forked from goodboy/tractor
Make `async_main()` a module func
Tyler Goodlet
parent
a3a5bc267e
commit
208d56af2c
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@ -20,13 +20,13 @@ Sub-process entry points.
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"""
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"""
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from functools import partial
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from functools import partial
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from typing import Tuple, Any
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from typing import Tuple, Any
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import signal
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import trio # type: ignore
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import trio # type: ignore
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from .log import get_console_log, get_logger
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from .log import get_console_log, get_logger
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from . import _state
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from . import _state
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from .to_asyncio import run_as_asyncio_guest
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from .to_asyncio import run_as_asyncio_guest
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from ._runtime import async_main, Actor
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log = get_logger(__name__)
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log = get_logger(__name__)
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@ -63,7 +63,8 @@ def _mp_main(
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log.debug(f"parent_addr is {parent_addr}")
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log.debug(f"parent_addr is {parent_addr}")
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trio_main = partial(
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trio_main = partial(
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actor._async_main,
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async_main,
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actor,
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accept_addr,
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accept_addr,
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parent_addr=parent_addr
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parent_addr=parent_addr
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)
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)
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@ -82,7 +83,7 @@ def _mp_main(
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def _trio_main(
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def _trio_main(
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actor: 'Actor', # type: ignore
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actor: Actor, # type: ignore
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*,
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*,
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parent_addr: Tuple[str, int] = None,
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parent_addr: Tuple[str, int] = None,
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infect_asyncio: bool = False,
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infect_asyncio: bool = False,
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@ -106,7 +107,8 @@ def _trio_main(
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log.debug(f"parent_addr is {parent_addr}")
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log.debug(f"parent_addr is {parent_addr}")
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trio_main = partial(
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trio_main = partial(
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actor._async_main,
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async_main,
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actor,
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parent_addr=parent_addr
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parent_addr=parent_addr
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)
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)
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@ -29,7 +29,7 @@ import warnings
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import trio
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import trio
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from ._runtime import Actor, Arbiter
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from ._runtime import Actor, Arbiter, async_main
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from . import _debug
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from . import _debug
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from . import _spawn
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from . import _spawn
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from . import _state
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from . import _state
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@ -188,13 +188,14 @@ async def open_root_actor(
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# start the actor runtime in a new task
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# start the actor runtime in a new task
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async with trio.open_nursery() as nursery:
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async with trio.open_nursery() as nursery:
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# ``Actor._async_main()`` creates an internal nursery and
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# ``_runtime.async_main()`` creates an internal nursery and
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# thus blocks here until the entire underlying actor tree has
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# thus blocks here until the entire underlying actor tree has
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# terminated thereby conducting structured concurrency.
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# terminated thereby conducting structured concurrency.
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await nursery.start(
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await nursery.start(
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partial(
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partial(
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actor._async_main,
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async_main,
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actor,
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accept_addr=(host, port),
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accept_addr=(host, port),
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parent_addr=None
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parent_addr=None
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)
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)
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@ -391,7 +391,7 @@ class Actor:
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is_arbiter: bool = False
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is_arbiter: bool = False
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msg_buffer_size: int = 2**6
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msg_buffer_size: int = 2**6
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# nursery placeholders filled in by `_async_main()` after fork
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# nursery placeholders filled in by `async_main()` after fork
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_root_n: Optional[trio.Nursery] = None
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_root_n: Optional[trio.Nursery] = None
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_service_n: Optional[trio.Nursery] = None
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_service_n: Optional[trio.Nursery] = None
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_server_n: Optional[trio.Nursery] = None
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_server_n: Optional[trio.Nursery] = None
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@ -940,199 +940,6 @@ class Actor:
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await self.cancel()
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await self.cancel()
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raise
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raise
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async def _async_main(
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self,
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accept_addr: Optional[tuple[str, int]] = None,
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# XXX: currently ``parent_addr`` is only needed for the
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# ``multiprocessing`` backend (which pickles state sent to
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# the child instead of relaying it over the connect-back
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# channel). Once that backend is removed we can likely just
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# change this to a simple ``is_subactor: bool`` which will
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# be False when running as root actor and True when as
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# a subactor.
