public static void RunSynchronously(Task task)
{
while (!task.IsCompleted)
{
if (!ForegroundSynchronizationContext.ProcessAsyncTasks())
{
System.Threading.Thread.Sleep(50);
}
}
task.GetAwaiter().GetResult();
}
/// <summary>
/// Performs one step of the sync algorithm, which makes at most one service call
/// to the Yammer REST endpoint. This method is intended to be called at periodic intervals
/// and may return without doing any work, e.g. if the state machine is waiting for a timeout.
/// </summary>
public void Process()
{
ForegroundSynchronizationContext.ProcessAsyncTasks();
// Avoid reentrancy that could occur e.g. if the CallingService event handler calls
// Utilities.ProcessApplicationEvents(), which causes another timer event to be processed.
if (alreadyProcessing)
{
return;
}
try
{
alreadyProcessing = true;
// Make sure the previous async task has completed
if (previousAsyncTask != null)
{
bool finished = previousAsyncTask.IsCanceled || previousAsyncTask.IsCompleted ||
previousAsyncTask.IsFaulted;
if (previousAsyncTask.IsFaulted)
{
var innerException = previousAsyncTask.Exception.InnerExceptions.First();
throw new Exception("A problem occurred while syncing messages.",
innerException);
}
if (!finished)
{
return;
}
}
previousAsyncTask = ProcessAsync();
}
finally
{
alreadyProcessing = false;
}
ForegroundSynchronizationContext.ProcessAsyncTasks();
}