public ValueWatcher(MetadataClientImpl client, string path, Action <ValueWatcher, string> changeAction)
{
this.changeAction = changeAction;
this.client = client;
this.path = path;
cancellationTokenSource = new CancellationTokenSource();
ready = new ManualResetEventSlim(false);
waitTask = Task.Run(WaitForChange);
if (!ready.Wait(TimeSpan.FromSeconds(10)))
{
var exception = waitTask.Exception;
var innerException = exception?.InnerExceptions.FirstOrDefault() ?? exception;
throw new InvalidOperationException($"Unable to wait for changes on {path}", innerException);
}
}