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parent_addr: Optional[tuple[str, int]] = None,
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task_status: TaskStatus[None] = trio.TASK_STATUS_IGNORED,
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) -> None:
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"""
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Start the channel server, maybe connect back to the parent, and
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start the main task.
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A "root-most" (or "top-level") nursery for this actor is opened here
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and when cancelled effectively cancels the actor.
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"""
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registered_with_arbiter = False
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try:
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# establish primary connection with immediate parent
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self._parent_chan = None
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if parent_addr is not None:
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self._parent_chan, accept_addr_rent = await self._from_parent(
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parent_addr)
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# either it's passed in because we're not a child
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# or because we're running in mp mode
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if accept_addr_rent is not None:
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accept_addr = accept_addr_rent
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# load exposed/allowed RPC modules
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# XXX: do this **after** establishing a channel to the parent
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# but **before** starting the message loop for that channel
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# such that import errors are properly propagated upwards
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self.load_modules()
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# The "root" nursery ensures the channel with the immediate
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# parent is kept alive as a resilient service until
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# cancellation steps have (mostly) occurred in
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# a deterministic way.
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async with trio.open_nursery() as root_nursery:
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self._root_n = root_nursery
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assert self._root_n
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async with trio.open_nursery() as service_nursery:
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# This nursery is used to handle all inbound
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# connections to us such that if the TCP server
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# is killed, connections can continue to process
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# in the background until this nursery is cancelled.
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self._service_n = service_nursery
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assert self._service_n
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# Startup up the channel server with,
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# - subactor: the bind address is sent by our parent
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# over our established channel
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# - root actor: the ``accept_addr`` passed to this method
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assert accept_addr
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host, port = accept_addr
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self._server_n = await service_nursery.start(
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partial(
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self._serve_forever,
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service_nursery,
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accept_host=host,
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accept_port=port
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)
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)
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accept_addr = self.accept_addr
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if _state._runtime_vars['_is_root']:
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_state._runtime_vars['_root_mailbox'] = accept_addr
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# Register with the arbiter if we're told its addr
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log.runtime(f"Registering {self} for role `{self.name}`")
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assert isinstance(self._arb_addr, tuple)
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async with get_arbiter(*self._arb_addr) as arb_portal:
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await arb_portal.run_from_ns(
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'self',
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'register_actor',
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uid=self.uid,
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sockaddr=accept_addr,
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)
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registered_with_arbiter = True
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# init steps complete
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task_status.started()
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# Begin handling our new connection back to our
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# parent. This is done last since we don't want to
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# start processing parent requests until our channel
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# server is 100% up and running.
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if self._parent_chan:
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await root_nursery.start(
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partial(
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process_messages,
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self,
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self._parent_chan,
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shield=True,
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)
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)
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log.runtime("Waiting on service nursery to complete")
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log.runtime("Service nursery complete")
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log.runtime("Waiting on root nursery to complete")
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# Blocks here as expected until the root nursery is
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# killed (i.e. this actor is cancelled or signalled by the parent)
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except Exception as err:
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log.info("Closing all actor lifetime contexts")
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_lifetime_stack.close()
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if not registered_with_arbiter:
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# TODO: I guess we could try to connect back
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# to the parent through a channel and engage a debugger
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# once we have that all working with std streams locking?
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log.exception(
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f"Actor errored and failed to register with arbiter "
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f"@ {self._arb_addr}?")
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log.error(
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"\n\n\t^^^ THIS IS PROBABLY A TRACTOR BUGGGGG!!! ^^^\n"
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"\tCALMLY CALL THE AUTHORITIES AND HIDE YOUR CHILDREN.\n\n"
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"\tYOUR PARENT CODE IS GOING TO KEEP WORKING FINE!!!\n"
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"\tTHIS IS HOW RELIABlE SYSTEMS ARE SUPPOSED TO WORK!?!?\n"
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)
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if self._parent_chan:
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await try_ship_error_to_parent(self._parent_chan, err)
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# always!
