@Override
public GetDataEncryptionKeyResponseProto getDataEncryptionKey(
RpcController controller, GetDataEncryptionKeyRequestProto request)
throws ServiceException {
try {
DataEncryptionKey encryptionKey = server.getDataEncryptionKey();
return GetDataEncryptionKeyResponseProto.newBuilder()
.setDataEncryptionKey(PBHelper.convert(encryptionKey))
.build();
} catch (IOException e) {
throw new ServiceException(e);