = sys._getframe()
|
||||
frame: Optional[FrameType] = sys._getframe()
|
||||
if frame:
|
||||
frame: FrameType = frame.f_back # type: ignore
|
||||
frame = frame.f_back # type: ignore
|
||||
|
||||
if (
|
||||
frame
|
||||
|
|
@ -794,76 +771,12 @@ def _set_trace(
|
|||
Lock.local_task_in_debug = 'sync'
|
||||
|
||||
pdb.set_trace(frame=frame)
|
||||
# undo_
|
||||
|
||||
|
||||
# TODO: allow pausing from sync code, normally by remapping
|
||||
# python's builtin breakpoint() hook to this runtime aware version.
|
||||
def pause_from_sync() -> None:
|
||||
print("ENTER SYNC PAUSE")
|
||||
import greenback
|
||||
__tracebackhide__ = True
|
||||
|
||||
actor: tractor.Actor = tractor.current_actor()
|
||||
# task_can_release_tty_lock = trio.Event()
|
||||
|
||||
# spawn bg task which will lock out the TTY, we poll
|
||||
# just below until the release event is reporting that task as
|
||||
# waiting.. not the most ideal but works for now ;)
|
||||
greenback.await_(
|
||||
actor._service_n.start(partial(
|
||||
_pause,
|
||||
debug_func=None,
|
||||
# release_lock_signal=task_can_release_tty_lock,
|
||||
))
|
||||
)
|
||||
|
||||
db, undo_sigint = mk_mpdb()
|
||||
Lock.local_task_in_debug = 'sync'
|
||||
# db.config.enable_hidden_frames = True
|
||||
|
||||
# we entered the global ``breakpoint()`` built-in from sync
|
||||
# code?
|
||||
frame: FrameType | None = sys._getframe()
|
||||
# print(f'FRAME: {str(frame)}')
|
||||
# assert not db._is_hidden(frame)
|
||||
|
||||
frame: FrameType = frame.f_back # type: ignore
|
||||
# print(f'FRAME: {str(frame)}')
|
||||
# if not db._is_hidden(frame):
|
||||
# pdbp.set_trace()
|
||||
# db._hidden_frames.append(
|
||||
# (frame, frame.f_lineno)
|
||||
# )
|
||||
db.set_trace(frame=frame)
|
||||
# NOTE XXX: see the `@pdbp.hideframe` decoration
|
||||
# on `Lock.unshield_sigint()`.. I have NO CLUE why
|
||||
# the next instruction's def frame is being shown
|
||||
# in the tb but it seems to be something wonky with
|
||||
# the way `pdb` core works?
|
||||
# undo_sigint()
|
||||
|
||||
# Lock.global_actor_in_debug = actor.uid
|
||||
# Lock.release()
|
||||
# task_can_release_tty_lock.set()
|
||||
|
||||
|
||||
# using the "pause" semantics instead since
|
||||
# that better covers actually somewhat "pausing the runtime"
|
||||
# for this particular paralell task to do debugging B)
|
||||
pause = partial(
|
||||
_pause,
|
||||
breakpoint = partial(
|
||||
_breakpoint,
|
||||
_set_trace,
|
||||
)
|
||||
pp = pause # short-hand for "pause point"
|
||||
|
||||
|
||||
async def breakpoint(**kwargs):
|
||||
log.warning(
|
||||
'`tractor.breakpoint()` is deprecated!\n'
|
||||
'Please use `tractor.pause()` instead!\n'
|
||||
)
|
||||
await pause(**kwargs)
|
||||
|
||||
|
||||
def _post_mortem(
|
||||
|
|
@ -888,7 +801,7 @@ def _post_mortem(
|
|||
|
||||
|
||||
post_mortem = partial(
|
||||
_pause,
|
||||
_breakpoint,
|
||||
_post_mortem,
|
||||
)
|
||||
|
||||
|
|
@ -970,7 +883,8 @@ async def maybe_wait_for_debugger(
|
|||
# will make the pdb repl unusable.
|
||||
# Instead try to wait for pdb to be released before
|
||||
# tearing down.
|
||||
sub_in_debug: tuple[str, str] | None = None
|
||||
|
||||
sub_in_debug = None
|
||||
|
||||
for _ in range(poll_steps):
|
||||
|
||||
|
|
@ -990,15 +904,13 @@ async def maybe_wait_for_debugger(
|
|||
|
||||
debug_complete = Lock.no_remote_has_tty
|
||||
if (
|
||||
debug_complete
|
||||
and sub_in_debug is not None
|
||||
and not debug_complete.is_set()
|
||||
(debug_complete and
|
||||
not debug_complete.is_set())
|
||||
):
|
||||
log.pdb(
|
||||
log.debug(
|
||||
'Root has errored but pdb is in use by '
|
||||
f'child {sub_in_debug}\n'
|
||||
'Waiting on tty lock to release..'
|
||||
)
|
||||
'Waiting on tty lock to release..')
|
||||
|
||||
await debug_complete.wait()
|
||||
|
||||
|
|
|
|||
|
|
@ -41,10 +41,8 @@ async def get_arbiter(
|
|||
port: int,
|
||||
|
||||
) -> AsyncGenerator[Union[Portal, LocalPortal], None]:
|
||||
'''
|
||||
Return a portal instance connected to a local or remote
|
||||
'''Return a portal instance connected to a local or remote
|
||||
arbiter.
|
||||
|
||||
'''
|
||||
actor = current_actor()
|
||||
|
||||
|
|
@ -136,16 +134,12 @@ async def find_actor(
|
|||
@acm
|
||||
async def wait_for_actor(
|
||||
name: str,
|
||||
arbiter_sockaddr: tuple[str, int] | None = None,
|
||||
# registry_addr: tuple[str, int] | None = None,
|
||||
|
||||
arbiter_sockaddr: tuple[str, int] | None = None
|
||||
) -> AsyncGenerator[Portal, None]:
|
||||
'''
|
||||
Wait on an actor to register with the arbiter.
|
||||
"""Wait on an actor to register with the arbiter.
|
||||
|
||||
A portal to the first registered actor is returned.
|
||||
|
||||
'''
|
||||
"""
|
||||
actor = current_actor()
|
||||
|
||||
async with get_arbiter(
|
||||
|
|
|
|||
|
|
@ -132,7 +132,7 @@ def _trio_main(
|
|||
else:
|
||||
trio.run(trio_main)
|
||||
except KeyboardInterrupt:
|
||||
log.cancel(f"Actor {actor.uid} received KBI")
|
||||
log.warning(f"Actor {actor.uid} received KBI")
|
||||
|
||||
finally:
|
||||
log.info(f"Actor {actor.uid} terminated")
|
||||
|
|
|
|||
|
|
@ -18,18 +18,18 @@
|
|||
Our classy exception set.
|
||||
|
||||
"""
|
||||
import builtins
|
||||
import importlib
|
||||
from typing import (
|
||||
Any,
|
||||
Optional,
|
||||
Type,
|
||||
)
|
||||
import importlib
|
||||
import builtins
|
||||
import traceback
|
||||
|
||||
import exceptiongroup as eg
|
||||
import trio
|
||||
|
||||
from ._state import current_actor
|
||||
|
||||
_this_mod = importlib.import_module(__name__)
|
||||
|
||||
|
|
@ -44,7 +44,7 @@ class RemoteActorError(Exception):
|
|||
def __init__(
|
||||
self,
|
||||
message: str,
|
||||
suberror_type: Type[BaseException] | None = None,
|
||||
suberror_type: Optional[Type[BaseException]] = None,
|
||||
**msgdata
|
||||
|
||||
) -> None:
|
||||
|
|
@ -53,36 +53,21 @@ class RemoteActorError(Exception):
|
|||
self.type = suberror_type
|
||||
self.msgdata = msgdata
|
||||
|
||||
@property
|
||||
def src_actor_uid(self) -> tuple[str, str] | None:
|
||||
return self.msgdata.get('src_actor_uid')
|
||||
|
||||
|
||||
class InternalActorError(RemoteActorError):
|
||||
'''
|
||||
Remote internal ``tractor`` error indicating
|
||||
"""Remote internal ``tractor`` error indicating
|
||||
failure of some primitive or machinery.
|
||||
|
||||
'''
|
||||
|
||||
|
||||
class ContextCancelled(RemoteActorError):
|
||||
'''
|
||||
Inter-actor task context was cancelled by either a call to
|
||||
``Portal.cancel_actor()`` or ``Context.cancel()``.
|
||||
|
||||
'''
|
||||
@property
|
||||
def canceller(self) -> tuple[str, str] | None:
|
||||
value = self.msgdata.get('canceller')
|
||||
if value:
|
||||
return tuple(value)
|
||||
"""
|
||||
|
||||
|
||||
class TransportClosed(trio.ClosedResourceError):
|
||||
"Underlying channel transport was closed prior to use"
|
||||
|
||||
|
||||
class ContextCancelled(RemoteActorError):
|
||||
"Inter-actor task context cancelled itself on the callee side."
