怎么实现spring Security实现集群间共享session？？？

spring security中，怎么把共享的session存入到redis中去？

protected void configure(HttpSecurity http) throws Exception {
http
.sessionManagement()
.maximumSessions(32)
.sessionRegistry(sessionRegistry);

这里面会话注册表sessionRegistry是怎样与redis关联的呢？请指教，多谢了

https://github.com/spring-projects/spring-session

https://drissamri.be/blog/2015/05/21/spring-security-and-spring-session/

http://stackoverflow.com/questions/28447414/how-to-get-same-session-with-spring-security-and-spring-session-from-multiple-se