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tractor
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Merge pull request #174 from goodboy/func_refs_always 

Allow passing function refs to `Portal.run()`
py3.9
goodboy 2020-12-22 19:45:10 -05:00 committed by GitHub
parent c3b209fa4f 4bf9b27f57
commit f4f39c29f3
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30 changed files with 332 additions and 147 deletions
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62
docs/index.rst
View File

@ -385,37 +385,61 @@ as ``multiprocessing`` calls it) which is running ``main()``.
.. _remote function execution: https://codespeak.net/execnet/example/test_info.html#remote-exec-a-function-avoiding-inlined-source-part-i
Actor local variables
*********************
Although ``tractor`` uses a *shared-nothing* architecture between processes
you can of course share state between tasks running *within* an actor.
``trio`` tasks spawned via multiple RPC calls to an actor can access global
state using the per actor ``statespace`` dictionary:
Actor local (aka *process global*) variables
********************************************
Although ``tractor`` uses a *shared-nothing* architecture between
processes you can of course share state between tasks running *within*
an actor (since a `trio.run()` runtime is single threaded). ``trio``
tasks spawned via multiple RPC calls to an actor can modify
*process-global-state* defined using Python module attributes:
.. code:: python
statespace = {'doggy': 10}
# a per process cache
_actor_cache: Dict[str, bool] = {}
def check_statespace():
# Remember this runs in a new process so no changes
# will propagate back to the parent actor
assert tractor.current_actor().statespace == statespace
def ping_endpoints(endpoints: List[str]):
"""Start a polling process which runs completely separate
from our root actor/process.
"""
# This runs in a new process so no changes # will propagate
# back to the parent actor
while True:
for ep in endpoints:
status = await check_endpoint_is_up(ep)
_actor_cache[ep] = status
await trio.sleep(0.5)
async def get_alive_endpoints():
nonlocal _actor_cache
return {key for key, value in _actor_cache.items() if value}
async def main():
async with tractor.open_nursery() as n:
await n.run_in_actor(
'checker',
check_statespace,
statespace=statespace
)
portal = await n.run_in_actor(ping_endpoints)
# print the alive endpoints after 3 seconds
await trio.sleep(3)
# this is submitted to be run in our "ping_endpoints" actor
print(await portal.run(get_alive_endpoints))
Of course you don't have to use the ``statespace`` variable (it's mostly
a convenience for passing simple data to newly spawned actors); building
out a state sharing system per-actor is totally up to you.
You can pass any kind of (`msgpack`) serializable data between actors using
function call semantics but building out a state sharing system per-actor
is totally up to you.
Service Discovery

6
examples/a_trynamic_first_scene.py
View File

@ -13,7 +13,7 @@ async def hi():
async def say_hello(other_actor):
async with tractor.wait_for_actor(other_actor) as portal:
return await portal.run(_this_module, 'hi')
return await portal.run(hi)
async def main():
@ -24,14 +24,14 @@ async def main():
print("Alright... Action!")
donny = await n.run_in_actor(
'donny',
say_hello,
name='donny',
# arguments are always named
other_actor='gretchen',
)
gretchen = await n.run_in_actor(
'gretchen',
say_hello,
name='gretchen',
other_actor='donny',
)
print(await gretchen.result())

8
examples/actor_spawning_and_causality.py
View File

@ -2,7 +2,8 @@ import tractor
def cellar_door():
return "Dang that's beautiful"
assert not tractor.is_root_process()
return "Dang that's beautiful"
async def main():
@ -10,7 +11,10 @@ async def main():
"""
async with tractor.open_nursery() as n:
portal = await n.run_in_actor('some_linguist', cellar_door)
portal = await n.run_in_actor(
cellar_door,
name='some_linguist',
)
# The ``async with`` will unblock here since the 'some_linguist'
# actor has completed its main task ``cellar_door``.

4
examples/actor_spawning_and_causality_with_daemon.py
View File

@ -19,9 +19,9 @@ async def main():
rpc_module_paths=[__name__],
)
print(await portal.run(__name__, 'movie_theatre_question'))
print(await portal.run(movie_theatre_question))
# call the subactor a 2nd time
print(await portal.run(__name__, 'movie_theatre_question'))
print(await portal.run(movie_theatre_question))
# the async with will block here indefinitely waiting
# for our actor "frank" to complete, but since it's an

4
examples/asynchronous_generators.py
View File

@ -24,7 +24,7 @@ async def main():
# this async for loop streams values from the above
# async generator running in a separate process
async for letter in await portal.run(__name__, 'stream_forever'):
async for letter in await portal.run(stream_forever):
print(letter)
# we support trio's cancellation system
@ -33,4 +33,4 @@ async def main():
if __name__ == '__main__':
tractor.run(main, start_method='forkserver')
tractor.run(main)

