56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
# Copyright 2022 The JAX Authors.
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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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# https://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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import os
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from jax._src import path as pathlib
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from jax._src.compilation_cache_interface import CacheInterface
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class GFileCache(CacheInterface):
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def __init__(self, path: str):
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"""Sets up a cache at 'path'. Cached values may already be present."""
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self._path = pathlib.Path(path)
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self._path.mkdir(parents=True, exist_ok=True)
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def get(self, key: str):
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"""Returns None if 'key' isn't present."""
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if not key:
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raise ValueError("key cannot be empty")
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path_to_key = self._path / key
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if path_to_key.exists():
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return path_to_key.read_bytes()
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else:
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return None
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def put(self, key: str, value: bytes):
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"""Adds new cache entry."""
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if not key:
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raise ValueError("key cannot be empty")
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path_to_new_file = self._path / key
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if str(path_to_new_file).startswith('gs://'):
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# Writes to gcs are atomic.
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path_to_new_file.write_bytes(value)
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elif str(path_to_new_file).startswith('file://') or '://' not in str(path_to_new_file):
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tmp_path = self._path / f"_temp_{key}"
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with open(str(tmp_path), "wb") as f:
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f.write(value)
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f.flush()
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os.fsync(f.fileno())
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os.rename(tmp_path, path_to_new_file)
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else:
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tmp_path = self._path / f"_temp_{key}"
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tmp_path.write_bytes(value)
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tmp_path.rename(str(path_to_new_file))
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