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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #ifndef SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_MANAGER_IMPL_H_ |
| 6 #define SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_MANAGER_IMPL_H_ |
| 7 |
| 8 #include "base/compiler_specific.h" |
| 9 #include "base/macros.h" |
| 10 #include "base/memory/ref_counted.h" |
| 11 #include "components/prefs/pref_value_store.h" |
| 12 #include "mojo/public/cpp/bindings/binding_set.h" |
| 13 #include "services/preferences/public/interfaces/preferences.mojom.h" |
| 14 #include "services/service_manager/public/cpp/interface_factory.h" |
| 15 #include "services/service_manager/public/cpp/service.h" |
| 16 |
| 17 namespace prefs { |
| 18 |
| 19 // This class mediates the connection of clients who wants to read preferences |
| 20 // and the pref stores that store those preferences. Pref stores use the |
| 21 // |PrefStoreRegistry| interface to register themselves with the manager and |
| 22 // clients use the |PrefStoreConnector| interface to connect to these stores. |
| 23 class PrefStoreManagerImpl |
| 24 : public mojom::PrefStoreRegistry, |
| 25 public mojom::PrefStoreConnector, |
| 26 public service_manager::InterfaceFactory<mojom::PrefStoreConnector>, |
| 27 public service_manager::InterfaceFactory<mojom::PrefStoreRegistry>, |
| 28 public service_manager::Service { |
| 29 public: |
| 30 using PrefStoreTypes = std::set<PrefValueStore::PrefStoreType>; |
| 31 |
| 32 // Only replies to Connect calls when all |expected_pref_stores| have |
| 33 // registered. |
| 34 explicit PrefStoreManagerImpl(PrefStoreTypes expected_pref_stores); |
| 35 ~PrefStoreManagerImpl() override; |
| 36 |
| 37 private: |
| 38 using PrefStorePtrs = |
| 39 std::unordered_map<PrefValueStore::PrefStoreType, mojom::PrefStorePtr>; |
| 40 |
| 41 // mojom::PrefStoreRegistry: |
| 42 void Register(PrefValueStore::PrefStoreType type, |
| 43 mojom::PrefStorePtr pref_store_ptr) override; |
| 44 |
| 45 // mojom::PrefStoreConnector: |
| 46 void Connect(const ConnectCallback& callback) override; |
| 47 |
| 48 // service_manager::InterfaceFactory<PrefStoreConnector>: |
| 49 void Create(const service_manager::Identity& remote_identity, |
| 50 prefs::mojom::PrefStoreConnectorRequest request) override; |
| 51 |
| 52 // service_manager::InterfaceFactory<PrefStoreRegistry>: |
| 53 void Create(const service_manager::Identity& remote_identity, |
| 54 prefs::mojom::PrefStoreRegistryRequest request) override; |
| 55 |
| 56 // service_manager::Service: |
| 57 void OnStart() override; |
| 58 bool OnConnect(const service_manager::ServiceInfo& remote_info, |
| 59 service_manager::InterfaceRegistry* registry) override; |
| 60 |
| 61 // Called when a PrefStore previously registered using |Register| disconnects. |
| 62 void OnPrefStoreDisconnect(PrefValueStore::PrefStoreType type); |
| 63 |
| 64 // Have all the expected PrefStores connected? |
| 65 bool AllConnected() const; |
| 66 |
| 67 // PrefStores that need to register before replying to any Connect calls. |
| 68 PrefStoreTypes expected_pref_stores_; |
| 69 |
| 70 // Registered pref stores. |
| 71 PrefStorePtrs pref_store_ptrs_; |
| 72 |
| 73 mojo::BindingSet<mojom::PrefStoreConnector> connector_bindings_; |
| 74 mojo::BindingSet<mojom::PrefStoreRegistry> registry_bindings_; |
| 75 |
| 76 // We hold on to the connection request callbacks until all expected |
| 77 // PrefStores have registered. |
| 78 std::vector<ConnectCallback> pending_callbacks_; |
| 79 |
| 80 DISALLOW_COPY_AND_ASSIGN(PrefStoreManagerImpl); |
| 81 }; |
| 82 |
| 83 } // namespace prefs |
| 84 |
| 85 #endif // SERVICES_PREFERENCES_PUBLIC_CPP_PREF_STORE_MANAGER_IMPL_H_ |
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