RealmAction.kt

fun realmTransactionSync(transaction: (Realm) -> Unit) {
  val realm = Realm.getDefaultInstance()
  var canceled = false
  realm.beginTransaction()

  try {
    transaction(realm)
  } catch (e: Exception) {
    e.printStackTrace()
    realm.cancelTransaction()
    canceled = true
  }

  if (!canceled) {
    realm.commitTransaction()
  }

  realm.close()
}