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// Copyright (c) 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 UpdateApplicator is used to iterate over a number of unapplied updates,
// applying them to the client using the given syncer session.
//
// UpdateApplicator might resemble an iterator, but it actually keeps retrying
// failed updates until no remaining updates can be successfully applied.
#ifndef SYNC_ENGINE_UPDATE_APPLICATOR_H_
#define SYNC_ENGINE_UPDATE_APPLICATOR_H_
#include <vector>
#include "base/basictypes.h"
#include "base/port.h"
#include "sync/internal_api/public/engine/model_safe_worker.h"
#include "sync/syncable/syncable_id.h"
#include "sync/sessions/status_controller.h"
namespace syncer {
namespace sessions {
class StatusController;
}
namespace syncable {
class WriteTransaction;
class Entry;
}
class ConflictResolver;
class Cryptographer;
class UpdateApplicator {
public:
UpdateApplicator(Cryptographer* cryptographer);
~UpdateApplicator();
// Attempt to apply the specified updates.
void AttemptApplications(syncable::WriteTransaction* trans,
const std::vector<int64>& handles);
int updates_applied() {
return updates_applied_;
}
int encryption_conflicts() {
return encryption_conflicts_;
}
int hierarchy_conflicts() {
return hierarchy_conflicts_;
}
const std::set<syncable::Id>& simple_conflict_ids() {
return simple_conflict_ids_;
}
private:
// If true, AttemptOneApplication will skip over |entry| and return true.
bool SkipUpdate(const syncable::Entry& entry);
// Used to decrypt sensitive sync nodes.
Cryptographer* cryptographer_;
DISALLOW_COPY_AND_ASSIGN(UpdateApplicator);
int updates_applied_;
int encryption_conflicts_;
int hierarchy_conflicts_;
std::set<syncable::Id> simple_conflict_ids_;
};
} // namespace syncer
#endif // SYNC_ENGINE_UPDATE_APPLICATOR_H_
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