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FileCacheManager.cpp
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FileCacheManager.cpp
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//
// Created by eden on 14/01/2020.
//
#include "FileCacheManager.h"
// constructor
FileCacheManager::FileCacheManager() {}
FileCacheManager::~FileCacheManager() {}
//getting new T object (creating file)
void FileCacheManager::insert(string key, string obj) {
try {
pthread_mutex_lock(&mutex);
// every T object has its own file
ofstream outputFile(key + ".txt", std::ios::out);
if (!outputFile) { throw ("can not open the output file"); }
else {
outputFile.write(obj.c_str(), obj.size()); // writing to the file
outputFile.close();
}
pthread_mutex_unlock(&mutex);
}
catch (int e) {
pthread_mutex_unlock(&mutex);
throw;
}
}
string FileCacheManager::get(string key) {
pthread_mutex_lock(&mutex);
try {
string objectString, line;
ifstream sourceFile(key + ".txt", std::ios::in);
if (sourceFile.is_open()) {
while (sourceFile.good()) {
getline(sourceFile, line);
objectString += line;
}
sourceFile.close();
}
pthread_mutex_unlock(&mutex);
return objectString;
}
catch (int e) {
pthread_mutex_unlock(&mutex);
throw;
}
}
bool FileCacheManager::existInCache (string key) {
pthread_mutex_lock(&mutex);
bool founded = true;
ifstream sourceFile(key + ".txt", std::ios::in);
// return if the key does not exist in cache
if(!sourceFile){
founded=false;
}
pthread_mutex_unlock(&mutex);
return founded;
}