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arangodb/arangod/Replication/DatabaseReplicationApplier.h

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2.8 KiB
C++

////////////////////////////////////////////////////////////////////////////////
/// DISCLAIMER
///
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
///
/// Licensed under the Apache License, Version 2.0 (the "License");
/// you may not use this file except in compliance with the License.
/// You may obtain a copy of the License at
///
/// http://www.apache.org/licenses/LICENSE-2.0
///
/// Unless required by applicable law or agreed to in writing, software
/// distributed under the License is distributed on an "AS IS" BASIS,
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
/// See the License for the specific language governing permissions and
/// limitations under the License.
///
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
///
/// @author Jan Steemann
////////////////////////////////////////////////////////////////////////////////
#ifndef ARANGOD_REPLICATION_DATABASE_REPLICATION_APPLIER_H
#define ARANGOD_REPLICATION_DATABASE_REPLICATION_APPLIER_H 1
#include "Basics/Common.h"
#include "Replication/ReplicationApplier.h"
#include "VocBase/voc-types.h"
struct TRI_vocbase_t;
namespace arangodb {
/// @brief replication applier for a single database
class DatabaseReplicationApplier final : public ReplicationApplier {
friend class DatabaseTailingSyncer;
friend class RestReplicationHandler;
public:
explicit DatabaseReplicationApplier(TRI_vocbase_t& vocbase);
DatabaseReplicationApplier(ReplicationApplierConfiguration const& configuration,
TRI_vocbase_t& vocbase);
~DatabaseReplicationApplier();
/// @brief whether or not the applier is the global one
bool isGlobal() const override { return false; }
/// @brief execute the check condition
bool applies() const override;
/// @brief stop the applier and "forget" everything
void forget() override;
/// @brief configure the replication applier
void reconfigure(ReplicationApplierConfiguration const& configuration) override;
/// @brief store the configuration for the applier
void storeConfiguration(bool doSync) override;
/// @brief factory function for creating a database-specific replication
/// applier
static DatabaseReplicationApplier* create(TRI_vocbase_t& vocbase);
/// @brief load a persisted configuration for the applier
static ReplicationApplierConfiguration loadConfiguration(TRI_vocbase_t& vocbase);
std::shared_ptr<InitialSyncer> buildInitialSyncer() const override;
std::shared_ptr<TailingSyncer> buildTailingSyncer(TRI_voc_tick_t initialTick, bool useTick,
TRI_voc_tick_t barrierId) const override;
protected:
std::string getStateFilename() const override;
private:
TRI_vocbase_t& _vocbase;
};
} // namespace arangodb
#endif