How to open and close a webview on the basis of an event continuously

[berender mavi]

Hi All,

I am working on a retail store application in which I have to display a error screen on the monitor of a Billing counter if some backend apis are not working. So there is background recursive application which keeps pinging another api for status, if status if unsatisfactory if continuously show error page in webview on monitor so that it can't be used by any person. Once application receives OK response from another api it needs to terminate that error page. So this process keeps going.

I am able to display the error page but once my error page is displayed my background application is not able to proceed further and do recursive check and check for api status again. Once the webview is displayed, My main thread is not going further thread.sleep and recursive call to checkForAPIStatus.

Spring Boot Main File:-

private static void checkForAPIStatus(String[] args) {

        //String[] priceapistatus = APIHealthStatus();
        // logger.info("Main method. " + json.get("status"));
        System.out.println("checkForAPIStatus method started....");
        String randomS = RandomStringFromArray();
        System.out.println("String from random array is: "+randomS);
        if (randomS.equals("Unsatisfactory")) {
            //APIHealthStatus();
            //if (json.get("status").equals("Unsatisfactory")) {
            if (jframe == false) {
                    bringUpFrame.ShowBanner(args);
                    jframe = true;
            }
        } else {
            if (jframe == true) {
                try {
                    bringUpFrame.stop();
                } catch (Exception e) {
                    e.printStackTrace();
                }
                //System.out.println("frame closed...");
            }
            jframe = false;

        }
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        checkForAPIStatus(args);

    }

public static String RandomStringFromArray() {

        String[] arr = {"Unsatisfactory", "Ok"};

        Random r = new Random();

        int randomNumber = r.nextInt(arr.length);
        return arr[randomNumber];

    }

To make it easy as of now instead of api status I have taken a random status from array.

BringupBanner class is as follows:

public class BringUpFrame extends Application{

	static Logger logger = LoggerFactory.getLogger(BringUpFrame.class);
	private static Stage stage;

	@Override
	public void start(Stage primaryStage) throws Exception {
		int width = 0;
		int height = 0;
		String ScrnResol = getScreenResolution();
		String[] ScreenResolution = ScrnResol.split(",");

		try {
			width = Integer.parseInt(ScreenResolution[0]);
			height = Integer.parseInt(ScreenResolution[1]);

		} catch (NumberFormatException nfe) {
			logger.info("NumberFormatException: " + nfe.getMessage());
		}

		WebView webView = new WebView();
		WebEngine webEngine = webView.getEngine();
		URL resource = getClass().getClassLoader().getResource("test.htm");
		webEngine.load( resource.toString() );
		Scene scene = new Scene(webView,width,height);
		primaryStage.setScene(scene);
		primaryStage.setAlwaysOnTop(true);
		primaryStage.setFullScreen(true);
		primaryStage.setFullScreenExitHint("");
		primaryStage.show();
		stage = primaryStage;
	}


	public void ShowBanner(String[] args) {
		launch(args);
	}

	public void stop() throws Exception {
		Platform.exit();
	}

	public String getScreenResolution() {

		GraphicsDevice gd = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice();
		int width = gd.getDisplayMode().getWidth();
		int height = gd.getDisplayMode().getHeight();

		String resolution = width + "," + height;
		logger.info("Till Resolution is (width,height) : " + resolution);
		return resolution;

	}
}

Can anybody please point out what's wrong here or if there is a better way to achieve this ?

Thanks