146 lines
3.5 KiB
C++
146 lines
3.5 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2004, University in Hagen, Department of 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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//paragraph [1] Title: [{\Large \bf \begin{center}] [\end{center}}]
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//characters [1] Type: [] []
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//characters [2] Type: [] []
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//[ae] [\"{a}]
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//[oe] [\"{o}]
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//[ue] [\"{u}]
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//[ss] [{\ss}]
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//[Ae] [\"{A}]
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//[Oe] [\"{O}]
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//[Ue] [\"{U}]
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//[x] [$\times $]
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//[->] [$\rightarrow $]
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//[toc] [\tableofcontents]
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[1] Implementation of class ProvideTupleTypesServer.
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[toc]
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1 ProvideTupleTypesServer implementation
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*/
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#include <iostream>
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#include <string>
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#include "Algebras/DBService/CommunicationUtils.hpp"
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#include "ProvideTupleTypesServer.h"
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#include "ProvideTupleTypesProtocol.h"
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#include "VTHelpers.h"
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namespace cstream {
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/*
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1.1 Constructor
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With default cache size 1.
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*/
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ProvideTupleTypesServer::ProvideTupleTypesServer
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(const int port) :
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StreamMultiClientServer(port) {
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LOG << "ProvideTupleTypesServer::ProvideTupleTypesServer" << ENDL;
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LOG << "Initializing ProvideTupleTypesServer" << ENDL;
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LOG << port << ENDL;
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_cache = new LRUCache(1);
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}
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/*
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1.2 Constructor
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With a given cache size.
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*/
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ProvideTupleTypesServer::ProvideTupleTypesServer
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(const int port, const size_t cache) :
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StreamMultiClientServer(port) {
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LOG << "ProvideTupleTypesServer::ProvideTupleTypesServer" << ENDL;
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LOG << "Initializing ProvideTupleTypesServer" << ENDL;
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LOG << port << ENDL;
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_cache = new LRUCache(cache);
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}
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/*
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1.2 Destructor
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*/
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ProvideTupleTypesServer::~ProvideTupleTypesServer() {
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LOG << "ProvideTupleTypesServer::~ProvideTupleTypesServer" << ENDL;
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stopServer();
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delete _cache;
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}
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/*
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2 functions
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2.1 start
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Starts the server.
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*/
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int ProvideTupleTypesServer::start() {
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LOG << "ProvideTupleTypesServer::start" << ENDL;
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return StreamMultiClientServer::start();
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}
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/*
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2.2 communicate
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Communication of the worker threads with the connected clients.
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*/
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int ProvideTupleTypesServer::communicate(std::iostream& io) {
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LOG << "ProvideTupleTypesServer::communicate" << ENDL;
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//const boost::thread::id tid = boost::this_thread::get_id();
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int numOfTuples;
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std::string request;
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DBService::CommunicationUtils::receiveLine(io, request);
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LOG << "Query to the server: " << ENDL;
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LOG << request << ENDL;
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if(ProvideTupleTypesProtocol::requestTupleTypes(request, numOfTuples)) {
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LOG << "Request OK" << ENDL;
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LOG << "Number of Tuples requested:" << ENDL;
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LOG << numOfTuples << ENDL;
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_cache->sendCache(io, numOfTuples);
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DBService::CommunicationUtils::sendLine(io,
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ProvideTupleTypesProtocol::requestDone());
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}
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else {
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LOG << "Request not OK" << ENDL;
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}
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return 0;
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}
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/*
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2.3 addTupleDescr
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Add a ~tupledescr~ to the cache.
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*/
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void ProvideTupleTypesServer::addTupleDescr(TupleDescr* td) {
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_cache->insert(td->GetString());
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}
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}; |