@Override
    public void delete(String key) throws FailStoreException {
        try {
            if (key == null) {
                return;
            }
            db.delete(key.getBytes("UTF-8"));
        } catch (Exception e) {
            throw new FailStoreException(e);
        }
    }
Only a single process (possibly multi-threaded) can access a particular database at a time
Robert HG (254963746@qq.com) on 5/21/15.
lts-core/src/main/java/com/github/ltsopensource/core/failstore/leveldb/LeveldbFailStore.java