Constructor of @Singleton called multiple times

reschifl Jul 9, 2012 5:15 AM

Hello,

I use a @Singleton EJB within some @SessionScoped CDI beans.

The singleton does some logging inside the constructor and the @PostConstruct method.

Deployed on a JBoss AS 7.1.1.Final I noticed that the constructor log statements are shown every time a new session starts.

But I expected that the constructor is only called once.

The @PostConstruct method is not called multiple times.

It this behavior correct?

To reproduce the effect, I created a simple example project:

Regards,

Lars

1. Re: Constructor of @Singleton called multiple times

jaikiran Jul 9, 2012 6:35 AM (in response to reschifl)

You shouldn't rely on the number of times a constructor is called. The spec has a note about this. It's the @PostConstruct which you should rely on - that will be called only once.
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2. Re: Constructor of @Singleton called multiple times

reschifl Jul 9, 2012 7:09 AM (in response to jaikiran)

You shouldn't rely on the number of times a constructor is called. The spec has a note about this. It's the @PostConstruct which you should rely on - that will be called only once.

The behavior irritated me, but if it is valid, then I it's ok.

Thank you for the answer!

Regards,
Lars
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