130 lines
3.9 KiB
C++
130 lines
3.9 KiB
C++
/*
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----
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This file is part of SECONDO.
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Copyright (C) 2015,
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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 DISTRIBUTION_H_
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#define DISTRIBUTION_H_
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#include "StandardTypes.h"
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#include <string>
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#include <vector>
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#include "boost/thread.hpp"
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#include "boost/date_time.hpp"
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namespace KVS {
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//
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// Keep clients up to date on state of distribution
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//
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class DistributionUpdateListener {
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public:
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virtual ~DistributionUpdateListener() {}
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virtual void distributionUpdated() = 0;
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};
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//
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// Distribution base type to support different types of distributions
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// currently only based on quadtree needs
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//
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class Distribution {
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public:
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enum DistributionType { TYPE_NONE, TYPE_QUADTREE, TYPE_CONSISTENT };
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Distribution(const int& type) : type(type), needsSync(false){};
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Distribution(const int& type, const std::vector<int>& serverIdOrder,
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const std::map<int, int>& serverWeight)
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: type(type),
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serverIdOrder(serverIdOrder),
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serverWeight(serverWeight),
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needsSync(false) {}
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virtual ~Distribution() {}
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static Distribution* getInstance(const std::string& data);
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static const bool checkType(const ListExpr type);
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void addUpdateListener(DistributionUpdateListener* listener);
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void removeUpdateListener(DistributionUpdateListener* listener);
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void distributionUpdated();
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bool needsSynchronisation();
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virtual std::string toBin() = 0;
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virtual bool fromBin(const std::string& data) = 0;
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virtual std::string serverIdAssignment(std::string attributeName,
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std::string distributionName,
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bool requestOnly) = 0;
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virtual int split(int serverId) = 0;
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virtual void redistribute(int serverId,
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int n) = 0; // n: number of servers after serverId
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// (referencing serverIdOrder order)
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virtual int neighbourId(int id) = 0;
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virtual void changeServerId(int oldid, int newid) = 0;
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virtual void resetWeight() = 0;
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virtual void updateWeightVector() = 0;
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virtual void addWeight(Distribution* dist, const int& id) = 0;
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virtual void resetMaxGlobalIds() = 0;
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virtual void addMaxGlobalIds(Distribution* dist, const int& id) = 0;
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virtual bool filter(int nrcoords, double* coords,
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const unsigned int& globalId, bool update) = 0;
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virtual void add(int value, std::set<int>* resultIds) = 0; // int
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virtual void add(int nrcoords, double* coords,
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std::set<int>* resultIds) = 0; // rect
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virtual void addDebug(int nrcoords, double* coords,
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std::set<int>* resultIds) = 0; // rect
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virtual void request(int value, std::set<int>* resultIds) = 0; // int
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virtual void request(int nrcoords, double* coords,
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std::set<int>* resultIds) = 0; // rect
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virtual void requestDebug(int nrcoords, double* coords,
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std::set<int>* resultIds) = 0; // rect
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virtual void createAreaObjectCountList(
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std::list<std::pair<double*, int> >* areaList) = 0;
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int type;
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std::vector<int> serverIdOrder;
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std::map<int, int> serverWeight;
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boost::mutex syncMutex;
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protected:
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std::vector<DistributionUpdateListener*> updateListener;
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bool needsSync;
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};
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}
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#endif /* DISTRIBUTION_H_ */
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