Polish OAuth2LoginConfigurer

Fixes gh-4747

samples/boot/oauth2login/src/main/java/sample/config/OAuth2LoginConfig.java

@@ -17,7 +17,9 @@ package sample.config;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 import org.springframework.security.oauth2.client.InMemoryOAuth2AuthorizedClientService;
 import org.springframework.security.oauth2.client.OAuth2AuthorizedClientService;
 import org.springframework.security.oauth2.client.registration.ClientRegistrationRepository;
@@ -25,12 +27,23 @@ import org.springframework.security.oauth2.client.registration.ClientRegistratio
 /**
  * @author Joe Grandja
  */
-@Configuration
-public class OAuth2LoginConfig {
+@EnableWebSecurity
+public class OAuth2LoginConfig extends WebSecurityConfigurerAdapter {
 
 	@Autowired
 	private ClientRegistrationRepository clientRegistrationRepository;
 
+	@Override
+	protected void configure(HttpSecurity http) throws Exception {
+		http
+			.authorizeRequests()
+				.anyRequest().authenticated()
+				.and()
+			.oauth2Login()
+				.clientRegistrationRepository(this.clientRegistrationRepository)
+				.authorizedClientService(this.authorizedClientService());
+	}
+
 	@Bean
 	public OAuth2AuthorizedClientService authorizedClientService() {
 		return new InMemoryOAuth2AuthorizedClientService(this.clientRegistrationRepository);