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log.exception("Actor errored:")
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raise
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finally:
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log.info("Runtime nursery complete")
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# tear down all lifetime contexts if not in guest mode
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# XXX: should this just be in the entrypoint?
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log.info("Closing all actor lifetime contexts")
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# TODO: we can't actually do this bc the debugger
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# uses the _service_n to spawn the lock task, BUT,
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# in theory if we had the root nursery surround this finally
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# block it might be actually possible to debug THIS
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# machinery in the same way as user task code?
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# if self.name == 'brokerd.ib':
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# with trio.CancelScope(shield=True):
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# await _debug.breakpoint()
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_lifetime_stack.close()
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# Unregister actor from the arbiter
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if registered_with_arbiter and (
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self._arb_addr is not None
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):
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failed = False
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with trio.move_on_after(0.5) as cs:
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cs.shield = True
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try:
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async with get_arbiter(*self._arb_addr) as arb_portal:
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await arb_portal.run_from_ns(
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'self',
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'unregister_actor',
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uid=self.uid
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)
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except OSError:
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failed = True
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if cs.cancelled_caught:
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failed = True
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if failed:
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log.warning(
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f"Failed to unregister {self.name} from arbiter")
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# Ensure all peers (actors connected to us as clients) are finished
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if not self._no_more_peers.is_set():
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if any(
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chan.connected() for chan in chain(*self._peers.values())
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):
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log.runtime(
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f"Waiting for remaining peers {self._peers} to clear")
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with trio.CancelScope(shield=True):
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await self._no_more_peers.wait()
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log.runtime("All peer channels are complete")
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log.runtime("Runtime completed")
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async def _serve_forever(
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async def _serve_forever(
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self,
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self,
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handler_nursery: trio.Nursery,
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handler_nursery: trio.Nursery,
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@ -1346,6 +1153,200 @@ class Actor:
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return self._infected_aio
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return self._infected_aio
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async def async_main(
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actor: Actor,
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accept_addr: Optional[tuple[str, int]] = None,
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# XXX: currently ``parent_addr`` is only needed for the
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# ``multiprocessing`` backend (which pickles state sent to
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# the child instead of relaying it over the connect-back
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# channel). Once that backend is removed we can likely just
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# change this to a simple ``is_subactor: bool`` which will
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# be False when running as root actor and True when as
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# a subactor.
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parent_addr: Optional[tuple[str, int]] = None,
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task_status: TaskStatus[None] = trio.TASK_STATUS_IGNORED,
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) -> None:
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'''
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Actor runtime entrypoint; start the IPC channel server, maybe connect
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back to the parent, and startup all core machinery tasks.
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A "root-most" (or "top-level") nursery for this actor is opened here
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and when cancelled effectively cancels the actor.
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'''
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registered_with_arbiter = False
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try:
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# establish primary connection with immediate parent
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actor._parent_chan = None
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if parent_addr is not None:
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actor._parent_chan, accept_addr_rent = await actor._from_parent(
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parent_addr)
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# either it's passed in because we're not a child
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# or because we're running in mp mode
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if accept_addr_rent is not None:
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accept_addr = accept_addr_rent
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# load exposed/allowed RPC modules
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# XXX: do this **after** establishing a channel to the parent
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# but **before** starting the message loop for that channel
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# such that import errors are properly propagated upwards
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actor.load_modules()
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# The "root" nursery ensures the channel with the immediate
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# parent is kept alive as a resilient service until
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# cancellation steps have (mostly) occurred in
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# a deterministic way.
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async with trio.open_nursery() as root_nursery:
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actor._root_n = root_nursery
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assert actor._root_n
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async with trio.open_nursery() as service_nursery:
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# This nursery is used to handle all inbound
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# connections to us such that if the TCP server
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# is killed, connections can continue to process
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# in the background until this nursery is cancelled.
