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89 lines
2.9 KiB
Python
89 lines
2.9 KiB
Python
# Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from lightning.pytorch.callbacks import Callback as PTLCallback
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class BaseCallback(PTLCallback):
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"""Base callback ABC for NeMo lifecycle hooks (extends PTL callback).
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Implementers may override any subset of the following methods. All are
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optional no-op defaults to keep implementations lightweight.
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"""
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# App lifecycle
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def on_app_start(self, *args, **kwargs) -> None:
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"""Called when the application starts."""
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pass
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def on_app_end(self, *args, **kwargs) -> None:
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"""Called when the application ends."""
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pass
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# Model lifecycle
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def on_model_init_start(self, *args, **kwargs) -> None:
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"""Called when model initialization starts."""
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pass
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def on_model_init_end(self, *args, **kwargs) -> None:
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"""Called when model initialization ends."""
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pass
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# Dataloader lifecycle
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def on_dataloader_init_start(self, *args, **kwargs) -> None:
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"""Called when dataloader initialization starts."""
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pass
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def on_dataloader_init_end(self, *args, **kwargs) -> None:
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"""Called when dataloader initialization ends."""
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pass
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# Optimizer lifecycle
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def on_optimizer_init_start(self, *args, **kwargs) -> None:
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"""Called when optimizer initialization starts."""
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pass
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def on_optimizer_init_end(self, *args, **kwargs) -> None:
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"""Called when optimizer initialization ends."""
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pass
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# Checkpoint lifecycle
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def on_load_checkpoint_start(self, *args, **kwargs) -> None:
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"""Called when checkpoint loading starts."""
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pass
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def on_load_checkpoint_end(self, *args, **kwargs) -> None:
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"""Called when checkpoint loading ends."""
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pass
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def on_save_checkpoint_start(self, *args, **kwargs) -> None:
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"""Called when checkpoint saving starts."""
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pass
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def on_save_checkpoint_end(self, *args, **kwargs) -> None:
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"""Called when checkpoint saving ends."""
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pass
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def on_save_checkpoint_success(self, *args, **kwargs) -> None:
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"""Called when checkpoint saving succeeds."""
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pass
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# Configuration update
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def update_config(self, *args, **kwargs) -> None:
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"""Update callback-specific configuration after initialization."""
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pass
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__all__ = ["BaseCallback"]
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