| // Copyright 2013 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_APPS_EPHEMERAL_APP_SERVICE_H_ |
| #define CHROME_BROWSER_APPS_EPHEMERAL_APP_SERVICE_H_ |
| |
| #include <map> |
| #include <set> |
| |
| #include "base/scoped_observer.h" |
| #include "base/timer/timer.h" |
| #include "components/keyed_service/core/keyed_service.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| #include "extensions/browser/extension_registry_observer.h" |
| |
| class Profile; |
| |
| namespace extensions { |
| class Extension; |
| class ExtensionRegistry; |
| } // namespace extensions |
| |
| // Performs the background garbage collection of ephemeral apps. |
| class EphemeralAppService : public KeyedService, |
| public content::NotificationObserver, |
| public extensions::ExtensionRegistryObserver { |
| public: |
| // Returns the instance for the given profile. This is a convenience wrapper |
| // around EphemeralAppServiceFactory::GetForProfile. |
| static EphemeralAppService* Get(Profile* profile); |
| |
| explicit EphemeralAppService(Profile* profile); |
| virtual ~EphemeralAppService(); |
| |
| int ephemeral_app_count() const { return ephemeral_app_count_; } |
| |
| // Constants exposed for testing purposes: |
| |
| // The number of days of inactivity before an ephemeral app will be removed. |
| static const int kAppInactiveThreshold; |
| // If the ephemeral app has been launched within this number of days, it will |
| // definitely not be garbage collected. |
| static const int kAppKeepThreshold; |
| // The maximum number of ephemeral apps to keep cached. Excess may be removed. |
| static const int kMaxEphemeralAppsCount; |
| |
| private: |
| // A map used to order the ephemeral apps by their last launch time. |
| typedef std::multimap<base::Time, std::string> LaunchTimeAppMap; |
| |
| // content::NotificationObserver implementation. |
| virtual void Observe(int type, |
| const content::NotificationSource& source, |
| const content::NotificationDetails& details) OVERRIDE; |
| |
| // extensions::ExtensionRegistryObserver. |
| virtual void OnExtensionWillBeInstalled( |
| content::BrowserContext* browser_context, |
| const extensions::Extension* extension, |
| bool is_update, |
| bool from_ephemeral, |
| const std::string& old_name) OVERRIDE; |
| virtual void OnExtensionUninstalled( |
| content::BrowserContext* browser_context, |
| const extensions::Extension* extension) OVERRIDE; |
| |
| void Init(); |
| void InitEphemeralAppCount(); |
| |
| // Garbage collect ephemeral apps. |
| void TriggerGarbageCollect(const base::TimeDelta& delay); |
| void GarbageCollectApps(); |
| static void GetAppsToRemove(int app_count, |
| const LaunchTimeAppMap& app_launch_times, |
| std::set<std::string>* remove_app_ids); |
| |
| Profile* profile_; |
| |
| content::NotificationRegistrar registrar_; |
| ScopedObserver<extensions::ExtensionRegistry, |
| extensions::ExtensionRegistryObserver> |
| extension_registry_observer_; |
| |
| base::OneShotTimer<EphemeralAppService> garbage_collect_apps_timer_; |
| |
| // The count of cached ephemeral apps. |
| int ephemeral_app_count_; |
| |
| friend class EphemeralAppServiceTest; |
| friend class EphemeralAppServiceBrowserTest; |
| |
| DISALLOW_COPY_AND_ASSIGN(EphemeralAppService); |
| }; |
| |
| #endif // CHROME_BROWSER_APPS_EPHEMERAL_APP_SERVICE_H_ |