chrome/browser/extensions/updater/extension_cache_impl.h

   1 // Copyright 2014 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_EXTENSIONS_UPDATER_EXTENSION_CACHE_IMPL_H_
   6 #define CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_CACHE_IMPL_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/callback_forward.h"
  13 #include "base/files/file_path.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "chrome/browser/extensions/updater/extension_cache.h"
  17 #include "content/public/browser/notification_observer.h"
  18 #include "content/public/browser/notification_registrar.h"
  19
  20 template <typename T> struct DefaultSingletonTraits;
  21
  22 namespace extensions {
  23
  24 class LocalExtensionCache;
  25
  26 // Singleton call that caches extensions .crx files to share them between
  27 // multiple users and profiles on the machine.
  28 class ExtensionCacheImpl : public ExtensionCache,
  29                            public content::NotificationObserver {
  30  public:
  31   static ExtensionCacheImpl* GetInstance();
  32
  33   // Implementation of ExtensionCache.
  34   virtual void Start(const base::Closure& callback) OVERRIDE;
  35   virtual void Shutdown(const base::Closure& callback) OVERRIDE;
  36   virtual void AllowCaching(const std::string& id) OVERRIDE;
  37   virtual bool GetExtension(const std::string& id,
  38                             base::FilePath* file_path,
  39                             std::string* version) OVERRIDE;
  40   virtual void PutExtension(const std::string& id,
  41                             const base::FilePath& file_path,
  42                             const std::string& version,
  43                             const PutExtensionCallback& callback) OVERRIDE;
  44
  45   // Implementation of content::NotificationObserver:
  46   virtual void Observe(int type,
  47                        const content::NotificationSource& source,
  48                        const content::NotificationDetails& details) OVERRIDE;
  49
  50  private:
  51   friend struct DefaultSingletonTraits<ExtensionCacheImpl>;
  52
  53   ExtensionCacheImpl();
  54   virtual ~ExtensionCacheImpl();
  55
  56   // Callback that is called when local cache is ready.
  57   void OnCacheInitialized();
  58
  59   // Weak factory for callbacks.
  60   base::WeakPtrFactory<ExtensionCacheImpl> weak_ptr_factory_;
  61
  62   // Cache implementation that uses local cache dir.
  63   scoped_ptr<LocalExtensionCache> cache_;
  64
  65   // Set of extensions that can be cached.
  66   std::set<std::string> allowed_extensions_;
  67
  68   // List of callbacks that should be called when the cache is ready.
  69   std::vector<base::Closure> init_callbacks_;
  70
  71   // Observes failures to install CRX files.
  72   content::NotificationRegistrar notification_registrar_;
  73
  74   DISALLOW_COPY_AND_ASSIGN(ExtensionCacheImpl);
  75 };
  76
  77 }  // namespace extensions
  78
  79 #endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_CACHE_IMPL_H_