4
examples/debugging/multi_daemon_subactors.py
View File

@ -23,8 +23,8 @@ async def main():
p1 = await n.start_actor('name_error', rpc_module_paths=[__name__])
# retreive results
stream = await p0.run(__name__, 'breakpoint_forever')
await p1.run(__name__, 'name_error')
stream = await p0.run(breakpoint_forever)
await p1.run(name_error)
if __name__ == '__main__':

27
examples/debugging/multi_nested_subactors_error_up_through_nurseries.py
View File

@ -18,10 +18,17 @@ async def spawn_until(depth=0):
async with tractor.open_nursery() as n:
if depth < 1:
# await n.run_in_actor('breakpoint_forever', breakpoint_forever)
await n.run_in_actor('name_error', name_error)
await n.run_in_actor(
name_error,
name='name_error'
)
else:
depth -= 1
await n.run_in_actor(f'spawn_until_{depth}', spawn_until, depth=depth)
await n.run_in_actor(
spawn_until,
depth=depth,
name=f'spawn_until_{depth}',
)
async def main():
@ -46,12 +53,20 @@ async def main():
async with tractor.open_nursery() as n:
# spawn both actors
portal = await n.run_in_actor('spawner0', spawn_until, depth=3)
portal1 = await n.run_in_actor('spawner1', spawn_until, depth=4)
portal = await n.run_in_actor(
spawn_until,
depth=3,
name='spawner0',
)
portal1 = await n.run_in_actor(
spawn_until,
depth=4,
name='spawner1',
)
# gah still an issue here.
# await portal.result()
# await portal1.result()
await portal.result()
await portal1.result()
if __name__ == '__main__':

15
examples/debugging/multi_subactor_root_errors.py
View File

@ -10,7 +10,10 @@ async def spawn_error():
""""A nested nursery that triggers another ``NameError``.
"""
async with tractor.open_nursery() as n:
portal = await n.run_in_actor('name_error_1', name_error)
portal = await n.run_in_actor(
name_error,
name='name_error_1',
)
return await portal.result()
@ -27,8 +30,14 @@ async def main():
async with tractor.open_nursery() as n:
# spawn both actors
portal = await n.run_in_actor('name_error', name_error)
portal1 = await n.run_in_actor('spawn_error', spawn_error)
portal = await n.run_in_actor(
name_error,
name='name_error',
)
portal1 = await n.run_in_actor(
spawn_error,
name='spawn_error',
)
# trigger a root actor error
assert 0

11
examples/debugging/multi_subactors.py
View File

@ -18,7 +18,10 @@ async def spawn_error():
""""A nested nursery that triggers another ``NameError``.
"""
async with tractor.open_nursery() as n:
portal = await n.run_in_actor('name_error_1', name_error)
portal = await n.run_in_actor(
name_error,
name='name_error_1',
)
return await portal.result()
@ -38,9 +41,9 @@ async def main():
# Spawn both actors, don't bother with collecting results
# (would result in a different debugger outcome due to parent's
# cancellation).
await n.run_in_actor('bp_forever', breakpoint_forever)
await n.run_in_actor('name_error', name_error)
await n.run_in_actor('spawn_error', spawn_error)
await n.run_in_actor(breakpoint_forever)
await n.run_in_actor(name_error)
await n.run_in_actor(spawn_error)
if __name__ == '__main__':

20
examples/debugging/root_cancelled_but_child_is_in_tty_lock.py
View File

@ -12,10 +12,14 @@ async def spawn_until(depth=0):
async with tractor.open_nursery() as n:
if depth < 1:
# await n.run_in_actor('breakpoint_forever', breakpoint_forever)
await n.run_in_actor('name_error', name_error)
await n.run_in_actor(name_error)
else:
depth -= 1
await n.run_in_actor(f'spawn_until_{depth}', spawn_until, depth=depth)
await n.run_in_actor(
spawn_until,
depth=depth,
name=f'spawn_until_{depth}',
)
async def main():
@ -36,8 +40,16 @@ async def main():
async with tractor.open_nursery() as n:
# spawn both actors
portal = await n.run_in_actor('spawner0', spawn_until, depth=0)
portal1 = await n.run_in_actor('spawner1', spawn_until, depth=1)
portal = await n.run_in_actor(
spawn_until,
depth=0,
name='spawner0',
)
portal1 = await n.run_in_actor(
spawn_until,
depth=1,
name='spawner1',
)
# nursery cancellation should be triggered due to propagated
# error from child.

