Trait SegmentEnumerator

Source

pub trait SegmentEnumerator: Send + Sync {
    // Required method
    fn list_segments(&self) -> OperationResult<HashMap<Uuid, PathBuf>>;
}

Expand description

Enumerates the segments that make up the shard, keyed by their UUID.

The follower delegates discovery to an enumerator, chosen by whoever knows the backend:

the default (ManifestSegmentEnumerator, wired by open_mmap) reads the leader’s segment manifest;
LocalSegmentEnumerator scans the local segments/ directory;
an S3 follower can supply its own (e.g. reading the manifest over object storage).

Called on every refresh, so it must reflect the current set. The returned paths are segment directory paths interpreted relative to the backend root (e.g. segments/<uuid>), matching what ReadOnlySegment::open expects.