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actor._service_n = service_nursery
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assert actor._service_n
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# Startup up the channel server with,
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# - subactor: the bind address is sent by our parent
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# over our established channel
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# - root actor: the ``accept_addr`` passed to this method
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assert accept_addr
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host, port = accept_addr
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actor._server_n = await service_nursery.start(
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partial(
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actor._serve_forever,
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service_nursery,
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accept_host=host,
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accept_port=port
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)
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)
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accept_addr = actor.accept_addr
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if _state._runtime_vars['_is_root']:
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_state._runtime_vars['_root_mailbox'] = accept_addr
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# Register with the arbiter if we're told its addr
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log.runtime(f"Registering {actor} for role `{actor.name}`")
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assert isinstance(actor._arb_addr, tuple)
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async with get_arbiter(*actor._arb_addr) as arb_portal:
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await arb_portal.run_from_ns(
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'self',
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'register_actor',
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uid=actor.uid,
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sockaddr=accept_addr,
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)
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registered_with_arbiter = True
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# init steps complete
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task_status.started()
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# Begin handling our new connection back to our
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|
# parent. This is done last since we don't want to
|
||||||
|
# start processing parent requests until our channel
|
||||||
|
# server is 100% up and running.
|
||||||
|
if actor._parent_chan:
|
||||||
|
await root_nursery.start(
|
||||||
|
partial(
|
||||||
|
process_messages,
|
||||||
|
actor,
|
||||||
|
actor._parent_chan,
|
||||||
|
shield=True,
|
||||||
|
)
|
||||||
|
)
|
||||||
|
log.runtime("Waiting on service nursery to complete")
|
||||||
|
log.runtime("Service nursery complete")
|
||||||
|
log.runtime("Waiting on root nursery to complete")
|
||||||
|
|
||||||
|
# Blocks here as expected until the root nursery is
|
||||||
|
# killed (i.e. this actor is cancelled or signalled by the parent)
|
||||||
|
except Exception as err:
|
||||||
|
log.info("Closing all actor lifetime contexts")
|
||||||
|
_lifetime_stack.close()
|
||||||
|
|
||||||
|
if not registered_with_arbiter:
|
||||||
|
# TODO: I guess we could try to connect back
|
||||||
|
# to the parent through a channel and engage a debugger
|
||||||
|
# once we have that all working with std streams locking?
|
||||||
|
log.exception(
|
||||||
|
f"Actor errored and failed to register with arbiter "
|
||||||
|
f"@ {actor._arb_addr}?")
|
||||||
|
log.error(
|
||||||
|
"\n\n\t^^^ THIS IS PROBABLY A TRACTOR BUGGGGG!!! ^^^\n"
|
||||||
|
"\tCALMLY CALL THE AUTHORITIES AND HIDE YOUR CHILDREN.\n\n"
|
||||||
|
"\tYOUR PARENT CODE IS GOING TO KEEP WORKING FINE!!!\n"
|
||||||
|
"\tTHIS IS HOW RELIABlE SYSTEMS ARE SUPPOSED TO WORK!?!?\n"
|
||||||
|
)
|
||||||
|
|
||||||
|
if actor._parent_chan:
|
||||||
|
await try_ship_error_to_parent(actor._parent_chan, err)
|
||||||
|
|
||||||
|
# always!
|
||||||
|
log.exception("Actor errored:")
|
||||||
|
raise
|
||||||
|
|
||||||
|
finally:
|
||||||
|
log.info("Runtime nursery complete")
|
||||||
|
|
||||||
|
# tear down all lifetime contexts if not in guest mode
|
||||||
|
# XXX: should this just be in the entrypoint?
|
||||||
|
log.info("Closing all actor lifetime contexts")
