/** {@inheritDoc} */
@Override
protected void preparePaintComponent(final Request request) {
super.preparePaintComponent(request);
if (Cache.getCache().get(DATA_KEY) != null) {
poller.disablePoll();
}
}
/** Fakes a service call, using the WorkManager for threading. */
private void fakeServiceCall() {
poller.enablePoll();
Cache.getCache().invalidate(DATA_KEY);
new Thread() {
@Override
public void run() {
try {
Thread.sleep(SERVICE_TIME);
Cache.getCache().put(DATA_KEY, "SUCCESS!");
} catch (InterruptedException e) {
LOG.error("Timed out calling service", e);
Cache.getCache().put(DATA_KEY, "Timed out!");
}
}
}.start();
}
/** Creates a AjaxPollingWButtonExample. */
public AjaxPollingWButtonExample() {
setLayout(new FlowLayout(Alignment.VERTICAL, 0, 5));
WButton pollBtn = new WButton("Invoke service");
add(pollBtn);
WAjaxControl ajaxControl = new WAjaxControl(pollBtn, poller);
poller.add(myDataComponent);
myDataComponent.setVisible(false);
add(poller);
pollBtn.setAction(
new Action() {
@Override
public void execute(final ActionEvent event) {
myDataComponent.setVisible(true);
fakeServiceCall();
}
});
// make the image change an ajax request
add(ajaxControl);
}