How to integrate Javafx with Springboot

Question

I’m on the following case:

I have an application developed with Spring Boot, and I am developing the front end with Javafx. It is a local application, not a web one. I can run the project, Spring runs, and the window prepared with Javafx appears. However, when trying to manipulate data, bringing them to be displayed in the window with Javafx, I get an error:

Cannot invoke "services.ClienteService.findAll()" because "this.cs" is null at com.fgwr.jpcorretora.FrontApp.<init>(FrontApp.java:39)

Without Javafx the application runs normally. I am running Javafx + Spring Boot as follows:

Spring Boot class:

@SpringBootApplication
public class JpcorretoraApplication implements CommandLineRunner {

@Autowired
ClienteService cs;

public JpcorretoraApplication() {
        List <Cliente> allcli = cs.findAll();
        for (Cliente cliente : allcli) {
            clienteData.add(cliente);
            System.out.println(cliente.getNome());
        }
    }
    
    public static void main(String[] args) {
        Application.launch(FrontApp.class, args);
    }

    @Override
    public void run(String... args) throws Exception {

Javafx class:

public class FrontApp extends Application {
    
    @Autowired
    ClienteService cs;
    
    private Stage primaryStage;
    private BorderPane rootLayout;
    private ConfigurableApplicationContext applicationContext;

    private ObservableList<Cliente> clienteData = FXCollections.observableArrayList();

    public FrontApp() {
        clienteData = (ObservableList<Cliente>) cs.findAll();
        for (Cliente cliente : clienteData) {
            System.out.println(clienteData);
        }
    }

    public ObservableList<Cliente> getClienteData() {
        return clienteData;
    }

    @Override
    public void init() {
        String[] args = getParameters().getRaw().toArray(new String[0]);
        this.applicationContext = new SpringApplicationBuilder().sources(JpcorretoraApplication.class).run(args);
    }

In any of the classes I try to perform my service cs, get the bug. From what I’ve worked on spring boot, I want it to be an injection failure, in which the service cs is not being injected when I try to work outside the context of Spring Boot, that is, inside javafx. I tried several solutions, but none satisfied my need.

All classes have their respective annotations correct (e.g.: @Service).

The idea is that I can recover the data from my database that is being operated by Jparepository in spring boot and move on to the javafx show on the screen. Anyone can help?

Answer 1

After studying a little, I got some solutions to the problem. The simplest and most functional for the scenario was:

1 - Register Applicationcontext in Javafx main class init method:

Myaccountmaindojavafx.java

    @Override
    public void init() {
        ApplicationContextInitializer<GenericApplicationContext> initializer = ac -> {

            ac.registerBean(Application.class, () -> MainJavaFX.this);
            ac.registerBean(Parameters.class, this::getParameters);
            ac.registerBean(HostServices.class, this::getHostServices);

        };
        this.applicationContext = new SpringApplicationBuilder().sources(MinhaClasseAplicaçãoSpring.class)
                .initializers(initializer).run(getParameters().getRaw().toArray(new String[0]));
    }

2 - Create a context injection class in the root package:

Springcontext.java.

public class SpringContext implements ApplicationContextAware {

    @Autowired
    static
    ApplicationContext context;
    
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        context = applicationContext;
        
    }
    
    public static ApplicationContext getAppContext() {
        return context;
     }

}

3 - Calling the Springcontext class IN THE METHOD THAT I WISH to perform the instantiation of my service within Springboot.

Editclientecontroller.java

    private void handleOk() {
        if (isInputValid()) {
            
            // Aqui iniciamos o contexto do SpringBoot chamando a class ApplicationContext atribuindo ela a variável context:
            ApplicationContext context = SpringContext.getAppContext();
            
            // Aqui chamamos o serviço do SpringBoot desejado, fazendo com que ele receba a bean clienteRepository vinda do ambiente do SpringBoot: 
            ClienteRepository repo = (ClienteRepository)context.getBean("clienteRepository");
            
            cliente.setNome(nomeField.getText());
            cliente.setEmail(emailField.getText());
            cliente.setDataNascimento(Date.from(dataNascimentoField.getValue().atStartOfDay(ZoneId.systemDefault()).toInstant()));
            cliente.setCpfOuCnpj(cpfField.getText());
            cliente.setRg(rgField.getText());
            cliente.setEstadoCivil(estadoCivilBox.getValue());
            
            // Aqui, executamos o serviço chamado pela nossa implementação do ApplicationContext:
            repo.save(cliente);
            okClicked = true;
            dialogStage.close();
        }
    }

I hope to help other colleagues who are also having this difficulty.