/// <summary>
/// Sends the data to the operator's ReduceReceiver to be aggregated.
/// </summary>
/// <param name="data">The data to send</param>
/// <param name="cancellationSource">The cancellationSource for cancel the operation</param>
public void Send(T data, CancellationTokenSource cancellationSource = null)
{
var messageList = PipelineDataConverter.PipelineMessage(data);
if (data == null)
{
throw new ArgumentNullException("data");
}
foreach (var message in messageList)
{
if (_topology.HasChildren())
{
var reducedValueOfChildren = _topology.ReceiveFromChildren(_pipelinedReduceFunc, cancellationSource);
var mergeddData = new List <PipelineMessage <T> > {
message
};
if (reducedValueOfChildren != null)
{
mergeddData.Add(reducedValueOfChildren);
}
var reducedValue = _pipelinedReduceFunc.Reduce(mergeddData);
_topology.SendToParent(reducedValue, MessageType.Data);
}
else
{
_topology.SendToParent(message, MessageType.Data);
}
}
}
/// <summary>
/// Receives messages sent by all ReduceSenders and aggregates them
/// using the specified IReduceFunction.
/// </summary>
/// <returns>The single aggregated data</returns>
public T Reduce()
{
PipelineMessage <T> message;
var messageList = new List <PipelineMessage <T> >();
do
{
message = _topology.ReceiveFromChildren(_pipelinedReduceFunc);
messageList.Add(message);
}while (!message.IsLast);
return(PipelineDataConverter.FullMessage(messageList));
}