基于Zookeeper的集群管理器 norbert

Norbert是一個基于Zookeeper構建的集群管理器和支持集群的C/S網絡API。 norbert封裝了zookeeper和netty，使用了協議棧緩存，基于Scala實現。

Norbert is a library which provides easy cluster management and cluster aware client/server networking APIs. Implemented in Scala, Norbert wraps ZooKeeper, Netty and uses Protocol Buffers for transport to make it easy to build a cluster aware application. A Java API is provided and pluggable load balancing strategies are supported with round robin and consistent hash strategies provided out of the box.

示例代碼：

public class NorbertClient {
  public static void main(String[] args) {
    ClusterClient cc = new ZooKeeperClusterClient("norbert", "localhost:2181", 30000); (1)
    cc.awaiteConnectionUninterruptibly(); (2)
    cc.getNodes(); (3)
    cc.addListener(new MyClusterListener()); (4)
    cc.markNodeAvailable(1); (5).
    cluster.shutdown(6)
  }
}

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