I need to create a security feature for my Javafx Login Gui Application. I need

Question

I need to create a security feature for my Javafx Login Gui Application. I need to enforce unsucessful login attemps by limiting 3 max unsuccessful log ons then system will automatically lock the login account.

package sdev425_2;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.control.PasswordField;
import javafx.scene.control.TextField;
import javafx.scene.layout.GridPane;
import javafx.scene.paint.Color;
import javafx.scene.text.Text;
import javafx.stage.Stage;

/**
*
* @author jim Adopted from Oracle's Login Tutorial Application
* https://docs.oracle.com/javafx/2/get_started/form.htm
*/
public class SDEV425_2 extends Application {
  

    @Override
    public void start(Stage primaryStage) {
        primaryStage.setTitle("SDEV425 Login");
        // Grid Pane divides your window into grids
        GridPane grid = new GridPane();
        // Align to Center
        // Note Position is geometric object for alignment
        grid.setAlignment(Pos.CENTER);
        // Set gap between the components
        // Larger numbers mean bigger spaces
        grid.setHgap(10);
        grid.setVgap(10);

        // Create some text to place in the scene
        Text scenetitle = new Text("Welcome. Login to continue.");
        // Add text to grid 0,0 span 2 columns, 1 row
        grid.add(scenetitle, 0, 0, 2, 1);

        // Create Label
        Label userName = new Label("User Name:");
        // Add label to grid 0,1
        grid.add(userName, 0, 1);

        // Create Textfield
        TextField userTextField = new TextField();
        // Add textfield to grid 1,1
        grid.add(userTextField, 1, 1);

        // Create Label
        Label pw = new Label("Password:");
        // Add label to grid 0,2
        grid.add(pw, 0, 2);

        // Create Passwordfield
        PasswordField pwBox = new PasswordField();
        // Add Password field to grid 1,2
        grid.add(pwBox, 1, 2);

        // Create Login Button
        Button btn = new Button("Login");
        // Add button to grid 1,4
        grid.add(btn, 1, 4);

        final Text actiontarget = new Text();
        grid.add(actiontarget, 1, 6);

        // Set the Action when button is clicked
        btn.setOnAction(new EventHandler<ActionEvent>() {

            @Override
            public void handle(ActionEvent e) {
                // Authenticate the user
                boolean isValid = authenticate(userTextField.getText(), pwBox.getText());
                // If valid clear the grid and Welcome the user
                if (isValid) {
                    grid.setVisible(false);
                    GridPane grid2 = new GridPane();
                    // Align to Center
                    // Note Position is geometric object for alignment
                    grid2.setAlignment(Pos.CENTER);
                     // Set gap between the components
                    // Larger numbers mean bigger spaces
                    grid2.setHgap(10);
                    grid2.setVgap(10);
                    Text scenetitle = new Text("Welcome " + userTextField.getText() + "!");
                    // Add text to grid 0,0 span 2 columns, 1 row
                    grid2.add(scenetitle, 0, 0, 2, 1);
                    Scene scene = new Scene(grid2, 500, 400);
                    primaryStage.setScene(scene);
                    primaryStage.show();
                   // If Invalid Ask user to try again
                } else {                  
                    final Text actiontarget = new Text();
                    grid.add(actiontarget, 1, 6);
                    actiontarget.setFill(Color.FIREBRICK);
                    actiontarget.setText("Please try again.");
                }

            }
        });
        // Set the size of Scene
        Scene scene = new Scene(grid, 500, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        launch(args);
    }

    /**
     * @param user the username entered
     * @param pword the password entered
     * @return isValid true for authenticated
     */
    public boolean authenticate(String user, String pword) {
        boolean isValid = false;
        if (user.equalsIgnoreCase("sdevadmin")
                && pword.equals("425!pass")) {
            isValid = true;
        }

        return isValid;
    }

}

Explanation / Answer

public class LoginController implements DialogController {

    @Autowired

    private AuthenticationManager authenticationManager;

@Autowired

private ScreensConfiguration screens;

private AutowireFXMLDialog dialog;

public void setDialog(AutowireFXMLDialog dialog)

{

this.dialog = dialog;

}

@FXML

Label header;

@FXML

TextField username;

@FXML

TextField password;

@FXML

public void login()

{

Authentication authToken = new UsernamePasswordAuthenticationToken(username.getText(),

password.getText());

try

{

authToken = authenticationManager.authenticate(authToken);

SecurityContextHolder.getContext().setAuthentication(authToken);

} catch (AuthenticationException e)

{

header.setText("Login failure, please try again:");

header.setTextFill(Color.DARKRED);

return;

}

dialog.close();

screens.showScreen(screens.customerDataScreen());

}

@FXML

public void employee()

{

username.setText("employee");

password.setText("lol");

}

@FXML

public void manager()

{

username.setText("manager");

password.setText("password");

}

}

===>SECOND PART IS ALSO LOGINPAGE AUTHENTICATION CODE:

LOGIN CONTROLLER CODE

}

2)THEN WE HAVE CREATE THE LOGIN MANAGER PAGE:

/**

MainViewController controller =

==>

WE USE FXML IS LOGIN PAGE
THATS WHY WE USE IT

logi n PAGE CONTROLLER; import javafx.event.*; import javafx.fxml.FXML; import javafx.scene.control.*; /** Controls the login screen */ public class LoginController { @FXML private TextField user; @FXML private TextField password; @FXML private Button loginButton; public void initialize() {} public void initManager(final LoginManager loginManager) { loginButton.setOnAction(new EventHandler<ActionEvent>() { @Override public void handle(ActionEvent event) { String sessionID = authorize(); if (sessionID != null) { loginManager.authenticated(sessionID); } } }); } /** * Check authorization credentials. * * If accepted, return a sessionID for the authorized session * otherwise, return null. */ private String authorize() { return "open".equals(user.getText()) && "sesame".equals(password.getText()) ? generateSessionID() : null; } private static int sessionID = 0; private String generateSessionID() { sessionID++; return "xyzzy - session " + sessionID;

}

2)THEN WE HAVE CREATE THE LOGIN MANAGER PAGE:

package login; import java.io.IOException; import java.util.logging.*; import javafx.fxml.FXMLLoader; import javafx.scene.*; /** Manages control flow for logins */ public class LoginManager { private Scene scene; public LoginManager(Scene scene) { this.scene = scene; } /** * Callback method invoked to notify that a user has been authenticated. * Will show the main application screen. */ public void authenticated(String sessionID) { showMainView(sessionID); }

/**

* Callback method invoked to notify that a user has logged out of the main application. * Will show the login application screen. */ public void logout() { showLoginScreen(); } public void showLoginScreen() { try { FXMLLoader loader = new FXMLLoader( getClass().getResource("login.fxml") ); scene.setRoot((Parent) loader.load()); LoginController controller = loader.<LoginController>getController(); controller.initManager(this); } catch (IOException ex) { Logger.getLogger(LoginManager.class.getName()).log(Level.SEVERE, null, ex); } } private void showMainView(String sessionID) { try { FXMLLoader loader = new FXMLLoader( getClass().getResource("mainview.fxml") ); scene.setRoot((Parent) loader.load());

MainViewController controller =

loader.<MainViewController>getController(); controller.initSessionID(this, sessionID); } catch (IOException ex) { Logger.getLogger(LoginManager.class.getName()).log(Level.SEVERE, null, ex); } } }

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