Disposing objects created through @Provides

[Anurag Laddha]

Greetings,

I am creating objects in my application using following approach (using @Provides): https://github.com/google/guice/wiki/ProvidesMethods

public class SomeClassProvider extends AbstractModule {

   @Override

    protected void configure(){

    }

   @Provides

   @Singleton

    SomeClass getSomeClass(){

        //Create object of SomeClass using new SomeClass()

        return someClassObject;

    }

}

I access the instance of SomeClass using injector.getInstance(SomeClass.class). 

(I know this is not the way Guice must ideally be used. I should be injecting SomeClass wherever it is needed.

I am using this approach since i cannot inject non serialisable objects in the constructor of the class where SomeClass needs to be used. SomeClass may be a non serialiazable class)

Anyways, I want to know how do i dispose instance of SomeClass when the application shutsdown?

Thanks!

Anurag

[Robert Voliva]

There was a good response to a similar question a couple of weeks ago: Vyacheslav Rusakov <vya...@gmail.com>	May 14 (13 days ago)
to google-guice

If you just want spring-like @PostConstruct and @PreDestroy methods support then there are many libs that implements it like https://github.com/mycila/guice, https://github.com/Netflix/governator etc.

I even wrote my own https://github.com/xvik/guice-ext-annotations.

But, such things are against guice philosophy: https://github.com/google/guice/wiki/ModulesShouldBeFastAndSideEffectFree

In short, you should avoid implicit bootstrap logic and do some special lifecycle service with start/stop methods which should be called from outside world.

For example, in web application it could be servlet context listener which will call start / stop.

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[Anurag Laddha]

Thanks Robert. Will explore these options.