TlsReloadRegistry.h

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#ifndef LINTEL_TLSRELOADREGISTRY_H
#define LINTEL_TLSRELOADREGISTRY_H
 
#include <cstddef>
#include <functional>
#include <mutex>
#include <string>
#include <utility>
#include <vector>
 
namespace lintel {
class TlsReloadRegistry
{
public:
  using ReloadId = std::size_t;
 
  struct ReloadResult
  {
    std::string m_name;
    bool m_reloaded = false;
    std::string m_detail;
  };
 
  using Handler = std::function<std::string()>;
 
  static TlsReloadRegistry &instance();
 
  ReloadId registerHandler(std::string name, Handler handler);
 
  void unregisterHandler(ReloadId id);
 
  void clear();
 
  std::vector<ReloadResult> reload() const;
 
private:
  TlsReloadRegistry() = default;
 
  struct Entry
  {
    ReloadId m_id = 0;
    std::string m_name;
    Handler m_handler;
  };
 
  mutable std::mutex m_mutex;
  std::vector<Entry> m_entries;
  ReloadId m_nextId = 1;
};
}// namespace lintel
#endif// LINTEL_TLSRELOADREGISTRY_H