|
||||
|
||||
|
||||
class NoResult(RuntimeError):
|
||||
"No final result is expected for this actor"
|
||||
|
||||
|
|
@ -121,17 +106,13 @@ def pack_error(
|
|||
else:
|
||||
tb_str = traceback.format_exc()
|
||||
|
||||
error_msg = {
|
||||
'tb_str': tb_str,
|
||||
'type_str': type(exc).__name__,
|
||||
'src_actor_uid': current_actor().uid,
|
||||
return {
|
||||
'error': {
|
||||
'tb_str': tb_str,
|
||||
'type_str': type(exc).__name__,
|
||||
}
|
||||
}
|
||||
|
||||
if isinstance(exc, ContextCancelled):
|
||||
error_msg.update(exc.msgdata)
|
||||
|
||||
return {'error': error_msg}
|
||||
|
||||
|
||||
def unpack_error(
|
||||
|
||||
|
|
@ -155,7 +136,7 @@ def unpack_error(
|
|||
|
||||
if type_name == 'ContextCancelled':
|
||||
err_type = ContextCancelled
|
||||
suberror_type = RemoteActorError
|
||||
suberror_type = trio.Cancelled
|
||||
|
||||
else: # try to lookup a suitable local error type
|
||||
for ns in [
|
||||
|
|
|
|||
|
|
@ -45,8 +45,10 @@ from ._exceptions import (
|
|||
NoResult,
|
||||
ContextCancelled,
|
||||
)
|
||||
from ._context import Context
|
||||
from ._streaming import MsgStream
|
||||
from ._streaming import (
|
||||
Context,
|
||||
MsgStream,
|
||||
)
|
||||
|
||||
|
||||
log = get_logger(__name__)
|
||||
|
|
@ -101,7 +103,7 @@ class Portal:
|
|||
# When set to a ``Context`` (when _submit_for_result is called)
|
||||
# it is expected that ``result()`` will be awaited at some
|
||||
# point.
|
||||
self._expect_result: Context | None = None
|
||||
self._expect_result: Optional[Context] = None
|
||||
self._streams: set[MsgStream] = set()
|
||||
self.actor = current_actor()
|
||||
|
||||
|
|
@ -207,10 +209,7 @@ class Portal:
|
|||
try:
|
||||
# send cancel cmd - might not get response
|
||||
# XXX: sure would be nice to make this work with a proper shield
|
||||
with trio.move_on_after(
|
||||
timeout
|
||||
or self.cancel_timeout
|
||||
) as cs:
|
||||
with trio.move_on_after(timeout or self.cancel_timeout) as cs:
|
||||
cs.shield = True
|
||||
|
||||
await self.run_from_ns('self', 'cancel')
|
||||
|
|
@ -331,9 +330,7 @@ class Portal:
|
|||
f'{async_gen_func} must be an async generator function!')
|
||||
|
||||
fn_mod_path, fn_name = NamespacePath.from_ref(
|
||||
async_gen_func
|
||||
).to_tuple()
|
||||
|
||||
async_gen_func).to_tuple()
|
||||
ctx = await self.actor.start_remote_task(
|
||||
self.channel,
|
||||
fn_mod_path,
|
||||
|
|
@ -380,7 +377,6 @@ class Portal:
|
|||
|
||||
self,
|
||||
func: Callable,
|
||||
allow_overruns: bool = False,
|
||||
**kwargs,
|
||||
|
||||
) -> AsyncGenerator[tuple[Context, Any], None]:
|
||||
|
|
@ -400,26 +396,13 @@ class Portal:
|
|||
raise TypeError(
|
||||
f'{func} must be an async generator function!')
|
||||
|
||||
# TODO: i think from here onward should probably
|
||||
# just be factored into an `@acm` inside a new
|
||||
# a new `_context.py` mod.
|
||||
fn_mod_path, fn_name = NamespacePath.from_ref(func).to_tuple()
|
||||
|
||||
ctx = await self.actor.start_remote_task(
|
||||
self.channel,
|
||||
fn_mod_path,
|
||||
fn_name,
|
||||
kwargs,
|
||||
|
||||
# NOTE: it's imporant to expose this since you might
|
||||
# get the case where the parent who opened the context does
|
||||
# not open a stream until after some slow startup/init
|
||||
# period, in which case when the first msg is read from
|
||||
# the feeder mem chan, say when first calling
|
||||
# `Context.open_stream(allow_overruns=True)`, the overrun condition will be
|
||||
# raised before any ignoring of overflow msgs can take
|
||||
# place..
|
||||
allow_overruns=allow_overruns,
|
||||
kwargs
|
||||
)
|
||||
|
||||
assert ctx._remote_func_type == 'context'
|
||||
|
|
@ -443,47 +426,29 @@ class Portal:
|
|||
f' but received a non-error msg:\n{pformat(msg)}'
|
||||
)
|
||||
|
||||
_err: BaseException | None = None
|
||||
ctx._portal: Portal = self
|
||||
_err: Optional[BaseException] = None
|
||||
ctx._portal = self
|
||||
|
||||
uid: tuple = self.channel.uid
|
||||
cid: str = ctx.cid
|
||||
etype: Type[BaseException] | None = None
|
||||
uid = self.channel.uid
|
||||
cid = ctx.cid
|
||||
etype: Optional[Type[BaseException]] = None
|
||||
|
||||
# deliver context instance and .started() msg value in enter
|
||||
# tuple.
|
||||
# deliver context instance and .started() msg value in open tuple.
|
||||
try:
|
||||
async with trio.open_nursery() as nurse:
|
||||
ctx._scope_nursery = nurse
|
||||
ctx._scope = nurse.cancel_scope
|
||||
async with trio.open_nursery() as scope_nursery:
|
||||
ctx._scope_nursery = scope_nursery
|
||||
|
||||
# do we need this?
|
||||
# await trio.lowlevel.checkpoint()
|
||||
|
||||
yield ctx, first
|
||||
|
||||
# when in allow_ovveruns mode there may be lingering
|
||||
# overflow sender tasks remaining?
|
||||
if nurse.child_tasks:
|
||||
# ensure we are in overrun state with
|
||||
# ``._allow_overruns=True`` bc otherwise
|
||||
# there should be no tasks in this nursery!
|
||||
if (
|
||||
not ctx._allow_overruns
|
||||
or len(nurse.child_tasks) > 1
|
||||
):
|
||||
raise RuntimeError(
|
||||
'Context has sub-tasks but is '
|
||||
'not in `allow_overruns=True` Mode!?'
|
||||
)
|
||||
ctx._scope.cancel()
|
||||
|
||||
except ContextCancelled as err:
|
||||
_err = err
|
||||
|
||||
# swallow and mask cross-actor task context cancels that
|
||||
# were initiated by *this* side's task.
|
||||
if not ctx._cancel_called:
|
||||
# XXX: this should NEVER happen!
|
||||
# from ._debug import breakpoint
|
||||
# await breakpoint()
|
||||
# context was cancelled at the far end but was
|
||||
# not part of this end requesting that cancel
|
||||
# so raise for the local task to respond and handle.
|
||||
raise
|
||||
|
||||
# if the context was cancelled by client code
|
||||
|
|
@ -503,17 +468,17 @@ class Portal:
|
|||
|
||||
) as err:
|
||||
etype = type(err)
|
||||
# the context cancels itself on any cancel
|
||||
# causing error.
|
||||
|
||||
# cancel ourselves on any error.
|
||||
log.cancel(
|
||||
'Context cancelled for task, sending cancel request..\n'
|
||||
f'task:{cid}\n'
|
||||
f'actor:{uid}'
|
||||
)
|
||||
try:
|
||||
|
||||
if ctx.chan.connected():
|
||||
log.cancel(
|
||||
'Context cancelled for task, sending cancel request..\n'
|
||||
f'task:{cid}\n'
|
||||
f'actor:{uid}'
|
||||
)
|
||||
await ctx.cancel()
|
||||
except trio.BrokenResourceError:
|
||||
else:
|
||||
log.warning(
|
||||
'IPC connection for context is broken?\n'
|
||||
f'task:{cid}\n'
|
||||
|
|
@ -522,7 +487,12 @@ class Portal:
|
|||
|
||||
raise
|
||||
|
||||
else:
|
||||
finally:
|
||||
# in the case where a runtime nursery (due to internal bug)
|
||||
# or a remote actor transmits an error we want to be
|
||||
# sure we get the error the underlying feeder mem chan.
|
||||
# if it's not raised here it *should* be raised from the
|
||||
# msg loop nursery right?
|
||||
if ctx.chan.connected():
|
||||
log.info(
|
||||
'Waiting on final context-task result for\n'
|
||||
|
|
@ -535,7 +505,6 @@ class Portal:
|
|||
f'value from callee `{result}`'
|
||||
)
|
||||
|
||||
finally:
|
||||
# though it should be impossible for any tasks
|
||||
# operating *in* this scope to have survived
|
||||
# we tear down the runtime feeder chan last
|
||||
|
|
|
|||
|
|
@ -89,7 +89,7 @@ async def open_root_actor(
|
|||
# https://github.com/python-trio/trio/issues/1155#issuecomment-742964018
|
||||
builtin_bp_handler = sys.breakpointhook
|
||||
orig_bp_path: str | None = os.environ.get('PYTHONBREAKPOINT', None)
|
||||
os.environ['PYTHONBREAKPOINT'] = 'tractor._debug.pause_from_sync'
|
||||
os.environ['PYTHONBREAKPOINT'] = 'tractor._debug._set_trace'
|
||||
|
||||
# attempt to retreive ``trio``'s sigint handler and stash it
|
||||
# on our debugger lock state.
|
||||
|
|
@ -235,10 +235,9 @@ async def open_root_actor(
|
|||
BaseExceptionGroup,
|
||||
) as err:
|
||||
|
||||
if (
|
||||
not (await _debug._maybe_enter_pm(err))
|
||||
and not is_multi_cancelled(err)
|
||||
):
|
||||
entered = await _debug._maybe_enter_pm(err)
|
||||
|
||||
if not entered and not is_multi_cancelled(err):
|
||||
logger.exception("Root actor crashed:")
|
||||
|
||||
# always re-raise
|
||||
|
|
@ -255,9 +254,7 @@ async def open_root_actor(
|
|||
# tempn.start_soon(an.exited.wait)
|
||||
|
||||
logger.cancel("Shutting down root actor")
|
||||
await actor.cancel(
|
||||
requesting_uid=actor.uid,
|
||||
)
|
||||
await actor.cancel()
|
||||
finally:
|
||||
_state._current_actor = None
|
||||
|
||||
|
|
|
|||
File diff suppressed because it is too large
Load Diff
833
tractor/_shm.py
833
tractor/_shm.py
|
|
@ -1,833 +0,0 @@
|
|||
# tractor: structured concurrent "actors".
|
||||
# Copyright 2018-eternity Tyler Goodlet.
|
||||
|
||||
# This program is free software: you can redistribute it and/or modify
|
||||
# it under the terms of the GNU Affero General Public License as published by
|
||||
# the Free Software Foundation, either version 3 of the License, or
|
||||
# (at your option) any later version.
|
||||
|
||||
# This program is distributed in the hope that it will be useful,
|
||||
# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
# GNU Affero General Public License for more details.
|
||||
|
||||
# You should have received a copy of the GNU Affero General Public License
|
||||
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
"""
|
||||
SC friendly shared memory management geared at real-time
|
||||
processing.
