content: /*
   * Copyright (C) 2010-2101 Alibaba Group Holding Limited.
   *
   * Licensed 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.otter.common.push.supplier;
  
  /**
   * @author zebin.xuzb 2012-9-24 上午11:29:01
   * @version 4.1.0
   */
  public interface DatasourceSupplier {
  
      public void start();
  
      public void stop();
  
      public boolean isStart();
  
      /**
       * 客户端可以主动获取 master 的 {@linkplain AuthenticationInfo}
       * 
       * @return
       */
      DatasourceInfo fetchMaster();
  
      /**
       * 客户端可以注册数据库连接发生变更的callback
       * 
       * @param callback
       */
      void addSwtichCallback(DatasourceChangeCallback callback);
  
  }
  