UnauthorizedEntryPoint.java

package net.pechorina.kontempl.service;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.security.core.AuthenticationException;
import org.springframework.security.web.AuthenticationEntryPoint;
import org.springframework.stereotype.Component;

@Component("unauthorizedEntryPoint")
public class UnauthorizedEntryPoint implements AuthenticationEntryPoint {
	@Override
	public void commence(HttpServletRequest request,
			HttpServletResponse response, AuthenticationException authException)
			throws IOException, ServletException {
		response.sendError(HttpServletResponse.SC_UNAUTHORIZED,
				"Unauthorized: Authentication token was either missing or invalid.");
	}
}