IFdbDirectoryLayerMapper

Namespace: FoundationDB.Client · interface

Helper interface that can map keys to their corresponding directories

Methods

GetPaths

IReadOnlyDictionary<FdbPath, Slice> GetPaths()

Returns the map of all known directories

TryMapKey

bool TryMapKey(Slice key, out FdbPath path, out Slice mappedKey)

Finds the path that contains a given key in the database

• key — Key in the database snapshot
• path — Receives the path to the directory subspace that contains this key
• mappedKey — Receives the tail of the key, minus the path prefix.

Returns: true if key belongs to a known path; otherwise, false

TryMapPath

bool TryMapPath(FdbPath path, out Slice prefix)

Returns the prefix that corresponds to a given path, if it is known

• path — Path to map
• prefix — Receives the key prefix for this path

Returns: true if the path is known by this mapper; otherwise, false