async ValueTask <TResult> IAuditTrail <IRaftLogEntry> .ReadAsync <TReader, TResult>(TReader reader, long startIndex, CancellationToken token)
{
if (startIndex < 0L)
{
throw new ArgumentOutOfRangeException(nameof(startIndex));
}
using (await syncRoot.AcquireReadLockAsync(token).ConfigureAwait(false))
return(await reader.ReadAsync <IRaftLogEntry, LogEntryList>(new LogEntryList(log, startIndex, GetLastIndex(false)), null, token).ConfigureAwait(false));
}
/// <summary>
/// Reads the range of the log entries from this storage.
/// </summary>
/// <typeparam name="TResult">The type of the result.</typeparam>
/// <param name="reader">The reader over log entries.</param>
/// <param name="startIndex">The index of the first log entry to retrieve.</param>
/// <param name="endIndex">The index of the last log entry to retrieve, inclusive.</param>
/// <param name="token">The token that can be used to cancel the operation.</param>
/// <returns>The result of the transformation applied to the range of the log entries.</returns>
public async ValueTask <TResult> ReadAsync <TResult>(LogEntryConsumer <IRaftLogEntry, TResult> reader, long startIndex, long endIndex, CancellationToken token)
{
if (startIndex < 0L)
{
throw new ArgumentOutOfRangeException(nameof(startIndex));
}
if (endIndex < 0L)
{
throw new ArgumentOutOfRangeException(nameof(endIndex));
}
if (endIndex < startIndex)
{
return(await reader.ReadAsync <EmptyLogEntry, EmptyLogEntry[]>(Array.Empty <EmptyLogEntry>(), null, token).ConfigureAwait(false));
}
using (await syncRoot.AcquireReadLockAsync(token).ConfigureAwait(false))
return(await ReadCoreAsync(reader, startIndex, endIndex, token).ConfigureAwait(false));
}