|
||||
|
||||
Support for ``numpy`` compatible array-buffers is provided but is
|
||||
considered optional within the context of this runtime-library.
|
||||
|
||||
"""
|
||||
from __future__ import annotations
|
||||
from sys import byteorder
|
||||
import time
|
||||
from typing import Optional
|
||||
from multiprocessing import shared_memory as shm
|
||||
from multiprocessing.shared_memory import (
|
||||
SharedMemory,
|
||||
ShareableList,
|
||||
)
|
||||
|
||||
from msgspec import Struct
|
||||
import tractor
|
||||
|
||||
from .log import get_logger
|
||||
|
||||
|
||||
_USE_POSIX = getattr(shm, '_USE_POSIX', False)
|
||||
if _USE_POSIX:
|
||||
from _posixshmem import shm_unlink
|
||||
|
||||
|
||||
try:
|
||||
import numpy as np
|
||||
from numpy.lib import recfunctions as rfn
|
||||
import nptyping
|
||||
except ImportError:
|
||||
pass
|
||||
|
||||
|
||||
log = get_logger(__name__)
|
||||
|
||||
|
||||
def disable_mantracker():
|
||||
'''
|
||||
Disable all ``multiprocessing``` "resource tracking" machinery since
|
||||
it's an absolute multi-threaded mess of non-SC madness.
|
||||
|
||||
'''
|
||||
from multiprocessing import resource_tracker as mantracker
|
||||
|
||||
# Tell the "resource tracker" thing to fuck off.
|
||||
class ManTracker(mantracker.ResourceTracker):
|
||||
def register(self, name, rtype):
|
||||
pass
|
||||
|
||||
def unregister(self, name, rtype):
|
||||
pass
|
||||
|
||||
def ensure_running(self):
|
||||
pass
|
||||
|
||||
# "know your land and know your prey"
|
||||
# https://www.dailymotion.com/video/x6ozzco
|
||||
mantracker._resource_tracker = ManTracker()
|
||||
mantracker.register = mantracker._resource_tracker.register
|
||||
mantracker.ensure_running = mantracker._resource_tracker.ensure_running
|
||||
mantracker.unregister = mantracker._resource_tracker.unregister
|
||||
mantracker.getfd = mantracker._resource_tracker.getfd
|
||||
|
||||
|
||||
disable_mantracker()
|
||||
|
||||
|
||||
class SharedInt:
|
||||
'''
|
||||
Wrapper around a single entry shared memory array which
|
||||
holds an ``int`` value used as an index counter.
|
||||
|
||||
'''
|
||||
def __init__(
|
||||
self,
|
||||
shm: SharedMemory,
|
||||
) -> None:
|
||||
self._shm = shm
|
||||
|
||||
@property
|
||||
def value(self) -> int:
|
||||
return int.from_bytes(self._shm.buf, byteorder)
|
||||
|
||||
@value.setter
|
||||
def value(self, value) -> None:
|
||||
self._shm.buf[:] = value.to_bytes(self._shm.size, byteorder)
|
||||
|
||||
def destroy(self) -> None:
|
||||
if _USE_POSIX:
|
||||
# We manually unlink to bypass all the "resource tracker"
|
||||
# nonsense meant for non-SC systems.
|
||||
name = self._shm.name
|
||||
try:
|
||||
shm_unlink(name)
|
||||
except FileNotFoundError:
|
||||
# might be a teardown race here?
|
||||
log.warning(f'Shm for {name} already unlinked?')
|
||||
|
||||
|
||||
class NDToken(Struct, frozen=True):
|
||||
'''
|
||||
Internal represenation of a shared memory ``numpy`` array "token"
|
||||
which can be used to key and load a system (OS) wide shm entry
|
||||
and correctly read the array by type signature.
|
||||
|
||||
This type is msg safe.
|
||||
|
||||
'''
|
||||
shm_name: str # this servers as a "key" value
|
||||
shm_first_index_name: str
|
||||
shm_last_index_name: str
|
||||
dtype_descr: tuple
|
||||
size: int # in struct-array index / row terms
|
||||
|
||||
# TODO: use nptyping here on dtypes
|
||||
@property
|
||||
def dtype(self) -> list[tuple[str, str, tuple[int, ...]]]:
|
||||
return np.dtype(
|
||||
list(
|
||||
map(tuple, self.dtype_descr)
|
||||
)
|
||||
).descr
|
||||
|
||||
def as_msg(self):
|
||||
return self.to_dict()
|
||||
|
||||
@classmethod
|
||||
def from_msg(cls, msg: dict) -> NDToken:
|
||||
if isinstance(msg, NDToken):
|
||||
return msg
|
||||
|
||||
# TODO: native struct decoding
|
||||
# return _token_dec.decode(msg)
|
||||
|
||||
msg['dtype_descr'] = tuple(map(tuple, msg['dtype_descr']))
|
||||
return NDToken(**msg)
|
||||
|
||||
|
||||
# _token_dec = msgspec.msgpack.Decoder(NDToken)
|
||||
|
||||
# TODO: this api?
|
||||
# _known_tokens = tractor.ActorVar('_shm_tokens', {})
|
||||
# _known_tokens = tractor.ContextStack('_known_tokens', )
|
||||
# _known_tokens = trio.RunVar('shms', {})
|
||||
|
||||
# TODO: this should maybe be provided via
|
||||
# a `.trionics.maybe_open_context()` wrapper factory?
|
||||
# process-local store of keys to tokens
|
||||
_known_tokens: dict[str, NDToken] = {}
|
||||
|
||||
|
||||
def get_shm_token(key: str) -> NDToken | None:
|
||||
'''
|
||||
Convenience func to check if a token
|
||||
for the provided key is known by this process.
|
||||
|
||||
Returns either the ``numpy`` token or a string for a shared list.
|
||||
|
||||
'''
|
||||
return _known_tokens.get(key)
|
||||
|
||||
|
||||
def _make_token(
|
||||
key: str,
|
||||
size: int,
|
||||
dtype: np.dtype,
|
||||
|
||||
) -> NDToken:
|
||||
'''
|
||||
Create a serializable token that can be used
|
||||
to access a shared array.
|
||||
|
||||
'''
|
||||
return NDToken(
|
||||
shm_name=key,
|
||||
shm_first_index_name=key + "_first",
|
||||
shm_last_index_name=key + "_last",
|
||||
dtype_descr=tuple(np.dtype(dtype).descr),
|
||||
size=size,
|
||||
)
|
||||
|
||||
|
||||
class ShmArray:
|
||||
'''
|
||||
A shared memory ``numpy.ndarray`` API.
|
||||
|
||||
An underlying shared memory buffer is allocated based on
|
||||
a user specified ``numpy.ndarray``. This fixed size array
|
||||
can be read and written to by pushing data both onto the "front"
|
||||
or "back" of a set index range. The indexes for the "first" and
|
||||
"last" index are themselves stored in shared memory (accessed via
|
||||
``SharedInt`` interfaces) values such that multiple processes can
|
||||
interact with the same array using a synchronized-index.
|
||||
|
||||
'''
|
||||
def __init__(
|
||||
self,
|
||||
shmarr: np.ndarray,
|
||||
first: SharedInt,
|
||||
last: SharedInt,
|
||||
shm: SharedMemory,
|
||||
# readonly: bool = True,
|
||||
) -> None:
|
||||
self._array = shmarr
|
||||
|
||||
# indexes for first and last indices corresponding
|
||||
# to fille data
|
||||
self._first = first
|
||||
self._last = last
|
||||
|
||||
self._len = len(shmarr)
|
||||
self._shm = shm
|
||||
self._post_init: bool = False
|
||||
|
||||
# pushing data does not write the index (aka primary key)
|
||||
self._write_fields: list[str] | None = None
|
||||
dtype = shmarr.dtype
|
||||
if dtype.fields:
|
||||
self._write_fields = list(shmarr.dtype.fields.keys())[1:]
|
||||
|
||||
# TODO: ringbuf api?
|
||||
|
||||
@property
|
||||
def _token(self) -> NDToken:
|
||||
return NDToken(
|
||||
shm_name=self._shm.name,
|
||||
shm_first_index_name=self._first._shm.name,
|
||||
shm_last_index_name=self._last._shm.name,
|
||||
dtype_descr=tuple(self._array.dtype.descr),
|
||||
size=self._len,
|
||||
)
|
||||
|
||||
@property
|
||||
def token(self) -> dict:
|
||||
"""Shared memory token that can be serialized and used by
|
||||
another process to attach to this array.
|
||||
"""
|
||||
return self._token.as_msg()
|
||||
|
||||
@property
|
||||
def index(self) -> int:
|
||||
return self._last.value % self._len
|
||||
|
||||
@property
|
||||
def array(self) -> np.ndarray:
|
||||
'''
|
||||
Return an up-to-date ``np.ndarray`` view of the
|
||||
so-far-written data to the underlying shm buffer.
|
||||
|
||||
'''
|
||||
a = self._array[self._first.value:self._last.value]
|
||||
|
||||
# first, last = self._first.value, self._last.value
|
||||
# a = self._array[first:last]
|
||||
|
||||
# TODO: eventually comment this once we've not seen it in the
|
||||
# wild in a long time..
|
||||
# XXX: race where first/last indexes cause a reader
|
||||
# to load an empty array..
|
||||
if len(a) == 0 and self._post_init:
|
||||
raise RuntimeError('Empty array race condition hit!?')
