JSON Schema builder with LoadingCache

buildSchema.scala

val schemaCache: LoadingCache[String, Schema] = CacheBuilder
  .newBuilder
  .maximumSize(MaximumCacheSize)
  .expireAfterAccess(CacheMinutes, TimeUnit.MINUTES)
  .build(new CacheLoader[String, Schema]() {
    override def load(schemaRef: String): Schema = {
      logger.info(s"Loading schema $schemaRef")
      loadSchema(schemaRef: String)
    }
  })
 
def buildSchema(schema: JSONObject): Schema = {
  SchemaLoader.builder()
    .schemaJson(schema)
    .schemaClient(new ResourceSchemaClient)
    .draftV7Support()
    .useDefaults(true)
    .build()
    .load()
    .build()
}
 
def loadSchema(schemaRef: String): Schema = {
  val schemaObject = Try(readJsonObject(schemaRef)) match {
    case Success(reader) => reader
    case Failure(_: NullPointerException) => throw SchemaNotFoundException(schemaRef)
    case Failure(exception) => throw exception
  }
  buildSchema(schemaObject)
}