1
examples/debugging/subactor_breakpoint.py
View File

@ -15,7 +15,6 @@ async def main():
async with tractor.open_nursery() as n:
portal = await n.run_in_actor(
'breakpoint_forever',
breakpoint_forever,
)
await portal.result()

2
examples/debugging/subactor_error.py
View File

@ -8,7 +8,7 @@ async def name_error():
async def main():
async with tractor.open_nursery() as n:
portal = await n.run_in_actor('name_error', name_error)
portal = await n.run_in_actor(name_error)
await portal.result()

6
examples/full_fledged_streaming_service.py
View File

@ -30,9 +30,7 @@ async def aggregate(seed):
async def push_to_chan(portal, send_chan):
async with send_chan:
async for value in await portal.run(
__name__, 'stream_data', seed=seed
):
async for value in await portal.run(stream_data, seed=seed):
# leverage trio's built-in backpressure
await send_chan.send(value)
@ -74,8 +72,8 @@ async def main():
pre_start = time.time()
portal = await nursery.run_in_actor(
'aggregator',
aggregate,
name='aggregator',
seed=seed,
)

2
examples/remote_error_propagation.py
View File

@ -15,7 +15,7 @@ async def main():
))
# start one actor that will fail immediately
await n.run_in_actor('extra', assert_err)
await n.run_in_actor(assert_err)
# should error here with a ``RemoteActorError`` containing
# an ``AssertionError`` and all the other actors have been cancelled

51
tests/test_cancellation.py
View File

@ -49,7 +49,7 @@ def test_remote_error(arb_addr, args_err):
async def main():
async with tractor.open_nursery() as nursery:
portal = await nursery.run_in_actor('errorer', assert_err, **args)
portal = await nursery.run_in_actor(assert_err, name='errorer', **args)
# get result(s) from main task
try:
@ -73,8 +73,8 @@ def test_multierror(arb_addr):
async def main():
async with tractor.open_nursery() as nursery:
await nursery.run_in_actor('errorer1', assert_err)
portal2 = await nursery.run_in_actor('errorer2', assert_err)
await nursery.run_in_actor(assert_err, name='errorer1')
portal2 = await nursery.run_in_actor(assert_err, name='errorer2')
# get result(s) from main task
try:
@ -104,7 +104,10 @@ def test_multierror_fast_nursery(arb_addr, start_method, num_subactors, delay):
async with tractor.open_nursery() as nursery:
for i in range(num_subactors):
await nursery.run_in_actor(
f'errorer{i}', assert_err, delay=delay)
assert_err,
name=f'errorer{i}',
delay=delay
)
with pytest.raises(trio.MultiError) as exc_info:
tractor.run(main, arbiter_addr=arb_addr)
@ -134,7 +137,7 @@ def test_cancel_single_subactor(arb_addr, mechanism):
portal = await nursery.start_actor(
'nothin', rpc_module_paths=[__name__],
)
assert (await portal.run(__name__, 'do_nothing')) is None
assert (await portal.run(do_nothing)) is None
if mechanism == 'nursery_cancel':
# would hang otherwise
@ -170,7 +173,7 @@ async def test_cancel_infinite_streamer(start_method):
# this async for loop streams values from the above
# async generator running in a separate process
async for letter in await portal.run(__name__, 'stream_forever'):
async for letter in await portal.run(stream_forever):
print(letter)
# we support trio's cancellation system
@ -231,7 +234,12 @@ async def test_some_cancels_all(num_actors_and_errs, start_method, loglevel):
for i in range(num_actors):
# start actor(s) that will fail immediately
riactor_portals.append(
await n.run_in_actor(f'actor_{i}', func, **kwargs))
await n.run_in_actor(
func,
name=f'actor_{i}',
**kwargs
)
)
if da_func:
func, kwargs, expect_error = da_func
@ -239,7 +247,8 @@ async def test_some_cancels_all(num_actors_and_errs, start_method, loglevel):
# if this function fails then we should error here
# and the nursery should teardown all other actors
try:
await portal.run(__name__, func.__name__, **kwargs)
await portal.run(func, **kwargs)
except tractor.RemoteActorError as err:
assert err.type == err_type
# we only expect this first error to propogate
@ -276,21 +285,24 @@ async def spawn_and_error(breadth, depth) -> None:
name = tractor.current_actor().name
async with tractor.open_nursery() as nursery:
for i in range(breadth):
if depth > 0:
args = (
f'spawner_{i}_depth_{depth}',
spawn_and_error,
)
kwargs = {
'name': f'spawner_{i}_depth_{depth}',
'breadth': breadth,
'depth': depth - 1,
}
else:
args = (
f'{name}_errorer_{i}',
assert_err,
)
kwargs = {}
kwargs = {
'name': f'{name}_errorer_{i}',
}
await nursery.run_in_actor(*args, **kwargs)
@ -318,8 +330,8 @@ async def test_nested_multierrors(loglevel, start_method):
async with tractor.open_nursery() as nursery:
for i in range(subactor_breadth):
await nursery.run_in_actor(
f'spawner_{i}',
spawn_and_error,
name=f'spawner_{i}',
breadth=subactor_breadth,
depth=depth,
)
@ -398,7 +410,10 @@ def test_cancel_via_SIGINT_other_task(
async def spawn_and_sleep_forever(task_status=trio.TASK_STATUS_IGNORED):
async with tractor.open_nursery() as tn:
for i in range(3):
await tn.run_in_actor('sucka', sleep_forever)
await tn.run_in_actor(
sleep_forever,
name='namesucka',
)
task_status.started()
await trio.sleep_forever()
@ -423,7 +438,10 @@ async def spin_for(period=3):
async def spawn():
async with tractor.open_nursery() as tn:
portal = await tn.run_in_actor('sleeper', spin_for)
portal = await tn.run_in_actor(
spin_for,
name='sleeper',
)
@no_windows
@ -442,7 +460,10 @@ def test_cancel_while_childs_child_in_sync_sleep(
async def main():
with trio.fail_after(2):
async with tractor.open_nursery() as tn:
portal = await tn.run_in_actor('spawn', spawn)
portal = await tn.run_in_actor(
spawn,
name='spawn',
)
await trio.sleep(1)
assert 0

