components/keyed_service/content/browser_context_keyed_service_factory.cc

   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 #include "components/keyed_service/content/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/keyed_service/content/browser_context_dependency_manager.h"
  12 #include "components/keyed_service/core/keyed_service.h"
  13 #include "content/public/browser/browser_context.h"
  14
  15 void BrowserContextKeyedServiceFactory::SetTestingFactory(
  16     content::BrowserContext* context,
  17     TestingFactoryFunction testing_factory) {
  18   // Destroying the context may cause us to lose data about whether |context|
  19   // has our preferences registered on it (since the context object itself
  20   // isn't dead). See if we need to readd it once we've gone through normal
  21   // destruction.
  22   bool add_context = ArePreferencesSetOn(context);
  23
  24 #ifndef NDEBUG
  25   // Ensure that |context| is not marked as stale (e.g., due to it aliasing an
  26   // instance that was destroyed in an earlier test) in order to avoid accesses
  27   // to |context| in |BrowserContextShutdown| from causing
  28   // |AssertBrowserContextWasntDestroyed| to raise an error.
  29   dependency_manager_->MarkBrowserContextLiveForTesting(context);
  30 #endif
  31
  32   // We have to go through the shutdown and destroy mechanisms because there
  33   // are unit tests that create a service on a context and then change the
  34   // testing service mid-test.
  35   BrowserContextShutdown(context);
  36   BrowserContextDestroyed(context);
  37
  38   if (add_context)
  39     MarkPreferencesSetOn(context);
  40
  41   testing_factories_[context] = testing_factory;
  42 }
  43
  44 KeyedService* BrowserContextKeyedServiceFactory::SetTestingFactoryAndUse(
  45     content::BrowserContext* context,
  46     TestingFactoryFunction testing_factory) {
  47   DCHECK(testing_factory);
  48   SetTestingFactory(context, testing_factory);
  49   return GetServiceForBrowserContext(context, true);
  50 }
  51
  52 BrowserContextKeyedServiceFactory::BrowserContextKeyedServiceFactory(
  53     const char* name,
  54     BrowserContextDependencyManager* manager)
  55     : BrowserContextKeyedBaseFactory(name, manager) {}
  56
  57 BrowserContextKeyedServiceFactory::~BrowserContextKeyedServiceFactory() {
  58   DCHECK(mapping_.empty());
  59 }
  60
  61 KeyedService* BrowserContextKeyedServiceFactory::GetServiceForBrowserContext(
  62     content::BrowserContext* context,
  63     bool create) {
  64   context = GetBrowserContextToUse(context);
  65   if (!context)
  66     return NULL;
  67
  68   // NOTE: If you modify any of the logic below, make sure to update the
  69   // refcounted version in refcounted_context_keyed_service_factory.cc!
  70   BrowserContextKeyedServices::const_iterator it = mapping_.find(context);
  71   if (it != mapping_.end())
  72     return it->second;
  73
  74   // Object not found.
  75   if (!create)
  76     return NULL;  // And we're forbidden from creating one.
  77
  78   // Create new object.
  79   // Check to see if we have a per-BrowserContext testing factory that we should
  80   // use instead of default behavior.
  81   KeyedService* service = NULL;
  82   BrowserContextOverriddenTestingFunctions::const_iterator jt =
  83       testing_factories_.find(context);
  84   if (jt != testing_factories_.end()) {
  85     if (jt->second) {
  86       if (!context->IsOffTheRecord())
  87         RegisterUserPrefsOnBrowserContextForTest(context);
  88       service = jt->second(context);
  89     }
  90   } else {
  91     service = BuildServiceInstanceFor(context);
  92   }
  93
  94   Associate(context, service);
  95   return service;
  96 }
  97
  98 void BrowserContextKeyedServiceFactory::Associate(
  99     content::BrowserContext* context,
 100     KeyedService* service) {
 101   DCHECK(!ContainsKey(mapping_, context));
 102   mapping_.insert(std::make_pair(context, service));
 103 }
 104
 105 void BrowserContextKeyedServiceFactory::Disassociate(
 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
 114 void BrowserContextKeyedServiceFactory::BrowserContextShutdown(
 115     content::BrowserContext* context) {
 116   BrowserContextKeyedServices::iterator it = mapping_.find(context);
 117   if (it != mapping_.end() && it->second)
 118     it->second->Shutdown();
 119 }
 120
 121 void BrowserContextKeyedServiceFactory::BrowserContextDestroyed(
 122     content::BrowserContext* context) {
 123   Disassociate(context);
 124
 125   // For unit tests, we also remove the factory function both so we don't
 126   // maintain a big map of dead pointers, but also since we may have a second
 127   // object that lives at the same address (see other comments about unit tests
 128   // in this file).
 129   testing_factories_.erase(context);
 130
 131   BrowserContextKeyedBaseFactory::BrowserContextDestroyed(context);
 132 }
 133
 134 void BrowserContextKeyedServiceFactory::SetEmptyTestingFactory(
 135     content::BrowserContext* context) {
 136   SetTestingFactory(context, NULL);
 137 }
 138
 139 void BrowserContextKeyedServiceFactory::CreateServiceNow(
 140     content::BrowserContext* context) {
 141   GetServiceForBrowserContext(context, true);
 142 }