PreferencesManager

chrome/browser/prefs/preferences_connection_manager.h

+// 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 CHROME_BROWSER_PREFS_PREFERENCES_CONNECTION_MANAGER_H_
+#define CHROME_BROWSER_PREFS_PREFERENCES_CONNECTION_MANAGER_H_
+
+#include <vector>
+
+#include "base/macros.h"
+#include "components/keyed_service/core/keyed_service_shutdown_notifier.h"
+#include "mojo/public/cpp/bindings/strong_binding.h"
+#include "services/preferences/public/interfaces/preferences.mojom.h"
+
+// Handles all incoming prefs::mojom::PreferenceManagerRequest, providing a
+// separate PreferencesManager per connection request.
+//
+// Additionally monitors system shutdown to clean up connections to PrefService.
+//
+// TODO(jonross): Observe profile switching and update PreferenceManager
+// connections.
+class PreferencesConnectionManager {
+ public:
+  PreferencesConnectionManager();
+  ~PreferencesConnectionManager();
+
+  // Creates a new PreferencesManager and binds it to |request|.
+  void ProcessRequest(prefs::mojom::PreferencesManagerRequest request);
+
+ private:
+  // mojo::StrongBinding callback:
+  void OnConnectionError(
+      mojo::StrongBindingPtr<prefs::mojom::PreferencesManager> binding);
+
+  // KeyedServiceShutdownNotifier::Subscription callback. Used to cleanup when
+  // the active PrefService is being destroyed.
+  void OnProfileDestroyed();
+
+  // Bindings that automatically cleanup during connection errors.
+  std::vector<mojo::StrongBindingPtr<prefs::mojom::PreferencesManager>>
+      bindings_;
+
+  // Observes shutdown, when PrefService is being destroyed.
+  std::unique_ptr<KeyedServiceShutdownNotifier::Subscription>
+      profile_shutdown_notification_;
+
+  DISALLOW_COPY_AND_ASSIGN(PreferencesConnectionManager);
+};
+
+#endif  // CHROME_BROWSER_PREFS_PREFERENCES_CONNECTION_MANAGER_H_