|
||||
# breakpoint()
|
||||
|
||||
return a
|
||||
|
||||
def ustruct(
|
||||
self,
|
||||
fields: Optional[list[str]] = None,
|
||||
|
||||
# type that all field values will be cast to
|
||||
# in the returned view.
|
||||
common_dtype: np.dtype = float,
|
||||
|
||||
) -> np.ndarray:
|
||||
|
||||
array = self._array
|
||||
|
||||
if fields:
|
||||
selection = array[fields]
|
||||
# fcount = len(fields)
|
||||
else:
|
||||
selection = array
|
||||
# fcount = len(array.dtype.fields)
|
||||
|
||||
# XXX: manual ``.view()`` attempt that also doesn't work.
|
||||
# uview = selection.view(
|
||||
# dtype='<f16',
|
||||
# ).reshape(-1, 4, order='A')
|
||||
|
||||
# assert len(selection) == len(uview)
|
||||
|
||||
u = rfn.structured_to_unstructured(
|
||||
selection,
|
||||
# dtype=float,
|
||||
copy=True,
|
||||
)
|
||||
|
||||
# unstruct = np.ndarray(u.shape, dtype=a.dtype, buffer=shm.buf)
|
||||
# array[:] = a[:]
|
||||
return u
|
||||
# return ShmArray(
|
||||
# shmarr=u,
|
||||
# first=self._first,
|
||||
# last=self._last,
|
||||
# shm=self._shm
|
||||
# )
|
||||
|
||||
def last(
|
||||
self,
|
||||
length: int = 1,
|
||||
|
||||
) -> np.ndarray:
|
||||
'''
|
||||
Return the last ``length``'s worth of ("row") entries from the
|
||||
array.
|
||||
|
||||
'''
|
||||
return self.array[-length:]
|
||||
|
||||
def push(
|
||||
self,
|
||||
data: np.ndarray,
|
||||
|
||||
field_map: Optional[dict[str, str]] = None,
|
||||
prepend: bool = False,
|
||||
update_first: bool = True,
|
||||
start: int | None = None,
|
||||
|
||||
) -> int:
|
||||
'''
|
||||
Ring buffer like "push" to append data
|
||||
into the buffer and return updated "last" index.
|
||||
|
||||
NB: no actual ring logic yet to give a "loop around" on overflow
|
||||
condition, lel.
|
||||
|
||||
'''
|
||||
length = len(data)
|
||||
|
||||
if prepend:
|
||||
index = (start or self._first.value) - length
|
||||
|
||||
if index < 0:
|
||||
raise ValueError(
|
||||
f'Array size of {self._len} was overrun during prepend.\n'
|
||||
f'You have passed {abs(index)} too many datums.'
|
||||
)
|
||||
|
||||
else:
|
||||
index = start if start is not None else self._last.value
|
||||
|
||||
end = index + length
|
||||
|
||||
if field_map:
|
||||
src_names, dst_names = zip(*field_map.items())
|
||||
else:
|
||||
dst_names = src_names = self._write_fields
|
||||
|
||||
try:
|
||||
self._array[
|
||||
list(dst_names)
|
||||
][index:end] = data[list(src_names)][:]
|
||||
|
||||
# NOTE: there was a race here between updating
|
||||
# the first and last indices and when the next reader
|
||||
# tries to access ``.array`` (which due to the index
|
||||
# overlap will be empty). Pretty sure we've fixed it now
|
||||
# but leaving this here as a reminder.
|
||||
if (
|
||||
prepend
|
||||
and update_first
|
||||
and length
|
||||
):
|
||||
assert index < self._first.value
|
||||
|
||||
if (
|
||||
index < self._first.value
|
||||
and update_first
|
||||
):
|
||||
assert prepend, 'prepend=True not passed but index decreased?'
|
||||
self._first.value = index
|
||||
|
||||
elif not prepend:
|
||||
self._last.value = end
|
||||
|
||||
self._post_init = True
|
||||
return end
|
||||
|
||||
except ValueError as err:
|
||||
if field_map:
|
||||
raise
|
||||
|
||||
# should raise if diff detected
|
||||
self.diff_err_fields(data)
|
||||
raise err
|
||||
|
||||
def diff_err_fields(
|
||||
self,
|
||||
data: np.ndarray,
|
||||
) -> None:
|
||||
# reraise with any field discrepancy
|
||||
our_fields, their_fields = (
|
||||
set(self._array.dtype.fields),
|
||||
set(data.dtype.fields),
|
||||
)
|
||||
|
||||
only_in_ours = our_fields - their_fields
|
||||
only_in_theirs = their_fields - our_fields
|
||||
|
||||
if only_in_ours:
|
||||
raise TypeError(
|
||||
f"Input array is missing field(s): {only_in_ours}"
|
||||
)
|
||||
elif only_in_theirs:
|
||||
raise TypeError(
|
||||
f"Input array has unknown field(s): {only_in_theirs}"
|
||||
)
|
||||
|
||||
# TODO: support "silent" prepends that don't update ._first.value?
|
||||
def prepend(
|
||||
self,
|
||||
data: np.ndarray,
|
||||
) -> int:
|
||||
end = self.push(data, prepend=True)
|
||||
assert end
|
||||
|
||||
def close(self) -> None:
|
||||
self._first._shm.close()
|
||||
self._last._shm.close()
|
||||
self._shm.close()
|
||||
|
||||
def destroy(self) -> None:
|
||||
if _USE_POSIX:
|
||||
# We manually unlink to bypass all the "resource tracker"
|
||||
# nonsense meant for non-SC systems.
|
||||
shm_unlink(self._shm.name)
|
||||
|
||||
self._first.destroy()
|
||||
self._last.destroy()
|
||||
|
||||
def flush(self) -> None:
|
||||
# TODO: flush to storage backend like markestore?
|
||||
...
|
||||
|
||||
|
||||
def open_shm_ndarray(
|
||||
size: int,
|
||||
key: str | None = None,
|
||||
dtype: np.dtype | None = None,
|
||||
append_start_index: int | None = None,
|
||||
readonly: bool = False,
|
||||
|
||||
) -> ShmArray:
|
||||
'''
|
||||
Open a memory shared ``numpy`` using the standard library.
|
||||
|
||||
This call unlinks (aka permanently destroys) the buffer on teardown
|
||||
and thus should be used from the parent-most accessor (process).
|
||||
|
||||
'''
|
||||
# create new shared mem segment for which we
|
||||
# have write permission
|
||||
a = np.zeros(size, dtype=dtype)
|
||||
a['index'] = np.arange(len(a))
|
||||
|
||||
shm = SharedMemory(
|
||||
name=key,
|
||||
create=True,
|
||||
size=a.nbytes
|
||||
)
|
||||
array = np.ndarray(
|
||||
a.shape,
|
||||
dtype=a.dtype,
|
||||
buffer=shm.buf
|
||||
)
|
||||
array[:] = a[:]
|
||||
array.setflags(write=int(not readonly))
|
||||
|
||||
token = _make_token(
|
||||
key=key,
|
||||
size=size,
|
||||
dtype=dtype,
|
||||
)
|
||||
|
||||
# create single entry arrays for storing an first and last indices
|
||||
first = SharedInt(
|
||||
shm=SharedMemory(
|
||||
name=token.shm_first_index_name,
|
||||
create=True,
|
||||
size=4, # std int
|
||||
)
|
||||
)
|
||||
|
||||
last = SharedInt(
|
||||
shm=SharedMemory(
|
||||
name=token.shm_last_index_name,
|
||||
create=True,
|
||||
size=4, # std int
|
||||
)
|
||||
)
|
||||
|
||||
# Start the "real-time" append-updated (or "pushed-to") section
|
||||
# after some start index: ``append_start_index``. This allows appending
|
||||
# from a start point in the array which isn't the 0 index and looks
|
||||
# something like,
|
||||
# -------------------------
|
||||
# | | i
|
||||
# _________________________
|
||||
# <-------------> <------->
|
||||
# history real-time
|
||||
#
|
||||
# Once fully "prepended", the history section will leave the
|
||||
# ``ShmArray._start.value: int = 0`` and the yet-to-be written
|
||||
# real-time section will start at ``ShmArray.index: int``.
|
||||
|
||||
# this sets the index to nearly 2/3rds into the the length of
|
||||
# the buffer leaving at least a "days worth of second samples"
|
||||
# for the real-time section.
|
||||
if append_start_index is None:
|
||||
append_start_index = round(size * 0.616)
|
||||
|
||||
last.value = first.value = append_start_index
|
||||
|
||||
shmarr = ShmArray(
|
||||
array,
|
||||
first,
|
||||
last,
|
||||
shm,
|
||||
)
|
||||
|
||||
assert shmarr._token == token
|
||||
_known_tokens[key] = shmarr.token
|
||||
|
||||
# "unlink" created shm on process teardown by
|
||||
# pushing teardown calls onto actor context stack
|
||||
stack = tractor.current_actor().lifetime_stack
|
||||
stack.callback(shmarr.close)
|
||||
stack.callback(shmarr.destroy)
|
||||
|
||||
return shmarr
|
||||
|
||||
|
||||
def attach_shm_ndarray(
|
||||
token: tuple[str, str, tuple[str, str]],
|
||||
readonly: bool = True,
|
||||
|
||||
) -> ShmArray:
|
||||
'''
|
||||
Attach to an existing shared memory array previously
|
||||
created by another process using ``open_shared_array``.
|
||||
|
||||
No new shared mem is allocated but wrapper types for read/write
|
||||
access are constructed.
