Java Virtal

[ News ] rss

February 01, 2011

Mark Wielaard: New GPG key. Finally created a new GPG key using gnupg. The old one was a DSA/1024 bits one and 8 years old. The new one is a RSA/2048 bits one. I will use the new one in the future to sign any release tarballs I might create. pub 2048R/57816A6A 2011-01-29 Key f...

More »

February 01, 2011

Andrew Hughes: [SECURITY] IcedTea6 1.7.8, 1.8.5, 1.9.5 Released!. We are pleased to announce a new set of security releases, IcedTea6 1.7.8, IcedTea6 1.8.5 and IcedTea6 1.9.5. This update contains the following security updates: The IcedTea project provides a harness to build the source code from OpenJDK6 u...

More »

272829 30   

[ Archives News
for 'Java Technology' ]

home > news > java technology > effective javafx architecture part 3 - asynchronous calls, command pattern and testability

Effective JavaFX Architecture Part 3 - Asynchronous calls, Command Pattern and Testability

In the previous installment of Effective Architecture, I covered TDD with Model-View-Presenter. However the code I presented had synchronous server calls. In JavaFX (like Swing), the UI code runs in the Event Dispatch Thread (EDT). It is unwise to block the EDT. Hence it is encouraged to execute all server calls on a separate thread. SwingWorker Swing provides SwingWorker to execute tasks off the EDT. SwingWorker also allows switching to EDT for things like setting the UI data etc. A snippet is shown below.  When a button is pressed, the SwingWorker executes the code in doInBackground() in background. When completed, the code returns the data as an Object. The SwingWorker then calls process() and done() on the EDT, to allow the user code to update the UI etc. Listing 1. SwingWorker final JButton button = new JButton("Save");ActionListener l = new ActionListener() {    public void actionPerformed(ActionEvent e) {    SwingWorker worker = new SwingWorker() {        protected Object doInBackground() throws InterruptedException {          //connect to server amd get data          return data;        }        protected void process(Object data) {          //update ui...

Date: July, 23 2010

Others News

© mobirise builder | it | website maker | top website builder |