Lock
《abstract》Sync
+ lock(params):returnType+ tryRelease(int releases)：boolean+ tryAcquire(int acquires) : boolean+ tryReleaseShared(int releases)：boolean+ tryAcquireShared(int acquires) : boolean
ZkReentrantReadWriteLock
ReadLock
WriteLock
《abstract》AbstractZkSynchronizer
+ zk:ZooKeeper = ZooKeeper()+ identfyId:int = uuid
