router_cs_options.h

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/*
  Copyright (c) 2022, 2024, Oracle and/or its affiliates.
 
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  it under the terms of the GNU General Public License, version 2.0,
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*/
 
#ifndef METADATA_CACHE_ROUTER_CS_OPTIONS_INCLUDED
#define METADATA_CACHE_ROUTER_CS_OPTIONS_INCLUDED
 
#include "cluster_metadata.h"
 
/** @class RouterClusterSetOptions
 *
 * @brief Represents the Router options in v2_cs_router_options view in the
 * metadata schema
 */
class RouterClusterSetOptions {
 public:
  /** @brief Pupulate the object by reading the options from the metadata
   *
   * @param session mysql server session to read metadata with
   * @param router_id id of the Router in the metadata
   *
   * @returns true if successful, false otherwise
   */
  bool read_from_metadata(mysqlrouter::MySQLSession &session,
                          const unsigned router_id);
 
  /** @brief Get the raw JSON string read from the metadata during the last
   * read_from_metadata() call
   */
  std::string get_string() const { return options_str_; }
 
  /** @brief Get the target_cluster assigned for a given Router in the metadata
   *
   * @param router_id id of the Router in the metadata
   *
   * @returns assigned target_cluster if read successful, std::nullopt otherwise
   */
  std::optional<mysqlrouter::TargetCluster> get_target_cluster(
      const unsigned router_id) const;
 
  /** @brief Get the stats updates ferquency value (in seconds) assigned for a
   * given Router in the metadata
   */
  std::chrono::seconds get_stats_updates_frequency() const;
 
  /** @brief Get the get_use_replica_primary_as_rw boolean value assigned for a
   * given Router in the metadata
   */
  bool get_use_replica_primary_as_rw() const;
 
 private:
  std::string get_router_option_str(const std::string &options,
                                    const std::string &name,
                                    const std::string &default_value,
                                    std::string &out_error) const;
 
  uint32_t get_router_option_uint(const std::string &options,
                                  const std::string &name,
                                  const uint32_t &default_value,
                                  std::string &out_error) const;
 
  uint32_t get_router_option_bool(const std::string &options,
                                  const std::string &name,
                                  const bool &default_value,
                                  std::string &out_error) const;
 
  std::string options_str_;
};
 
#endif  // METADATA_CACHE_ROUTER_CS_OPTIONS_INCLUDED