chrome/browser/chromeos/settings/device_oauth2_token_service_factory.cc

   1 // Copyright (c) 2012 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 #include "chrome/browser/chromeos/settings/device_oauth2_token_service_factory.h"
   6
   7 #include "base/bind.h"
   8 #include "base/callback.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/tracked_objects.h"
  11 #include "chrome/browser/browser_process.h"
  12 #include "chrome/browser/chromeos/settings/device_oauth2_token_service.h"
  13 #include "chrome/browser/chromeos/settings/token_encryptor.h"
  14 #include "chromeos/cryptohome/system_salt_getter.h"
  15 #include "content/public/browser/browser_thread.h"
  16
  17 namespace chromeos {
  18 namespace {
  19
  20 DeviceOAuth2TokenServiceFactory* g_factory = NULL;
  21
  22 }  // namespace
  23
  24 DeviceOAuth2TokenServiceFactory::DeviceOAuth2TokenServiceFactory()
  25     : initialized_(false),
  26       token_service_(NULL),
  27       weak_ptr_factory_(this) {
  28 }
  29
  30 DeviceOAuth2TokenServiceFactory::~DeviceOAuth2TokenServiceFactory() {
  31   delete token_service_;
  32 }
  33
  34 // static
  35 void DeviceOAuth2TokenServiceFactory::Get(const GetCallback& callback) {
  36   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  37
  38   if (!g_factory) {
  39     base::MessageLoop::current()->PostTask(
  40         FROM_HERE,
  41         base::Bind(callback,
  42                    static_cast<DeviceOAuth2TokenService*>(NULL)));
  43     return;
  44   }
  45
  46   g_factory->RunAsync(callback);
  47 }
  48
  49 // static
  50 void DeviceOAuth2TokenServiceFactory::Initialize() {
  51   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  52
  53   DCHECK(!g_factory);
  54   g_factory = new DeviceOAuth2TokenServiceFactory;
  55   g_factory->CreateTokenService();
  56 }
  57
  58 // static
  59 void DeviceOAuth2TokenServiceFactory::Shutdown() {
  60   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  61
  62   if (g_factory) {
  63     delete g_factory;
  64     g_factory = NULL;
  65   }
  66 }
  67
  68 void DeviceOAuth2TokenServiceFactory::CreateTokenService() {
  69   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  70
  71   SystemSaltGetter::Get()->GetSystemSalt(
  72       base::Bind(&DeviceOAuth2TokenServiceFactory::DidGetSystemSalt,
  73                  weak_ptr_factory_.GetWeakPtr()));
  74 }
  75
  76 void DeviceOAuth2TokenServiceFactory::DidGetSystemSalt(
  77     const std::string& system_salt) {
  78   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  79   DCHECK(!token_service_);
  80
  81   if (system_salt.empty()) {
  82     LOG(ERROR) << "Failed to get the system salt";
  83   } else {
  84     token_service_= new DeviceOAuth2TokenService(
  85         g_browser_process->system_request_context(),
  86         g_browser_process->local_state(),
  87         new CryptohomeTokenEncryptor(system_salt));
  88   }
  89   // Mark that the factory is initialized.
  90   initialized_ = true;
  91
  92   // Run callbacks regardless of whether token_service_ is created or not,
  93   // but don't run callbacks immediately. Each callback would cause an
  94   // interesting action, hence running them consecutively could be
  95   // potentially expensive and dangerous.
  96   while (!pending_callbacks_.empty()) {
  97     base::MessageLoop::current()->PostTask(
  98         FROM_HERE,
  99         base::Bind(pending_callbacks_.front(), token_service_));
 100     pending_callbacks_.pop();
 101   }
 102 }
 103
 104 void DeviceOAuth2TokenServiceFactory::RunAsync(const GetCallback& callback) {
 105   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 106
 107   if (initialized_) {
 108     base::MessageLoop::current()->PostTask(
 109         FROM_HERE,
 110         base::Bind(callback, token_service_));
 111     return;
 112   }
 113
 114   pending_callbacks_.push(callback);
 115 }
 116
 117 }  // namespace chromeos