|
||||
|
||||
'''
|
||||
token = NDToken.from_msg(token)
|
||||
key = token.shm_name
|
||||
|
||||
if key in _known_tokens:
|
||||
assert NDToken.from_msg(_known_tokens[key]) == token, "WTF"
|
||||
|
||||
# XXX: ugh, looks like due to the ``shm_open()`` C api we can't
|
||||
# actually place files in a subdir, see discussion here:
|
||||
# https://stackoverflow.com/a/11103289
|
||||
|
||||
# attach to array buffer and view as per dtype
|
||||
_err: Optional[Exception] = None
|
||||
for _ in range(3):
|
||||
try:
|
||||
shm = SharedMemory(
|
||||
name=key,
|
||||
create=False,
|
||||
)
|
||||
break
|
||||
except OSError as oserr:
|
||||
_err = oserr
|
||||
time.sleep(0.1)
|
||||
else:
|
||||
if _err:
|
||||
raise _err
|
||||
|
||||
shmarr = np.ndarray(
|
||||
(token.size,),
|
||||
dtype=token.dtype,
|
||||
buffer=shm.buf
|
||||
)
|
||||
shmarr.setflags(write=int(not readonly))
|
||||
|
||||
first = SharedInt(
|
||||
shm=SharedMemory(
|
||||
name=token.shm_first_index_name,
|
||||
create=False,
|
||||
size=4, # std int
|
||||
),
|
||||
)
|
||||
last = SharedInt(
|
||||
shm=SharedMemory(
|
||||
name=token.shm_last_index_name,
|
||||
create=False,
|
||||
size=4, # std int
|
||||
),
|
||||
)
|
||||
|
||||
# make sure we can read
|
||||
first.value
|
||||
|
||||
sha = ShmArray(
|
||||
shmarr,
|
||||
first,
|
||||
last,
|
||||
shm,
|
||||
)
|
||||
# read test
|
||||
sha.array
|
||||
|
||||
# Stash key -> token knowledge for future queries
|
||||
# via `maybe_opepn_shm_array()` but only after we know
|
||||
# we can attach.
|
||||
if key not in _known_tokens:
|
||||
_known_tokens[key] = token
|
||||
|
||||
# "close" attached shm on actor teardown
|
||||
tractor.current_actor().lifetime_stack.callback(sha.close)
|
||||
|
||||
return sha
|
||||
|
||||
|
||||
def maybe_open_shm_ndarray(
|
||||
key: str, # unique identifier for segment
|
||||
size: int,
|
||||
dtype: np.dtype | None = None,
|
||||
append_start_index: int = 0,
|
||||
readonly: bool = True,
|
||||
|
||||
) -> tuple[ShmArray, bool]:
|
||||
'''
|
||||
Attempt to attach to a shared memory block using a "key" lookup
|
||||
to registered blocks in the users overall "system" registry
|
||||
(presumes you don't have the block's explicit token).
|
||||
|
||||
This function is meant to solve the problem of discovering whether
|
||||
a shared array token has been allocated or discovered by the actor
|
||||
running in **this** process. Systems where multiple actors may seek
|
||||
to access a common block can use this function to attempt to acquire
|
||||
a token as discovered by the actors who have previously stored
|
||||
a "key" -> ``NDToken`` map in an actor local (aka python global)
|
||||
variable.
|
||||
|
||||
If you know the explicit ``NDToken`` for your memory segment instead
|
||||
use ``attach_shm_array``.
|
||||
|
||||
'''
|
||||
try:
|
||||
# see if we already know this key
|
||||
token = _known_tokens[key]
|
||||
return (
|
||||
attach_shm_ndarray(
|
||||
token=token,
|
||||
readonly=readonly,
|
||||
),
|
||||
False, # not newly opened
|
||||
)
|
||||
except KeyError:
|
||||
log.warning(f"Could not find {key} in shms cache")
|
||||
if dtype:
|
||||
token = _make_token(
|
||||
key,
|
||||
size=size,
|
||||
dtype=dtype,
|
||||
)
|
||||
else:
|
||||
|
||||
try:
|
||||
return (
|
||||
attach_shm_ndarray(
|
||||
token=token,
|
||||
readonly=readonly,
|
||||
),
|
||||
False,
|
||||
)
|
||||
except FileNotFoundError:
|
||||
log.warning(f"Could not attach to shm with token {token}")
|
||||
|
||||
# This actor does not know about memory
|
||||
# associated with the provided "key".
|
||||
# Attempt to open a block and expect
|
||||
# to fail if a block has been allocated
|
||||
# on the OS by someone else.
|
||||
return (
|
||||
open_shm_ndarray(
|
||||
key=key,
|
||||
size=size,
|
||||
dtype=dtype,
|
||||
append_start_index=append_start_index,
|
||||
readonly=readonly,
|
||||
),
|
||||
True,
|
||||
)
|
||||
|
||||
|
||||
class ShmList(ShareableList):
|
||||
'''
|
||||
Carbon copy of ``.shared_memory.ShareableList`` with a few
|
||||
enhancements:
|
||||
|
||||
- readonly mode via instance var flag `._readonly: bool`
|
||||
- ``.__getitem__()`` accepts ``slice`` inputs
|
||||
- exposes the underlying buffer "name" as a ``.key: str``
|
||||
|
||||
'''
|
||||
def __init__(
|
||||
self,
|
||||
sequence: list | None = None,
|
||||
*,
|
||||
name: str | None = None,
|
||||
readonly: bool = True
|
||||
|
||||
) -> None:
|
||||
self._readonly = readonly
|
||||
self._key = name
|
||||
return super().__init__(
|
||||
sequence=sequence,
|
||||
name=name,
|
||||
)
|
||||
|
||||
@property
|
||||
def key(self) -> str:
|
||||
return self._key
|
||||
|
||||
@property
|
||||
def readonly(self) -> bool:
|
||||
return self._readonly
|
||||
|
||||
def __setitem__(
|
||||
self,
|
||||
position,
|
||||
value,
|
||||
|
||||
) -> None:
|
||||
|
||||
# mimick ``numpy`` error
|
||||
if self._readonly:
|
||||
raise ValueError('assignment destination is read-only')
|
||||
|
||||
return super().__setitem__(position, value)
|
||||
|
||||
def __getitem__(
|
||||
self,
|
||||
indexish,
|
||||
) -> list:
|
||||
|
||||
# NOTE: this is a non-writeable view (copy?) of the buffer
|
||||
# in a new list instance.
|
||||
if isinstance(indexish, slice):
|
||||
return list(self)[indexish]
|
||||
|
||||
return super().__getitem__(indexish)
|
||||
|
||||
# TODO: should we offer a `.array` and `.push()` equivalent
|
||||
# to the `ShmArray`?
|
||||
# currently we have the following limitations:
|
||||
# - can't write slices of input using traditional slice-assign
|
||||
# syntax due to the ``ShareableList.__setitem__()`` implementation.
|
||||
# - ``list(shmlist)`` returns a non-mutable copy instead of
|
||||
# a writeable view which would be handier numpy-style ops.
|
||||
|
||||
|
||||
def open_shm_list(
|
||||
key: str,
|
||||
sequence: list | None = None,
|
||||
size: int = int(2 ** 10),
|
||||
dtype: float | int | bool | str | bytes | None = float,
|
||||
readonly: bool = True,
|
||||
|
||||
) -> ShmList:
|
||||
|
||||
if sequence is None:
|
||||
default = {
|
||||
float: 0.,
|
||||
int: 0,
|
||||
bool: True,
|
||||
str: 'doggy',
|
||||
None: None,
|
||||
}[dtype]
|
||||
sequence = [default] * size
|
||||
|
||||
shml = ShmList(
|
||||
sequence=sequence,
|
||||
name=key,
|
||||
readonly=readonly,
|
||||
)
|
||||
|
||||
# "close" attached shm on actor teardown
|
||||
try:
|
||||
actor = tractor.current_actor()
|
||||
actor.lifetime_stack.callback(shml.shm.close)
|
||||
actor.lifetime_stack.callback(shml.shm.unlink)
|
||||
except RuntimeError:
|
||||
log.warning('tractor runtime not active, skipping teardown steps')
|
||||
|
||||
return shml
|
||||
|
||||
|
||||
def attach_shm_list(
|
||||
key: str,
|
||||
readonly: bool = False,
|
||||
|
||||
) -> ShmList:
|
||||
|
||||
return ShmList(
|
||||
name=key,
|
||||
readonly=readonly,
|
||||
)
|
||||
|
|
@ -19,7 +19,6 @@ Machinery for actor process spawning using multiple backends.
|
|||
|
||||
"""
|
||||
from __future__ import annotations
|
||||
import multiprocessing as mp
|
||||
import sys
|
||||
import platform
|
||||
from typing import (
|
||||
|
|
@ -54,6 +53,7 @@ from ._exceptions import ActorFailure
|
|||
|
||||
if TYPE_CHECKING:
|
||||
from ._supervise import ActorNursery
|
||||
import multiprocessing as mp
|
||||
ProcessType = TypeVar('ProcessType', mp.Process, trio.Process)
|
||||
|
||||
log = get_logger('tractor')
|
||||
|
|
@ -70,6 +70,7 @@ _spawn_method: SpawnMethodKey = 'trio'
|
|||
|
||||
if platform.system() == 'Windows':
|
||||
|
||||
import multiprocessing as mp
|
||||
_ctx = mp.get_context("spawn")
|
||||
|
||||
async def proc_waiter(proc: mp.Process) -> None:
|
||||
|
|
@ -456,7 +457,7 @@ async def trio_proc(
|
|||
|
||||
# cancel result waiter that may have been spawned in
|
||||
# tandem if not done already
|
||||
log.cancel(
|
||||
log.warning(
|
||||
"Cancelling existing result waiter task for "
|
||||
f"{subactor.uid}")
|
||||
nursery.cancel_scope.cancel()
|
||||
|
|
|
|||
|
|
@ -23,6 +23,11 @@ from typing import (
|
|||
Any,
|
||||
)
|
||||
|
||||
import trio
|
||||
|
||||
from ._exceptions import NoRuntime
|
||||
|
||||
|
||||
_current_actor: Optional['Actor'] = None # type: ignore # noqa
|
||||
_runtime_vars: dict[str, Any] = {
|
||||
'_debug_mode': False,
|
||||
|
|
@ -32,11 +37,8 @@ _runtime_vars: dict[str, Any] = {
|
|||
|
||||
|
||||
def current_actor(err_on_no_runtime: bool = True) -> 'Actor': # type: ignore # noqa
|
||||
'''
|
||||
Get the process-local actor instance.
|
||||
|
||||
'''
|
||||
from ._exceptions import NoRuntime
|
||||
"""Get the process-local actor instance.
|
||||
"""
|
||||
if _current_actor is None and err_on_no_runtime:
|
||||
raise NoRuntime("No local actor has been initialized yet")
|
||||
|
||||
|
|
@ -44,20 +46,16 @@ def current_actor(err_on_no_runtime: bool = True) -> 'Actor': # type: ignore #
|
|||
|
||||
|
||||
def is_main_process() -> bool:
|
||||
'''
|
||||
Bool determining if this actor is running in the top-most process.
