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CacheManager.hpp

00001  /***********************************************************************
00002  *                                                                      *
00003  * ViTooKi                                                              *
00004  *                                                                      *
00005  * title:       CacheManager.hpp                                              *
00006  *                                                                      *
00007  *                                                                      *
00008  *                                                                      *
00009  * ITEC institute of the University of Klagenfurt (Austria)             *
00010  * http://www.itec.uni-klu.ac.at                                        *
00011  *                                                                      *
00012  *                                                                      *
00013  * For more information visit the ViTooKi homepage:                     *
00014  * http://ViTooKi.sourceforge.net                                       *
00015  * vitooki-user@lists.sourceforge.net                                   *
00016  * vitooki-devel@lists.sourceforge.net                                  *
00017  *                                                                      *
00018  * This file is part of ViTooKi, a free video toolkit.                  *
00019  * ViTooKi is free software; you can redistribute it and/or             *
00020  * modify it under the terms of the GNU General Public License          *
00021  * as published by the Free Software Foundation; either version 2       *
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00023  *                                                                      *
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00025  * but WITHOUT ANY WARRANTY; without even the implied warranty of       *
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00027  * GNU General Public License for more details.                         *
00028  *                                                                      *
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00032  * MA  02111-1307, USA.                                                 *
00033  *                                                                      *
00034  ***********************************************************************/
00035 
00036  /***********************************************************************
00037  *                                                                      *
00038  *  REVISION HISTORY:                                                   *
00039  *                                                                      *
00040  *                                                                      *
00041  *                                                                      *
00042  ***********************************************************************/
00043 
00044 // Definition: Abstract Cache Manager Class //
00045 
00046 #ifndef _CACHEMANAGER_HPP_
00047 #define _CACHEMANAGER_HPP_
00048 
00049 #include "global.hpp"
00050 #ifdef ISOMP4
00051 #include "ISOMovies.h"
00052 #endif
00053 #include "VMutex.hpp"
00054 #include "net/ProxySession.hpp"
00055 class ContainerInfo;
00056 class Url;
00057 class MetaObject;
00058 
00070 class CacheManager {
00071 protected:
00072     u32 cacheSize;
00073     u32 actSize;
00074     u32 requests;
00075     u32 hits;
00076     u64 byteRequested;
00077     u64 byteHits;
00078     double qualityHits;
00079     VMutex lock;
00084                 bool serverMode;
00088     virtual bool replace(bool testPriorDelete) = 0;
00089 public:
00090         virtual ~ CacheManager() {};
00091         virtual void putVideo(ContainerInfo * video,u32 dskSpaceReserved=0) = 0;
00092         virtual ContainerInfo *getVideo(const Url *URL) = 0;
00093         virtual MetaObject* findMetaObject(const Url* url)=0;
00094         virtual void deleteMetaObject(const Url* url)=0 ;
00095         virtual u32 getCacheSize() {
00096                 return cacheSize;
00097         };
00098         virtual u32 getMaxObjectSize() {
00099                 return cacheSize;
00100         }
00101         void lockCache() {lock.lock();};
00102         void unlockCache() {lock.release();};
00106         bool reserveDiskSpace(u32 dskSpace) {
00107                 prxStat.insertsIntoCM++;
00108                 if(dskSpace<getMaxObjectSize()) {
00109                         actSize+=dskSpace;
00110                         if(replace(true)) {
00111                                 return true;
00112                         }
00113                         prxStat.rejectedDueToLocking++;
00114                         actSize-=dskSpace;
00115                 }
00116                 else {
00117                         prxStat.rejectedDueToSize++;
00118                 }
00119                 return false;
00120         };
00122         void freeDiskSpace(u32 dskSpace) {
00123                 assert(actSize>=dskSpace);
00124                 actSize-=dskSpace;
00125                 // no need to update prxStats, this happens in ProxySession
00126         }
00127         virtual u32 getActSize() {
00128                 return actSize;
00129         };
00130         virtual u32 getRequests() {
00131                 return requests;
00132         };
00133         virtual u32 getHits() {
00134                 return hits;
00135         };
00136         virtual u64 getByteRequested() {
00137                 return byteRequested;
00138         };
00139         virtual u64 getByteHits() {
00140                 return byteHits;
00141         };
00142         virtual double getQualityHits() {
00143                 return qualityHits;
00144         }
00145 
00146         virtual void getContent() = 0;
00147 
00148         virtual void saveCacheIndexToDir(const char* dir) = 0;
00149 
00150         void saveStatisticTo(FILE* fp) {                
00151         dprintf_full("CacheManager::saveStatisticTo\n");
00152                 if(fp) {
00153                         fprintf(fp,"Size: %u\nRequests: %u\nHits: %u\nBytesReq(KB): %u\n BytesHit(KB); %u\n",
00154                                                         cacheSize, requests, hits, (u32)(byteRequested/1024), (u32)(byteHits/1024));
00155                 }
00156         }
00157 };
00158 
00159 #endif                          /* _CACHEMANAGER_HPP_ */