public Task <bool> GetSynchronizationTaskAsync(int requiredHostDocumentVersion, CancellationToken cancellationToken)
{
// Cancel any out-of-date existing synchronizing contexts.
for (var i = _synchronizingContexts.Count - 1; i >= 0; i--)
{
var context = _synchronizingContexts[i];
if (context.RequiredHostDocumentVersion < requiredHostDocumentVersion)
{
// All of the existing synchronizations that are older than this version are no longer valid.
context.SetSynchronized(result: false);
_synchronizingContexts.RemoveAt(i);
}
}
var synchronizingContext = new DocumentSynchronizingContext(requiredHostDocumentVersion, _synchronizingTimeout, cancellationToken);
_synchronizingContexts.Add(synchronizingContext);
return(synchronizingContext.OnSynchronizedAsync);
}
public void UpdateSynchronizingContext(int requiredHostDocumentVersion, CancellationToken cancellationToken)
{
// Cancel our existing synchronizing context.
SynchronizingContext?.SetSynchronized(result: false);
SynchronizingContext = new DocumentSynchronizingContext(requiredHostDocumentVersion, _synchronizingTimeout, cancellationToken);
}