Add interface for FileIO prefix operations and implementations #5096
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…doopFileIO and S3FileIO
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mostly LGTM once we switch to Tasks.foreach, everything else were just a few nits
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| /** | ||
| * This method provides a "best-effort" to delete all objects under the | ||
| * given prefix. | ||
| * |
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| return () -> client().listObjectsV2Paginator(request).stream() | ||
| .flatMap(r -> r.contents().stream()) | ||
| .map(o -> new FileInfo( | ||
| String.format("%s://%s/%s", s3uri.scheme(), s3uri.bucket(), o.key()), |
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Minor: The bucket returned by S3URI may actually be an access point reference, which could break URI parsing if this were to embed it in a location.
I think the solution is to move the S3 access point mapping out of S3URI, since that class should remain simple and report what was parsed and avoid this kind of issue. Let's not fix it here, but we should revisit this.
FYI @jackye1995.
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This adds an interface for FileIO implementations to support prefix based operations for listing and deleting.
The primary motivation is to enable supporting maintenance activities (like cleaning path directories or listing table locations) without the need to fall back to Hadoop FileSystem.
There are some notable behavioral differences between directory based and object based storage systems (e.g. for directory based storage, a the prefix must denote a directory).