chore: add Hasher#defaultHasher() - #3173
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By default, it will be the same as Hasher.enabled(). If running on java < 9, a log message will be logged making it apparent there isn't a fast implementation of crc32c. A system property `com.google.cloud.storage.Hasher.default` can be set to "disabled" to instead make the default Hasher.noop().
cojenco
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Jul 9, 2025
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LGTM, had a GVC review session with Ben
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BenWhitehead
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Merge train for * chore: cleanup Crc32cValue and associated Hasher operations #3167 * chore: add Hasher#defaultHasher() #3173 * chore: add UnifiedOpts.Opts#getHasher() to return a hasher relative to the set of Opts defined for an operation. #3174 * feat: add default end-to-end crc32c checksumming for several upload methods via grpc transport #3176 * feat: add default end-to-end checksumming for JournalingBlobWriteSessionConfig #3180 * fix: give user provided checksum precondition priority for Storage#create methods that accept byte[] #3182 * fix: move crc32c computation before writing to disk for BufferToDiskThenUpload BlobWriteSession config #3187
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By default, it will be the same as Hasher.enabled(). If running on java < 9, a log message will be logged making it apparent there isn't a fast implementation of crc32c.
A system property com.google.cloud.storage.Hasher.default can be set to "disabled" to instead make the default Hasher.noop().