[Springframework-developer] ContextClosedEvent

[Colin S. <col...@ex...>]

I'm just documenting somehting on the ContextClosedEvent. It's called 
when all singletons have been destroyed (i.e. destroy method has been 
called)

    public void close() {
        if (logger.isInfoEnabled()) {
            logger.info("Closing application context [" + 
getDisplayName() + "]");
        }

        // Destroy all cached singletons in this context,
        // invoking DisposableBean.destroy and/or "destroy-method".
        ConfigurableListableBeanFactory beanFactory = getBeanFactory();
        if (beanFactory != null) {
            beanFactory.destroySingletons();
        }

        // publish corresponding event
        publishEvent(new ContextClosedEvent(this));
    }

I've personally never used the context closed event, but what I have to 
ask here is, does nobody else think this sequence is not usable and/or 
potentially dangerous. On the not usable part, an event listener must 
not have a destroy method, since the onApplicationEvent() would end up 
being called after the bean has been destroyed. As for potentially 
dangerous, that's if somebody forgets that they can't have a destroy 
method, and then spring does call the two methods in the wrong sequence.

Colin