code: public static List<String> getKeyListFromBlobStore(BlobStore blobStore) throws Exception {
          Iterator<String> keys = blobStore.listKeys();
          List<String> keyList = new ArrayList<String>();
          if (keys != null) {
              while (keys.hasNext()) {
                  keyList.add(keys.next());
              }
          }
          LOG.debug("KeyList from blobstore {}", keyList);
          return keyList;
      }
docs: Get the list of keys from blobstore