new formatter

src/main/kotlin/Main.kt

@@ -7,7 +7,7 @@ fun main() = runBlocking{
     GlobalScope.launch {
         val mqtt = MqttSubscriber()
         mqtt.connect()
-        val waitTime = System.getenv("WAITTIME").toLong() ?: 10000L
+        val waitTime = System.getenv("WAITTIME").toLong()
         delay(waitTime)
         val resultMap = mqtt.disconnect()
         val resultProcessor = ProcessResults()

src/main/kotlin/ProcessResults.kt

@@ -1,14 +1,18 @@
 import java.text.SimpleDateFormat
 import java.time.Instant
+import java.time.ZoneId
+import java.time.format.DateTimeFormatter
 
 
-class ProcessResults{
+class ProcessResults {
     var mapToProcess = LinkedHashMap<Int, Instant>()
-    private var formatter = SimpleDateFormat("yyyy-MM-dd_HH-mm-ss_SSS")
+    private var formatter = DateTimeFormatter.ofPattern("yyyy-MM-dd_HH-mm-ss_SSS")
+        .withZone(ZoneId.systemDefault())
 
 
-    fun process(){
-        for((id, instant) in this.mapToProcess){
+    fun process() {
+        println("Start processing results")
+        for ((id, instant) in this.mapToProcess) {
             val currInstantString = formatter.format(instant)
             println("$id, $currInstantString")
         }