How to go to Next Screen only when the Background thread is completed in javaFx - javafx-2

Question

I have the first scene in which I have a registration button on click of the button I try to establish a connection to my server in a background thread. Now I want to go to next scene only when I gets 200 as response code from my server.
I have used Service class for background thread.I have also created a method to change the scene but I am not able to understand where and when to call mehod.
public class MainController implements Initializable {
int responseCodeFromServer;;
// creating background thread
private Service<Void>backgroundThread;
backgroundThread = new Service<Void>()
{
#Override
protected Task<Void> createTask() {
return new Task<Void>() {
#Override
protected Void call() throws Exception
{
// Now here we will try to establish the connection with the Server
EstablishServerConnection obj = new EstablishServerConnection();
responseCodeFromServer = obj.establishConnectionToServer(registrationBeanObj);
System.out.println("Response Code received in UI thread "+ responseCodeFromServer);
if(responseCodeFromServer == 200)
{
updateMessage("All Ok");
// now when we get response code as 200 then we need to take the user to the next window
}
else
{
updateMessage("Server Issue");
}
// TODO Auto-generated method stub
return null;
}
};
}
};
// we will define here what will happen when this background thread completes its job successfully (we can also try for failed or cancelled events)
backgroundThread.setOnSucceeded(new EventHandler<WorkerStateEvent>()
{
#Override
public void handle(WorkerStateEvent event) {
// TODO Auto-generated method stub
if(responseCodeFromServer == 200)
{
System.out.println("Done");
}
// It is a good idea to unbind the label when our background task is finished
status.textProperty().unbind();
}
});
// we need to bind status label text property to the message property in our background thread
status.textProperty().bind(backgroundThread.messageProperty());
// we need to start our background thread
backgroundThread.restart();
}
#Override
public void initialize(URL location, ResourceBundle resources) {
// TODO Auto-generated method stub
System.out.println("Hello World");
}
public void goToProductKey(ActionEvent event) throws IOException
{
Parent goToProductKeyParent = FXMLLoader.load(getClass().getResource("ProductKeyFXML.fxml"));
Scene goToProductKeyScene = new Scene(goToProductKeyParent);
// This line gets the stage Information
Stage window = (Stage)((Node)event.getSource()).getScene().getWindow();
window.setScene(goToProductKeyScene);
window.show();
}
My Question is I want to go to next scene only when i get 200 as response code from my server.I am new to JavaFX

Answer 1

backgroundThread.setOnSucceeded(new EventHandler<WorkerStateEvent>()
{
#Override
public void handle(WorkerStateEvent event)
{
// TODO Auto-generated method stub
if(responseCodeFromServer == 1)
{
Parent goToProductKeyParent = null;
try {
goToProductKeyParent = FXMLLoader.load(getClass().getResource("ProductKeyFXML.fxml"));
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
Scene goToProductKeyScene = new Scene(goToProductKeyParent);
// This line gets the stage Information
Stage window = (Stage) rootPane.getScene().getWindow();
//Stage window = (Stage)((Node)event.getSource()).getScene().getWindow();
window.setScene(goToProductKeyScene);
window.show();
}
// It is a good idea to unbind the label when our background task is finished
status.textProperty().unbind();
}
});
// we need to bind status label text property to the message property in our background thread
status.textProperty().bind(backgroundThread.messageProperty());
// we need to start our background thread
backgroundThread.start();