relabel_config.hh

/*
 * This file is open source software, licensed to you under the terms
 * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
 * distributed with this work for additional information regarding copyright
 * ownership.  You may not use this file except in compliance with the License.
 *
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
/*
 * Copyright 2022 ScyllaDB
 */
#ifndef SEASTAR_MODULE
#include <regex>
#endif
#include <seastar/util/modules.hh>
 
namespace seastar {
namespace metrics {
 
SEASTAR_MODULE_EXPORT_BEGIN
 
class relabel_config_regex {
    std::string _regex_str;
    std::regex _regex;
public:
    relabel_config_regex() = default;
    relabel_config_regex(const std::string& expr) : _regex_str(expr), _regex(std::regex(expr)) {}
    relabel_config_regex(const char* expr) : _regex_str(expr), _regex(std::regex(expr)) {}
    const std::string& str() const noexcept {
        return _regex_str;
    }
    const std::regex& regex() const noexcept {
        return _regex;
    }
 
    relabel_config_regex& operator=(const char* expr) {
        std::string str(expr);
        return operator=(str);
    }
 
    relabel_config_regex& operator=(const std::string& expr) {
        _regex_str = expr;
        _regex = std::regex(_regex_str);
        return *this;
    }
};
 
struct relabel_config {
    enum class relabel_action {skip_when_empty, report_when_empty, replace, keep, drop, drop_label};
    std::vector<std::string> source_labels;
    std::string target_label;
    std::string replacement = "${1}";
    relabel_config_regex expr = "(.*)";
    relabel_action action = relabel_action::replace;
    std::string separator = ";";
};
 
relabel_config::relabel_action relabel_config_action(const std::string& action);
 
SEASTAR_MODULE_EXPORT_END
 
}
}