// Adds the revision to the cache
void LdbCache::put(const std::string &id, const Revision &rev)
{
if (!m_db) opendb();
MOStream rout;
rev.write(rout);
std::vector<char> data(rout.data());
leveldb::Status s = m_db->Put(leveldb::WriteOptions(), id, std::string(data.begin(), data.end()));
if (!s.ok()) {
throw PEX(str::printf("Error writing to cache: %s", s.ToString().c_str()));
}
}
// Adds the revision to the cache
void Cache::put(const std::string &id, const Revision &rev)
{
if (!m_loaded) {
load();
}
// Defer any signals while writing to the cache
SIGBLOCK_DEFER();
// Add revision to cache
std::string dir = m_opts.cacheDir() + "/" + uuid(), path;
if (m_cout == NULL) {
m_coindex = 0;
do {
path = str::printf("%s/cache.%u", dir.c_str(), m_coindex);
if (!sys::fs::fileExists(path) || sys::fs::filesize(path) < MAX_CACHEFILE_SIZE) {
break;
}
++m_coindex;
} while (true);
delete m_cout;
m_cout = new BOStream(path, true);
} else if (m_cout->tell() >= MAX_CACHEFILE_SIZE) {
delete m_cout;
path = str::printf("%s/cache.%u", dir.c_str(), ++m_coindex);
m_cout = new BOStream(path, true);
}
uint32_t offset = m_cout->tell();
MOStream rout;
rev.write03(rout);
std::vector<char> compressed = utils::compress(rout.data());
*m_cout << compressed;
// Add revision to index
if (m_iout == NULL) {
if (sys::fs::exists(dir + "/index")) {
m_iout = new GZOStream(dir + "/index", true);
} else {
m_iout = new GZOStream(dir + "/index", false);
// Version number
*m_iout << CACHE_VERSION;
}
}
*m_iout << id;
*m_iout << m_coindex << offset << utils::crc32(compressed);
// Update cached index
m_index[id] = std::pair<uint32_t, uint32_t>(m_coindex, offset);
}