13
tests/test_debugger.py
View File

@ -237,7 +237,7 @@ def test_multi_subactors(spawn):
child.expect(r"\(Pdb\+\+\)")
before = str(child.before.decode())
assert "Attaching pdb to actor: ('bp_forever'" in before
assert "Attaching pdb to actor: ('breakpoint_forever'" in before
# do some "next" commands to demonstrate recurrent breakpoint
# entries
@ -265,7 +265,7 @@ def test_multi_subactors(spawn):
child.sendline('c')
child.expect(r"\(Pdb\+\+\)")
before = str(child.before.decode())
assert "Attaching pdb to actor: ('bp_forever'" in before
assert "Attaching pdb to actor: ('breakpoint_forever'" in before
# now run some "continues" to show re-entries
for _ in range(5):
@ -277,7 +277,7 @@ def test_multi_subactors(spawn):
child.expect(r"\(Pdb\+\+\)")
before = str(child.before.decode())
assert "Attaching to pdb in crashed actor: ('arbiter'" in before
assert "RemoteActorError: ('bp_forever'" in before
assert "RemoteActorError: ('breakpoint_forever'" in before
assert 'bdb.BdbQuit' in before
# process should exit
@ -285,7 +285,7 @@ def test_multi_subactors(spawn):
child.expect(pexpect.EOF)
before = str(child.before.decode())
assert "RemoteActorError: ('bp_forever'" in before
assert "RemoteActorError: ('breakpoint_forever'" in before
assert 'bdb.BdbQuit' in before
@ -391,8 +391,9 @@ def test_multi_nested_subactors_error_through_nurseries(spawn):
child.expect(pexpect.EOF)
before = str(child.before.decode())
assert "NameError" in before
if not timed_out_early:
before = str(child.before.decode())
assert "NameError" in before
def test_root_nursery_cancels_before_child_releases_tty_lock(spawn, start_method):

20
tests/test_discovery.py
View File

@ -74,14 +74,14 @@ async def test_trynamic_trio(func, start_method):
print("Alright... Action!")
donny = await n.run_in_actor(
'donny',
func,
other_actor='gretchen',
name='donny',
)
gretchen = await n.run_in_actor(
'gretchen',
func,
other_actor='donny',
name='gretchen',
)
print(await gretchen.result())
print(await donny.result())
@ -124,12 +124,15 @@ async def spawn_and_check_registry(
assert not actor.is_arbiter
async with tractor.get_arbiter(*arb_addr) as portal:
if actor.is_arbiter:
async def get_reg():
return actor._registry
extra = 1 # arbiter is local root actor
else:
get_reg = partial(portal.run, 'self', 'get_registry')
get_reg = partial(portal.run_from_ns, 'self', 'get_registry')
extra = 2 # local root actor + remote arbiter
# ensure current actor is registered
@ -147,7 +150,7 @@ async def spawn_and_check_registry(
portals = {}
for i in range(3):
name = f'a{i}'
portals[name] = await n.run_in_actor(name, to_run)
portals[name] = await n.run_in_actor(to_run, name=name)
# wait on last actor to come up
async with tractor.wait_for_actor(name):
@ -254,14 +257,17 @@ async def close_chans_before_nursery(
async with tractor.get_arbiter(*arb_addr) as aportal:
try:
get_reg = partial(aportal.run, 'self', 'get_registry')
get_reg = partial(aportal.run_from_ns, 'self', 'get_registry')
async with tractor.open_nursery() as tn:
portal1 = await tn.run_in_actor('consumer1', stream_forever)
portal1 = await tn.run_in_actor(
stream_forever,
name='consumer1',
)
agen1 = await portal1.result()
portal2 = await tn.start_actor('consumer2', rpc_module_paths=[__name__])
agen2 = await portal2.run(__name__, 'stream_forever')
agen2 = await portal2.run(stream_forever)
async with trio.open_nursery() as n:
n.start_soon(streamer, agen1)

