code sample for OAuth2SecurityConfiguration

OAuth2SecurityConfiguration.java

@Configuration
public class OAuth2SecurityConfiguration {

	// This first section of the configuration just makes sure that Spring Security picks
	// up the UserDetailsService that we create below. 
	@Configuration
	@EnableWebSecurity
	protected static class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {
		
		@Autowired
		private UserDetailsService userDetailsService;