Spring injection with new Window (FXML) - javafx

Question

I use AnnotationConfigApplicationContext to load my spring configuration.
public class Main extends Application {
private AnnotationConfigApplicationContext applicationContext;
#Override
public void init() throws Exception {
applicationContext = new AnnotationConfigApplicationContext(ApplicationConfig.class);
}
#Override
public void start(Stage primaryStage) throws Exception{
FXMLLoader loader = new FXMLLoader(getClass().getResource("/org/test/view/main.fxml"));
loader.setControllerFactory(applicationContext::getBean);
Parent root = loader.load();
primaryStage.show();
primaryStage.setOnHidden(e -> Platform.exit());
}
and this is my ApplicationConfig
#Configuration
#ComponentScan
public class ApplicationConfig {
#Bean
public Executor executor() {
return Executors.newCachedThreadPool(r -> {
Thread t = new Thread(r);
t.setDaemon(true);
return t ;
});
}
Now I would like to inject this Executor instance into a new Stage (TestController.fxml) via FXMLLoader. How can I achieve that?
public void showNewWindow() {
try {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/org/test/view/TestController.fxml"));
Parent root1 = fxmlLoader.load();
Stage stage = new Stage();
stage.setScene(new Scene(root1));
stage.show();
} catch (Exception e) {
e.printStackTrace();
}
}
All help will be greatly appreciated. Thanks!

Answer 1

You can inject "well-known objects" into spring-managed beans. The application context itself is one such object, so in your main controller you can do:
public class MainController {
#Autowired
private ApplicationContext applicationContext ;
public void showNewWindow() {
try {
FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/org/test/view/TestController.fxml"));
fxmlLoader.setControllerFactory(applicationContext::getBean);
Parent root1 = fxmlLoader.load();
Stage stage = new Stage();
stage.setScene(new Scene(root1));
stage.show();
} catch (Exception e) {
e.printStackTrace();
}
}
// ...
}
Now the TestController will be spring-managed, so you can simply do
public class TestController {
#Autowired
private Executor executor ;
// ...
}