cached_event.h

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#ifndef MYSQL_CSA_RELAY_LOG_CACHED_EVENT_H
#define MYSQL_CSA_RELAY_LOG_CACHED_EVENT_H
 
#include <memory>
#include "sql/changestreams/apply/storage/relay_log/ireader_event.h"
#include "sql/log_event.h"  // Log_event
 
namespace mysql::csa {
 
/// @brief Implementation of the IReader_event which contains a cached, decoded
/// event
class Cached_event : public IReader_event {
 public:
  /// Is constructed using Log_event
  /// @param ev Smart pointer to decoded Log_event
  Cached_event(const std::shared_ptr<Log_event> &ev);
 
  /// Destructor
  virtual ~Cached_event() override = default;
 
  /// @brief Decode function, which obtains Log event smart pointer
  /// @return Log event smart pointer
  std::shared_ptr<Log_event> decode() override;
 
  /// @brief Resets event state
  /// @param fde Fde used to create new event object
  void reset(const Format_description_log_event *fde) override;
 
 private:
  /// Internal data - cached event
  std::shared_ptr<Log_event> m_data;
  char *orig_buf{nullptr};
};
 
}  // namespace mysql::csa
 
#endif  // MYSQL_CSA_RELAY_LOG_CACHED_EVENT_H