1 files changed, 52 insertions, 0 deletions
diff --git a/vid-app-common/src/main/java/org/onap/vid/aai/util/CacheConfig.kt b/vid-app-common/src/main/java/org/onap/vid/aai/util/CacheConfig.kt
new file mode 100644
index 000000000..0ff604144
--- /dev/null
+++ b/vid-app-common/src/main/java/org/onap/vid/aai/util/CacheConfig.kt
@@ -0,0 +1,52 @@
+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
+    }
+}
+
+