AuthenticationSuccessHandler in spring mvc java based configuration

I have three roles, and i want to redirect user to different pages after login according to their roles. I know this can be done by AuthenticationSuccessHandler, but i am having trouble in declaring it in java based configuration. So far i have done this.

protected void configure(HttpSecurity http) throws Exception {

     http
     .authorizeRequests()                                                                
    .antMatchers("/resources/**", "/login").permitAll()                  
    .antMatchers("/admin/**").hasRole("USER")                           
    .and()

    .formLogin()
        .loginPage("/login")
        .defaultSuccessUrl("/")
        .successHandler(successHandler) //----- to handle user role
        .failureUrl("/loginfailed")             
        .permitAll()
        .and()

    .logout()
        .logoutRequestMatcher(new AntPathRequestMatcher("/logout"))
        .deleteCookies("JSESSIONID")
        .invalidateHttpSession( true )
        .and();                    
}

My question is where to declare successHandler and how to autowire it in this class, or how to declare successHandler method in this class and use it.