Collections and Concurrency - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients

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the Executor . The reset() method can only be called when the Service<V> 's state is not Worker.State.SCHEDULED

or Worker.State.RUNNING . It simply unbinds the nine Service<V> properties from that of the underlying Task and

resets their values to fresh startup values: Worker.State.READY for the state property, and null or "" or false or -1

for the other properties. The restart() method simply cancels the currently executing Task , if any, and then does a

reset() followed by a start() . The cancel() method will cancel the currently executing Task , if any; otherwise it will

transition the Service<V> to the Worker.State.CANCELLED state.

Listing 7-10 illustrates using an instance of an anonymous subclass of the Service<V> abstract class to execute

Task s repeatedly in its own Executor .

Listing 7-10. ServiceExample.java

import javafx.application.Application;

import javafx.beans.binding.Bindings;

import javafx.beans.property.IntegerProperty;

import javafx.beans.property.ReadOnlyObjectProperty;

import javafx.beans.property.SimpleIntegerProperty;

import javafx.concurrent.Service;

import javafx.concurrent.Task;

import javafx.concurrent.Worker;

import javafx.geometry.HPos;

import javafx.geometry.Insets;

import javafx.geometry.Pos;

import javafx.scene.Scene;

import javafx.scene.control.Button;

import javafx.scene.control.Label;

import javafx.scene.control.ProgressBar;

import javafx.scene.control.TextField;

import javafx.scene.layout.BorderPane;

import javafx.scene.layout.ColumnConstraints;

import javafx.scene.layout.GridPane;

import javafx.scene.layout.HBox;

import javafx.stage.Stage;

import java.util.concurrent.atomic.AtomicBoolean;

public class ServiceExample extends Application {

private Model model;

private View view;

public static void main(String[] args) {

launch(args);

}

public ServiceExample() {

model = new Model();

}

@Override

public void start(Stage stage) throws Exception {

view = new View(model);

hookupEvents();

JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients

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