|
||||
|
||||
'''
|
||||
"""Bool determining if this actor is running in the top-most process.
|
||||
"""
|
||||
import multiprocessing as mp
|
||||
return mp.current_process().name == 'MainProcess'
|
||||
|
||||
|
||||
def debug_mode() -> bool:
|
||||
'''
|
||||
Bool determining if "debug mode" is on which enables
|
||||
"""Bool determining if "debug mode" is on which enables
|
||||
remote subactor pdb entry on crashes.
|
||||
|
||||
'''
|
||||
"""
|
||||
return bool(_runtime_vars['_debug_mode'])
|
||||
|
||||
|
||||
|
|
|
|||
|
|
@ -14,36 +14,31 @@
|
|||
# You should have received a copy of the GNU Affero General Public License
|
||||
# along with this program. If not, see <https://www.gnu.org/licenses/>.
|
||||
|
||||
'''
|
||||
"""
|
||||
Message stream types and APIs.
|
||||
|
||||
The machinery and types behind ``Context.open_stream()``
|
||||
|
||||
'''
|
||||
"""
|
||||
from __future__ import annotations
|
||||
import inspect
|
||||
from contextlib import asynccontextmanager as acm
|
||||
from contextlib import asynccontextmanager
|
||||
from dataclasses import dataclass
|
||||
from typing import (
|
||||
Any,
|
||||
Optional,
|
||||
Callable,
|
||||
AsyncIterator,
|
||||
TYPE_CHECKING,
|
||||
AsyncGenerator,
|
||||
AsyncIterator
|
||||
)
|
||||
|
||||
import warnings
|
||||
|
||||
import trio
|
||||
|
||||
from ._exceptions import (
|
||||
unpack_error,
|
||||
)
|
||||
from ._ipc import Channel
|
||||
from ._exceptions import unpack_error, ContextCancelled
|
||||
from ._state import current_actor
|
||||
from .log import get_logger
|
||||
from .trionics import (
|
||||
broadcast_receiver,
|
||||
BroadcastReceiver,
|
||||
)
|
||||
|
||||
if TYPE_CHECKING:
|
||||
from ._context import Context
|
||||
from .trionics import broadcast_receiver, BroadcastReceiver
|
||||
|
||||
|
||||
log = get_logger(__name__)
|
||||
|
|
@ -75,9 +70,9 @@ class MsgStream(trio.abc.Channel):
|
|||
'''
|
||||
def __init__(
|
||||
self,
|
||||
ctx: Context, # typing: ignore # noqa
|
||||
ctx: 'Context', # typing: ignore # noqa
|
||||
rx_chan: trio.MemoryReceiveChannel,
|
||||
_broadcaster: BroadcastReceiver | None = None,
|
||||
_broadcaster: Optional[BroadcastReceiver] = None,
|
||||
|
||||
) -> None:
|
||||
self._ctx = ctx
|
||||
|
|
@ -280,7 +275,7 @@ class MsgStream(trio.abc.Channel):
|
|||
# still need to consume msgs that are "in transit" from the far
|
||||
# end (eg. for ``Context.result()``).
|
||||
|
||||
@acm
|
||||
@asynccontextmanager
|
||||
async def subscribe(
|
||||
self,
|
||||
|
||||
|
|
@ -340,8 +335,8 @@ class MsgStream(trio.abc.Channel):
|
|||
Send a message over this stream to the far end.
|
||||
|
||||
'''
|
||||
if self._ctx._remote_error:
|
||||
raise self._ctx._remote_error # from None
|
||||
if self._ctx._error:
|
||||
raise self._ctx._error # from None
|
||||
|
||||
if self._closed:
|
||||
raise trio.ClosedResourceError('This stream was already closed')
|
||||
|
|
@ -349,11 +344,371 @@ class MsgStream(trio.abc.Channel):
|
|||
await self._ctx.chan.send({'yield': data, 'cid': self._ctx.cid})
|
||||
|
||||
|
||||
def stream(func: Callable) -> Callable:
|
||||
@dataclass
|
||||
class Context:
|
||||
'''
|
||||
Mark an async function as a streaming routine with ``@stream``.
|
||||
An inter-actor, ``trio`` task communication context.
|
||||
|
||||
NB: This class should never be instatiated directly, it is delivered
|
||||
by either runtime machinery to a remotely started task or by entering
|
||||
``Portal.open_context()``.
|
||||
|
||||
Allows maintaining task or protocol specific state between
|
||||
2 communicating actor tasks. A unique context is created on the
|
||||
callee side/end for every request to a remote actor from a portal.
|
||||
|
||||
A context can be cancelled and (possibly eventually restarted) from
|
||||
either side of the underlying IPC channel, open task oriented
|
||||
message streams and acts as an IPC aware inter-actor-task cancel
|
||||
scope.
|
||||
|
||||
'''
|
||||
chan: Channel
|
||||
cid: str
|
||||
|
||||
# these are the "feeder" channels for delivering
|
||||
# message values to the local task from the runtime
|
||||
# msg processing loop.
|
||||
_recv_chan: trio.MemoryReceiveChannel
|
||||
_send_chan: trio.MemorySendChannel
|
||||
|
||||
_remote_func_type: Optional[str] = None
|
||||
|
||||
# only set on the caller side
|
||||
_portal: Optional['Portal'] = None # type: ignore # noqa
|
||||
_result: Optional[Any] = False
|
||||
_error: Optional[BaseException] = None
|
||||
|
||||
# status flags
|
||||
_cancel_called: bool = False
|
||||
_cancel_msg: Optional[str] = None
|
||||
_enter_debugger_on_cancel: bool = True
|
||||
_started_called: bool = False
|
||||
_started_received: bool = False
|
||||
_stream_opened: bool = False
|
||||
|
||||
# only set on the callee side
|
||||
_scope_nursery: Optional[trio.Nursery] = None
|
||||
|
||||
_backpressure: bool = False
|
||||
|
||||
async def send_yield(self, data: Any) -> None:
|
||||
|
||||
warnings.warn(
|
||||
"`Context.send_yield()` is now deprecated. "
|
||||
"Use ``MessageStream.send()``. ",
|
||||
DeprecationWarning,
|
||||
stacklevel=2,
|
||||
)
|
||||
await self.chan.send({'yield': data, 'cid': self.cid})
|
||||
|
||||
async def send_stop(self) -> None:
|
||||
await self.chan.send({'stop': True, 'cid': self.cid})
|
||||
|
||||
async def _maybe_raise_from_remote_msg(
|
||||
self,
|
||||
msg: dict[str, Any],
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
(Maybe) unpack and raise a msg error into the local scope
|
||||
nursery for this context.
|
||||
|
||||
Acts as a form of "relay" for a remote error raised
|
||||
in the corresponding remote callee task.
|
||||
|
||||
'''
|
||||
error = msg.get('error')
|
||||
if error:
|
||||
# If this is an error message from a context opened by
|
||||
# ``Portal.open_context()`` we want to interrupt any ongoing
|
||||
# (child) tasks within that context to be notified of the remote
|
||||
# error relayed here.
|
||||
#
|
||||
# The reason we may want to raise the remote error immediately
|
||||
# is that there is no guarantee the associated local task(s)
|
||||
# will attempt to read from any locally opened stream any time
|
||||
# soon.
|
||||
#
|
||||
# NOTE: this only applies when
|
||||
# ``Portal.open_context()`` has been called since it is assumed
|
||||
# (currently) that other portal APIs (``Portal.run()``,
|
||||
# ``.run_in_actor()``) do their own error checking at the point
|
||||
# of the call and result processing.
|
||||
log.error(
|
||||
f'Remote context error for {self.chan.uid}:{self.cid}:\n'
|
||||
f'{msg["error"]["tb_str"]}'
|
||||
)
|
||||
error = unpack_error(msg, self.chan)
|
||||
if (
|
||||
isinstance(error, ContextCancelled) and
|
||||
self._cancel_called
|
||||
):
|
||||
# this is an expected cancel request response message
|
||||
# and we don't need to raise it in scope since it will
|
||||
# potentially override a real error
|
||||
return
|
||||
|
||||
self._error = error
|
||||
|
||||
# TODO: tempted to **not** do this by-reraising in a
|
||||
# nursery and instead cancel a surrounding scope, detect
|
||||
# the cancellation, then lookup the error that was set?
|
||||
if self._scope_nursery:
|
||||
|
||||
async def raiser():
|
||||
raise self._error from None
|
||||
|
||||
# from trio.testing import wait_all_tasks_blocked
|
||||
# await wait_all_tasks_blocked()
|
||||
if not self._scope_nursery._closed: # type: ignore
|
||||
self._scope_nursery.start_soon(raiser)
|
||||
|
||||
async def cancel(
|
||||
self,
|
||||
msg: Optional[str] = None,
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
Cancel this inter-actor-task context.
|
||||
|
||||
Request that the far side cancel it's current linked context,
|
||||
Timeout quickly in an attempt to sidestep 2-generals...