2
tests/test_local.py
View File

@ -46,7 +46,7 @@ async def test_self_is_registered_localportal(arb_addr):
assert actor.is_arbiter
async with tractor.get_arbiter(*arb_addr) as portal:
assert isinstance(portal, tractor._portal.LocalPortal)
sockaddr = await portal.run('self', 'wait_for_actor', name='arbiter')
sockaddr = await portal.run_from_ns('self', 'wait_for_actor', name='arbiter')
assert sockaddr[0] == arb_addr

41
tests/test_pubsub.py
View File

@ -28,15 +28,19 @@ def is_even(i):
return i % 2 == 0
# placeholder for topics getter
_get_topics = None
@tractor.msg.pub
async def pubber(get_topics, seed=10):
ss = tractor.current_actor().statespace
# ensure topic subscriptions are as expected
global _get_topics
_get_topics = get_topics
for i in cycle(range(seed)):
# ensure topic subscriptions are as expected
ss['get_topics'] = get_topics
yield {'even' if is_even(i) else 'odd': i}
await trio.sleep(0.1)
@ -58,7 +62,7 @@ async def subs(
async with tractor.find_actor(pub_actor_name) as portal:
stream = await portal.run(
__name__, 'pubber',
pubber,
topics=which,
seed=seed,
)
@ -76,7 +80,7 @@ async def subs(
await stream.aclose()
stream = await portal.run(
__name__, 'pubber',
pubber,
topics=['odd'],
seed=seed,
)
@ -126,7 +130,10 @@ async def test_required_args(callwith_expecterror):
async with tractor.open_nursery() as n:
# await func(**kwargs)
portal = await n.run_in_actor(
'pubber', multilock_pubber, **kwargs)
multilock_pubber,
name='pubber',
**kwargs
)
async with tractor.wait_for_actor('pubber'):
pass
@ -148,8 +155,9 @@ def test_multi_actor_subs_arbiter_pub(
):
"""Try out the neato @pub decorator system.
"""
global _get_topics
async def main():
ss = tractor.current_actor().statespace
async with tractor.open_nursery() as n:
@ -163,20 +171,29 @@ def test_multi_actor_subs_arbiter_pub(
)
even_portal = await n.run_in_actor(
'evens', subs, which=['even'], pub_actor_name=name)
subs,
which=['even'],
name='evens',
pub_actor_name=name
)
odd_portal = await n.run_in_actor(
'odds', subs, which=['odd'], pub_actor_name=name)
subs,
which=['odd'],
name='odds',
pub_actor_name=name
)
async with tractor.wait_for_actor('evens'):
# block until 2nd actor is initialized
pass
if pub_actor == 'arbiter':
# wait for publisher task to be spawned in a local RPC task
while not ss.get('get_topics'):
while _get_topics is None:
await trio.sleep(0.1)
get_topics = ss.get('get_topics')
get_topics = _get_topics
assert 'even' in get_topics()

4
tests/test_rpc.py
View File

@ -80,9 +80,11 @@ def test_rpc_errors(arb_addr, to_call, testdir):
# spawn a subactor which calls us back
async with tractor.open_nursery() as n:
await n.run_in_actor(
'subactor',
sleep_back_actor,
actor_name=subactor_requests_to,
name='subactor',
# function from the local exposed module space
# the subactor will invoke when it RPCs back to this actor
func_name=funcname,

25
tests/test_spawning.py
View File

@ -1,31 +1,33 @@
"""
Spawning basics
"""
from functools import partial
import pytest
import trio
import tractor
from conftest import tractor_test
statespace = {'doggy': 10, 'kitty': 4}
data_to_pass_down = {'doggy': 10, 'kitty': 4}
async def spawn(is_arbiter):
async def spawn(is_arbiter, data):
namespaces = [__name__]
await trio.sleep(0.1)
actor = tractor.current_actor()
assert actor.is_arbiter == is_arbiter
assert actor.statespace == statespace
data == data_to_pass_down
if actor.is_arbiter:
async with tractor.open_nursery() as nursery:
# forks here
portal = await nursery.run_in_actor(
'sub-actor',
spawn,
is_arbiter=False,
statespace=statespace,
name='sub-actor',
data=data,
rpc_module_paths=namespaces,
)
@ -41,10 +43,9 @@ async def spawn(is_arbiter):
def test_local_arbiter_subactor_global_state(arb_addr):
result = tractor.run(
spawn,
partial(spawn, data=data_to_pass_down),
True,
name='arbiter',
statespace=statespace,
arbiter_addr=arb_addr,
)
assert result == 10
@ -69,9 +70,9 @@ async def test_movie_theatre_convo(start_method):
rpc_module_paths=[__name__],
)
print(await portal.run(__name__, 'movie_theatre_question'))
print(await portal.run(movie_theatre_question))
# call the subactor a 2nd time
print(await portal.run(__name__, 'movie_theatre_question'))
print(await portal.run(movie_theatre_question))
# the async with will block here indefinitely waiting
# for our actor "frank" to complete, we cancel 'frank'
@ -89,7 +90,10 @@ async def test_most_beautiful_word(start_method):
"""
async with tractor.open_nursery() as n:
portal = await n.run_in_actor('some_linguist', cellar_door)
portal = await n.run_in_actor(
cellar_door,
name='some_linguist',
)
# The ``async with`` will unblock here since the 'some_linguist'
# actor has completed its main task ``cellar_door``.
@ -119,7 +123,6 @@ def test_loglevel_propagated_to_subactor(
async def main():
async with tractor.open_nursery() as tn:
await tn.run_in_actor(
'log_checker',
check_loglevel,
level=level,
)

