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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_ASH_POLICY_INVALIDATION_AFFILIATED_INVALIDATION_SERVICE_PROVIDER_H_
#define CHROME_BROWSER_ASH_POLICY_INVALIDATION_AFFILIATED_INVALIDATION_SERVICE_PROVIDER_H_
namespace invalidation {
class InvalidationService;
}
namespace policy {
// This class provides access to an |InvalidationService| that can be used to
// subscribe to invalidations generated by the device's enrollment domain, e.g.
// policy pushing and remote commands for:
// * the device itself
// * device-local accounts
// * other users affiliated with the enrollment domain
//
// If an affiliated user with a connected invalidation service is logged in,
// that invalidation service will be used to conserve server resources. If there
// are no logged-in users matching these criteria, a device-global
// |InvalidationService| 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 AffiliatedInvalidationServiceProvider {
public:
class Consumer {
public:
Consumer();
Consumer& operator=(const Consumer&) = delete;
// This method is called when the invalidation service that the consumer
// should use changes:
// * If |invalidation_service| is a nullptr, no invalidation service is
// currently available for use.
// * Otherwise, |invalidation_service| is the invalidation service that the
// consumer should use. It is guaranteed to be connected. Any previously
// provided invalidation services must no longer be used.
virtual void OnInvalidationServiceSet(
invalidation::InvalidationService* invalidation_service) = 0;
protected:
virtual ~Consumer();
};
AffiliatedInvalidationServiceProvider();
AffiliatedInvalidationServiceProvider& operator=(
const AffiliatedInvalidationServiceProvider&) = delete;
virtual ~AffiliatedInvalidationServiceProvider();
// Indicates that |consumer| is interested in using the shared
// |InvalidationService|. The consumer's OnInvalidationServiceSet() method
// will be called back when a connected invalidation service becomes
// available. If an invalidation service is available already, the callback
// will occur synchronously. The |consumer| must be unregistered before |this|
// is destroyed.
virtual void RegisterConsumer(Consumer* consumer) = 0;
// Indicates that |consumer| is no longer interested in using the
// shared |InvalidationService|.
virtual void UnregisterConsumer(Consumer* consumer) = 0;
// Shuts down the provider. Once the provider is shut down, it no longer makes
// any invalidation service available to consumers, no longer observes any
// per-profile invalidation services and no longer maintains a device-global
// invalidation service.
virtual void Shutdown() = 0;
};
} // namespace policy
#endif // CHROME_BROWSER_ASH_POLICY_INVALIDATION_AFFILIATED_INVALIDATION_SERVICE_PROVIDER_H_
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