Intiliaze a component with properties inside an object in Kotlin

Issue

I have a data class for storing properties

@Component
@ConfigurationProperties(prefix = "cache")
data class CacheProperties(
    var enable: Boolean = false,
    var CacheName: String = "",
)

And I have an object where I need to use these properties. The Kotlin object doesn't support the @Autowired annotation. How can I initialize the properties in this case?

object MdsCacheValidationUtil {

    //need to inject cache properties here

    private val log: Logger = LoggerFactory.getLogger(this::class.java)

    fun validateLastUpdateTime(lastUpdateTime: Instant?) {
        println(cache.CacheName)
        //.....
    }
}

Solution

You should turn MdsCacheValidationUtil into a Spring Managed Bean using @Component annotation as follows:

@Component
class MdsCacheValidationUtil(cacheProperties: CacheProperties) {

    private val log: Logger = LoggerFactory.getLogger(this::class.java)

    fun validateLastUpdateTime(lastUpdateTime: Instant?) {
        println(cacheProperties.CacheName)
        //.....
    }
}

Additionally, I believe you have a typo in CacheProperties. I guess you wanted to write cacheName instead of CacheName. Mind the lowercase "c".

Answered By - João Dias