spring boot与外部tomcat容器的Redis会话的最佳用法是什么

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.session</groupId>
    <artifactId>spring-session-data-redis</artifactId>
</dependency>

spring.redis.host=redis.example.com
spring.redis.port=6379
spring.redis.password=yourpassword

@Configuration
@EnableRedisHttpSession
public class SessionConfig {
    @Bean
    public LettuceConnectionFactory connectionFactory() {
        RedisStandaloneConfiguration config = new RedisStandaloneConfiguration();
        config.setHostName("redis.example.com");
        config.setPort(6379);
        config.setPassword("yourpassword");
        return new LettuceConnectionFactory(config);
    }
}

<Context>
    <Valve className="org.apache.catalina.valves.RemoteIpValve" />
    <Manager className="org.springframework.session.web.http.SessionRepositoryFilter$SessionRepositoryRequestWrapperValve" />
</Context>

@RestController
public class ExampleController {
    @Autowired
    private HttpSession session;

    @GetMapping("/example")
    public String example() {
        session.setAttribute("key", "value");
        String value = (String) session.getAttribute("key");
        return value;
    }
}