81 lines
2.7 KiB
Python
81 lines
2.7 KiB
Python
# 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/>.
|
|
|
|
'''
|
|
Built-in messaging patterns, types, APIs and helpers.
|
|
|
|
'''
|
|
|
|
# TODO: integration with our ``enable_modules: list[str]`` caps sys.
|
|
|
|
# ``pkgutil.resolve_name()`` internally uses
|
|
# ``importlib.import_module()`` which can be filtered by inserting
|
|
# a ``MetaPathFinder`` into ``sys.meta_path`` (which we could do before
|
|
# entering the ``_runtime.process_messages()`` loop).
|
|
# - https://github.com/python/cpython/blob/main/Lib/pkgutil.py#L645
|
|
# - https://stackoverflow.com/questions/1350466/preventing-python-code-from-importing-certain-modules
|
|
# - https://stackoverflow.com/a/63320902
|
|
# - https://docs.python.org/3/library/sys.html#sys.meta_path
|
|
|
|
# the new "Implicit Namespace Packages" might be relevant?
|
|
# - https://www.python.org/dev/peps/pep-0420/
|
|
|
|
# add implicit serialized message type support so that paths can be
|
|
# handed directly to IPC primitives such as streams and `Portal.run()`
|
|
# calls:
|
|
# - via ``msgspec``:
|
|
# - https://jcristharif.com/msgspec/api.html#struct
|
|
# - https://jcristharif.com/msgspec/extending.html
|
|
# via ``msgpack-python``:
|
|
# - https://github.com/msgpack/msgpack-python#packingunpacking-of-custom-data-type
|
|
|
|
from __future__ import annotations
|
|
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 absolute reference.
|
|
|
|
'''
|
|
_ref: object = None
|
|
|
|
def load_ref(self) -> object:
|
|
if self._ref is None:
|
|
self._ref = resolve_name(self)
|
|
return self._ref
|
|
|
|
def to_tuple(
|
|
self,
|
|
|
|
) -> tuple[str, str]:
|
|
ref = self.load_ref()
|
|
return ref.__module__, getattr(ref, '__name__', '')
|
|
|
|
@classmethod
|
|
def from_ref(
|
|
cls,
|
|
ref,
|
|
|
|
) -> NamespacePath:
|
|
return cls(':'.join(
|
|
(ref.__module__,
|
|
getattr(ref, '__name__', ''))
|
|
))
|