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// 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 "apps/app_lifetime_monitor.h"
#include "base/memory/weak_ptr.h"
#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 apps::AppLifetimeMonitor::Observer {
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();
// Clears the ephemeral app cache. Removes all idle ephemeral apps.
void ClearCachedApps();
int ephemeral_app_count() const { return ephemeral_app_count_; }
void set_disable_delay_for_test(int delay) {
disable_idle_app_delay_ = delay;
}
// 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,
extensions::UninstallReason reason) OVERRIDE;
// apps::AppLifetimeMonitor::Observer implementation.
virtual void OnAppStop(Profile* profile, const std::string& app_id) OVERRIDE;
virtual void OnChromeTerminating() OVERRIDE;
void Init();
void InitEphemeralAppCount();
void DisableEphemeralApp(const std::string& app_id);
void DisableEphemeralAppsOnStartup();
void HandleEphemeralAppPromoted(const extensions::Extension* app);
// 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_;
ScopedObserver<apps::AppLifetimeMonitor, apps::AppLifetimeMonitor::Observer>
app_lifetime_monitor_observer_;
base::OneShotTimer<EphemeralAppService> garbage_collect_apps_timer_;
// The count of cached ephemeral apps.
int ephemeral_app_count_;
// Number of seconds before disabling idle ephemeral apps.
// Overridden in tests.
int disable_idle_app_delay_;
base::WeakPtrFactory<EphemeralAppService> weak_ptr_factory_;
friend class EphemeralAppServiceTest;
friend class EphemeralAppServiceBrowserTest;
DISALLOW_COPY_AND_ASSIGN(EphemeralAppService);
};
#endif // CHROME_BROWSER_APPS_EPHEMERAL_APP_SERVICE_H_
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