RedisRepositoriesConfig.java

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Profile;
import org.springframework.data.redis.core.RedisKeyValueAdapter;
import org.springframework.data.redis.repository.configuration.EnableRedisRepositories;
import org.springframework.session.data.redis.config.ConfigureRedisAction;

// https://dzone.com/articles/build-a-chat-application-using-spring-boot-websock
// https://engineering.salesforce.com/lessons-learned-using-spring-data-redis-f3121f89bff9
// https://help.heroku.com/5BP0E8RC/how-to-enable-notify-keyspace-events-on-redis
// https://github.com/spring-projects/spring-session/issues/113

// redis-cli config set notify-keyspace-events xEg
// heroku redis:keyspace-notifications REDIS_URL -c 'xEg'

@Configuration
@EnableRedisRepositories(
    basePackageClasses = {/* ... */},
    enableKeyspaceEvents = RedisKeyValueAdapter.EnableKeyspaceEvents.ON_STARTUP,
    keyspaceNotificationsConfigParameter = "" // [sic]
)
class RedisRepositoriesConfig {
    @SuppressWarnings("SameReturnValue")
    @Bean
    @Profile("prod")
    public ConfigureRedisAction configureRedisAction() {
        return ConfigureRedisAction.NO_OP;
    }
}