testsuite::CacheControl Class Reference

#include <userver/testsuite/cache_control.hpp>

Detailed Description

Testsuite interface for caches and cache-like components.

If a component stores transient state that may be carried between tests, or stores caches that may become stale, then it should register its resetter here. Example:

class MyCache final : public components::LoggableComponentBase {
 public:
  static constexpr std::string_view kName = "my-component-default-name";
 
  MyCache(const components::ComponentConfig& config,
          const components::ComponentContext& context)
      : components::LoggableComponentBase(config, context) {
    {
      auto cache = cached_token_.Lock();
      *cache = FetchToken();
    }
    // ...
 
    // reset_registration_ must be set at the end of the constructor.
    reset_registration_ =
        testsuite::RegisterCache(config, context, this, &MyCache::ResetCache);
  }
 
  std::string GetToken() {
    auto cache = cached_token_.Lock();
    if (auto& opt_token = *cache; opt_token) return *opt_token;
    auto new_token = FetchToken();
    *cache = new_token;
    return new_token;
  }
 
  void ReportServiceRejectedToken() { ResetCache(); }
 
 private:
  std::string FetchToken() const;
 
  void ResetCache() {
    auto cache = cached_token_.Lock();
    cache->reset();
  }
 
  concurrent::Variable<std::optional<std::string>> cached_token_;
 
  // Subscriptions must be the last fields.
  testsuite::CacheResetRegistration reset_registration_;
};

Testsuite will then call this hook in the beginning of each test. You can also reset a specific cache in testsuite explicitly as follows:

service_client.invalidate_caches(names=['your-cache-name'])

CacheControl is normally acquired through testsuite::FindCacheControl.

All methods are coro-safe.

Definition at line 54 of file cache_control.hpp.

Public Member Functions
void	ResetAllCaches (cache::UpdateType update_type, const std::unordered_set< std::string > &force_incremental_names, const std::unordered_set< std::string > &exclude_names)
	Reset all the registered caches.
void	ResetCaches (cache::UpdateType update_type, std::unordered_set< std::string > reset_only_names, const std::unordered_set< std::string > &force_incremental_names)
	Reset caches with the specified names.
	CacheControl (CacheControl &&)=delete
CacheControl &	operator= (CacheControl &&)=delete

Member Function Documentation

ResetAllCaches()

void testsuite::CacheControl::ResetAllCaches	(	cache::UpdateType	update_type,
		const std::unordered_set< std::string > &	force_incremental_names,
		const std::unordered_set< std::string > &	exclude_names )

Reset all the registered caches.

update_type is used by caches derived from component::CachingComponentBase.

ResetCaches()

void testsuite::CacheControl::ResetCaches	(	cache::UpdateType	update_type,
		std::unordered_set< std::string >	reset_only_names,
		const std::unordered_set< std::string > &	force_incremental_names )

Reset caches with the specified names.

update_type is used by caches derived from component::CachingComponentBase.

Friends And Related Symbol Documentation

CacheResetRegistration

friend class CacheResetRegistration

friend

Definition at line 105 of file cache_control.hpp.

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The documentation for this class was generated from the following file:

• userver/testsuite/cache_control.hpp