14
tests/test_streaming.py
View File

@ -50,7 +50,7 @@ async def context_stream(ctx, sequence):
assert cs.cancelled_caught
async def stream_from_single_subactor(stream_func_name):
async def stream_from_single_subactor(stream_func):
"""Verify we can spawn a daemon actor and retrieve streamed data.
"""
async with tractor.find_actor('streamerd') as portals:
@ -62,14 +62,12 @@ async def stream_from_single_subactor(stream_func_name):
portal = await nursery.start_actor(
'streamerd',
rpc_module_paths=[__name__],
statespace={'global_dict': {}},
)
seq = range(10)
stream = await portal.run(
__name__,
stream_func_name, # one of the funcs above
stream_func, # one of the funcs above
sequence=list(seq), # has to be msgpack serializable
)
# it'd sure be nice to have an asyncitertools here...
@ -97,7 +95,7 @@ async def stream_from_single_subactor(stream_func_name):
@pytest.mark.parametrize(
'stream_func', ['async_gen_stream', 'context_stream']
'stream_func', [async_gen_stream, context_stream]
)
def test_stream_from_single_subactor(arb_addr, start_method, stream_func):
"""Verify streaming from a spawned async generator.
@ -105,7 +103,7 @@ def test_stream_from_single_subactor(arb_addr, start_method, stream_func):
tractor.run(
partial(
stream_from_single_subactor,
stream_func_name=stream_func,
stream_func=stream_func,
),
arbiter_addr=arb_addr,
start_method=start_method,
@ -186,9 +184,9 @@ async def a_quadruple_example():
pre_start = time.time()
portal = await nursery.run_in_actor(
'aggregator',
aggregate,
seed=seed,
name='aggregator',
)
start = time.time()
@ -275,9 +273,9 @@ async def test_respawn_consumer_task(
async with tractor.open_nursery() as n:
stream = await(await n.run_in_actor(
'streamer',
stream_data,
seed=11,
name='streamer',
)).result()
expect = set(range(11))

2
tractor/__init__.py
View File

@ -16,7 +16,7 @@ from ._streaming import Context, stream
from ._discovery import get_arbiter, find_actor, wait_for_actor
from ._actor import Actor, _start_actor, Arbiter
from ._trionics import open_nursery
from ._state import current_actor
from ._state import current_actor, is_root_process
from . import _state
from ._exceptions import RemoteActorError, ModuleNotExposed
from ._debug import breakpoint, post_mortem

24
tractor/_actor.py
View File

@ -126,10 +126,17 @@ async def _invoke(
with cancel_scope as cs:
task_status.started(cs)
await chan.send({'return': await coro, 'cid': cid})
except (Exception, trio.MultiError) as err:
# NOTE: don't enter debug mode recursively after quitting pdb
log.exception("Actor crashed:")
await _debug._maybe_enter_pm(err)
if not isinstance(err, trio.ClosedResourceError):
log.exception("Actor crashed:")
# XXX: is there any case where we'll want to debug IPC
# disconnects? I can't think of a reason that inspecting
# this type of failure will be useful for respawns or
# recovery logic - the only case is some kind of strange bug
# in `trio` itself?
await _debug._maybe_enter_pm(err)
# always ship errors back to caller
err_msg = pack_error(err)
@ -187,7 +194,6 @@ class Actor:
name: str,
*,
rpc_module_paths: List[str] = [],
statespace: Optional[Dict[str, Any]] = None,
uid: str = None,
loglevel: str = None,
arbiter_addr: Optional[Tuple[str, int]] = None,
@ -219,7 +225,6 @@ class Actor:
# TODO: consider making this a dynamically defined
# @dataclass once we get py3.7
self.statespace = statespace or {}
self.loglevel = loglevel
self._arb_addr = arbiter_addr
@ -705,7 +710,7 @@ class Actor:
assert isinstance(self._arb_addr, tuple)
async with get_arbiter(*self._arb_addr) as arb_portal:
await arb_portal.run(
await arb_portal.run_from_ns(
'self',
'register_actor',
uid=self.uid,
@ -781,8 +786,11 @@ class Actor:
cs.shield = True
try:
async with get_arbiter(*self._arb_addr) as arb_portal:
await arb_portal.run(
'self', 'unregister_actor', uid=self.uid)
await arb_portal.run_from_ns(
'self',
'unregister_actor',
uid=self.uid
)
except OSError:
failed = True
if cs.cancelled_caught:

