PostConstruct and PreDestroy in Factory beans

[karlmuscat]

Can someone explain why PostConstruct and PreDestroy are not triggered when a bean is created in a Factory class please? This is particularly needed when the class is part of an external library and a singleton bean needs to be created off it. Example:

@Factory
public class FactoryClass {
    @Bean(preDestroy = "shutdown")
    @Singleton
    Test testBean() {
        return new Test();
    }
}

// Below class is in another library
class Test {
    @PostConstruct
    public void init() {
        System.out.println(">>>> START");
    }

    @PreDestroy
    public void shutdown() {
        System.out.println(">>>> SHUTTING DOWN");
    }
}

In the above, the log lines are never printed. Is there another way how to do this?

[dstepanov]

The factory beans are not processed for the pre/post annotations

[karlmuscat]

thanks @dstepanov. could you point me to the documentation that states this please, as I couldn't find it. Also, what's the alternative to a factory bean that can make use of pre/post annotations?

[graemerocher]

just call the methods directly in your code

[karlmuscat]

although it defeats the purpose, that should be relatively easy for PostConstruct. what about the predestroy, if one requires graceful shutdown?

[graemerocher]

write an @EventListener void onShutdown(Shutdown event) and invoke it yourself. You will have more control over shutdown this way. If you need actual graceful shutdown (ie waiting for threads to stop) implement GracefulShutdownCapable in your factory.