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# Copyright The Lightning AI team.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
from importlib.metadata import entry_points
from inspect import getmembers, isclass
from types import ModuleType
from typing import Any, Union
from lightning_utilities import is_overridden
from lightning_fabric.utilities.imports import _PYTHON_GREATER_EQUAL_3_10_0
_log = logging.getLogger(__name__)
def _load_external_callbacks(group: str) -> list[Any]:
"""Collect external callbacks registered through entry points.
The entry points are expected to be functions returning a list of callbacks.
Args:
group: The entry point group name to load callbacks from.
Return:
A list of all callbacks collected from external factories.
"""
factories = (
entry_points(group=group) if _PYTHON_GREATER_EQUAL_3_10_0 else entry_points().get(group, {}) # type: ignore[arg-type]
)
external_callbacks: list[Any] = []
for factory in factories:
callback_factory = factory.load()
callbacks_list: Union[list[Any], Any] = callback_factory()
callbacks_list = [callbacks_list] if not isinstance(callbacks_list, list) else callbacks_list
if callbacks_list:
_log.info(
f"Adding {len(callbacks_list)} callbacks from entry point '{factory.name}':"
f" {', '.join(type(cb).__name__ for cb in callbacks_list)}"
)
external_callbacks.extend(callbacks_list)
return external_callbacks
def _register_classes(registry: Any, method: str, module: ModuleType, parent: type[object]) -> None:
for _, member in getmembers(module, isclass):
if issubclass(member, parent) and is_overridden(method, member, parent):
register_fn = getattr(member, method)
register_fn(registry)
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