13
tractor/_debug.py
View File

@ -180,15 +180,14 @@ def _breakpoint(debug_func) -> Awaitable[None]:
try:
async with get_root() as portal:
with trio.fail_after(.5):
agen = await portal.run(
'tractor._debug',
'_hijack_stdin_relay_to_child',
stream = await portal.run(
tractor._debug._hijack_stdin_relay_to_child,
subactor_uid=actor.uid,
)
async with aclosing(agen):
async with aclosing(stream):
# block until first yield above
async for val in agen:
async for val in stream:
assert val == 'Locked'
task_status.started()
@ -305,6 +304,10 @@ post_mortem = partial(
async def _maybe_enter_pm(err):
if (
_state.debug_mode()
# NOTE: don't enter debug mode recursively after quitting pdb
# Iow, don't re-enter the repl if the `quit` command was issued
# by the user.
and not isinstance(err, bdb.BdbQuit)
# XXX: if the error is the likely result of runtime-wide

4
tractor/_discovery.py
View File

@ -60,7 +60,7 @@ async def find_actor(
"""
actor = current_actor()
async with get_arbiter(*arbiter_sockaddr or actor._arb_addr) as arb_portal:
sockaddr = await arb_portal.run('self', 'find_actor', name=name)
sockaddr = await arb_portal.run_from_ns('self', 'find_actor', name=name)
# TODO: return portals to all available actors - for now just
# the last one that registered
if name == 'arbiter' and actor.is_arbiter:
@ -84,7 +84,7 @@ async def wait_for_actor(
"""
actor = current_actor()
async with get_arbiter(*arbiter_sockaddr or actor._arb_addr) as arb_portal:
sockaddrs = await arb_portal.run('self', 'wait_for_actor', name=name)
sockaddrs = await arb_portal.run_from_ns('self', 'wait_for_actor', name=name)
sockaddr = sockaddrs[-1]
async with _connect_chan(*sockaddr) as chan:
async with open_portal(chan) as portal:

71
tractor/_portal.py
View File

@ -8,6 +8,7 @@ from typing import Tuple, Any, Dict, Optional, Set, Iterator
from functools import partial
from dataclasses import dataclass
from contextlib import contextmanager
import warnings
import trio
from async_generator import asynccontextmanager
@ -119,7 +120,7 @@ class ReceiveStream(trio.abc.ReceiveChannel):
# 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('self', '_cancel_task', cid=cid)
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
@ -197,15 +198,59 @@ class Portal:
"A pending main result has already been submitted"
self._expect_result = await self._submit(ns, func, kwargs)
async def run(self, ns: str, func: str, **kwargs) -> Any:
async def run(
self,
func_or_ns: str,
fn_name: Optional[str] = None,
**kwargs
) -> Any:
"""Submit a remote function to be scheduled and run by actor,
wrap and return its (stream of) result(s).
This is a blocking call and returns either a value from the
remote rpc task or a local async generator instance.
"""
if isinstance(func_or_ns, str):
warnings.warn(
"`Portal.run(namespace: str, funcname: str)` is now"
"deprecated, pass a function reference directly instead\n"
"If you still want to run a remote function by name use"
"`Portal.run_from_ns()`",
DeprecationWarning,
stacklevel=2,
)
fn_mod_path = func_or_ns
assert isinstance(fn_name, str)
else: # function reference was passed directly
fn = func_or_ns
fn_mod_path = fn.__module__
fn_name = fn.__name__
return await self._return_from_resptype(
*(await self._submit(ns, func, kwargs))
*(await self._submit(fn_mod_path, fn_name, kwargs))
)
async def run_from_ns(
self,
namespace_path: str,
function_name: str,
**kwargs,
) -> Any:
"""Run a function from a (remote) namespace in a new task on the far-end actor.
This is a more explitcit way to run tasks in a remote-process
actor using explicit object-path syntax. Hint: this is how
`.run()` works underneath.
Note::
A special namespace `self` can be used to invoke `Actor`
instance methods in the remote runtime. Currently this should only
be used for `tractor` internals.
"""
return await self._return_from_resptype(
*(await self._submit(namespace_path, function_name, kwargs))
)
async def _return_from_resptype(
@ -274,7 +319,14 @@ class Portal:
log.warning(
f"Cancelling all streams with {self.channel.uid}")
for stream in self._streams.copy():
await stream.aclose()
try:
await stream.aclose()
except trio.ClosedResourceError:
# don't error the stream having already been closed
# (unless of course at some point down the road we
# won't expect this to always be the case or need to
# detect it for respawning purposes?)
log.debug(f"{stream} was already closed.")
async def aclose(self):
log.debug(f"Closing {self}")
@ -302,13 +354,16 @@ class Portal:
# with trio.CancelScope(shield=True) as cancel_scope:
with trio.move_on_after(0.5) as cancel_scope:
cancel_scope.shield = True
await self.run('self', 'cancel')
await self.run_from_ns('self', 'cancel')
return True
if cancel_scope.cancelled_caught:
log.warning(f"May have failed to cancel {self.channel.uid}")
# if we get here some weird cancellation case happened
return False
except trio.ClosedResourceError:
log.warning(
f"{self.channel} for {self.channel.uid} was already closed?")
@ -325,8 +380,10 @@ class LocalPortal:
actor: 'Actor' # type: ignore # noqa
channel: Channel
async def run(self, ns: str, func_name: str, **kwargs) -> Any:
"""Run a requested function locally and return it's result.
async def run_from_ns(self, ns: str, func_name: str, **kwargs) -> Any:
"""Run a requested local function from a namespace path and
return it's result.
"""
obj = self.actor if ns == 'self' else importlib.import_module(ns)
func = getattr(obj, func_name)

