private IEnumerable <Tuple <ScaleoutMapping, int> > GetMappings()
{
var enumerators = new List <CachedStreamEnumerator>();
var singleStream = _streams.Count == 1;
for (var streamIndex = 0; streamIndex < _streams.Count; ++streamIndex)
{
// Get the mapping for this stream
ScaleoutMappingStore store = _streams[streamIndex];
Cursor cursor = _cursors[streamIndex];
// Try to find a local mapping for this payload
var enumerator = new CachedStreamEnumerator(store.GetEnumerator(cursor.Id),
streamIndex);
enumerators.Add(enumerator);
}
var counter = 0;
while (enumerators.Count > 0)
{
ScaleoutMapping minMapping = null;
CachedStreamEnumerator minEnumerator = null;
for (int i = enumerators.Count - 1; i >= 0; i--)
{
counter += 1;
CachedStreamEnumerator enumerator = enumerators[i];
ScaleoutMapping mapping;
if (enumerator.TryMoveNext(out mapping))
{
if (minMapping == null || mapping.ServerCreationTime < minMapping.ServerCreationTime)
{
minMapping = mapping;
minEnumerator = enumerator;
}
}
else
{
enumerators.RemoveAt(i);
}
}
if (minMapping != null)
{
minEnumerator.ClearCachedValue();
yield return(Tuple.Create(minMapping, minEnumerator.StreamIndex));
}
}
_trace.TraceEvent(TraceEventType.Verbose, 0, $"End of mappings (connection ID: {Identity}). Total mappings processed: {counter}");
}
private IEnumerable <Tuple <ScaleoutMapping, int> > GetMappings()
{
var enumerators = new List <CachedStreamEnumerator>();
for (var streamIndex = 0; streamIndex < _streams.Count; ++streamIndex)
{
// Get the mapping for this stream
ScaleoutMappingStore store = _streams[streamIndex];
Cursor cursor = _cursors[streamIndex];
// Try to find a local mapping for this payload
var enumerator = new CachedStreamEnumerator(store.GetEnumerator(cursor.Id),
streamIndex);
enumerators.Add(enumerator);
}
while (enumerators.Count > 0)
{
ScaleoutMapping minMapping = null;
CachedStreamEnumerator minEnumerator = null;
for (int i = enumerators.Count - 1; i >= 0; i--)
{
CachedStreamEnumerator enumerator = enumerators[i];
ScaleoutMapping mapping;
if (enumerator.TryMoveNext(out mapping))
{
if (minMapping == null || mapping.ServerCreationTime < minMapping.ServerCreationTime)
{
minMapping = mapping;
minEnumerator = enumerator;
}
}
else
{
enumerators.RemoveAt(i);
}
}
if (minMapping != null)
{
minEnumerator.ClearCachedValue();
yield return(Tuple.Create(minMapping, minEnumerator.StreamIndex));
}
}
}