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// Copyright (c) 2011 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.
#ifndef CHROME_BROWSER_PROFILES_PROFILE_DEPENDENCY_MANAGER_H_
#define CHROME_BROWSER_PROFILES_PROFILE_DEPENDENCY_MANAGER_H_
#include <map>
#include <vector>
#include "base/memory/singleton.h"
#ifndef NDEBUG
#include <set>
#endif
class Profile;
class ProfileKeyedServiceFactory;
// A singleton that listens for profile destruction notifications and
// rebroadcasts them to each ProfileKeyedServiceFactory in a safe order based
// on the stated dependencies by each service.
class ProfileDependencyManager {
public:
// Adds/Removes a component from our list of live components. Removing will
// also remove live dependency links.
void AddComponent(ProfileKeyedServiceFactory* component);
void RemoveComponent(ProfileKeyedServiceFactory* component);
// Adds a dependency between two factories.
void AddEdge(ProfileKeyedServiceFactory* depended,
ProfileKeyedServiceFactory* dependee);
// Called by each Profile to alert us of its creation. Several services want
// to be started when a profile is created. Testing configuration is also
// done at this time. (If you want your ProfileKeyedService to be started
// with the Profile, override ProfileKeyedServiceFactory::
// ServiceIsCreatedWithProfile() to return true.)
void CreateProfileServices(Profile* profile, bool is_testing_profile);
// Called by each Profile to alert us that we should destroy services
// associated with it.
//
// Why not use the existing PROFILE_DESTROYED notification?
//
// - Because we need to do everything here after the application has handled
// being notified about PROFILE_DESTROYED.
// - Because this class is a singleton and Singletons can't rely on
// NotificationService in unit tests because NotificationService is
// replaced in many tests.
void DestroyProfileServices(Profile* profile);
#ifndef NDEBUG
// Debugging assertion called as part of GetServiceForProfile in debug
// mode. This will NOTREACHED() whenever the user is trying to access a stale
// Profile*.
void AssertProfileWasntDestroyed(Profile* profile);
#endif
static ProfileDependencyManager* GetInstance();
private:
friend class ProfileDependencyManagerUnittests;
friend struct DefaultSingletonTraits<ProfileDependencyManager>;
typedef std::multimap<ProfileKeyedServiceFactory*,
ProfileKeyedServiceFactory*> EdgeMap;
ProfileDependencyManager();
virtual ~ProfileDependencyManager();
// Using the dependency graph defined in |edges_|, fills |destruction_order_|
// so that Observe() can notify each ProfileKeyedServiceFactory in order.
void BuildDestructionOrder();
std::vector<ProfileKeyedServiceFactory*> all_components_;
EdgeMap edges_;
std::vector<ProfileKeyedServiceFactory*> destruction_order_;
#ifndef NDEBUG
// A list of profile objects that have gone through the Shutdown()
// phase. These pointers are most likely invalid, but we keep track of their
// locations in memory so we can nicely assert if we're asked to do anything
// with them.
std::set<Profile*> dead_profile_pointers_;
#endif
};
#endif // CHROME_BROWSER_PROFILES_PROFILE_DEPENDENCY_MANAGER_H_
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