DistRoundRobin.h

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/* 
 * File:   DistRoundRobin.h
 * Author: fermat
 *
 * Created on 14. April 2010, 11:17
 */

#ifndef _DISTROUNDROBIN_H
#define _DISTROUNDROBIN_H

#include "Distributor.h"
#include "ImprovedMap.h"
#include<tr1/unordered_map>

namespace VDRIVE {

    class DistRoundRobin : public Distributor {
    public:
        DistRoundRobin(xercesc::DOMElement* data);

        DistRoundRobin(int argc, char** argv);

        DistRoundRobin(const DistRoundRobin& orig);

        virtual ~DistRoundRobin();

        virtual std::list<Disk*>* placeExtent(int64_t virtualVolumeId, int64_t position) ;

        virtual void setConfiguration(std::list<Disk*>* disks, int64_t extentsize, int32_t copies);

        virtual void setDisks(std::list<Disk*>* disks);

        virtual xercesc::DOMElement* toXML(xercesc::DOMDocument* doc) const;

        virtual std::list<Disk*>* getDisks() const;

        virtual int64_t getExtentsize() const {
            return extentsize;
        }

        virtual int32_t getCopies() const {
            return copies;
        }

        static std::string getXMLRootType() {
            return std::string("RoundRobin");
        }
    private:
        int64_t extentsize;

        int32_t copies;

        bool useHash;

        bool useIM;

        ImprovedMap* map;
        
        std::tr1::unordered_map<uint64_t, Disk*>* disks;

        uint64_t numDisks;

        int64_t hashPosition(int64_t position) const;
    };
}
#endif  /* _DISTROUNDROBIN_H */