|
||||||
|
|
||||||
|
# TODO: we can't actually do this bc the debugger
|
||||||
|
# uses the _service_n to spawn the lock task, BUT,
|
||||||
|
# in theory if we had the root nursery surround this finally
|
||||||
|
# block it might be actually possible to debug THIS
|
||||||
|
# machinery in the same way as user task code?
|
||||||
|
# if actor.name == 'brokerd.ib':
|
||||||
|
# with trio.CancelScope(shield=True):
|
||||||
|
# await _debug.breakpoint()
|
||||||
|
|
||||||
|
_lifetime_stack.close()
|
||||||
|
|
||||||
|
# Unregister actor from the arbiter
|
||||||
|
if registered_with_arbiter and (
|
||||||
|
actor._arb_addr is not None
|
||||||
|
):
|
||||||
|
failed = False
|
||||||
|
with trio.move_on_after(0.5) as cs:
|
||||||
|
cs.shield = True
|
||||||
|
try:
|
||||||
|
async with get_arbiter(*actor._arb_addr) as arb_portal:
|
||||||
|
await arb_portal.run_from_ns(
|
||||||
|
'self',
|
||||||
|
'unregister_actor',
|
||||||
|
uid=actor.uid
|
||||||
|
)
|
||||||
|
except OSError:
|
||||||
|
failed = True
|
||||||
|
if cs.cancelled_caught:
|
||||||
|
failed = True
|
||||||
|
if failed:
|
||||||
|
log.warning(
|
||||||
|
f"Failed to unregister {actor.name} from arbiter")
|
||||||
|
|
||||||
|
# Ensure all peers (actors connected to us as clients) are finished
|
||||||
|
if not actor._no_more_peers.is_set():
|
||||||
|
if any(
|
||||||
|
chan.connected() for chan in chain(*actor._peers.values())
|
||||||
|
):
|
||||||
|
log.runtime(
|
||||||
|
f"Waiting for remaining peers {actor._peers} to clear")
|
||||||
|
with trio.CancelScope(shield=True):
|
||||||
|
await actor._no_more_peers.wait()
|
||||||
|
log.runtime("All peer channels are complete")
|
||||||
|
|
||||||
|
log.runtime("Runtime completed")
|
||||||
|
|
||||||
|
|
||||||
async def process_messages(
|
async def process_messages(
|
||||||
actor: Actor,
|
actor: Actor,
|
||||||
chan: Channel,
|
chan: Channel,
|
||||||
|
|
@ -1354,9 +1355,10 @@ async def process_messages(
|
||||||
|
|
||||||
) -> bool:
|
) -> bool:
|
||||||
'''
|
'''
|
||||||
Process messages for the channel async-RPC style.
|
Process messages for the IPC transport channel async-RPC style.
|
||||||
|
|
||||||
Receive multiplexed RPC requests and deliver responses over ``chan``.
|
Receive multiplexed RPC requests, spawn handler tasks and deliver
|
||||||
|
responses over or boxed errors back to the "caller" task.
|
||||||
|
|
||||||
'''
|
'''
|
||||||
# TODO: once https://github.com/python-trio/trio/issues/467 gets
|
# TODO: once https://github.com/python-trio/trio/issues/467 gets
|
||||||
|
|
@ -1438,7 +1440,7 @@ async def process_messages(
|
||||||
with trio.CancelScope(shield=True):
|
with trio.CancelScope(shield=True):
|
||||||
# actor.cancel() was called so kill this
|
# actor.cancel() was called so kill this
|
||||||
# msg loop and break out into
|
# msg loop and break out into
|
||||||
# ``_async_main()``
|
# ``async_main()``
|
||||||
log.cancel(
|
log.cancel(
|
||||||
f"Actor {actor.uid} was remotely cancelled "
|
f"Actor {actor.uid} was remotely cancelled "
|
||||||
f"by {chan.uid}"
|
f"by {chan.uid}"
|
||||||
|
|
@ -1457,7 +1459,7 @@ async def process_messages(
|
||||||
with trio.CancelScope(shield=True):
|
with trio.CancelScope(shield=True):
|
||||||
# actor.cancel() was called so kill this
|
# actor.cancel() was called so kill this
|
||||||
# msg loop and break out into
|
# msg loop and break out into
|
||||||
# ``_async_main()``
|
# ``async_main()``
|
||||||
kwargs['chan'] = chan
|
kwargs['chan'] = chan
|
||||||
log.cancel(
|
log.cancel(
|
||||||
f'Remote request to cancel task\n'
|
f'Remote request to cancel task\n'
|
||||||
|
|
|
||||||
Loading…
Reference in New Issue