buildgrid.server.cas.storage.disk module¶
DiskStorage¶
A CAS storage provider that stores files as blobs on disk.
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class
buildgrid.server.cas.storage.disk.
DiskStorage
(path)¶ Bases:
buildgrid.server.cas.storage.storage_abc.StorageABC
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has_blob
(digest)¶ Return True if the blob with the given instance/digest exists.
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get_blob
(digest)¶ Return a file-like object containing the blob. Most implementations will read the entire file into memory and return a BytesIO object. Eventually this should be corrected to handle files which cannot fit into memory.
The file-like object must be readable and seekable.
If the blob isn’t present in storage, return None.
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bulk_read_blobs
(digests)¶ Given an iterable container of digests, return a {hash: file-like object} dictionary corresponding to the blobs represented by the input digests.
Each file-like object must be readable and seekable.
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delete_blob
(digest)¶ Delete the blob from storage if it’s present.
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begin_write
(digest)¶ Return a file-like object to which a blob’s contents could be written.
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commit_write
(digest, write_session)¶ Commit the write operation. write_session must be an object returned by begin_write.
The storage object is not responsible for verifying that the data written to the write_session actually matches the digest. The caller must do that.
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