How to use org.keycloak.adapters.undertow

@Override
public boolean restoreRequest() {
  HttpSession session = getSession(false);
  if (session == null) return false;
  SavedRequest.tryRestoreRequest(exchange, session);
  return false;
}

protected RequestAuthenticator createRequestAuthenticator(KeycloakDeployment deployment, HttpServerExchange exchange, SecurityContext securityContext, UndertowHttpFacade facade) {
  int confidentialPort = getConfidentilPort(exchange);
  AdapterTokenStore tokenStore = getTokenStore(exchange, facade, deployment, securityContext);
  return new ServletRequestAuthenticator(facade, deployment,
      confidentialPort, securityContext, exchange, tokenStore);
}

  @Override
  public HttpHandler wrap(HttpHandler handler) {
    return new UndertowAuthenticatedActionsHandler(deploymentContext, handler);
  }
}

protected AdapterTokenStore getTokenStore(HttpServerExchange exchange, HttpFacade facade, KeycloakDeployment deployment, SecurityContext securityContext) {
  if (deployment.getTokenStore() == TokenStore.SESSION) {
    return new UndertowSessionTokenStore(exchange, deployment, userSessionManagement, securityContext);
  } else {
    return new UndertowCookieTokenStore(facade, deployment, securityContext);
  }
}

@Override
protected AdapterTokenStore getTokenStore(HttpServerExchange exchange, HttpFacade facade, KeycloakDeployment deployment, SecurityContext securityContext) {
  if (deployment.getTokenStore() == TokenStore.SESSION) {
    return new ServletSessionTokenStore(exchange, deployment, sessionManagement, securityContext);
  } else {
    return new UndertowCookieTokenStore(facade, deployment, securityContext);
  }
}

@Override
protected String changeHttpSessionId(boolean create) {
  if (!deployment.isTurnOffChangeSessionIdOnLogin()) return ChangeSessionId.changeSessionId(exchange, create);
  else return getHttpSessionId(create);
}

  @Override
  protected KeycloakUndertowAccount createAccount(KeycloakPrincipal<RefreshableKeycloakSecurityContext> principal) {
    return new KeycloakUndertowAccount(principal);
  }
}

  @Override
  public UndertowHttpFacade createFacade(HttpServerExchange exchange) {
    return new OIDCServletUndertowHttpFacade(exchange);
  }
}

@Override
public InputStream getInputStream() {
  return getInputStream(false);
}

protected Integer servePage(final HttpServerExchange exchange, final String location) {
  sendRedirect(exchange, location);
  return StatusCodes.TEMPORARY_REDIRECT;
}

  @Override
  public Request getRequest() {
    return new RequestFacade();
  }
}

@Override
public void saveRequest() {
  SavedRequest.trySaveRequest(exchange);
}

protected RequestAuthenticator createRequestAuthenticator(KeycloakDeployment deployment, HttpServerExchange exchange, SecurityContext securityContext, UndertowHttpFacade facade) {
  int confidentialPort = getConfidentilPort(exchange);
  AdapterTokenStore tokenStore = getTokenStore(exchange, facade, deployment, securityContext);
  return new ServletRequestAuthenticator(facade, deployment,
      confidentialPort, securityContext, exchange, tokenStore);
}

protected AdapterTokenStore getTokenStore(HttpServerExchange exchange, HttpFacade facade, KeycloakDeployment deployment, SecurityContext securityContext) {
  if (deployment.getTokenStore() == TokenStore.SESSION) {
    return new UndertowSessionTokenStore(exchange, deployment, sessionManagement, securityContext);
  } else {
    return new UndertowCookieTokenStore(facade, deployment, securityContext);
  }
}

@Override
protected String changeHttpSessionId(boolean create) {
  if (!deployment.isTurnOffChangeSessionIdOnLogin()) return ChangeSessionId.changeSessionId(exchange, create);
  else return getHttpSessionId(create);
}

  @Override
  protected KeycloakUndertowAccount createAccount(KeycloakPrincipal<RefreshableKeycloakSecurityContext> principal) {
    return new KeycloakUndertowAccount(principal);
  }
}

@Override
public boolean restoreRequest() {
  HttpSession session = getSession(false);
  if (session == null) return false;
  SavedRequest.tryRestoreRequest(exchange, session);
  return false;
}

  @Override
  public UndertowHttpFacade createFacade(HttpServerExchange exchange) {
    return new OIDCServletUndertowHttpFacade(exchange);
  }
}

@Override
public InputStream getInputStream() {
  return getInputStream(false);
}

@Override
protected KeycloakUndertowAccount createAccount(KeycloakPrincipal<RefreshableKeycloakSecurityContext> principal) {
  return new KeycloakUndertowAccount(principal);
}