SpringSecuritySigninService

SpringSecuritySigninService.groovy

class SpringSecuritySigninService extends GormUserDetailsService {

    void signIn(User user) {
        def authorities = loadAuthorities(user, user.username, true)
        def userDetails = createUserDetails(user, authorities)
        SecurityContextHolder.getContext().setAuthentication(
            new UsernamePasswordAuthenticationToken(userDetails, null, 
                  userDetails.authorities))
    }

}