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From Jean-Baptiste Onofré ...@nanthrax.net>
Subject Re: Do we really need Quiesce support?
Date Tue, 10 Feb 2015 11:58:27 GMT
Hi Christian,

I don't think we use the Quiesce API (at least in Karaf). Maybe some 
other users use it, let's see ;)

Regards
JB

On 02/10/2015 09:15 AM, Christian Schneider wrote:
> In several places in aries we support the Quiesce API. As far as I
> understood its purpose is to shut down bundles without actually stopping
> them. It does not seem to be any standard as the interfaces are in the
> Aries namespace.
>
> The problem with it is that it complicates the code a lot. For example
> in jpa container we create a proxy for each EntityManager that also
> supports quiesce methods even though they are
> not part of the EntityManager interface. The code in other modules is
> similarly affected.
>
> Besides this I do not see anyone using the API. I am also not sure why
> we need it at all as OSGi already has nice lifecycle methods to stop
> bundles which should have a similar effect if implemented nicely. One
> other disadvantge of Quiesce is that you can only shut down a bundle.
> You can not restart it again.
>
> So the question is: Do we really need to support the Quiesce API? The
> code would be a lot less complex and error prone without it.
>
> WDYT?
>
> Christian
>
>

-- 
Jean-Baptiste Onofré
jbonofre@apache.org
http://blog.nanthrax.net
Talend - http://www.talend.com

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