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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/keyed_service/core/keyed_service_base_factory.h"
#include "base/supports_user_data.h"
#include "base/trace_event/trace_event.h"
#include "components/keyed_service/core/dependency_manager.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/prefs/pref_service.h"
#include "components/user_prefs/user_prefs.h"
void KeyedServiceBaseFactory::RegisterUserPrefsOnContextForTest(
base::SupportsUserData* context) {
TRACE_EVENT0("browser,startup",
"KeyedServiceBaseFactory::RegisterUserPrefsOnContextForTest");
// Safe timing for pref registration is hard. Previously, we made
// context responsible for all pref registration on every service
// that used contexts. Now we don't and there are timing issues.
//
// With normal contexts, prefs can simply be registered at
// DependencyManager::RegisterProfilePrefsForServices time.
// With incognito contexts, we just never register since incognito
// contexts share the same pref services with their parent contexts.
//
// Testing contexts throw a wrench into the mix, in that some tests will
// swap out the PrefService after we've registered user prefs on the original
// PrefService. Test code that does this is responsible for either manually
// invoking RegisterProfilePrefs() on the appropriate
// ContextKeyedServiceFactory associated with the prefs they need,
// or they can use SetTestingFactory() and create a service (since service
// creation with a factory method causes registration to happen at
// TestingProfile creation time).
//
// Now that services are responsible for declaring their preferences, we have
// to enforce a uniquenes check here because some tests create one context and
// multiple services of the same type attached to that context (serially, not
// parallel) and we don't want to register multiple times on the same context.
// This is the purpose of RegisterPrefsIfNecessaryForContext() which could be
// replaced directly by RegisterPrefs() if this method is ever phased out.
RegisterPrefsIfNecessaryForContext(context,
GetAssociatedPrefRegistry(context));
}
KeyedServiceBaseFactory::KeyedServiceBaseFactory(const char* service_name,
DependencyManager* manager)
: dependency_manager_(manager) {
#ifndef NDEBUG
service_name_ = service_name;
#endif
dependency_manager_->AddComponent(this);
}
KeyedServiceBaseFactory::~KeyedServiceBaseFactory() {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
dependency_manager_->RemoveComponent(this);
}
void KeyedServiceBaseFactory::DependsOn(KeyedServiceBaseFactory* rhs) {
dependency_manager_->AddEdge(rhs, this);
}
void KeyedServiceBaseFactory::RegisterPrefsIfNecessaryForContext(
base::SupportsUserData* context,
user_prefs::PrefRegistrySyncable* registry) {
if (!ArePreferencesSetOn(context)) {
RegisterPrefs(registry);
MarkPreferencesSetOn(context);
}
}
user_prefs::PrefRegistrySyncable*
KeyedServiceBaseFactory::GetAssociatedPrefRegistry(
base::SupportsUserData* context) const {
PrefService* prefs = user_prefs::UserPrefs::Get(context);
user_prefs::PrefRegistrySyncable* registry =
static_cast<user_prefs::PrefRegistrySyncable*>(
prefs->DeprecatedGetPrefRegistry());
return registry;
}
void KeyedServiceBaseFactory::AssertContextWasntDestroyed(
base::SupportsUserData* context) const {
// TODO(crbug.com/701326): We should DCHECK(CalledOnValidThread()) here, but
// currently some code doesn't do service getting on the main thread.
// This needs to be fixed and DCHECK should be restored here.
dependency_manager_->AssertContextWasntDestroyed(context);
}
void KeyedServiceBaseFactory::MarkContextLive(base::SupportsUserData* context) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
dependency_manager_->MarkContextLive(context);
}
bool KeyedServiceBaseFactory::ServiceIsCreatedWithContext() const {
return false;
}
bool KeyedServiceBaseFactory::ServiceIsNULLWhileTesting() const {
return false;
}
void KeyedServiceBaseFactory::ContextDestroyed(
base::SupportsUserData* context) {
// While object destruction can be customized in ways where the object is
// only dereferenced, this still must run on the UI thread.
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
registered_preferences_.erase(context);
}
bool KeyedServiceBaseFactory::ArePreferencesSetOn(
base::SupportsUserData* context) const {
return registered_preferences_.find(context) != registered_preferences_.end();
}
void KeyedServiceBaseFactory::MarkPreferencesSetOn(
base::SupportsUserData* context) {
DCHECK(!ArePreferencesSetOn(context));
registered_preferences_.insert(context);
}
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