/**
 * 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 {
    public void set_ephemeral_node(String path, byte[] data) throws Exception;

    public void delete_node(String path) throws Exception;

    public void set_data(String path, byte[] data) throws Exception;

    public byte[] get_data(String path, boolean watch) throws Exception;

    public byte[] get_data_sync(String path, boolean watch) throws Exception;

    public List<String> get_children(String path, boolean watch)
            throws Exception;

    public void mkdirs(String path) throws Exception;

    public void tryToBeLeader(String path, byte[] host) throws Exception;

    public void close();

    public UUID register(ClusterStateCallback callback);

    public ClusterStateCallback unregister(UUID id);

    public boolean node_existed(String path, boolean watch) throws Exception;
}
