async void chimneyMpdServer_OnUpdate(object sender, ResponseEventArgs e)
{
string response = string.Empty;
if (!is_db_updating)
{
is_db_updating = true;
db_updating_id++;
await UpdateDatabase();
}
response += "updating_db: " + db_updating_id;
chimneyMpdServer.AppendResponse(response, e.id, e.position);
}