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Generic config parsing utilities

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This commit is contained in:
Andrew Noyes
2025-08-15 22:48:40 -04:00
parent c55c9f6cd9
commit f890172431
2 changed files with 58 additions and 42 deletions
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87
src/config.cpp
View File

@@ -40,58 +40,61 @@ ConfigParser::parse_toml_string(const std::string &toml_content) {
} }
} }
// Generic configuration parsing utilities
template <typename T>
void ConfigParser::parse_field(const auto &section,
const std::string &field_name, T &target) {
if (section.contains(field_name)) {
target = toml::get<T>(section.at(field_name));
}
}
template <typename Rep, typename Period>
void ConfigParser::parse_duration_field(
const auto &section, const std::string &field_name,
std::chrono::duration<Rep, Period> &target) {
if (section.contains(field_name)) {
auto value = toml::get<int>(section.at(field_name));
target = std::chrono::duration<Rep, Period>{value};
}
}
void ConfigParser::parse_section(const auto &toml_data,
const std::string &section_name,
auto parse_func) {
if (toml_data.contains(section_name)) {
const auto &section = toml_data.at(section_name);
parse_func(section);
}
}
void ConfigParser::parse_server_config(const auto &toml_data, void ConfigParser::parse_server_config(const auto &toml_data,
ServerConfig &config) { ServerConfig &config) {
if (toml_data.contains("server")) { parse_section(toml_data, "server", [&](const auto &srv) {
const auto &srv = toml_data.at("server"); parse_field(srv, "bind_address", config.bind_address);
parse_field(srv, "port", config.port);
if (srv.contains("bind_address")) { parse_field(srv, "max_request_size_bytes", config.max_request_size_bytes);
config.bind_address = toml::get<std::string>(srv.at("bind_address")); });
}
if (srv.contains("port")) {
config.port = toml::get<int>(srv.at("port"));
}
if (srv.contains("max_request_size_bytes")) {
config.max_request_size_bytes =
toml::get<size_t>(srv.at("max_request_size_bytes"));
}
}
} }
void ConfigParser::parse_commit_config(const auto &toml_data, void ConfigParser::parse_commit_config(const auto &toml_data,
CommitConfig &config) { CommitConfig &config) {
if (toml_data.contains("commit")) { parse_section(toml_data, "commit", [&](const auto &commit) {
const auto &commit = toml_data.at("commit"); parse_field(commit, "min_request_id_length", config.min_request_id_length);
parse_duration_field(commit, "request_id_retention_hours",
if (commit.contains("min_request_id_length")) { config.request_id_retention_time);
config.min_request_id_length = parse_field(commit, "request_id_retention_versions",
toml::get<size_t>(commit.at("min_request_id_length")); config.request_id_retention_versions);
} });
if (commit.contains("request_id_retention_hours")) {
auto hours = toml::get<int>(commit.at("request_id_retention_hours"));
config.request_id_retention_time = std::chrono::hours{hours};
}
if (commit.contains("request_id_retention_versions")) {
config.request_id_retention_versions =
toml::get<size_t>(commit.at("request_id_retention_versions"));
}
}
} }
void ConfigParser::parse_subscription_config(const auto &toml_data, void ConfigParser::parse_subscription_config(const auto &toml_data,
SubscriptionConfig &config) { SubscriptionConfig &config) {
if (toml_data.contains("subscription")) { parse_section(toml_data, "subscription", [&](const auto &sub) {
const auto &sub = toml_data.at("subscription"); parse_field(sub, "max_buffer_size_bytes", config.max_buffer_size_bytes);
parse_duration_field(sub, "keepalive_interval_seconds",
if (sub.contains("max_buffer_size_bytes")) { config.keepalive_interval);
config.max_buffer_size_bytes = });
toml::get<size_t>(sub.at("max_buffer_size_bytes"));
}
if (sub.contains("keepalive_interval_seconds")) {
auto seconds = toml::get<int>(sub.at("keepalive_interval_seconds"));
config.keepalive_interval = std::chrono::seconds{seconds};
}
}
} }
} // namespace weaseldb } // namespace weaseldb

13
src/config.hpp
View File

@@ -40,6 +40,19 @@ public:
parse_toml_string(const std::string &toml_content); parse_toml_string(const std::string &toml_content);
private: private:
// Generic configuration parsing utilities
template <typename T>
static void parse_field(const auto &section, const std::string &field_name,
T &target);
template <typename Rep, typename Period>
static void parse_duration_field(const auto &section,
const std::string &field_name,
std::chrono::duration<Rep, Period> &target);
static void parse_section(const auto &toml_data,
const std::string &section_name, auto parse_func);
static void parse_server_config(const auto &toml_data, ServerConfig &config); static void parse_server_config(const auto &toml_data, ServerConfig &config);
static void parse_commit_config(const auto &toml_data, CommitConfig &config); static void parse_commit_config(const auto &toml_data, CommitConfig &config);
static void parse_subscription_config(const auto &toml_data, static void parse_subscription_config(const auto &toml_data,