/// <inheritdoc />
public unsafe void CommitIndexCheckpoint(Guid indexToken, byte[] commitMetadata)
{
var device = NextIndexCheckpointDevice(indexToken);
// Two phase to ensure we write metadata in single Write operation
using var ms = new MemoryStream();
using var writer = new BinaryWriter(ms);
writer.Write(commitMetadata.Length);
writer.Write(commitMetadata);
WriteInto(device, 0, ms.ToArray(), (int)ms.Position);
device.Dispose();
if (removeOutdated)
{
var prior = indexTokenHistory[indexTokenHistoryOffset];
indexTokenHistory[indexTokenHistoryOffset] = indexToken;
indexTokenHistoryOffset = (indexTokenHistoryOffset + 1) % indexTokenHistory.Length;
if (prior != default)
{
deviceFactory.Delete(checkpointNamingScheme.IndexCheckpointBase(prior));
}
}
}
/// <inheritdoc />
public void Purge(Guid token)
{
// Try both because we do not know which type the guid denotes
deviceFactory.Delete(checkpointNamingScheme.LogCheckpointBase(token));
deviceFactory.Delete(checkpointNamingScheme.IndexCheckpointBase(token));
}