public ZooKeeperRegistery(ZooKeeperClient zkClient)
{
_zkListeners = new ConcurrentDictionary <string, ConcurrentDictionary <INotifyListener, ChildListener> >();
_zkStateListener = new StateListener();
_zkStateListener.OnReconnected += this.Recover;
_zkClient = zkClient;
_zkClient.EnsurePath(ROOT_PATH);
_zkClient.SubscribeStateListener(_zkStateListener);
}