Erweiterungen

src/main/java/util/PreferencesKeyValueStore.java

@@ -0,0 +1,20 @@
+package util;
+
+import org.springframework.stereotype.Service;
+
+import java.util.Optional;
+import java.util.prefs.Preferences;
+
+@Service
+public class PreferencesKeyValueStore {
+
+    private final Preferences prefs = Preferences.userRoot().node("emulatorstation");
+
+    public void put(String key, String value) {
+        prefs.put(key, value);
+    }
+
+    public Optional<String> get(String key) {
+        return Optional.ofNullable(prefs.get(key, null));
+    }
+}

src/main/java/util/Util.java

@@ -0,0 +1,19 @@
+package util;
+
+import com.vaadin.flow.component.UI;
+import com.vaadin.flow.component.applayout.AppLayout;
+import com.vaadin.flow.server.VaadinSession;
+import com.vaadin.flow.server.WrappedSession;
+
+
+public class Util {
+    public static String getSessionAttributeWithDefault(WrappedSession currentSession, String key, String defaultValue) {
+        var result = defaultValue;
+
+        try {
+            result = currentSession.getAttribute(key).toString();
+        } catch (Exception e) {}
+
+        return result;
+    }
+}