/// <inheritdoc/>
public override bool AdmitCommit(long currentTail, bool metadataChanged)
{
var now = stopwatch.ElapsedMilliseconds;
while (true)
{
var lastSeenMilli = lastAdmittedMilli;
var lastSeenAddress = lastAdmittedAddress;
if (now - lastSeenMilli < thresholdMilli && currentTail - lastSeenAddress < thresholdRange)
{
// Only allow spawning of task if no other task is already underway
if (Interlocked.CompareExchange(ref shouldRetry, 1, 0) == 0)
{
Task.Run(async() =>
{
await Task.Delay(TimeSpan.FromMilliseconds(thresholdMilli));
shouldRetry = 0;
log.Commit();
});
}
return(false);
}
if (Interlocked.CompareExchange(ref lastAdmittedMilli, now, lastSeenMilli) == lastSeenMilli &&
Interlocked.CompareExchange(ref lastAdmittedAddress, currentTail, lastSeenAddress) == lastSeenAddress)
{
return(true);
}
}
}
/// <inheritdoc/>
public override void OnCommitFinished(FasterLogRecoveryInfo info)
{
Interlocked.Decrement(ref commitInProgress);
if (shouldRetry)
{
shouldRetry = false;
log.Commit();
}
}