void CleanCache(agi::fs::path const& directory, std::string const& file_type, uint64_t max_size, uint64_t max_files) {
static std::unique_ptr<agi::dispatch::Queue> queue;
if (!queue)
queue = agi::dispatch::Create();
max_size <<= 20;
if (max_files == 0)
max_files = std::numeric_limits<uint64_t>::max();
queue->Async([=]{
LOG_D("utils/clean_cache") << "cleaning " << directory/file_type;
uint64_t total_size = 0;
std::multimap<int64_t, agi::fs::path> cachefiles;
for (auto const& file : agi::fs::DirectoryIterator(directory, file_type)) {
agi::fs::path path = directory/file;
cachefiles.insert(std::make_pair(agi::fs::ModifiedTime(path), path));
total_size += agi::fs::Size(path);
}
if (cachefiles.size() <= max_files && total_size <= max_size) {
LOG_D("utils/clean_cache") << boost::format("cache does not need cleaning (maxsize=%d, cursize=%d, maxfiles=%d, numfiles=%d), exiting")
% max_size % total_size % max_files % cachefiles.size();
return;
}
int deleted = 0;
for (auto const& i : cachefiles) {
// stop cleaning?
if ((total_size <= max_size && cachefiles.size() - deleted <= max_files) || cachefiles.size() - deleted < 2)
break;
uint64_t size = agi::fs::Size(i.second);
try {
agi::fs::Remove(i.second);
LOG_D("utils/clean_cache") << "deleted " << i.second;
}
catch (agi::Exception const& e) {
LOG_D("utils/clean_cache") << "failed to delete file " << i.second << ": " << e.GetChainedMessage();
continue;
}
total_size -= size;
++deleted;
}
LOG_D("utils/clean_cache") << "deleted " << deleted << " files, exiting";
});
}
