another solution - maybe works in prod

src/hpoweb/HpowebUI.java

@@ -72,23 +72,16 @@ public class HpowebUI extends UI {
  private final static Object block = new Object();
 
  private static HpData hpData = null;
- private static GoogleAnalyticsTracker tracker;
-
- private static Label version;
-
- private static Label copyright;
-
- private static Link feedback;
-
- private static LazyComboBox<SearchableEntity> searchBar;
-
- public static Container gridContainer;
 
  @WebServlet(value = "/*", asyncSupported = true)
  @VaadinServletConfiguration(productionMode = false, ui = HpowebUI.class)
  public static class Servlet extends VaadinServlet {
  }
 
+ private static String ontologyVersion;
+
+ private GoogleAnalyticsTracker tracker;
+
  @Override
  protected void init(VaadinRequest request) {
 
@@ -111,21 +104,12 @@ protected void init(VaadinRequest request) {
  }
  }
 
- String ontologyVersion;
  if (doParseHpo) {
  ontologyVersion = hpData.getExtOwlOntology().getOntologyVersionIri().toString();
  }
  else {
  ontologyVersion = "some ontology version here";
  }
- version = new Label("Ontology version: " + ontologyVersion);
- copyright = new Label("Copyright 2018 - Sebastian Köhler & The Phenomics Group Berlin");
- feedback = new Link("Contact: [email protected]",
- new ExternalResource("http:https://phenomics.github.io/"));
-
- SearchBarFactory searchbarFactory = new SearchBarFactory();
- searchBar = searchbarFactory.getSearchBar(hpData);
- searchBar.setWidth("100%");
 
  /*
  * Set the site url template
@@ -142,12 +126,11 @@ protected void init(VaadinRequest request) {
  putParametersIntoUriFragment(request);
  }
  uriFragment = page.getUriFragment();
+
  /************************
  * Now the content displayed
  */
-
- gridContainer = refreshContent(uriFragment);
-
+ Container gridContainer = getContentContainer(uriFragment);
  setContent(gridContainer);
 
  page.addUriFragmentChangedListener(new UriFragmentChangedListener() {
@@ -156,8 +139,8 @@ public void uriFragmentChanged(UriFragmentChangedEvent source) {
  System.out.println("got a change in uri fragment here");
  Page page = HpowebUI.get().getPage();
  String uriFragment = page.getUriFragment();
- gridContainer = refreshContent(uriFragment);
- setContent(gridContainer);
+ Container newGridContainer = getContentContainer(uriFragment);
+ setContent(newGridContainer);
  }
  });
 
@@ -167,9 +150,15 @@ public void uriFragmentChanged(UriFragmentChangedEvent source) {
  * @param uriFragment
  * @return
  */
- public static Container refreshContent(String uriFragment) {
+ public static Container getContentContainer(String uriFragment) {
+
+ SearchBarFactory searchbarFactory = new SearchBarFactory();
+ LazyComboBox<SearchableEntity> searchBar = searchbarFactory.getSearchBar(hpData);
+ searchBar.setWidth("100%");
+
+ Container gridContainer = new Container();
 
- gridContainer = new Container();
+ gridContainer.removeAllComponents();
 
  // just a line that disappears on small devices
  addHorizontalLine(gridContainer);
@@ -218,6 +207,11 @@ else if (dataProvider instanceof IGeneDataProvider) {
 
  }
 
+ Label version = new Label("Ontology version: " + ontologyVersion);
+ Label copyright = new Label("Copyright 2018 - Sebastian Köhler & The Phenomics Group Berlin");
+ Link feedback = new Link("Contact: [email protected]",
+ new ExternalResource("http:https://phenomics.github.io/"));
+
  // just a line that disappears on small devices
  addHorizontalLine(gridContainer);
  addLabelRow(gridContainer, version);