132 lines
2.8 KiB
C++
132 lines
2.8 KiB
C++
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/*
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1.1 ~ReplicationServer~
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The ~ReplicationServer~ sends a file containing the replica of a relation to a
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~ReplicationClient~ on request.
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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_REPLICATIONSERVER_HPP_
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#define ALGEBRAS_DBSERVICE_REPLICATIONSERVER_HPP_
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#include <iostream>
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#include "QueryProcessor.h"
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#include "Algebras/Relation-C++/RelationAlgebra.h"
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#include "Algebras/Distributed2/FileTransferServer.h"
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#include "Algebras/DBService/MultiClientServer.hpp"
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namespace DBService {
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/*
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1.1.1 Class Implementation
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*/
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class ReplicationServer: public MultiClientServer,
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distributed2::FileTransferServer {
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/*
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1.1.1.1 Constructor
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*/
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public:
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explicit ReplicationServer(int port);
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/*
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1.1.1.1 Destructor
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*/
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~ReplicationServer();
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/*
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1.1.1.1 ~start~
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This function starts the ~ReplicationServer~ and leaves it waiting for incoming
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client connections.
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*/
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int start();
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/*
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1.1.1.1 ~communicate~
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This function is called as soon as a ~ReplicationClient~ establishes a
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connection to the ~ReplicationServer~. It reacts on the incoming messages from
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the client.
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*/
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protected:
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int communicate(){
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return FileTransferServer::communicate();
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}
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int communicate(std::iostream& io);
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/*
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1.1.1.1 ~sendFileToClient~
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This function is called in order to send a file to a client.
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*/
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private:
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void sendFileToClient(
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std::iostream& io,
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bool fileCreated,
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const boost::thread::id tid);
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/*
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1.1.1.1 ~applyFunctionAndCreateNewFile~
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This function applies a function to a tuple stream read from a file and stores
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the resulting tuple stream in a new file.
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*/
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void applyFunctionAndCreateNewFile(
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std::iostream& io,
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const std::string& function,
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std::queue<std::string>& otherObjects,
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const std::string& oldFileName,
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const std::string& newFileName,
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const boost::thread::id tid);
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bool createFileFromRelation(const std::string& filename);
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};
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} /* namespace DBService */
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#endif /* ALGEBRAS_DBSERVICE_REPLICATIONSERVER_HPP_ */
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