/*
 * 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.
 */
#ifndef _DECAF_UTIL_LOGGING_PROPERTIESCHANGELISTENER_H_
#define _DECAF_UTIL_LOGGING_PROPERTIESCHANGELISTENER_H_

#include <decaf/util/Config.h>

namespace decaf{
namespace util{
namespace logging{

   /**
    * Defines the interface that classes can use to listen for change
    * events on Properties.
    */
   class DECAF_API PropertiesChangeListener
   {
   public:

      virtual ~PropertiesChangeListener() {}

      /**
       * Change Event, called when a property is changed
       * @param name - Name of the Property
       * @param oldValue - Old Value of the Property
       * @param newValue - New Value of the Property
       */
      virtual void onPropertyChanged( const std::string& name,
                                      const std::string& oldValue,
                                      const std::string& newValue ) = 0;

   };

}}}

#endif /*_DECAF_UTIL_LOGGING_PROPERTIESCHANGELISTENER_H_*/