////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2016 ArangoDB GmbH, Cologne, Germany
///
/// 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.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Jan Steemann
////////////////////////////////////////////////////////////////////////////////

#ifndef ARANGODB_APPLICATION_FEATURES_MAX_MAP_COUNT_FEATURE_H
#define ARANGODB_APPLICATION_FEATURES_MAX_MAP_COUNT_FEATURE_H 1

#include "ApplicationFeatures/ApplicationFeature.h"

namespace arangodb {

class MaxMapCountFeature final : public application_features::ApplicationFeature {
 public:
  explicit MaxMapCountFeature(application_features::ApplicationServer& server);
  ~MaxMapCountFeature();

  void prepare() override final;
  void collectOptions(std::shared_ptr<options::ProgramOptions>) override final;

  static constexpr bool needsChecking() {
#ifdef __linux__
    return true;
#else
    return false;
#endif
  }

  static uint64_t minimumExpectedMaxMappings();
  static uint64_t actualMaxMappings();
  static bool isNearMaxMappings();

 private:
  static bool isNearMaxMappingsInternal(double& suggestedCacheTime) noexcept;
};

}  // namespace arangodb

#endif