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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.
#ifndef CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_CLOUD_POLICY_INVALIDATOR_H_
#define CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_CLOUD_POLICY_INVALIDATOR_H_
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/scoped_vector.h"
#include "content/public/browser/notification_observer.h"
#include "content/public/browser/notification_registrar.h"
namespace invalidation {
class InvalidationService;
class TiclInvalidationService;
}
namespace policy {
class CloudPolicyInvalidator;
// This class provides invalidations for device policy via a
// |CloudPolicyInvalidator| backed by an |InvalidationService|. If an affiliated
// user with a connected invalidation service is logged in, that service is used
// to conserve server resources. If there are no logged-in users matching these
// criteria, a device-global |TiclInvalidationService| is spun up.
// The class monitors the status of the invalidation services and switches
// between them whenever the service currently in use disconnects or the
// device-global invalidation service can be replaced with another service that
// just connected.
class DeviceCloudPolicyInvalidator : public content::NotificationObserver {
public:
DeviceCloudPolicyInvalidator();
virtual ~DeviceCloudPolicyInvalidator();
// content::NotificationObserver:
virtual void Observe(int type,
const content::NotificationSource& source,
const content::NotificationDetails& details) override;
private:
friend class DeviceCloudPolicyInvalidatorTest;
// Helper that monitors the status of a single |InvalidationService|.
class InvalidationServiceObserver;
// Status updates received from |InvalidationServiceObserver|s.
void OnInvalidationServiceConnected(
invalidation::InvalidationService* invalidation_service);
void OnInvalidationServiceDisconnected(
invalidation::InvalidationService* invalidation_service);
// Attempt to create a |CloudPolicyInvalidator| backed by a connected
// invalidation service. If no connected invalidation service is available for
// use, a |CloudPolicyInvalidator| will be created later when a connected
// service becomes available.
// Further ensures that a device-global invalidation service is running iff
// there is no other connected service available for use.
void TryToCreateInvalidator();
// Create a |CloudPolicyInvalidator| backed by the |invalidation_service|.
void CreateInvalidator(
invalidation::InvalidationService* invalidation_service);
// Destroy the current |CloudPolicyInvalidator|, if any.
void DestroyInvalidator();
// Destroy the device-global invalidation service, if any.
void DestroyDeviceInvalidationService();
content::NotificationRegistrar registrar_;
// Device-global invalidation service.
scoped_ptr<invalidation::TiclInvalidationService>
device_invalidation_service_;
// State observer for the device-global invalidation service.
scoped_ptr<InvalidationServiceObserver> device_invalidation_service_observer_;
// State observers for logged-in users' invalidation services.
ScopedVector<InvalidationServiceObserver>
profile_invalidation_service_observers_;
// The invalidation service backing the current |CloudPolicyInvalidator|. NULL
// if no |CloudPolicyInvalidator| exists.
invalidation::InvalidationService* invalidation_service_;
// The highest invalidation version that was handled already.
int64 highest_handled_invalidation_version_;
// The current |CloudPolicyInvalidator|. NULL if no connected invalidation
// service is available.
scoped_ptr<CloudPolicyInvalidator> invalidator_;
DISALLOW_COPY_AND_ASSIGN(DeviceCloudPolicyInvalidator);
};
} // namespace policy
#endif // CHROME_BROWSER_CHROMEOS_POLICY_DEVICE_CLOUD_POLICY_INVALIDATOR_H_
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