/// <summary>
/// Builds the starting and final blocks of the dataflow.
/// </summary>
IDataflowBuilderBuildResult <TStart, TOutput> IDataflowBuilder <TStart, TOutput> .Build()
{
ITargetBlock <TStart> starting_block;
var current_block = this.CreateBlock();
if (this.previousBuilder != null)
{
var previous_build_result = this.previousBuilder.Build();
starting_block = previous_build_result.StartingBlock;
previous_build_result.FinalBlock.LinkWithCompletionPropagation(current_block);
}
else
{
starting_block = current_block as ITargetBlock <TStart>;
if (starting_block == null)
{
throw new InvalidOperationException(string.Format("Block {0} can not be casted to the type of the starting block {1}.",
current_block.GetType(),
typeof(ITargetBlock <TStart>)));
}
}
var result = new DataflowBuilderBuildResult <TStart, TOutput> (starting_block, current_block);
return(result);
}
/// <summary>
/// Builds the starting and final blocks of the dataflow.
/// </summary>
IDataflowBuilderBuildResult <TStart, TInput[]> IDataflowBuilder <TStart, TInput[]> .Build()
{
ITargetBlock <TStart> starting_block;
ISourceBlock <TInput[]> ending_block;
var batch_block = (BatchBlock <TInput>) this.CreateBlock();
if (this.batchWaitingTimeout == null)
{
starting_block = batch_block as ITargetBlock <TStart>;
ending_block = batch_block;
}
else
{
Timer timer = null;
var timeout = (long)this.batchWaitingTimeout.Value.TotalMilliseconds;
timer = new Timer(
callback: _ =>
{
batch_block.TriggerBatch();
// ReSharper disable once AccessToModifiedClosure
timer?.Change(timeout, -1);
},
state: null,
dueTime: timeout * 2,
period: -1);
var after_batch_block = new TransformBlock <TInput[], TInput[]>(
input =>
{
timer.Change(timeout, -1);
return(input);
},
new ExecutionDataflowBlockOptions
{
MaxDegreeOfParallelism = 1,
EnsureOrdered = this.options.EnsureOrdered
});
batch_block.LinkWithCompletionPropagation(after_batch_block);
starting_block = batch_block as ITargetBlock <TStart>;
ending_block = after_batch_block;
}
if (this.previousBuilder != null)
{
var previous_build_result = this.previousBuilder.Build();
previous_build_result.FinalBlock.LinkWithCompletionPropagation((ITargetBlock <TInput>)starting_block);
starting_block = previous_build_result.StartingBlock;
}
if (starting_block == null)
{
throw new InvalidOperationException(string.Format("Block {0} can not be casted to the type of the starting block {1}.",
batch_block.GetType(),
typeof(ITargetBlock <TStart>)));
}
var result = new DataflowBuilderBuildResult <TStart, TInput[]>(starting_block, ending_block);
return(result);
}
