public IDisposable MonitorState(string item, Action <string> updatedStateCallback)
{
var hasCache = itemState.TryGetValue(item, out var oldstate);
var monitor = new MonitorDisposable(this, item, updatedStateCallback);
lock (monitors)
{
monitors.Add(monitor);
}
EnsureBackgroundTaskState();
GetState(item).ContinueWith(t =>
{
if (t.IsCompletedSuccessfully)
{
if (hasCache && oldstate == t.Result)
{
monitor.Callback(t.Result);
}
}
});
return(monitor);
}
private void StopMonitoring(MonitorDisposable disposable)
{
lock (monitors)
{
monitors.Remove(disposable);
}
EnsureBackgroundTaskState();
}
