dillard
ab3f0ea948
ExternalStorageFactory builds storages with files_external's own backends and auth mechanisms from an unsaved StorageConfig (as its ConfigAdapter does), and StorageBackend adapts any IStorage to IBackend (writeStream, seekable range reads, temp name + rename except on S3). IBackend::put() now owns and always closes the stream, because files_external's S3 writeStream closes it. Spike D (NC34): S3 (SeaweedFS) and SFTP: 120 MiB backup ~6s, unchanged run uploads nothing, restore bit-identical, no files_external mount created, no temp files (max 12 KiB in /tmp). Works with files_external disabled when its classes are loaded. Backup peak memory 85-89 MiB on these targets (to investigate).
35 lines
1.1 KiB
PHP
35 lines
1.1 KiB
PHP
<?php
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declare(strict_types=1);
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// SPDX-FileCopyrightText: 2026 Dillard Blom
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// SPDX-License-Identifier: AGPL-3.0-or-later
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namespace OCA\NgBackup\Backend;
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/**
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* Minimal object store used by the repository. Paths are relative, '/'-separated.
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* Implementations: a local directory (spike, tests), and adapters over files_external storages.
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*/
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interface IBackend {
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/**
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* Store an object; the stream is read to EOF. Takes ownership of the stream: it is always
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* closed afterwards (some storages, like files_external's S3, close it themselves).
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* Must not leave a partial object behind on failure.
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*/
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public function put(string $path, $stream): void;
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/** @return resource readable stream of the whole object */
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public function get(string $path);
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/** @return string bytes [$offset, $offset + $length) of the object (used to fetch single blobs from a pack) */
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public function getRange(string $path, int $offset, int $length): string;
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public function exists(string $path): bool;
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/** @return list<string> object paths below $prefix (recursive) */
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public function list(string $prefix): array;
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public function delete(string $path): void;
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}
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