SpringRedisSessionConfig.java

<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>

//these two dependencies will scan the properties for redis and creates connection auto

spring.session.store-type=redis
server.servlet.session.timeout=#in seconds
spring.redis.host=localhost
spring.redis.port=6379

@Configuration
@EnableRedisIndexedHttpSession
public class SpringSecurityConfig  {

//This is required in SecurityConfig file to register - context repository implementation is changed in springboot3
    @Bean
    public SecurityContextRepository securityContextRepository() {
        return new DelegatingSecurityContextRepository(
                new RequestAttributeSecurityContextRepository(),
                new HttpSessionSecurityContextRepository()
        );


    }

    @Bean
    public RedisConnectionFactory connectionFactory() {
        return new LettuceConnectionFactory();
    }// no need to set host and port - springboot3 by default recognises from the properties file - store type,host,port,timeout