feat: port DefaultBlobWriteSessionConfig to work with HttpStorageOptions #2472
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| new LazyWriteChannel<>( | ||
| () -> { | ||
| final Map<StorageRpc.Option, ?> optionsMap = opts.getRpcOptions(); | ||
| BlobInfo.Builder builder = info.toBuilder().setMd5(null).setCrc32c(null); |
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why do we need to set Md5 and CRC32C to null here?
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This is replicated to follow the pattern of all the other write methods, for example
The reasoning why this is done, is due to the fact if the checksum is present in the object GCS will enforce it, and we only want to enforce it if the option crc32cMatch() or md5Match() are provided. At which point the files will be set back to non-null in the following line with opts.blobInfoMapper().apply(builder).build().
The usage pattern this enables is the read-modify-write of an object, i.e.
// assume storage.createFrom(info, Path.get("/file/on/disk/1")); created the current generation
Blob gen1 = storage.get(BlobId.of("bucket", "object"));
Blob gen2 = storage.createFrom(gen1, Paths.get("/file/on/disk/2"));
sydney-munro
approved these changes
Mar 27, 2024
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