components/browser_context_keyed_service/browser_context_keyed_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 "components/browser_context_keyed_service/browser_context_keyed_service_factory.h"
   6
   7 #include <map>
   8
   9 #include "base/logging.h"
  10 #include "base/stl_util.h"
  11 #include "components/browser_context_keyed_service/browser_context_dependency_manager.h"
  12 #include "components/browser_context_keyed_service/browser_context_keyed_service.h"
  13 #include "content/public/browser/browser_context.h"
  14
  15 void BrowserContextKeyedServiceFactory::SetTestingFactory(
  16     content::BrowserContext* context, FactoryFunction factory) {
  17   // Destroying the context may cause us to lose data about whether |context|
  18   // has our preferences registered on it (since the context object itself
  19   // isn't dead). See if we need to readd it once we've gone through normal
  20   // destruction.
  21   bool add_context = ArePreferencesSetOn(context);
  22
  23   // We have to go through the shutdown and destroy mechanisms because there
  24   // are unit tests that create a service on a context and then change the
  25   // testing service mid-test.
  26   BrowserContextShutdown(context);
  27   BrowserContextDestroyed(context);
  28
  29   if (add_context)
  30     MarkPreferencesSetOn(context);
  31
  32   factories_[context] = factory;
  33 }
  34
  35 BrowserContextKeyedService*
  36 BrowserContextKeyedServiceFactory::SetTestingFactoryAndUse(
  37     content::BrowserContext* context,
  38     FactoryFunction factory) {
  39   DCHECK(factory);
  40   SetTestingFactory(context, factory);
  41   return GetServiceForBrowserContext(context, true);
  42 }
  43
  44 BrowserContextKeyedServiceFactory::BrowserContextKeyedServiceFactory(
  45     const char* name, BrowserContextDependencyManager* manager)
  46     : BrowserContextKeyedBaseFactory(name, manager) {
  47 }
  48
  49 BrowserContextKeyedServiceFactory::~BrowserContextKeyedServiceFactory() {
  50   DCHECK(mapping_.empty());
  51 }
  52
  53 BrowserContextKeyedService*
  54 BrowserContextKeyedServiceFactory::GetServiceForBrowserContext(
  55     content::BrowserContext* context,
  56     bool create) {
  57   context = GetBrowserContextToUse(context);
  58   if (!context)
  59     return NULL;
  60
  61   // NOTE: If you modify any of the logic below, make sure to update the
  62   // refcounted version in refcounted_context_keyed_service_factory.cc!
  63   BrowserContextKeyedServices::const_iterator it = mapping_.find(context);
  64   if (it != mapping_.end())
  65     return it->second;
  66
  67   // Object not found.
  68   if (!create)
  69     return NULL;  // And we're forbidden from creating one.
  70
  71   // Create new object.
  72   // Check to see if we have a per-BrowserContext testing factory that we should
  73   // use instead of default behavior.
  74   BrowserContextKeyedService* service = NULL;
  75   BrowserContextOverriddenFunctions::const_iterator jt =
  76       factories_.find(context);
  77   if (jt != factories_.end()) {
  78     if (jt->second) {
  79       if (!context->IsOffTheRecord())
  80         RegisterUserPrefsOnBrowserContext(context);
  81       service = jt->second(context);
  82     }
  83   } else {
  84     service = BuildServiceInstanceFor(context);
  85   }
  86
  87   Associate(context, service);
  88   return service;
  89 }
  90
  91 void BrowserContextKeyedServiceFactory::Associate(
  92     content::BrowserContext* context,
  93     BrowserContextKeyedService* service) {
  94   DCHECK(!ContainsKey(mapping_, context));
  95   mapping_.insert(std::make_pair(context, service));
  96 }
  97
  98 void BrowserContextKeyedServiceFactory::BrowserContextShutdown(
  99     content::BrowserContext* context) {
 100   BrowserContextKeyedServices::iterator it = mapping_.find(context);
 101   if (it != mapping_.end() && it->second)
 102     it->second->Shutdown();
 103 }
 104
 105 void BrowserContextKeyedServiceFactory::BrowserContextDestroyed(
 106     content::BrowserContext* context) {
 107   BrowserContextKeyedServices::iterator it = mapping_.find(context);
 108   if (it != mapping_.end()) {
 109     delete it->second;
 110     mapping_.erase(it);
 111   }
 112
 113   // For unit tests, we also remove the factory function both so we don't
 114   // maintain a big map of dead pointers, but also since we may have a second
 115   // object that lives at the same address (see other comments about unit tests
 116   // in this file).
 117   factories_.erase(context);
 118
 119   BrowserContextKeyedBaseFactory::BrowserContextDestroyed(context);
 120 }
 121
 122 void BrowserContextKeyedServiceFactory::SetEmptyTestingFactory(
 123     content::BrowserContext* context) {
 124   SetTestingFactory(context, NULL);
 125 }
 126
 127 void BrowserContextKeyedServiceFactory::CreateServiceNow(
 128     content::BrowserContext* context) {
 129   GetServiceForBrowserContext(context, true);
 130 }