curvefs_tool_metric.h

/*
 *  Copyright (c) 2021 NetEase Inc.
 *
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  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.
 */

/*
 * Project: curve
 * Created Date: 2021-10-25
 * Author: chengyi01
 */
#ifndef CURVEFS_SRC_TOOLS_CURVEFS_TOOL_METRIC_H_
#define CURVEFS_SRC_TOOLS_CURVEFS_TOOL_METRIC_H_

#include <brpc/channel.h>
#include <json/json.h>

#include <iostream>
#include <string>

#include "curvefs/src/tools/curvefs_tool_define.h"

namespace curvefs {
namespace tools {

enum class MetricStatusCode {
    // success
    kOK = 0,
    // metric not found
    kNotFound = -1,
    // other error
    kOtherErr = -2,
};

class MetricClient {
 public:
    static MetricStatusCode GetMetric(const std::string& addr,
                                      const std::string& subUri,
                                      std::string* value);
    static int GetKeyValueFromJson(const std::string& strJson,
                                   const std::string& key, std::string* value);
    static int GetKeyValueFromString(const std::string& str,
                                     const std::string& key,
                                     std::string* value);
    static void TrimMetricString(std::string* str);

 protected:
    static const int kHttpCodeNotFound = 404;
};

}  // namespace tools
}  // namespace curvefs

#endif  // CURVEFS_SRC_TOOLS_CURVEFS_TOOL_METRIC_H_