buildgrid.server.cas.storage.remote module

RemoteStorage

Forwwards storage requests to a remote storage.

class buildgrid.server.cas.storage.remote.RemoteStorage(channel, instance_name)

Bases: buildgrid.server.cas.storage.storage_abc.StorageABC

has_blob(digest)

Return True if the blob with the given instance/digest exists.

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.

If the blob isn’t present in storage, return None.

delete_blob(digest)

The REAPI doesn’t have a deletion method, so we can’t support deletion for remote storage.

bulk_delete(digests)

The REAPI doesn’t have a deletion method, so we can’t support bulk deletion for remote storage.

begin_write(digest)

Return a file-like object to which a blob’s contents could be written.

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.

missing_blobs(blobs)

Return a container containing the blobs not present in CAS.

bulk_update_blobs(blobs)

Given a container of (digest, value) tuples, add all the blobs to CAS. Return a list of Status objects corresponding to the result of uploading each of the blobs.

Unlike in commit_write, the storage object will verify that each of the digests matches the provided data.