// kick off a read of a tracked object, completing asynchronously if necessary
public override void ReadAsync(PartitionReadEvent readEvent, EffectTracker effectTracker)
{
this.partition.Assert(readEvent != null);
try
{
if (readEvent.Prefetch.HasValue)
{
TryRead(readEvent.Prefetch.Value);
}
TryRead(readEvent.ReadTarget);
void TryRead(Key key)
{
TrackedObject target = null;
var status = this.mainSession.Read(ref key, ref effectTracker, ref target, readEvent, 0);
switch (status)
{
case Status.NOTFOUND:
case Status.OK:
// fast path: we hit in the cache and complete the read
this.StoreStats.HitCount++;
effectTracker.ProcessReadResult(readEvent, key, target);
break;
case Status.PENDING:
// slow path: read continuation will be called when complete
this.StoreStats.MissCount++;
break;
case Status.ERROR:
this.partition.ErrorHandler.HandleError(nameof(ReadAsync), "FASTER reported ERROR status", null, true, this.partition.ErrorHandler.IsTerminated);
break;
}
}
}
catch (Exception exception)
when(this.terminationToken.IsCancellationRequested && !Utils.IsFatal(exception))
{
throw new OperationCanceledException("Partition was terminated.", exception, this.terminationToken);
}
}
