public static void Main()
{
CancellationTokenSource cts = new CancellationTokenSource();
// Start up a UI thread for cancellation.
Task.Run(() =>
{
if (Console.ReadKey(true).KeyChar == 'c')
cts.Cancel();
});
//Generate some source data.
BlockingCollection<int>[] sourceArrays = new BlockingCollection<int>[5];
for (int i = 0; i < sourceArrays.Length; i++)
sourceArrays[i] = new BlockingCollection<int>(500);
Parallel.For(0, sourceArrays.Length * 500, (j) =>
{
int k = BlockingCollection<int>.TryAddToAny(sourceArrays, j);
if (k >= 0)
Console.WriteLine("added {0} to source data", j);
});
foreach (var arr in sourceArrays)
arr.CompleteAdding();
// First filter accepts the ints, keeps back a small percentage
// as a processing fee, and converts the results to decimals.
var filter1 = new PipelineFilter<int, decimal>
(
sourceArrays,
(n) => Convert.ToDecimal(n * 0.97), // Func
cts.Token,
"filter1"
);
// Second filter accepts the decimals and converts them to
// System.Strings.
var filter2 = new PipelineFilter<decimal, string>
(
filter1.m_output,
(s) => String.Format("{0}", s), // Func
cts.Token,
"filter2"
);
// Third filter uses the constructor with an Action<T>
// that renders its output to the screen,
// not a blocking collection.
var filter3 = new PipelineFilter<string, string>
(
filter2.m_output,
(s) => Console.WriteLine("The final result is {0}", s), // Action
cts.Token,
"filter3"
);
// Start up the pipeline!
try
{
Parallel.Invoke(
() => filter1.Run(),
() => filter2.Run(),
() => filter3.Run()
);
}
catch (AggregateException ae)
{
foreach (var ex in ae.InnerExceptions)
Console.WriteLine(ex.Message + ex.StackTrace);
}
finally
{
cts.Dispose();
}
// You will need to press twice if you ran to the end:
// once for the cancellation thread, and once for this thread.
Console.WriteLine("Press any key.");
Console.ReadKey(true);
}
