Java Spring Security config - multiple authentication providers

There are several references of multiple authentication providers in spring security, but no example in Java config could be located.

The following link gives the XML notation: Multiple Authentication Providers in Spring Security

We need to authenticate using LDAP or DB

Below is our sample code:

@Configuration
@EnableWebSecurity
public class XSecurityConfig extends WebSecurityConfigurerAdapter {

    @Autowired
    private AuthenticationProvider authenticationProvider;

    @Autowired
    private AuthenticationProvider authenticationProviderDB;


    @Override
    @Order(1)

    protected void configure(AuthenticationManagerBuilder auth) throws Exception {
        auth.authenticationProvider(authenticationProvider);
    }


    @Order(2)
    protected void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
        auth.authenticationProvider(authenticationProviderDB);
    }

    @Override
      public void configure(WebSecurity web) throws Exception {
        web
          .ignoring()
             .antMatchers("/scripts/**","/styles/**","/images/**","/error/**");
      }
    ______

    @Override
    @Order(1)
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().disable()
        .authorizeRequests()
            .antMatchers("/","/logout","/time").permitAll()
                    .antMatchers("/admin").hasRole("ADMIN")         
                        .anyRequest().authenticated()
            .and()
        .formLogin()
            .loginPage("/index")
            .loginProcessingUrl("/perform_login")
            .usernameParameter("email")
            .passwordParameter("password")
            .failureUrl("/index?failed=true")
            .defaultSuccessUrl("/summary",true)
            .permitAll()
            .and()
         .logout().logoutUrl("/logout")
                  .logoutSuccessUrl("/index?logout=true").permitAll()
            .and()
            .exceptionHandling().accessDeniedPage("/error403")
        .and().authenticationProvider(authenticationProvider);

    }

    @Order(1)
    protected void configureDB(HttpSecurity http) throws Exception {
        http.csrf().disable()
        .authorizeRequests()
            .antMatchers("/","/logout").permitAll()
            .anyRequest().authenticated()
            .and()
        .formLogin()
            .loginPage("/index")
            .loginProcessingUrl("/perform_login")
            .usernameParameter("email")
            .passwordParameter("password")
            .failureUrl("/index?failed=true")
            .defaultSuccessUrl("/summary",true)
            .permitAll()
            .authenticationProvider(authenticationProviderDB)
    //This line giving compilation error stating authenticationProvider is not available in formloginconfigurer

         .and()
         .logout().logoutUrl("/logout")
                  .logoutSuccessUrl("/index?logout=true").permitAll()
            .and()
            .exceptionHandling().accessDeniedPage("/error403");
    }

}

May be this will help you :-

@Configuration
@EnableWebSecurity
@Profile("container")
public class XSecurityConfig extends WebSecurityConfigurerAdapter {

@Autowired
private AuthenticationProvider authenticationProvider;

@Autowired
private AuthenticationProvider authenticationProviderDB;

@Override
@Order(1)

protected void configure(AuthenticationManagerBuilder auth) throws Exception {
    auth.authenticationProvider(authenticationProvider);
}

@Order(2)
protected void configureGlobal(AuthenticationManagerBuilder auth) throws Exception {
    auth.authenticationProvider(authenticationProviderDB);
}

@Override
  public void configure(WebSecurity web) throws Exception {
    web
      .ignoring()
         .antMatchers("/scripts/**","/styles/**","/images/**","/error/**");
  }

@Override
public void configure(HttpSecurity http) throws Exception {
    http
            .authorizeRequests()
            .antMatchers("/rest/**").authenticated()
            .antMatchers("/**").permitAll()
            .anyRequest().authenticated()
            .and()
            .formLogin()
            .successHandler(new AuthenticationSuccessHandler() {
                @Override
                public void onAuthenticationSuccess(
                        HttpServletRequest request,
                        HttpServletResponse response,
                        Authentication a) throws IOException, ServletException {
                            //To change body of generated methods,
                            response.setStatus(HttpServletResponse.SC_OK);
                        }
            })
            .failureHandler(new AuthenticationFailureHandler() {

                @Override
                public void onAuthenticationFailure(
                        HttpServletRequest request,
                        HttpServletResponse response,
                        AuthenticationException ae) throws IOException, ServletException {
                            response.setStatus(HttpServletResponse.SC_UNAUTHORIZED);
                        }
            })
            .loginProcessingUrl("/access/login")
            .and()
            .logout()
            .logoutUrl("/access/logout")                
            .logoutSuccessHandler(new LogoutSuccessHandler() {
                @Override
                public void onLogoutSuccess(
                        HttpServletRequest request, 
                        HttpServletResponse response, 
                        Authentication a) throws IOException, ServletException {
                    response.setStatus(HttpServletResponse.SC_NO_CONTENT);
                }
            })
            .invalidateHttpSession(true)
            .and()
            .exceptionHandling()
            .authenticationEntryPoint(new Http403ForbiddenEntryPoint())
            .and()
            .csrf()//Disabled CSRF protection
            .disable();
    }
}