added possiblity to build jar file and override shutdown behavior when closing via alt-f4 or the close button of the window

Projekte/mdga/client/build.gradle

@@ -26,3 +26,14 @@ implementation project(":mdga:model")
     mainClass = 'pp.mdga.client.MdgaApp'
     applicationName = 'MDGA'
 }
+
+tasks.register('fatJar', Jar) {
+    duplicatesStrategy = DuplicatesStrategy.EXCLUDE
+    manifest {
+        attributes 'Main-Class': 'pp.mdga.client.MdgaApp'
+    }
+    from {
+        configurations.runtimeClasspath.collect { it.isDirectory() ? it : zipTree(it) }
+    }
+    with jar
+}

Projekte/mdga/client/src/main/java/pp/mdga/client/MdgaApp.java

@@ -88,7 +88,7 @@ public class MdgaApp extends SimpleApplication {
     private final TimerManager timerManager = new TimerManager();
 
 
-    public static final int DEBUG_MULTIPLIER = 0;
+    public static final int DEBUG_MULTIPLIER = 1;
 
     /**
      * Constructs a new MdgaApp instance.
@@ -403,5 +403,14 @@ public TimerManager getTimerManager() {
     public CeremonyView getCeremonyView() {
         return ceremonyView;
     }
+
+    @Override
+    public void destroy() {
+        afterGameCleanup();
+        if (executor != null) {
+            executor.shutdown();
+        }
+        super.destroy();
+    }
 }