CachingAssetAccessor.h

#pragma once
 
#include "IAssetAccessor.h"
#include "IAssetRequest.h"
#include "ICacheDatabase.h"
#include "ThreadPool.h"
 
#include <spdlog/fwd.h>
 
#include <atomic>
#include <cstddef>
#include <memory>
#include <string>
 
namespace CesiumAsync {
class AsyncSystem;
 
class CachingAssetAccessor : public IAssetAccessor {
public:
  CachingAssetAccessor(
      const std::shared_ptr<spdlog::logger>& pLogger,
      const std::shared_ptr<IAssetAccessor>& pAssetAccessor,
      const std::shared_ptr<ICacheDatabase>& pCacheDatabase,
      int32_t requestsPerCachePrune = 10000);
 
  virtual ~CachingAssetAccessor() noexcept override;
 
  virtual Future<std::shared_ptr<IAssetRequest>>
  get(const AsyncSystem& asyncSystem,
      const std::string& url,
      const std::vector<THeader>& headers) override;
 
  virtual Future<std::shared_ptr<IAssetRequest>> request(
      const AsyncSystem& asyncSystem,
      const std::string& verb,
      const std::string& url,
      const std::vector<THeader>& headers,
      const std::span<const std::byte>& contentPayload) override;
 
  virtual void tick() noexcept override;
 
private:
  int32_t _requestsPerCachePrune;
  std::atomic<int32_t> _requestSinceLastPrune;
  std::shared_ptr<spdlog::logger> _pLogger;
  std::shared_ptr<IAssetAccessor> _pAssetAccessor;
  std::shared_ptr<ICacheDatabase> _pCacheDatabase;
  ThreadPool _cacheThreadPool;
  CESIUM_TRACE_DECLARE_TRACK_SET(_pruneSlots, "Prune cache database")
};
} // namespace CesiumAsync