content: /**
   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package com.alibaba.jstorm.cluster;
  
  import java.util.List;
  import java.util.UUID;
  
  import com.alibaba.jstorm.callback.ClusterStateCallback;
  
  /**
   * All ZK interface
   *
   * @author yannian
   *
   */
  public interface ClusterState {
  
      void set_ephemeral_node(String path, byte[] data) throws Exception;
  
      void delete_node(String path) throws Exception;
  
      void set_data(String path, byte[] data) throws Exception;
  
      byte[] get_data(String path, boolean watch) throws Exception;
  
      byte[] get_data_sync(String path, boolean watch) throws Exception;
  
      void sync_path(String path) throws Exception;
  
      List<String> get_children(String path, boolean watch) throws Exception;
  
      void mkdirs(String path) throws Exception;
  
      void tryToBeLeader(String path, byte[] host) throws Exception;
  
      void close();
  
      UUID register(ClusterStateCallback callback);
  
      ClusterStateCallback unregister(UUID id);
  
      boolean node_existed(String path, boolean watch) throws Exception;
  
      Integer get_version(String path, boolean watch) throws Exception;
  
  }
  