spring security5.x OAuth2 使用REDIS管理分布式客户端授权信息

import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.data.redis.serializer.JdkSerializationRedisSerializer;
import org.springframework.data.redis.serializer.StringRedisSerializer;
import org.springframework.security.core.Authentication;
import org.springframework.security.oauth2.client.OAuth2AuthorizedClient;
import org.springframework.security.oauth2.client.OAuth2AuthorizedClientService;
import org.springframework.stereotype.Service;

@Service
public class RedisOAuth2AuthorizedClientServiceImpl implements OAuth2AuthorizedClientService {
    private final static String REDIS_KEY_PATTERN = "my-oauth2authorizedclient:%S:%S";
    private final RedisTemplate<String, OAuth2AuthorizedClient> redisTemplate;

    public RedisOAuth2AuthorizedClientServiceImpl(RedisConnectionFactory redisConnectionFactory) {
        this.redisTemplate = new RedisTemplate();
        this.redisTemplate.setConnectionFactory(redisConnectionFactory);
        this.redisTemplate.setKeySerializer(new StringRedisSerializer());
        this.redisTemplate.setValueSerializer(new JdkSerializationRedisSerializer());
        this.redisTemplate.afterPropertiesSet();
    }

    @Override
    public OAuth2AuthorizedClient loadAuthorizedClient(String clientRegistrationId, String principalName) {
        ValueOperations<String, OAuth2AuthorizedClient> valueOperations = redisTemplate.opsForValue();
        return (OAuth2AuthorizedClient) valueOperations.get(String.format(REDIS_KEY_PATTERN, clientRegistrationId, principalName));
    }

    @Override
    public void saveAuthorizedClient(OAuth2AuthorizedClient authorizedClient, Authentication principal) {
        ValueOperations<String, OAuth2AuthorizedClient> valueOperations = redisTemplate.opsForValue();
        valueOperations.set(
                String.format(REDIS_KEY_PATTERN, authorizedClient.getClientRegistration().getRegistrationId(), principal.getName()),
                authorizedClient
        );
    }

    @Override
    public void removeAuthorizedClient(String clientRegistrationId, String principalName) {
        redisTemplate.delete(String.format(REDIS_KEY_PATTERN, clientRegistrationId, principalName));
    }
}