IPublisher.h

#ifndef IPUBLISHER_H_
#define IPUBLISHER_H_
 
#include <set>
#include <string>
 
#include "IObserver.h"
 
class IPublisher {
 public:
  void addObserver(const IObserver* o);
 
  void removeObserver(const IObserver* o);
 
  void notifyObservers(const std::string& message) const;
 
 private:
  std::set<const IObserver*> observers;
};
 
#endif  // IPUBLISHER_H_