KeyValueEngine* LMDBEngineFactory::CreateDB(const std::string& name)
{
if (!m_env_opened)
{
make_dir(m_cfg.path);
int env_opt = MDB_NOSYNC | MDB_NOMETASYNC | MDB_NOMETASYNC;
int rc = mdb_env_open(m_env, m_cfg.path.c_str(), env_opt, 0664);
if (rc != 0)
{
ERROR_LOG("Failed to open mdb:%s\n", mdb_strerror(rc));
return NULL;
}
m_env_opened = true;
}
LMDBEngine* engine = new LMDBEngine();
LMDBConfig cfg = m_cfg;
if (engine->Init(cfg, m_env, name) != 0)
{
DELETE(engine);
return NULL;
}
DEBUG_LOG(
"Create DB:%s at path:%s success", name.c_str(), cfg.path.c_str());
return engine;
}
void LMDBEngineFactory::DestroyDB(KeyValueEngine* engine)
{
LMDBEngine* kcdb = (LMDBEngine*) engine;
if (NULL != kcdb)
{
kcdb->Clear();
}
DELETE(engine);
}
KeyValueEngine* LMDBEngineFactory::CreateDB(const std::string& name)
{
if (!m_env_opened)
{
mdb_env_create(&m_env);
int page_size = sysconf(_SC_PAGE_SIZE);
int rc = mdb_env_set_mapsize(m_env, (m_cfg.max_db_size / page_size) * page_size);
if (rc != MDB_SUCCESS)
{
ERROR_LOG("Invalid db size:%llu for reason:%s", m_cfg.max_db_size, mdb_strerror(rc));
return NULL;
}
char tmp[m_cfg.path.size() + name.size() + 10];
sprintf(tmp, "%s/%s", m_cfg.path.c_str(), name.c_str());
m_cfg.path = tmp;
make_dir(m_cfg.path);
int env_opt = MDB_NOSYNC | MDB_NOMETASYNC | MDB_WRITEMAP | MDB_MAPASYNC ;
if(!m_cfg.readahead)
{
env_opt |= MDB_NORDAHEAD;
}
rc = mdb_env_open(m_env, m_cfg.path.c_str(), env_opt, 0664);
if (rc != MDB_SUCCESS)
{
ERROR_LOG("Failed to open mdb:%s", mdb_strerror(rc));
return NULL;
}
m_env_opened = true;
}
LMDBEngine* engine = new LMDBEngine();
LMDBConfig cfg = m_cfg;
if (engine->Init(cfg, m_env, name) != 0)
{
DELETE(engine);
return NULL;
}
DEBUG_LOG("Create DB:%s at path:%s success", name.c_str(), cfg.path.c_str());
return engine;
}
