feat: add instance_id to configuration

 project-tsurugi/tsurugi-issues#1409

Author: umegane

include/limestone/api/configuration.h

@@ -16,6 +16,8 @@
 #pragma once
 
 #include <filesystem>
+#include <string>
+#include <string_view>
 #include <vector>
 
 #include <boost/filesystem.hpp>
@@ -68,6 +70,11 @@ class configuration {
      */
     void set_data_location(const std::filesystem::path& data_location) noexcept;
 
+    /**
+     * @brief setter for instance_id
+     * @param instance_id the instance id
+     */
+    void set_instance_id(std::string_view instance_id) noexcept;
 
     /**
      * @brief setter for recover_max_parallelism
@@ -82,6 +89,8 @@ class configuration {
 
     boost::filesystem::path metadata_location_{};
 
+    std::string instance_id_{};
+
     int recover_max_parallelism_{default_recover_max_parallelism};
 
     friend class datastore;

src/limestone/configuration.cpp

@@ -43,4 +43,8 @@ void configuration::set_data_location(const std::filesystem::path& data_location
     data_locations_.emplace_back(std::move(boost_location));
 }
 
+void configuration::set_instance_id(std::string_view instance_id) noexcept {
+    instance_id_ = instance_id;
+}
+
 } // namespace limestone::api