78 lines
2.2 KiB
Python
78 lines
2.2 KiB
Python
# This code is a Qiskit project.
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#
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# (C) Copyright IBM 2023.
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#
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# This code is licensed under the Apache License, Version 2.0. You may
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# obtain a copy of this license in the LICENSE.txt file in the root directory
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# of this source tree or at http://www.apache.org/licenses/LICENSE-2.0.
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#
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# Any modifications or derivative works of this code must retain this
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# copyright notice, and modified files need to carry a notice indicating
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# that they have been altered from the originals.
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"""
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===========================================================
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Storage utilities (:mod:`qiskit_serverless.utils.storage`)
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===========================================================
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.. currentmodule:: qiskit_serverless.utils.storage
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Qiskit Serverless storage utilities
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====================================
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.. autosummary::
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:toctree: ../stubs/
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PersistentStorage
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"""
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from io import BytesIO
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import os
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from typing import Optional
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from abc import abstractmethod
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import s3fs
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class BaseStorage:
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"""Base class for persistent storage."""
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@abstractmethod
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def save(self, path: str, data: BytesIO):
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"""Save data."""
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raise NotImplementedError
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@abstractmethod
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def load(self, path: str):
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"""Load data."""
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raise NotImplementedError
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class S3Storage(BaseStorage):
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"""Class for storing s3 objects in a non-temporary manner."""
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def __init__(
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self,
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endpoint: str,
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bucket: str,
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key: Optional[str] = None,
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secret: Optional[str] = None,
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):
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"""Long-term storage for serverless computation."""
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self.endpoint = endpoint
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self.bucket = bucket
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self.key = key or os.getenv("AWS_ACCESS_KEY")
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self.secret = secret or os.getenv("AWS_SECRET_ACCESS_KEY")
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self.storage = s3fs.core.S3FileSystem(
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endpoint_url=self.endpoint, key=self.key, secret=self.secret
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)
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def save(self, path, data):
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"""Store binary data in persistent storage."""
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with self.storage.open(f"{self.bucket}/{path}", "wb") as f:
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f.write(data)
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def load(self, path):
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"""Get binary data from persistent storage."""
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with self.storage.open(f"{self.bucket}/{path}", "rb") as f:
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print(f.read())
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