|
||||
|
||||
'''
|
||||
side = 'caller' if self._portal else 'callee'
|
||||
if msg:
|
||||
assert side == 'callee', 'Only callee side can provide cancel msg'
|
||||
|
||||
log.cancel(f'Cancelling {side} side of context to {self.chan.uid}')
|
||||
|
||||
self._cancel_called = True
|
||||
|
||||
if side == 'caller':
|
||||
if not self._portal:
|
||||
raise RuntimeError(
|
||||
"No portal found, this is likely a callee side context"
|
||||
)
|
||||
|
||||
cid = self.cid
|
||||
with trio.move_on_after(0.5) as cs:
|
||||
cs.shield = True
|
||||
log.cancel(
|
||||
f"Cancelling stream {cid} to "
|
||||
f"{self._portal.channel.uid}")
|
||||
|
||||
# NOTE: we're telling the far end actor to cancel a task
|
||||
# corresponding to *this actor*. The far end local channel
|
||||
# instance is passed to `Actor._cancel_task()` implicitly.
|
||||
await self._portal.run_from_ns('self', '_cancel_task', cid=cid)
|
||||
|
||||
if cs.cancelled_caught:
|
||||
# XXX: there's no way to know if the remote task was indeed
|
||||
# cancelled in the case where the connection is broken or
|
||||
# some other network error occurred.
|
||||
# if not self._portal.channel.connected():
|
||||
if not self.chan.connected():
|
||||
log.cancel(
|
||||
"May have failed to cancel remote task "
|
||||
f"{cid} for {self._portal.channel.uid}")
|
||||
else:
|
||||
log.cancel(
|
||||
"Timed out on cancelling remote task "
|
||||
f"{cid} for {self._portal.channel.uid}")
|
||||
|
||||
# callee side remote task
|
||||
else:
|
||||
self._cancel_msg = msg
|
||||
|
||||
# TODO: should we have an explicit cancel message
|
||||
# or is relaying the local `trio.Cancelled` as an
|
||||
# {'error': trio.Cancelled, cid: "blah"} enough?
|
||||
# This probably gets into the discussion in
|
||||
# https://github.com/goodboy/tractor/issues/36
|
||||
assert self._scope_nursery
|
||||
self._scope_nursery.cancel_scope.cancel()
|
||||
|
||||
if self._recv_chan:
|
||||
await self._recv_chan.aclose()
|
||||
|
||||
@asynccontextmanager
|
||||
async def open_stream(
|
||||
|
||||
self,
|
||||
backpressure: Optional[bool] = True,
|
||||
msg_buffer_size: Optional[int] = None,
|
||||
|
||||
) -> AsyncGenerator[MsgStream, None]:
|
||||
'''
|
||||
Open a ``MsgStream``, a bi-directional stream connected to the
|
||||
cross-actor (far end) task for this ``Context``.
|
||||
|
||||
This context manager must be entered on both the caller and
|
||||
callee for the stream to logically be considered "connected".
|
||||
|
||||
A ``MsgStream`` is currently "one-shot" use, meaning if you
|
||||
close it you can not "re-open" it for streaming and instead you
|
||||
must re-establish a new surrounding ``Context`` using
|
||||
``Portal.open_context()``. In the future this may change but
|
||||
currently there seems to be no obvious reason to support
|
||||
"re-opening":
|
||||
- pausing a stream can be done with a message.
|
||||
- task errors will normally require a restart of the entire
|
||||
scope of the inter-actor task context due to the nature of
|
||||
``trio``'s cancellation system.
|
||||
|
||||
'''
|
||||
actor = current_actor()
|
||||
|
||||
# here we create a mem chan that corresponds to the
|
||||
# far end caller / callee.
|
||||
|
||||
# Likewise if the surrounding context has been cancelled we error here
|
||||
# since it likely means the surrounding block was exited or
|
||||
# killed
|
||||
|
||||
if self._cancel_called:
|
||||
task = trio.lowlevel.current_task().name
|
||||
raise ContextCancelled(
|
||||
f'Context around {actor.uid[0]}:{task} was already cancelled!'
|
||||
)
|
||||
|
||||
if not self._portal and not self._started_called:
|
||||
raise RuntimeError(
|
||||
'Context.started()` must be called before opening a stream'
|
||||
)
|
||||
|
||||
# NOTE: in one way streaming this only happens on the
|
||||
# caller side inside `Actor.start_remote_task()` so if you try
|
||||
# to send a stop from the caller to the callee in the
|
||||
# single-direction-stream case you'll get a lookup error
|
||||
# currently.
|
||||
ctx = actor.get_context(
|
||||
self.chan,
|
||||
self.cid,
|
||||
msg_buffer_size=msg_buffer_size,
|
||||
)
|
||||
ctx._backpressure = backpressure
|
||||
assert ctx is self
|
||||
|
||||
# XXX: If the underlying channel feeder receive mem chan has
|
||||
# been closed then likely client code has already exited
|
||||
# a ``.open_stream()`` block prior or there was some other
|
||||
# unanticipated error or cancellation from ``trio``.
|
||||
|
||||
if ctx._recv_chan._closed:
|
||||
raise trio.ClosedResourceError(
|
||||
'The underlying channel for this stream was already closed!?')
|
||||
|
||||
async with MsgStream(
|
||||
ctx=self,
|
||||
rx_chan=ctx._recv_chan,
|
||||
) as stream:
|
||||
|
||||
if self._portal:
|
||||
self._portal._streams.add(stream)
|
||||
|
||||
try:
|
||||
self._stream_opened = True
|
||||
|
||||
# XXX: do we need this?
|
||||
# ensure we aren't cancelled before yielding the stream
|
||||
# await trio.lowlevel.checkpoint()
|
||||
yield stream
|
||||
|
||||
# NOTE: Make the stream "one-shot use". On exit, signal
|
||||
# ``trio.EndOfChannel``/``StopAsyncIteration`` to the
|
||||
# far end.
|
||||
await stream.aclose()
|
||||
|
||||
finally:
|
||||
if self._portal:
|
||||
try:
|
||||
self._portal._streams.remove(stream)
|
||||
except KeyError:
|
||||
log.warning(
|
||||
f'Stream was already destroyed?\n'
|
||||
f'actor: {self.chan.uid}\n'
|
||||
f'ctx id: {self.cid}'
|
||||
)
|
||||
|
||||
async def result(self) -> Any:
|
||||
'''
|
||||
From a caller side, wait for and return the final result from
|
||||
the callee side task.
|
||||
|
||||
'''
|
||||
assert self._portal, "Context.result() can not be called from callee!"
|
||||
assert self._recv_chan
|
||||
|
||||
if self._result is False:
|
||||
|
||||
if not self._recv_chan._closed: # type: ignore
|
||||
|
||||
# wait for a final context result consuming
|
||||
# and discarding any bi dir stream msgs still
|
||||
# in transit from the far end.
|
||||
while True:
|
||||
|
||||
msg = await self._recv_chan.receive()
|
||||
try:
|
||||
self._result = msg['return']
|
||||
break
|
||||
except KeyError as msgerr:
|
||||
|
||||
if 'yield' in msg:
|
||||
# far end task is still streaming to us so discard
|
||||
log.warning(f'Discarding stream delivered {msg}')
|
||||
continue
|
||||
|
||||
elif 'stop' in msg:
|
||||
log.debug('Remote stream terminated')
|
||||
continue
|
||||
|
||||
# internal error should never get here
|
||||
assert msg.get('cid'), (
|
||||
"Received internal error at portal?")
|
||||
|
||||
raise unpack_error(
|
||||
msg, self._portal.channel
|
||||
) from msgerr
|
||||
|
||||
return self._result
|
||||
|
||||
async def started(
|
||||
self,
|
||||
value: Optional[Any] = None
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
Indicate to calling actor's task that this linked context
|
||||
has started and send ``value`` to the other side.
|
||||
|
||||
On the calling side ``value`` is the second item delivered
|
||||
in the tuple returned by ``Portal.open_context()``.
|
||||
|
||||
'''
|
||||
if self._portal:
|
||||
raise RuntimeError(
|
||||
f"Caller side context {self} can not call started!")
|
||||
|
||||
elif self._started_called:
|
||||
raise RuntimeError(
|
||||
f"called 'started' twice on context with {self.chan.uid}")
|
||||
|
||||
await self.chan.send({'started': value, 'cid': self.cid})
|
||||
self._started_called = True
|
||||
|
||||
# TODO: do we need a restart api?
|
||||
# async def restart(self) -> None:
|
||||
# pass
|
||||
|
||||
|
||||
def stream(func: Callable) -> Callable:
|
||||
"""Mark an async function as a streaming routine with ``@stream``.
|
||||
|
||||
"""
|
||||
# annotate
|
||||
# TODO: apply whatever solution ``mypy`` ends up picking for this:
|
||||
# https://github.com/python/mypy/issues/2087#issuecomment-769266912
|
||||
func._tractor_stream_function = True # type: ignore
|
||||
|
|
@ -379,3 +734,22 @@ def stream(func: Callable) -> Callable:
|
|||
"(Or ``to_trio`` if using ``asyncio`` in guest mode)."
|
||||
)
|
||||
return func
|
||||
|
||||
|
||||
def context(func: Callable) -> Callable:
|
||||
"""Mark an async function as a streaming routine with ``@context``.
|
||||
|
||||
"""
|
||||
# annotate
|
||||
# TODO: apply whatever solution ``mypy`` ends up picking for this:
|
||||
# https://github.com/python/mypy/issues/2087#issuecomment-769266912
|
||||
func._tractor_context_function = True # type: ignore
|
||||
|
||||
sig = inspect.signature(func)
|
||||
params = sig.parameters
|
||||
if 'ctx' not in params:
|
||||
raise TypeError(
|
||||
"The first argument to the context function "
|
||||
f"{func.__name__} must be `ctx: tractor.Context`"
|
||||
)
|
||||
return func
|
||||
|
|
|
|||
|
|
@ -37,7 +37,7 @@ import trio
|
|||
import wrapt
|
||||
|
||||
from ..log import get_logger
|
||||
from .._context import Context
|
||||
from .._streaming import Context
|
||||
|
||||
|
||||
__all__ = ['pub']
|
||||
|
|
@ -148,8 +148,7 @@ def pub(
|
|||
*,
|
||||
tasks: set[str] = set(),
|
||||
):
|
||||
'''
|
||||
Publisher async generator decorator.
|
||||
"""Publisher async generator decorator.
|
||||
|
||||
A publisher can be called multiple times from different actors but
|
||||
will only spawn a finite set of internal tasks to stream values to
|
||||
|
|
@ -228,8 +227,7 @@ def pub(
|
|||
running in a single actor to stream data to an arbitrary number of
|
||||
subscribers. If you are ok to have a new task running for every call
|
||||
to ``pub_service()`` then probably don't need this.
|
||||
|
||||
'''
|
||||
"""
|
||||
global _pubtask2lock
|
||||
|
||||
# handle the decorator not called with () case
|
||||
|
|
|
|||
|
|
@ -82,10 +82,6 @@ class StackLevelAdapter(logging.LoggerAdapter):
|
|||
msg: str,
|
||||
|
||||
) -> None:
|
||||
'''
|
||||
IPC level msg-ing.
