Nicolas Ettlin created OAK-11155:
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Summary: Allow using a custom segment loading strategy
Key: OAK-11155
URL: https://issues.apache.org/jira/browse/OAK-11155
Project: Jackrabbit Oak
Issue Type: Improvement
Components: segment-tar
Reporter: Nicolas Ettlin
Currently, AbstractFileStore loads segments from the tar files by calling its
package-private readSegmentUncached method. This is too limiting when its user
needs to customize the segment loading strategy.
Ideally, the user would create a new class that would extend AbstractFileStore
and overwrite readSegmentUncached. But this is complicated to do because in
practice, users get their instances through FileStoreBuilder, which always
instantiates a FileStore the same way.
My proposal is to allow the user of AbstractFileStore to customize the behavior
of readSegmentUncached by adding a new @FunctionalInterface parameter,
SegmentLoader. If not set explicitly by the caller, FileStoreBuilder would use
an implementation of SegmentLoader which behaves the same way as it currently
does, which makes this change backwards-compatible with existing code.
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