/// <summary>
/// Read all input items and store in temp disk ordered in each container
/// </summary>
public void Insert(IEnumerable <KeyValuePair <BsonValue, PageAddress> > items)
{
// slit all items in sorted containers
foreach (var containerItems in this.SliptValues(items, _done))
{
var container = new SortContainer(_pragmas.Collation, _containerSize);
// insert segmented items inside a container - reuse same buffer slice
container.Insert(containerItems, _order, _buffer);
_containers.Add(container);
// initialize container readers: if single container, do not use Stream file... only buffer memory
if (_done.Running == false && _containers.Count == 1)
{
container.InitializeReader(null, _buffer, _pragmas.UtcDate);
}
else
{
// store in disk
container.Position = _disk.GetContainerPosition();
_disk.Write(container.Position, _buffer);
container.InitializeReader(_reader.Value, null, _pragmas.UtcDate);
}
}
}
/// <summary>
/// Loop in values enumerator to return N values for a single container
/// </summary>
private IEnumerable <KeyValuePair <BsonValue, PageAddress> > YieldValues(IEnumerator <KeyValuePair <BsonValue, PageAddress> > source, Done done)
{
var size = SortContainer.GetKeyLength(source.Current.Key) + PageAddress.SIZE;
yield return(source.Current);
while (source.MoveNext())
{
var length = SortContainer.GetKeyLength(source.Current.Key) + PageAddress.SIZE;
done.Count++;
if (size + length > _containerSize)
{
yield break;
}
size += length;
yield return(source.Current);
}
done.Running = false;
}