Initial Commit

Common/Auxiliary/TaskExtensions.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Diagnostics;
+using System.Windows.Threading;
+
+namespace Microsoft.Research.DynamicDataDisplay.Common.Auxiliary
+{
+	public static class TaskExtensions
+	{
+		/// <summary>
+		/// Logs exceptions that occur during task execution.
+		/// </summary>
+		/// <param name="task">The task.</param>
+		/// <returns></returns>
+		public static Task WithExceptionLogging(this Task task)
+		{
+			return task.ContinueWith(t =>
+			{
+				var exception = t.Exception;
+				if (exception != null)
+				{
+					if (exception.InnerException != null)
+						exception = (AggregateException)exception.InnerException;
+
+					Debug.WriteLine("Failure in async task: " + exception.Message);
+				}
+			});
+		}
+
+		/// <summary>
+		/// Rethrows exceptions thrown during task execution in thespecified dispatcher thread.
+		/// </summary>
+		/// <param name="task">The task.</param>
+		/// <param name="dispatcher">The dispatcher.</param>
+		/// <returns></returns>
+		public static Task WithExceptionThrowingInDispatcher(this Task task, Dispatcher dispatcher)
+		{
+			return task.ContinueWith(t =>
+			{
+				dispatcher.BeginInvoke(() =>
+				{
+					throw t.Exception;
+				}, DispatcherPriority.Send);
+			});
+		}
+	}
+}