query_state.h

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/*
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 it under the terms of the GNU General Public License, version 2.0,
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 */
 
#ifndef ROUTER_SRC_REST_MRS_SRC_MRS_DATABASE_QUERY_STATE_H_
#define ROUTER_SRC_REST_MRS_SRC_MRS_DATABASE_QUERY_STATE_H_
 
#include <string>
 
#include "mrs/database/entry/db_state.h"
#include "mrs/database/helper/query.h"
 
namespace mrs {
namespace database {
 
class QueryState : public Query {
 public:
  using DbState = mrs::database::entry::DbState;
 
 public:
  QueryState(const std::optional<uint64_t> &router_id);
 
  virtual void query_state(MySQLSession *session);
  virtual bool was_changed() const;
 
  const DbState &get_state() const;
 
  class NoRows : public std::runtime_error {
   public:
    explicit NoRows(const std::string &msg) : std::runtime_error(msg) {}
  };
 
 protected:
  void query_state_impl(MySQLSession *session,
                        MySQLSession::Transaction *transaction);
  void on_row(const ResultRow &r) override;
 
  DbState state_;
  bool changed_{true};
  bool has_rows_{false};
  std::optional<uint64_t> router_id_;
};
 
}  // namespace database
}  // namespace mrs
 
#endif  // ROUTER_SRC_REST_MRS_SRC_MRS_DATABASE_QUERY_STATE_H_