| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef NET_NQE_NETWORK_QUALITIES_PREFS_MANAGER_H_ |
| #define NET_NQE_NETWORK_QUALITIES_PREFS_MANAGER_H_ |
| |
| #include <map> |
| #include <memory> |
| |
| #include "base/macros.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/sequence_checker.h" |
| #include "base/time/time.h" |
| #include "base/values.h" |
| #include "net/base/net_export.h" |
| #include "net/nqe/cached_network_quality.h" |
| #include "net/nqe/effective_connection_type.h" |
| #include "net/nqe/network_id.h" |
| #include "net/nqe/network_quality_store.h" |
| |
| namespace net { |
| class NetworkQualityEstimator; |
| |
| typedef base::Callback<void( |
| const nqe::internal::NetworkID& network_id, |
| const nqe::internal::CachedNetworkQuality& cached_network_quality)> |
| OnChangeInCachedNetworkQualityCallback; |
| |
| typedef std::map<nqe::internal::NetworkID, nqe::internal::CachedNetworkQuality> |
| ParsedPrefs; |
| |
| // Using the provided PrefDelegate, NetworkQualitiesPrefsManager creates and |
| // updates network quality information that is stored in prefs. |
| class NET_EXPORT NetworkQualitiesPrefsManager |
| : public nqe::internal::NetworkQualityStore::NetworkQualitiesCacheObserver { |
| public: |
| // Provides an interface that must be implemented by the embedder. |
| class NET_EXPORT PrefDelegate { |
| public: |
| virtual ~PrefDelegate() {} |
| |
| // Sets the persistent pref to the given value. |
| virtual void SetDictionaryValue(const base::DictionaryValue& value) = 0; |
| |
| // Returns a copy of the persistent prefs. |
| virtual std::unique_ptr<base::DictionaryValue> GetDictionaryValue() = 0; |
| }; |
| |
| // Creates an instance of the NetworkQualitiesPrefsManager. Ownership of |
| // |pref_delegate| is taken by this class. |
| explicit NetworkQualitiesPrefsManager( |
| std::unique_ptr<PrefDelegate> pref_delegate); |
| ~NetworkQualitiesPrefsManager() override; |
| |
| // Initialize on the Network thread. Must be called after pref service has |
| // been initialized, and prefs are ready for reading. |
| void InitializeOnNetworkThread( |
| NetworkQualityEstimator* network_quality_estimator); |
| |
| // Prepare for shutdown. |
| void ShutdownOnPrefSequence(); |
| |
| // Clear the network quality estimator prefs. |
| void ClearPrefs(); |
| |
| // Reads the prefs again, parses them into a map of NetworkIDs and |
| // CachedNetworkQualities, and returns the map. |
| ParsedPrefs ForceReadPrefsForTesting() const; |
| |
| private: |
| // Responsible for writing the persistent prefs to the disk. |
| std::unique_ptr<PrefDelegate> pref_delegate_; |
| |
| // Current prefs on the disk. |
| std::unique_ptr<base::DictionaryValue> prefs_; |
| |
| // nqe::internal::NetworkQualityStore::NetworkQualitiesCacheObserver |
| // implementation: |
| void OnChangeInCachedNetworkQuality( |
| const nqe::internal::NetworkID& network_id, |
| const nqe::internal::CachedNetworkQuality& cached_network_quality) |
| override; |
| |
| NetworkQualityEstimator* network_quality_estimator_; |
| |
| // Network quality prefs read from the disk at the time of startup. |
| ParsedPrefs read_prefs_startup_; |
| |
| SEQUENCE_CHECKER(sequence_checker_); |
| |
| DISALLOW_COPY_AND_ASSIGN(NetworkQualitiesPrefsManager); |
| }; |
| |
| } // namespace net |
| |
| #endif // NET_NQE_NETWORK_QUALITIES_PREFS_MANAGER_H_ |