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package org.onap.vid.aai.util
import com.fasterxml.jackson.core.type.TypeReference
import com.fasterxml.jackson.databind.ObjectMapper
import com.fasterxml.jackson.module.kotlin.KotlinModule
import com.google.common.collect.ImmutableMap
import org.springframework.stereotype.Component
//I use a regular kotlin class because I want that when jackson read
//a json with null values (or missing fields) they would get default values.
//for other cases it's better to use data class for POJO class
//for more information you can read here :
//https://github.com/FasterXML/jackson-module-kotlin/issues/130
class CacheConfig constructor(
isActive: Boolean?,
expireAfterWriteHours: Long?,
refreshAfterWriteSeconds: Long?) {
val isActive: Boolean = isActive ?: true
val expireAfterWriteHours: Long = expireAfterWriteHours ?: 24L
val refreshAfterWriteSeconds: Long = refreshAfterWriteSeconds ?: 10L
companion object {
val defaultCacheConfig = CacheConfig(null, null, null)
}
}
interface CacheConfigProvider {
fun getCacheConfig(cacheName:String): CacheConfig
}
@Component
class CacheConfigProviderImpl() : CacheConfigProvider {
private val mapper = ObjectMapper().apply { registerModule(KotlinModule()) }
private fun readMapOfCacheConfig(): Map<String, CacheConfig> {
val configInputStream = CacheConfigProviderImpl::class.java.classLoader.getResourceAsStream("cacheConfig.json")
return if (configInputStream == null) {
ImmutableMap.of()
} else {
mapper.readValue(configInputStream, object : TypeReference<Map<String, CacheConfig>>() {})
}
}
override fun getCacheConfig(cacheName: String): CacheConfig {
return readMapOfCacheConfig()[cacheName] ?: CacheConfig.defaultCacheConfig
}
}
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