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// Copyright 2012 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.
//
// An InvalidationStateTracker is an interface that handles persisting state
// needed for invalidations. Currently, it is responsible for managing the
// following information:
// - Max version seen from the invalidation server to help dedupe invalidations.
// - Bootstrap data for the invalidation client.
// - Payloads and locally generated ack handles, to support local acking.
#ifndef SYNC_NOTIFIER_INVALIDATION_STATE_TRACKER_H_
#define SYNC_NOTIFIER_INVALIDATION_STATE_TRACKER_H_
#include <map>
#include <string>
#include "base/basictypes.h"
#include "base/callback_forward.h"
#include "base/memory/ref_counted.h"
#include "google/cacheinvalidation/include/types.h"
#include "sync/base/sync_export.h"
#include "sync/internal_api/public/base/invalidation.h"
#include "sync/notifier/invalidation_util.h"
#include "sync/notifier/unacked_invalidation_set.h"
namespace base {
class TaskRunner;
} // namespace base
namespace syncer {
class InvalidationStateTracker {
public:
InvalidationStateTracker() {}
// The per-client unique ID used to register the invalidation client with the
// server. This is used to squelch invalidation notifications that originate
// from changes made by this client.
virtual void SetInvalidatorClientId(const std::string& data) = 0;
virtual std::string GetInvalidatorClientId() const = 0;
// Used by invalidation::InvalidationClient for persistence. |data| is an
// opaque blob that an invalidation client can use after a restart to
// bootstrap itself. |data| is binary data (not valid UTF8, embedded nulls,
// etc).
virtual void SetBootstrapData(const std::string& data) = 0;
virtual std::string GetBootstrapData() const = 0;
// Used to store invalidations that have been acked to the server, but not yet
// handled by our clients. We store these invalidations on disk so we won't
// lose them if we need to restart.
virtual void SetSavedInvalidations(const UnackedInvalidationsMap& states) = 0;
virtual UnackedInvalidationsMap GetSavedInvalidations() const = 0;
// Erases invalidation versions, client ID, and state stored on disk.
virtual void Clear() = 0;
protected:
virtual ~InvalidationStateTracker() {}
};
} // namespace syncer
#endif // SYNC_NOTIFIER_INVALIDATION_STATE_TRACKER_H_
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