Spring Security OAuth2 with custom TokenGranter in version 2.0.+

Question

In previous versions of OAuth2 it was possible to add a custom token granter by adding it to the xml configuration in the element.<

Answer 1

Here is another way. Copied from here.

In this example, a new custom TokenGranter, named CustomTokenGranter, is added to a CompositeTokenGranter with the default TokenGranters. I like this example because it uses the AuthorizationServerEndpointsConfigurer's public method getTokenGranter() to retrieve the default TokenGranter's.

@Configuration
@EnableAuthorizationServer
protected static class OAuth2Config extends AuthorizationServerConfigurerAdapter {

    @Autowired
    private AuthenticationManager authenticationManager;

    @Override
    public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
        endpoints.authenticationManager(authenticationManager);
        endpoints.tokenGranter(tokenGranter(endpoints));
    }

    private TokenGranter tokenGranter(final AuthorizationServerEndpointsConfigurer endpoints) {
        List granters = new ArrayList(Arrays.asList(endpoints.getTokenGranter()));
        granters.add(new CustomTokenGranter(endpoints.getTokenServices(), endpoints.getClientDetailsService(), endpoints.getOAuth2RequestFactory(), "custom"));
        return new CompositeTokenGranter(granters);
    }