public byte[] getPrivateKeySalt() {
final JpaOperation<byte[]> saveChannel = new JpaOperation<byte[]>() {
@Override
public byte[] perform(final EntityManager em) {
final Query query = em.createQuery("SELECT s FROM Server s");
final Server server = (Server) query.getSingleResult();
return server.getSalt().getBytes(UTF_8);
}
};
try {
return jpaExecutor.execute(saveChannel);
} catch (final Exception e) {