change_notifier.hpp

#pragma once
 
#include <launchdarkly/connection.hpp>
 
#include <functional>
#include <memory>
#include <set>
#include <string>
 
namespace launchdarkly::server_side {
 
class IChangeNotifier {
   public:
    using ChangeSet = std::set<std::string>;
    using ChangeHandler = std::function<void(std::shared_ptr<ChangeSet>)>;
 
    virtual std::unique_ptr<IConnection> OnFlagChange(
        ChangeHandler handler) = 0;
 
    virtual ~IChangeNotifier() = default;
    IChangeNotifier(IChangeNotifier const& item) = delete;
    IChangeNotifier(IChangeNotifier&& item) = delete;
    IChangeNotifier& operator=(IChangeNotifier const&) = delete;
    IChangeNotifier& operator=(IChangeNotifier&&) = delete;
 
   protected:
    IChangeNotifier() = default;
};
 
}  // namespace launchdarkly::server_side