/// <summary>
/// Executes the Activity
/// </summary>
/// <param name="context"></param>
protected override void Execute(NativeActivityContext context)
{
//
// We must enter a NoPersist zone because it looks like we're idle while our
// Task is executing but, we aren't really
//
NoPersistHandle noPersistHandle = NoPersistHandle.Get(context);
noPersistHandle.Enter(context);
//
// Set a bookmark that we will resume when our Task is done
//
m_Bookmark = context.CreateBookmark(BookmarkResumptionCallback);
this.Bookmark.Set(context, m_Bookmark);
m_BookmarkResumptionHelper = context.GetExtension <BookmarkResumptionHelper>();
//
// Prepare to execute
//
PrepareToExecute(context);
//
// Start a Task to do the actual execution of our activity
//
CancellationTokenSource tokenSource = new CancellationTokenSource();
m_Task = Task.Factory.StartNew(ExecuteNonblocking, tokenSource.Token);
m_Task.ContinueWith(TaskCompletionCallback);
}
protected override void Execute(NativeActivityContext context)
{
var noPersistHandle = NoPersistHandle.Get(context);
noPersistHandle.Enter(context);
var bookmark = context.CreateBookmark(BookmarkResumptionCallback);
this.Bookmark.Set(context, bookmark);
BookmarkResumptionHelper helper = context.GetExtension <BookmarkResumptionHelper>();
Action <IAsyncResult> resumeBookmarkAction = (result) =>
{
helper.ResumeBookmark(bookmark, result);
};
IAsyncResult asyncResult = this.BeginExecute(context, AsyncCompletionCallback, resumeBookmarkAction);
if (asyncResult.CompletedSynchronously)
{
noPersistHandle.Exit(context);
context.RemoveBookmark(bookmark);
EndExecute(context, asyncResult);
}
}
private void BookmarkResumptionCallback(NativeActivityContext context, Bookmark bookmark, object value)
{
var noPersistHandle = NoPersistHandle.Get(context);
if (m_Task.IsFaulted)
{
//
// The task had a problem
//
Console.WriteLine("Exception from ExecuteNonBlocking task:");
Exception ex = m_Task.Exception;
while (ex != null)
{
Console.WriteLine(ex.Message);
ex = ex.InnerException;
}
//
// If there was an exception exit the no persist handle and rethrow.
//
if (m_Task.Exception != null)
{
noPersistHandle.Exit(context);
throw m_Task.Exception;
}
}
AfterExecute(context);
noPersistHandle.Exit(context);
}
private void BookmarkResumptionCallback(NativeActivityContext context, Bookmark bookmark, object value)
{
var noPersistHandle = NoPersistHandle.Get(context);
noPersistHandle.Exit(context);
// unnecessary since it's not multiple resume:
// context.RemoveBookmark(bookmark);
IAsyncResult asyncResult = value as IAsyncResult;
this.EndExecute(context, asyncResult);
}