text: // Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
  
  #pragma once
  
  namespace proton {
  
  class IBucketStateChangedHandler;
  
  /**
   * Interface used to request notification when bucket state has changed.
   */
  class IBucketStateChangedNotifier
  {
  public:
      virtual void addBucketStateChangedHandler(IBucketStateChangedHandler *handler) = 0;
      virtual void removeBucketStateChangedHandler(IBucketStateChangedHandler *handler) = 0;
      
      virtual ~IBucketStateChangedNotifier() = default;
  };
  
  }
  