package servicetest;

import javafx.application.Application;
import javafx.concurrent.Service;
import javafx.concurrent.Task;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

/**
 *
 * @author kcr
 */
public class ServiceTest extends Application {

    class MyService extends Service<Void> {
        @Override protected Task<Void> createTask() {
            return new Task<Void>() {
                final long startTime = System.currentTimeMillis();
                long fib = 0;
                long fib1 = 0;
                long fib2 = 1;
                @Override protected Void call() throws Exception {
                    while (true) {
                        for (int i = 0; i < 100000; i++) {
                            fib = fib1 + fib2;
                            fib2 = fib1;
                            fib1 = fib;
                        }
                        System.err.println("" + fib);
                        Thread.sleep(100);
                        double elapsedTime = (double)(System.currentTimeMillis() - startTime) / 1000;
                        if (elapsedTime > 10.0) break;
                    }
                    System.err.println("Done");
                    return null;
                }
            };
        }
    }

    @Override public void start(Stage stage) {
        try {
            System.err.println("javafx.version = " + System.getProperty("javafx.version"));
        } catch (SecurityException ex) {
            System.err.println("" + ex);
        }

        final MyService service = new MyService();

        Button startButton = new Button("Start");
        startButton.setOnAction(e -> {
            service.start();
        });

        Button stopButton = new Button("Stop");
        stopButton.setOnAction(e -> {
            service.cancel();
        });

        Label status = new Label("");
        status.textProperty().bind(service.stateProperty().asString());

        HBox root = new HBox(startButton, stopButton, status);
        Scene scene = new Scene(root, 400, 300);
        stage.setScene(scene);
        stage.show();
    }

    public static void main(String[] args) {
        System.err.println("Hello");
        Application.launch(args);
    }
}