public DefaultClusterFactory(ILogger <DefaultClusterFactory> logger, IServiceProvider serviceProvider, IOptions <FastDFSOption> options, IClusterSelector clusterSelector)
 {
     _logger          = logger;
     _serviceProvider = serviceProvider;
     _option          = options.Value;
     _clusterSelector = clusterSelector;
     _clusterDict     = new ConcurrentDictionary <string, ICluster>();
 }
 public DefaultClusterSelector(IOptions <FastDFSOption> options)
 {
     _option = options.Value;
 }