1
tractor/_spawn.py
View File

@ -248,7 +248,6 @@ async def new_proc(
await chan.send({
"_parent_main_data": subactor._parent_main_data,
"rpc_module_paths": subactor.rpc_module_paths,
"statespace": subactor.statespace,
"_arb_addr": subactor._arb_addr,
"bind_host": bind_addr[0],
"bind_port": bind_addr[1],

11
tractor/_trionics.py
View File

@ -52,7 +52,6 @@ class ActorNursery:
name: str,
*,
bind_addr: Tuple[str, int] = _default_bind_addr,
statespace: Optional[Dict[str, Any]] = None,
rpc_module_paths: List[str] = None,
loglevel: str = None, # set log level per subactor
nursery: trio.Nursery = None,
@ -67,7 +66,6 @@ class ActorNursery:
name,
# modules allowed to invoked funcs from
rpc_module_paths=rpc_module_paths or [],
statespace=statespace, # global proc state vars
loglevel=loglevel,
arbiter_addr=current_actor()._arb_addr,
)
@ -94,12 +92,11 @@ class ActorNursery:
async def run_in_actor(
self,
name: str,
fn: typing.Callable,
*,
name: Optional[str] = None,
bind_addr: Tuple[str, int] = _default_bind_addr,
rpc_module_paths: Optional[List[str]] = None,
statespace: Dict[str, Any] = None,
loglevel: str = None, # set log level per subactor
**kwargs, # explicit args to ``fn``
) -> Portal:
@ -111,11 +108,15 @@ class ActorNursery:
the actor is terminated.
"""
mod_path = fn.__module__
if name is None:
# use the explicit function name if not provided
name = fn.__name__
portal = await self.start_actor(
name,
rpc_module_paths=[mod_path] + (rpc_module_paths or []),
bind_addr=bind_addr,
statespace=statespace,
loglevel=loglevel,
# use the run_in_actor nursery
nursery=self._ria_nursery,

11
tractor/msg.py
View File

@ -90,6 +90,9 @@ def modify_subs(topics2ctxs, topics, ctx):
topics2ctxs.pop(topic)
_pub_state: Dict[str, dict] = {}
def pub(
wrapped: typing.Callable = None,
*,
@ -175,12 +178,15 @@ def pub(
subscribers. If you are ok to have a new task running for every call
to ``pub_service()`` then probably don't need this.
"""
global _pub_state
# handle the decorator not called with () case
if wrapped is None:
return partial(pub, tasks=tasks)
task2lock: Dict[Union[str, None], trio.StrictFIFOLock] = {
None: trio.StrictFIFOLock()}
for name in tasks:
task2lock[name] = trio.StrictFIFOLock()
@ -203,11 +209,10 @@ def pub(
f"argument with a falue from {tasks}")
topics = set(topics)
ss = current_actor().statespace
lockmap = ss.setdefault('_pubtask2lock', task2lock)
lockmap = _pub_state.setdefault('_pubtask2lock', task2lock)
lock = lockmap[task_name]
all_subs = ss.setdefault('_subs', {})
all_subs = _pub_state.setdefault('_subs', {})
topics2ctxs = all_subs.setdefault(task_name, {})
try: