text: /*
   * Copyright (C) 2018 The Android Open Source Project
   *
   * 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.
   */
  #ifndef PERFD_SAMPLERS_NETWORK_SPEED_SAMPLER_H_
  #define PERFD_SAMPLERS_NETWORK_SPEED_SAMPLER_H_
  
  #include "perfd/network/network_constants.h"
  #include "perfd/network/speed_sampler.h"
  #include "perfd/samplers/sampler.h"
  #include "perfd/sessions/session.h"
  #include "utils/uid_fetcher.h"
  
  namespace profiler {
  
  // Wrapper for SpeedSampler in the unified data pipeline.
  class NetworkSpeedSampler final : public Sampler {
   public:
    NetworkSpeedSampler(const profiler::Session& session, Clock* clock,
                        EventBuffer* buffer)
        : Sampler(session, buffer, kSampleRateMs),
          uid_(UidFetcher::GetUid(session.info().pid())),
          speed_sampler_(clock, NetworkConstants::GetTrafficBytesFilePath()) {}
  
    virtual void Sample() override;
  
   private:
    static constexpr const char* const kSamplerName = "NET:Speed";
    static const int32_t kSampleRateMs = 500;
  
    virtual const char* name() override { return kSamplerName; }
  
    int32_t uid_;
    SpeedSampler speed_sampler_;
  };
  
  }  // namespace profiler
  
  #endif  // PERFD_SAMPLERS_NETWORK_SPEED_SAMPLER_H_
  