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tractor
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WIP trying out trio_run_in_process

try_trip^2
Tyler Goodlet 2019-11-26 09:23:37 -05:00
parent 7c0efce84b
commit 1b7cdfe512
3 changed files with 113 additions and 53 deletions
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39
tractor/_actor.py
View File

@ -225,10 +225,20 @@ class Actor:
the original nursery we need to try and load the local module
code (if it exists).
"""
try:
for path in self.rpc_module_paths:
log.debug(f"Attempting to import {path}")
self._mods[path] = importlib.import_module(path)
# if self.name != 'arbiter':
# importlib.import_module('doggy')
# from celery.contrib import rdb; rdb.set_trace()
except ModuleNotFoundError:
# it is expected the corresponding `ModuleNotExposed` error
# will be raised later
log.error(f"Failed to import {path} in {self.name}")
raise
def _get_rpc_func(self, ns, funcname):
try:
return getattr(self._mods[ns], funcname)
@ -488,7 +498,7 @@ class Actor:
f"Exiting msg loop for {chan} from {chan.uid} "
f"with last msg:\n{msg}")
def _fork_main(
def _mp_main(
self,
accept_addr: Tuple[str, int],
forkserver_info: Tuple[Any, Any, Any, Any, Any],
@ -500,13 +510,17 @@ class Actor:
self._forkserver_info = forkserver_info
from ._spawn import try_set_start_method
spawn_ctx = try_set_start_method(start_method)
if self.loglevel is not None:
log.info(
f"Setting loglevel for {self.uid} to {self.loglevel}")
get_console_log(self.loglevel)
log.info(
f"Started new {spawn_ctx.current_process()} for {self.uid}")
_state._current_actor = self
log.debug(f"parent_addr is {parent_addr}")
try:
trio.run(partial(
@ -515,6 +529,21 @@ class Actor:
pass # handle it the same way trio does?
log.info(f"Actor {self.uid} terminated")
async def _trip_main(
self,
accept_addr: Tuple[str, int],
parent_addr: Tuple[str, int] = None
) -> None:
if self.loglevel is not None:
log.info(
f"Setting loglevel for {self.uid} to {self.loglevel}")
get_console_log(self.loglevel)
log.info(f"Started new TRIP process for {self.uid}")
_state._current_actor = self
await self._async_main(accept_addr, parent_addr=parent_addr)
log.info(f"Actor {self.uid} terminated")
async def _async_main(
self,
accept_addr: Tuple[str, int],
@ -584,6 +613,8 @@ class Actor:
# blocks here as expected until the channel server is
# killed (i.e. this actor is cancelled or signalled by the parent)
except Exception as err:
# if self.name == 'arbiter':
# import pdb; pdb.set_trace()
if not registered_with_arbiter:
log.exception(
f"Actor errored and failed to register with arbiter "
@ -598,12 +629,18 @@ class Actor:
f"Failed to ship error to parent "
f"{self._parent_chan.uid}, channel was closed")
log.exception("Actor errored:")
if isinstance(err, ModuleNotFoundError):
raise
else:
# XXX wait, why?
# causes a hang if I always raise..
# A parent process does something weird here?
raise
finally:
# if self.name == 'arbiter':
# import pdb; pdb.set_trace()
if registered_with_arbiter:
await self._do_unreg(arbiter_addr)
# terminate actor once all it's peers (actors that connected

20
tractor/_spawn.py
View File

@ -5,6 +5,8 @@ Mostly just wrapping around ``multiprocessing``.
"""
import multiprocessing as mp
import trio_run_in_process
try:
from multiprocessing import semaphore_tracker # type: ignore
resource_tracker = semaphore_tracker
@ -55,16 +57,28 @@ def is_main_process() -> bool:
return mp.current_process().name == 'MainProcess'
def new_proc(
async def new_proc(
name: str,
actor: Actor,
# passed through to actor main
bind_addr: Tuple[str, int],
parent_addr: Tuple[str, int],
use_trip: bool = True,
) -> mp.Process:
"""Create a new ``multiprocessing.Process`` using the
spawn method as configured using ``try_set_start_method()``.
"""
if use_trip: # trio_run_in_process
mng = trio_run_in_process.open_in_process(
actor._trip_main,
bind_addr,
parent_addr
)
proc = await mng.__aenter__()
proc.mng = mng
return proc
else:
# use multiprocessing
start_method = _ctx.get_start_method()
if start_method == 'forkserver':
# XXX do our hackery on the stdlib to avoid multiple
@ -95,8 +109,8 @@ def new_proc(
else:
fs_info = (None, None, None, None, None)
return _ctx.Process( # type: ignore
target=actor._fork_main,
return _ctx.Process(
target=actor._mp_main,
args=(
bind_addr,
fs_info,

15
tractor/_trionics.py
View File

@ -9,6 +9,7 @@ import typing
import trio
from async_generator import asynccontextmanager, aclosing
import trio_run_in_process
from ._state import current_actor
from .log import get_logger, get_loglevel
@ -64,17 +65,20 @@ class ActorNursery:
arbiter_addr=current_actor()._arb_addr,
)
parent_addr = self._actor.accept_addr
proc = _spawn.new_proc(
assert parent_addr
proc = await _spawn.new_proc(
name,
actor,
bind_addr,
parent_addr,
)
# `multiprocessing` only (since no async interface):
# register the process before start in case we get a cancel
# request before the actor has fully spawned - then we can wait
# for it to fully come up before sending a cancel request
self._children[actor.uid] = (actor, proc, None)
if not isinstance(proc, trio_run_in_process.process.Process):
proc.start()
if not proc.is_alive():
raise ActorFailure("Couldn't start sub-actor?")
@ -193,12 +197,17 @@ class ActorNursery:
actor: Actor,
cancel_scope: Optional[trio.CancelScope] = None,
) -> None:
# please god don't hang
if not isinstance(proc, trio_run_in_process.process.Process):
# TODO: timeout block here?
if proc.is_alive():
await proc_waiter(proc)
# please god don't hang
proc.join()
else:
# trio_run_in_process blocking wait
await proc.mng.__aexit__(None, None, None)
# proc.nursery.cancel_scope.cancel()
log.debug(f"Joined {proc}")
# indicate we are no longer managing this subactor
self._children.pop(actor.uid)