how to terminate a javafx.concurrent.Service in javafx 8 - javafx

Question

Hi this is the structure of my application.
MCVE:
#FXML
void OnSimulateClick(ActionEvent event) throws IOException {
if (event.getSource() == simulatebutton) {
primaryStage = (Stage) simulatebutton.getScene().getWindow();
pane = (Pane) FXMLLoader.load(TDC.class.getResource("view/Simulation.fxml"));
scene = new Scene(pane);
primaryStage.setScene(scene);
primaryStage.show();
}
}
FXML
<Pane prefHeight="500.0" prefWidth="750.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1" fx:controller="com.mdw.tdc.view.SimulationController" >
<children>
<Button fx:id="abortbutton" layoutX="650.0" layoutY="230.0" onAction="#onAbortClicked" text="Abort" />
<Button fx:id="homebutton" layoutX="650.0" layoutY="330.0"onAction="#onHomeClicked" text="Home" />
<TextArea fx:id="logscreen" layoutX="21.0" layoutY="20.0" prefHeight="395.0" prefWidth="600.0" />
</children>
</Pane>
controller
public class SimulationController implements Initializable {
#FXML
private Button homebutton;
#FXML
private TextArea logscreen;
#FXML
private Button abortbutton;
private Simulate simulate;
#Override
public void initialize(URL location, ResourceBundle resources) {
simulate = new Simulate(list, logscreen);
simulate.setOnCancelled(new EventHandler<WorkerStateEvent>() {
#Override
public void handle(WorkerStateEvent event) {
System.out.println("Simulation Aborted by User...");
}
});
simulate.setOnFailed(new EventHandler<WorkerStateEvent>() {
#Override
public void handle(WorkerStateEvent event) {
System.out.println("Simulation Failed...");
}
});
simulate.setOnSucceeded(new EventHandler<WorkerStateEvent>() {
#Override
public void handle(WorkerStateEvent event) {
System.out.println("Simulation Success...");
}
});
simulate.start();
}
#FXML
void onAbortClicked(ActionEvent event) throws IOException,
InterruptedException {
if (event.getSource() == abortbutton) {
simulate.cancel();
}
}
}
#FXML
void onHomeClicked(ActionEvent event) throws IOException {
if (event.getSource() == homebutton) {
simulate.reset();
/*back to Home screen*/
pane = (Pane) FXMLLoader.load(TDC.class.getResource("view/Simulation.fxml"));
scene = new Scene(pane);
primaryStage.setScene(scene);
primaryStage.show();
}
}
Simulate Sercice
public class Simulate extends Service<Void> {
private ObservableList<TestData> list;
private TextArea logscreen;
private ConsoleStream consoleStream;
public Simulate(ObservableList<TestData> list, TextArea logscreen) {
this.list = list;
this.logscreen = logscreen;
}
#Override
protected Task<Void> createTask() {
return new Task<Void>() {
#Override
protected Void call() throws Exception {
consoleStream = new ConsoleStream(logscreen);
consoleStream.start();
/*Some Code*/
System.out.println("End of Simulation");
return null;
}
};
}
/* Few other methods called from inside my code inside createTask()>call() method */
// using this method to flag when cancelled
public void isFlagged(boolean b) {
consoleStream.isFlagged(true);
consoleStream.setOnCancelled(new EventHandler<WorkerStateEvent>() {
#Override
public void handle(WorkerStateEvent event) {
consoleStream.reset();
}
});
consoleStream.cancel();
}
}
ConsoleStream Service
public class ConsoleStream extends Service<Void> {
private PipedOutputStream outPipedOutputStream, errorPipedOutputStream;
private PipedInputStream outPipedInputStream, errorPipedInputStream;
private TextArea logscreen;
private Console outCon;
public ConsoleStream(TextArea logscreen) {
this.logscreen = logscreen;
}
#Override
protected Task<Void> createTask() {
return new Task<Void>() {
#Override
protected Void call() throws Exception {
try {
System.err.flush();
System.out.flush();
outPipedInputStream = new PipedInputStream();
outPipedOutputStream = new PipedOutputStream(
outPipedInputStream);
System.setOut(new PrintStream(outPipedOutputStream));
errorPipedInputStream = new PipedInputStream();
errorPipedOutputStream = new PipedOutputStream(
errorPipedInputStream);
System.setErr(new PrintStream(errorPipedOutputStream));
outCon = new Console(outPipedInputStream, logscreen);
outCon.setOnCancelled(new EventHandler<WorkerStateEvent>() {
#Override
public void handle(WorkerStateEvent event) {
// TODO Auto-generated method stub
System.out.println("ConsoleStream Aborted by User...");
outCon.reset();
}
});
outCon.start();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
};
}
public void isFlagged(boolean b) {
outCon.cancel();
}
}
Console Service
public class Console extends Service<Void> {
private final InputStream inputStream;
private TextArea logscreen;
public Console(PipedInputStream errorPipedInputStream, TextArea logscreen) {
inputStream = errorPipedInputStream;
this.logscreen = logscreen;
}
#Override
protected Task<Void> createTask() {
return new Task<Void>() {
#Override
protected Void call() throws Exception {
while(isCancelled()){
inputStream.close();
break;
}
try {
InputStreamReader is = new InputStreamReader(inputStream);
BufferedReader br = new BufferedReader(is);
while (br.readLine() != null) {
String read = br.readLine();
logscreen.appendText(read + "\n");
}
is.close();
br.close();
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
};
}
}
This is the first attempt at JavaFx not sure this is good way of doing. any suggestions are appriciated
Thanks