3dpcp/.svn/pristine/62/62275c8f5e1a5a21dcde2af49b4afc850c268d5e.svn-base
2012-09-16 14:33:11 +02:00

84 lines
2 KiB
Text

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