使用Spring-Social执行SignIn和SignUp方法的顺序

Question

在我目前的spring项目中，我最近添加了对使用Spring-Social的社交登录的支持。主要的配置类如下：

@Configuration
@EnableSocial
@ComponentScan(value="com.webapp.loja")
public class SocialContext implements SocialConfigurer {

    @Autowired
    private DataSource dataSource;

    @Autowired
    private SignInAdapter signInAdapter;

    @Autowired
    private ConnectionSignUp connectionSignUp;

    @Override
    public void addConnectionFactories(ConnectionFactoryConfigurer cfConfig, Environment env) {
        cfConfig.addConnectionFactory(new TwitterConnectionFactory("...", "..."));
        cfConfig.addConnectionFactory(new FacebookConnectionFactory("...", "..."));
    }

    @Override
    public UserIdSource getUserIdSource() {
        return new AuthenticationNameUserIdSource();
    }

    @Override
    public UsersConnectionRepository getUsersConnectionRepository(ConnectionFactoryLocator connectionFactoryLocator) {
        JdbcUsersConnectionRepository repository = new JdbcUsersConnectionRepository(dataSource, connectionFactoryLocator, Encryptors.noOpText()); 
        repository.setConnectionSignUp(connectionSignUp);
        return repository;
    }

    @Bean
    public ConnectController connectController(ConnectionFactoryLocator connectionFactoryLocator, ConnectionRepository connectionRepository) {
        return new ConnectController(connectionFactoryLocator, connectionRepository);
    }

    @Bean
    public ProviderSignInController providerSignInController(ConnectionFactoryLocator connectionFactoryLocator, UsersConnectionRepository connectionRepository) {
        return new ProviderSignInController(connectionFactoryLocator, connectionRepository, signInAdapter);
    }

}

我的问题是，当我尝试使用任何社交媒体服务登录应用程序时，应用程序会先执行connectionSignUp类，然后执行signInAdapter。

我想要相反的行为:首先，应用程序应该执行signInAdapter，其中我尝试查找用户是否已经存在：

@Service
public class SimpleSignInAdapter implements SignInAdapter {

    @Autowired
    private SocialUserDetailsService socialUserDetailsService;

    @Override
    public String signIn(String userId, Connection<?> connection, NativeWebRequest request) {
        SocialUserDetails user = socialUserDetailsService.loadUserByUserId(userId);
        if(user != null) {
            SecurityContextHolder.getContext().setAuthentication(new UsernamePasswordAuthenticationToken(user.getUsername(), user.getPassword(), user.getAuthorities()));
            return user.getUsername();
        } else {
            return null;
        }
    }

}

仅当未找到用户(返回null)时，应用程序才应执行connectionSignUp类来创建新帐户：

@Component
public class AccountConnectionSignUp implements ConnectionSignUp {

    @Autowired
    private UsuarioHome accountRepository;

    @Override
    public String execute(Connection<?> connection) {
        UserProfile profile = connection.fetchUserProfile();
        Usuario account = new Usuario(profile.getUsername(), profile.getFirstName(), profile.getLastName(), profile.getEmail());
        accountRepository.persist(account);
        return profile.getUsername();
    }

}

有没有人知道这是否可能？

Answer 1

嗯，我觉得点菜没问题吧？在connectionSignUp中，您可以检查用户是否已经持久化。如果是，则继续并让用户登录。如果没有，请注册该用户。然后帮他签到？