/// <summary>
/// Link this block to another, when it completes.
/// N-th links are linked to the previous block.
/// Non propagation targets(Actions blocks) are proxied and their input is used as output after invoking.
/// </summary>
/// <param name="target"></param>
/// <param name="options"></param>
public void LinkOnComplete(BaseFlowBlock <TOut, TOut> target,
DataflowLinkOptions options = null)
{
var targetBuffer = target.GetInputBlock();
var targetAction = target.GetProcessingBlock();
if (options == null)
{
options = new DataflowLinkOptions()
{
PropagateCompletion = true
}
}
;
//Determine the block that we'll be waiting for, since we're posting to a buffer, linked to an action block
//use that block to link any secondary blocks to it!
IPropagatorBlock <TOut, TOut> targetOutputBlock = null;
switch (target.ProcType)
{
case BlockType.Action:
//Create a blank transformer, and link the target to it
targetOutputBlock = new TransformBlock <TOut, TOut>(x =>
{
return(x);
});
target.LinkTo(targetOutputBlock);
break;
case BlockType.Transform:
targetOutputBlock = target._transformer;
break;
}
//First link, link to the target's buffer
if (_transformerOnCompletion == null)
{
_transformerOnCompletion = targetBuffer;
}
else
{
_lastTransformerBlockOnCompletion.LinkTo(targetBuffer, options);
}
//So that the next block can link to the output of the previous
_lastTransformerBlockOnCompletion = targetOutputBlock;
AddCompletionTask(target.FlowCompletion());
}
public DonutBlock(BaseFlowBlock <T, T> flowblock,
IPropagatorBlock <T, FeaturesWrapper <T> > featureblock)
{
FlowBlock = flowblock;
FeaturePropagator = featureblock;
}