Thanks Ferry,

Thanks a lot for the info. It will be very useful in the future. In this 
particular case since my references are optional i need to control the 
indeterminism. I used countdown latch but of course it created dead lock:).

Can you suggest a solution? Any will do, including redesigning the software :)

Regards
Daghan

Sent by MailWise<http://www.mail-wise.com/installation/2> – See your emails as 
clean, short chats.


-------- Original Message --------
From: Ferry Huberts <maili...@hupie.com>
Sent: Friday, October 14, 2016 08:05 AM
To: osgi-dev@mail.osgi.org
Subject: Re: [osgi-dev] DS component life cycle.


Mandatory references are always injected before activate.
Optional references can be injected either before or after activate.

On 13/10/16 23:00, Daghan ACAY wrote:
> Hi all,
>
> I am trying to create a component that is instantiated by ConfigAdmin
> and uses multiple references to operate. Basically the component should
> instantiate through a factory configuration and use that configuration
> to set up its own @Reference s. You can see the code here:
>
> https://github.com/daghanacay/com.easyiot.device/blob/master/com.easyiot.LT100H.device.provider/src/com/easyiot/LT100H/device/provider/LT100HDeviceImpl.java
>
> All the mentioned @Reference ed components are instantiated by
> configuration as well, so at a given time the @Reference might not be
> available but my own component should still work. yet should the
> Reference available then it should be injected, basic 0-1 strategy.
>
> Problem I am facing with the current form of the code is that, the
> @Reference injection is happening before the @Activate method is called.
> This leads to NPE in the @Reference method due to null configuration. Is
> it possible to make this code work such that config is provided to the
> component before the dependency injection?
>
> I have tried annotating the class fields and set them "volatile". I even
> make them a list and use the class fields in the activate method this
> time the class fields were null due to 0-1 strategy. so I end up with
> annotating the methods.
>
> I might have designed this all wrong, so any help simple or fundamental
> is appreciated.
>
> Regards
>
> -Daghan
>
> Sent by MailWise <http://www.mail-wise.com/installation/2> – See your
> emails as clean, short chats.
>
>
>
> _______________________________________________
> OSGi Developer Mail List
> osgi-dev@mail.osgi.org
> https://mail.osgi.org/mailman/listinfo/osgi-dev
>

--
Ferry Huberts
_______________________________________________
OSGi Developer Mail List
osgi-dev@mail.osgi.org
https://mail.osgi.org/mailman/listinfo/osgi-dev
_______________________________________________
OSGi Developer Mail List
osgi-dev@mail.osgi.org
https://mail.osgi.org/mailman/listinfo/osgi-dev

Reply via email to