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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 COMPONENTS_INVALIDATION_ACK_HANDLER_H_
#define COMPONENTS_INVALIDATION_ACK_HANDLER_H_
#include <vector>
#include "components/invalidation/invalidation_export.h"
namespace invalidation {
class ObjectId;
} // namespace invalidation
namespace syncer {
class AckHandle;
// An interface for classes that keep track of invalidation acknowledgements.
//
// We don't expect to support more than one "real" implementation of AckHandler,
// but this interface is very useful for testing and implementation hiding.
class INVALIDATION_EXPORT AckHandler {
public:
AckHandler();
virtual ~AckHandler() = 0;
// Record the local acknowledgement of an invalidation identified by |handle|.
virtual void Acknowledge(const invalidation::ObjectId& id,
const AckHandle& handle) = 0;
// Record the drop of an invalidation identified by |handle|.
virtual void Drop(const invalidation::ObjectId& id,
const AckHandle& handle) = 0;
};
} // namespace syncer
#endif // COMPONENTS_INVALIDATION_ACK_HANDLER_H_
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