|
||||
|
||||
'''
|
||||
return self.log(5, msg)
|
||||
|
||||
def runtime(
|
||||
|
|
@ -98,20 +94,12 @@ class StackLevelAdapter(logging.LoggerAdapter):
|
|||
self,
|
||||
msg: str,
|
||||
) -> None:
|
||||
'''
|
||||
Cancellation logging, mostly for runtime reporting.
|
||||
|
||||
'''
|
||||
return self.log(16, msg)
|
||||
|
||||
def pdb(
|
||||
self,
|
||||
msg: str,
|
||||
) -> None:
|
||||
'''
|
||||
Debugger logging.
|
||||
|
||||
'''
|
||||
return self.log(500, msg)
|
||||
|
||||
def log(self, level, msg, *args, **kwargs):
|
||||
|
|
@ -193,39 +181,15 @@ def get_logger(
|
|||
'''
|
||||
log = rlog = logging.getLogger(_root_name)
|
||||
|
||||
if (
|
||||
name
|
||||
and name != _proj_name
|
||||
):
|
||||
if name and name != _proj_name:
|
||||
|
||||
# NOTE: for handling for modules that use ``get_logger(__name__)``
|
||||
# we make the following stylistic choice:
|
||||
# - always avoid duplicate project-package token
|
||||
# in msg output: i.e. tractor.tractor _ipc.py in header
|
||||
# looks ridiculous XD
|
||||
# - never show the leaf module name in the {name} part
|
||||
# since in python the {filename} is always this same
|
||||
# module-file.
|
||||
|
||||
sub_name: None | str = None
|
||||
rname, _, sub_name = name.partition('.')
|
||||
pkgpath, _, modfilename = sub_name.rpartition('.')
|
||||
|
||||
# NOTE: for tractor itself never include the last level
|
||||
# module key in the name such that something like: eg.
|
||||
# 'tractor.trionics._broadcast` only includes the first
|
||||
# 2 tokens in the (coloured) name part.
|
||||
if rname == 'tractor':
|
||||
sub_name = pkgpath
|
||||
|
||||
if _root_name in sub_name:
|
||||
duplicate, _, sub_name = sub_name.partition('.')
|
||||
|
||||
if not sub_name:
|
||||
log = rlog
|
||||
else:
|
||||
log = rlog.getChild(sub_name)
|
||||
# handling for modules that use ``get_logger(__name__)`` to
|
||||
# avoid duplicate project-package token in msg output
|
||||
rname, _, tail = name.partition('.')
|
||||
if rname == _root_name:
|
||||
name = tail
|
||||
|
||||
log = rlog.getChild(name)
|
||||
log.level = rlog.level
|
||||
|
||||
# add our actor-task aware adapter which will dynamically look up
|
||||
|
|
@ -278,7 +242,3 @@ def get_console_log(
|
|||
|
||||
def get_loglevel() -> str:
|
||||
return _default_loglevel
|
||||
|
||||
|
||||
# global module logger for tractor itself
|
||||
log = get_logger('tractor')
|
||||
|
|
|
|||
|
|
@ -43,62 +43,38 @@ Built-in messaging patterns, types, APIs and helpers.
|
|||
# - https://github.com/msgpack/msgpack-python#packingunpacking-of-custom-data-type
|
||||
|
||||
from __future__ import annotations
|
||||
from inspect import isfunction
|
||||
from pkgutil import resolve_name
|
||||
|
||||
|
||||
class NamespacePath(str):
|
||||
'''
|
||||
A serializeable description of a (function) Python object
|
||||
location described by the target's module path and namespace
|
||||
key meant as a message-native "packet" to allows actors to
|
||||
point-and-load objects by an absolute ``str`` (and thus
|
||||
serializable) reference.
|
||||
A serializeable description of a (function) Python object location
|
||||
described by the target's module path and namespace key meant as
|
||||
a message-native "packet" to allows actors to point-and-load objects
|
||||
by absolute reference.
|
||||
|
||||
'''
|
||||
_ref: object | type | None = None
|
||||
_ref: object = None
|
||||
|
||||
def load_ref(self) -> object | type:
|
||||
def load_ref(self) -> object:
|
||||
if self._ref is None:
|
||||
self._ref = resolve_name(self)
|
||||
return self._ref
|
||||
|
||||
@staticmethod
|
||||
def _mk_fqnp(ref: type | object) -> tuple[str, str]:
|
||||
'''
|
||||
Generate a minial ``str`` pair which describes a python
|
||||
object's namespace path and object/type name.
|
||||
def to_tuple(
|
||||
self,
|
||||
|
||||
In more precise terms something like:
|
||||
- 'py.namespace.path:object_name',
|
||||
- eg.'tractor.msg:NamespacePath' will be the ``str`` form
|
||||
of THIS type XD
|
||||
|
||||
'''
|
||||
if (
|
||||
isinstance(ref, object)
|
||||
and not isfunction(ref)
|
||||
):
|
||||
name: str = type(ref).__name__
|
||||
else:
|
||||
name: str = getattr(ref, '__name__')
|
||||
|
||||
# fully qualified namespace path, tuple.
|
||||
fqnp: tuple[str, str] = (
|
||||
ref.__module__,
|
||||
name,
|
||||
)
|
||||
return fqnp
|
||||
) -> tuple[str, str]:
|
||||
ref = self.load_ref()
|
||||
return ref.__module__, getattr(ref, '__name__', '')
|
||||
|
||||
@classmethod
|
||||
def from_ref(
|
||||
cls,
|
||||
ref: type | object,
|
||||
ref,
|
||||
|
||||
) -> NamespacePath:
|
||||
|
||||
fqnp: tuple[str, str] = cls._mk_fqnp(ref)
|
||||
return cls(':'.join(fqnp))
|
||||
|
||||
def to_tuple(self) -> tuple[str, str]:
|
||||
return self._mk_fqnp(self.load_ref())
|
||||
return cls(':'.join(
|
||||
(ref.__module__,
|
||||
getattr(ref, '__name__', ''))
|
||||
))
|
||||
|
|
|
|||
|
|
@ -28,6 +28,7 @@ from typing import (
|
|||
Callable,
|
||||
AsyncIterator,
|
||||
Awaitable,
|
||||
Optional,
|
||||
)
|
||||
|
||||
import trio
|
||||
|
|
@ -64,9 +65,9 @@ class LinkedTaskChannel(trio.abc.Channel):
|
|||
_trio_exited: bool = False
|
||||
|
||||
# set after ``asyncio.create_task()``
|
||||
_aio_task: asyncio.Task | None = None
|
||||
_aio_err: BaseException | None = None
|
||||
_broadcaster: BroadcastReceiver | None = None
|
||||
_aio_task: Optional[asyncio.Task] = None
|
||||
_aio_err: Optional[BaseException] = None
|
||||
_broadcaster: Optional[BroadcastReceiver] = None
|
||||
|
||||
async def aclose(self) -> None:
|
||||
await self._from_aio.aclose()
|
||||
|
|
@ -187,7 +188,7 @@ def _run_asyncio_task(
|
|||
|
||||
cancel_scope = trio.CancelScope()
|
||||
aio_task_complete = trio.Event()
|
||||
aio_err: BaseException | None = None
|
||||
aio_err: Optional[BaseException] = None
|
||||
|
||||
chan = LinkedTaskChannel(
|
||||
aio_q, # asyncio.Queue
|
||||
|
|
@ -262,7 +263,7 @@ def _run_asyncio_task(
|
|||
'''
|
||||
nonlocal chan
|
||||
aio_err = chan._aio_err
|
||||
task_err: BaseException | None = None
|
||||
task_err: Optional[BaseException] = None
|
||||
|
||||
# only to avoid ``asyncio`` complaining about uncaptured
|
||||
# task exceptions
|
||||
|
|
@ -328,11 +329,11 @@ async def translate_aio_errors(
|
|||
'''
|
||||
trio_task = trio.lowlevel.current_task()
|
||||
|
||||
aio_err: BaseException | None = None
|
||||
aio_err: Optional[BaseException] = None
|
||||
|
||||
# TODO: make thisi a channel method?
|
||||
def maybe_raise_aio_err(
|
||||
err: Exception | None = None
|
||||
err: Optional[Exception] = None
|
||||
) -> None:
|
||||
aio_err = chan._aio_err
|
||||
if (
|
||||
|
|
|
|||
|
|
@ -25,16 +25,8 @@ from collections import deque
|
|||
from contextlib import asynccontextmanager
|
||||
from functools import partial
|
||||
from operator import ne
|
||||
from typing import (
|
||||
Optional,
|
||||
Callable,
|
||||
Awaitable,
|
||||
Any,
|
||||
AsyncIterator,
|
||||
Protocol,
|
||||
Generic,
|
||||
TypeVar,
|
||||
)
|
||||
from typing import Optional, Callable, Awaitable, Any, AsyncIterator, Protocol
|
||||
from typing import Generic, TypeVar
|
||||
|
||||
import trio
|
||||
from trio._core._run import Task
|
||||
|
|
|
|||
|
|
@ -237,7 +237,7 @@ async def maybe_open_context(
|
|||
yielded = _Cache.values[ctx_key]
|
||||
|
||||
except KeyError:
|
||||
log.debug(f'Allocating new {acm_func} for {ctx_key}')
|
||||
log.info(f'Allocating new {acm_func} for {ctx_key}')
|
||||
mngr = acm_func(**kwargs)
|
||||
resources = _Cache.resources
|
||||
assert not resources.get(ctx_key), f'Resource exists? {ctx_key}'
|
||||
|
|
@ -265,7 +265,7 @@ async def maybe_open_context(
|
|||
if yielded is not None:
|
||||
# if no more consumers, teardown the client
|
||||
if _Cache.users <= 0:
|
||||
log.debug(f'De-allocating resource for {ctx_key}')
|
||||
log.info(f'De-allocating resource for {ctx_key}')
|
||||
|
||||
# XXX: if we're cancelled we the entry may have never
|
||||
# been entered since the nursery task was killed.
|
||||
|
|
|
|||
Loading…
Reference in New Issue