Startup synchronization

To synchronize the application with JavaFX readiness, one can use the FxStartupLatch bean.

It provides an await method that is released when JavaFX app is ready (primary Stage instance is available).

That is used in the inner @RunOnFxThread to ensure app is ready.

@Inject
FxStartupLatch startupLatch;

/* *** */

// Blocking until FX env is ready
startupLatch.await();

// FX is ready

Alternatively, the FxApplicationStartupEvent or FxPostStartupEvent events can be observed.

Example of a SkipPredicate that can be used in conjunction with a @Scheduled

@Singleton
public class FxApplicationNotStarted implements SkipPredicate {

    private volatile boolean started;

    void onFxStartup(@Observes final FxPostStartupEvent event) {
        this.started = true;
    }

    @Override
    public boolean test(final ScheduledExecution execution) {
        return !this.started;
    }
}