176 lines
3.4 KiB
C++
176 lines
3.4 KiB
C++
/*
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1.1 ~ReplicationClient~
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The ~ReplicationClient~ connects to a ~ReplicationServer~ and requests the
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~DBService~ worker node, in order to create a replica, or from an arbitrary
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node in the original system, in order to request a replica.
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----
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This file is part of SECONDO.
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Copyright (C) 2017,
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Faculty of Mathematics and Computer Science,
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Database Systems for New Applications.
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SECONDO is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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SECONDO is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with SECONDO; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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----
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*/
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#ifndef ALGEBRAS_DBSERVICE_REPLICATIONCLIENT_HPP_
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#define ALGEBRAS_DBSERVICE_REPLICATIONCLIENT_HPP_
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#include <string>
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#include <vector>
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#include "Algebras/Distributed2/FileTransferClient.h"
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#include "Algebras/DBService/LocationInfo.hpp"
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#include "Algebras/DBService/TraceWriter.hpp"
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namespace DBService {
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/*
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1.1.1 Class Definition
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*/
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class ReplicationClient: public distributed2::FileTransferClient
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{
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public:
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/*
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1.1.1.1 Constructor
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*/
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ReplicationClient(
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std::string& server,
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int port,
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const std::string& fileNameDBS,
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const std::string& fileNameOrigin,
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std::string& databaseName,
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std::string& relationName);
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/*
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1.1.1.1 Destructor
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*/
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~ReplicationClient();
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/*
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1.1.1.1 ~start~
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This function starts the ~ReplicationClient~ by opening the socket connection.
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*/
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int start();
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/*
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1.1.1.1 ~receiveReplica~
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This function is called in order to request the transmission of a replica
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from the original node.
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*/
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int receiveReplica();
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/*
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1.1.1.1 ~requestReplica~
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This function is called in order to request the transmission of a replica from
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the ~DBService~ worker node.
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*/
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int requestReplica(
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const std::string& functionAsNestedListString,
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std::string& fileName,
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const std::vector<std::string>& otherObjects);
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/*
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1.1.1.1 ~reportSuccessfulReplication~
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By calling this function, the ~DBService~ master is notified about the
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successful replication.
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*/
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void reportSuccessfulReplication();
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/*
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1.1.1.1 ~receiveFileFromServer~
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This function is called in order to start the file transfer.
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*/
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private:
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bool receiveFileFromServer();
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/*
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1.1.1.1 ~fileNameDBS~
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Stores the name of the file that contains the replica on the local side.
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*/
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const std::string fileNameDBS;
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/*
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1.1.1.1 ~fileNameOrigin~
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Stores the name of the file that contains the replica on the remote side.
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*/
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std::string fileNameOrigin;
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/*
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1.1.1.1 ~databaseName~
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Stores the database name of the relation.
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*/
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std::string databaseName;
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/*
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1.1.1.1 ~relationName~
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Stores the name of the relation.
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*/
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std::string relationName;
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/*
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1.1.1.1 ~traceWriter~
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Stores a pointer to the ~TraceWriter~ that is needed to write trace files.
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*/
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std::unique_ptr<TraceWriter> traceWriter;
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};
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} /* namespace DBService */
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#endif /* ALGEBRAS_DBSERVICE_REPLICATIONCLIENT_HPP_ */
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