NewDirectoryCache constructs a new directoryCache instance that tracks SQL tenant processes managed by a given directory server.

PodWatcher provides a callback channel to which tenant pod change notifications will be sent by the directory.

RefreshDelay specifies the minimum amount of time that must elapse between attempts to refresh pods for a given tenant after ReportFailure is called.

TenantWatcher provides a callback channel to which tenant metadata change notifications will be sent by the directory.

DirectoryCache is the external interface for the tenant directory cache.

DirOption defines an option that can be passed to directoryCache in order to control its behavior.