Accessing Vaadin JaasAccessControl from Rest-Service

I am working on a J2EE application which is incorporating


for authentication in a vaadin application. For testing purposes I would like to reuse the JaasAccessControl.login() method already implemented by the team. Thus I call the login mechanism by simply:

	private LoginViewController loginController;
	@Produces( MediaType.TEXT_PLAIN )
	public String login() {
		JaasAccessControl.login("user", HashcodeGenerator.generateHashCode("password"));

However, my request fails due to NPE in JaasAccessControl line 73, probably because getCurrentRequest() is null. My REST method of course is not a Vaadin page. Are there any ways I can use this from a Rest implementation?