public Etag CreateSequentialUuid(UuidType type)
{
long increment;
switch (type)
{
case UuidType.Documents:
increment = Interlocked.Increment(ref sequentialUuidCounterDocuments);
break;
case UuidType.Attachments:
increment = Interlocked.Increment(ref sequentialUuidCounterAttachments);
break;
case UuidType.DocumentTransactions:
increment = Interlocked.Increment(ref sequentialUuidCounterDocumentsTransactions);
break;
case UuidType.MappedResults:
increment = Interlocked.Increment(ref sequentialUuidCounterMappedResults);
break;
case UuidType.ReduceResults:
increment = Interlocked.Increment(ref sequentialUuidCounterReduceResults);
break;
case UuidType.Queue:
increment = Interlocked.Increment(ref sequentialUuidCounterQueue);
break;
case UuidType.Tasks:
increment = Interlocked.Increment(ref sequentialUuidCounterTasks);
break;
case UuidType.ScheduledReductions:
increment = Interlocked.Increment(ref sequentialUuidCounterScheduledReductions);
break;
case UuidType.Indexing:
increment = Interlocked.Increment(ref sequentialUuidCounterIndexing);
break;
case UuidType.EtagSynchronization:
increment = Interlocked.Increment(ref sequentialUuidEtagSynchronization);
break;
default:
throw new ArgumentOutOfRangeException("type", "Cannot understand: " + type);
}
var currentAsBytes = BitConverter.GetBytes(increment);
Array.Reverse(currentAsBytes);
var bytes = new byte[16];
Array.Copy(ticksAsBytes, 0, bytes, 0, ticksAsBytes.Length);
Array.Copy(currentAsBytes, 0, bytes, 8, currentAsBytes.Length);
bytes[0] = (byte) type; // record the etag type, if we need it for debug later
return Etag.Parse(bytes);
}
}
