src/chrome/browser/chromeos/extensions/install_limiter.h

   1 // Copyright (c) 2013 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 CHROME_BROWSER_CHROMEOS_EXTENSIONS_INSTALL_LIMITER_H_
   6 #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_INSTALL_LIMITER_H_
   7
   8 #include <queue>
   9 #include <set>
  10
  11 #include "base/basictypes.h"
  12 #include "base/compiler_specific.h"
  13 #include "base/files/file_path.h"
  14 #include "base/memory/ref_counted.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "base/timer/timer.h"
  17 #include "chrome/browser/extensions/crx_installer.h"
  18 #include "components/keyed_service/core/keyed_service.h"
  19 #include "content/public/browser/notification_observer.h"
  20 #include "content/public/browser/notification_registrar.h"
  21
  22 namespace extensions {
  23
  24 // InstallLimiter defers big app installs after all small app installs and then
  25 // runs big app installs one by one. This improves first-time login experience.
  26 // See http://crbug.com/166296
  27 class InstallLimiter : public KeyedService,
  28                        public content::NotificationObserver,
  29                        public base::SupportsWeakPtr<InstallLimiter> {
  30  public:
  31   static InstallLimiter* Get(Profile* profile);
  32
  33   InstallLimiter();
  34   virtual ~InstallLimiter();
  35
  36   void DisableForTest();
  37
  38   void Add(const scoped_refptr<CrxInstaller>& installer,
  39            const base::FilePath& path);
  40
  41  private:
  42   // DeferredInstall holds info to run a CrxInstaller later.
  43   struct DeferredInstall {
  44     DeferredInstall(const scoped_refptr<CrxInstaller>& installer,
  45                    const base::FilePath& path);
  46     ~DeferredInstall();
  47
  48     const scoped_refptr<CrxInstaller> installer;
  49     const base::FilePath path;
  50   };
  51
  52   typedef std::queue<DeferredInstall> DeferredInstallList;
  53   typedef std::set<scoped_refptr<CrxInstaller> > CrxInstallerSet;
  54
  55   // Adds install info with size. If |size| is greater than a certain threshold,
  56   // it stores the install info into |deferred_installs_| to run it later.
  57   // Otherwise, it just runs the installer.
  58   void AddWithSize(const scoped_refptr<CrxInstaller>& installer,
  59                    const base::FilePath& path,
  60                    int64 size);
  61
  62   // Checks and runs deferred big app installs when appropriate.
  63   void CheckAndRunDeferrredInstalls();
  64
  65   // Starts install using passed-in info and observes |installer|'s done
  66   // notification.
  67   void RunInstall(const scoped_refptr<CrxInstaller>& installer,
  68                   const base::FilePath& path);
  69
  70   // content::NotificationObserver overrides:
  71   virtual void Observe(int type,
  72                        const content::NotificationSource& source,
  73                        const content::NotificationDetails& details) override;
  74
  75   content::NotificationRegistrar registrar_;
  76
  77   DeferredInstallList deferred_installs_;
  78   CrxInstallerSet running_installers_;
  79
  80   // A timer to wait before running deferred big app install.
  81   base::OneShotTimer<InstallLimiter> wait_timer_;
  82
  83   bool disabled_for_test_;
  84
  85   DISALLOW_COPY_AND_ASSIGN(InstallLimiter);
  86 };
  87
  88 }  // namespace extensions
  89
  90 #endif  // CHROME_BROWSER_CHROMEOS_EXTENSIONS_INSTALL_LIMITER_H_