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53 lines
1.4 KiB
C++
53 lines
1.4 KiB
C++
/**
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* @file
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* @brief
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*
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* @author Thomas Escher
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*/
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#ifndef TEMPORARY_HANDLER_H
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#define TEMPORARY_HANDLER_H
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#include "scanserver/cache/cacheHandler.h"
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#include "scanserver/sharedScan.h"
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#include "scanserver/cacheIO.h"
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/**
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* @brief CacheHandler for artificially created CacheObjects by reduction in SharedScan.
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*
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* This handler saves and loads the contents of a CacheObject with arbitrary contents via CacheIO.
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*/
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class TemporaryHandler : public CacheHandler
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{
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public:
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/**
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* Constructor
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* @param static_data determines overwriting policy. Set false for changing data, true for static write-only-once data.
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*/
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TemporaryHandler(CacheObject* obj, CacheManager* cm, SharedScan* scan, bool static_data = false);
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/**
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* Deserialize data from a file if it exists and written flag is set, otherwise does nothing
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* @return whether written flag was set and file was found and loaded
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*/
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virtual bool load();
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/**
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* Serialize all data into a file
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* It will do so if either the written flag isn't set, or static data flag isn't set regardless of the written flag.
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*/
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virtual void save(unsigned char* data, unsigned int size);
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//! Reset flag for having a cached file, causing reads to fail and saves to overwrite older files.
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virtual void invalidate() { m_written = false; }
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protected:
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SharedScan* m_scan;
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private:
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CacheIO::IDType m_id;
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bool m_written, m_static_data;
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};
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#endif //TEMPORARY_HANDLER_H
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