*/
public JobService authenticate(final String username, final String password, UUID protocolVersionId)
throws RemoteException, LoginException, ProtocolVersionException {
if (!protocolVersionId.equals(JdcpUtil.PROTOCOL_VERSION_ID)) {
throw new ProtocolVersionException();
}
CallbackHandler handler = FixedCallbackHandler.forNameAndPassword(username, password);
LoginContext context = new LoginContext(LOGIN_CONFIGURATION_NAME, handler);
context.login();