85 lines
2 KiB
Text
85 lines
2 KiB
Text
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/*
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* temporaryHandler implementation
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*
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* Copyright (C) Thomas Escher, Kai Lingemann
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*
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* Released under the GPL version 3.
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*
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*/
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#include "scanserver/temporaryHandler.h"
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#include <sstream>
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#include <stdexcept>
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using namespace std;
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#include "scanserver/cache/cacheManager.h"
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TemporaryHandler::TemporaryHandler(CacheObject* obj, CacheManager* cm, SharedScan* scan, bool static_data) :
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CacheHandler(obj, cm),
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m_scan(scan),
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m_written(false), m_static_data(static_data)
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{
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m_id = CacheIO::getId();
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}
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bool TemporaryHandler::load()
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{
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// INFO
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//cout << "[" << m_scan->getIdentifier() << "][" << m_id << "] TemporaryHandler::load";
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// if the file was not written (equals invalidated) or file doesn't exist we can't load anything
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unsigned int size = 0;
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if(!m_written || (size = CacheIO::check(m_id)) == 0) {
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// INFO
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//cout << ", no file found" << endl;
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return false;
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}
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// INFO
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//cout << endl;
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// get space
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unsigned char* data_ptr;
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try {
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data_ptr = m_manager->allocateCacheObject(m_object, size);
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} catch(runtime_error& e) {
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// INFO
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// cerr << "[" << m_scan->getIdentifier() << "][" << m_id << "] CacheManager error: " << e.what() << endl;
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// rethrow
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throw e;
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}
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// write data into the CO
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CacheIO::read(m_id, reinterpret_cast<char*>(data_ptr));
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// TODO: check errors
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// INFO
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//cout << "[" << m_scan->getIdentifier() << "][" << m_id << "] TemporaryHandler::load successful" << endl;
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return true;
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}
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void TemporaryHandler::save(unsigned char* data, unsigned int size)
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{
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// INFO
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//cout << "[" << m_scan->getIdentifier() << "][" << m_id << "] TemporaryHandler::save";
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// save if the cached file doesn't exist yet or data is dynamic and file content has to be updated
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if(!m_written || !m_static_data) {
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// write to file and flag for cached reads from here on
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CacheIO::write(m_id, reinterpret_cast<char*>(data), size);
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m_written = true;
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} else {
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// INFO
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//cout << ", file already cached";
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}
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// INFO
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//cout << endl;
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return;
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}
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