Configuration reloading via Tomcat 7 parallel deployment ?

[Tom Zeller]

On Nov 24, 2013, at 9:50 AM, "Rod Widdowson" <rdw at steadingsoftware.com> wrote:

>> -----Original Message-----
>> From: dev-bounces at shibboleth.net [mailto:dev-bounces at shibboleth.net]
>> On Behalf Of Cantor, Scott
> 
>> I really am hard pressed to believe Spring is sophisticated enough to do
>> this for us.
> 
> 
> I discovered another wrinkle yesterday which I should have spotted earlier.
> There is at least one “service” which does not use Spring, and that is the
> LogbackLoggingService (we use Spring to configure it, it of itself uses
> JoranConfigurator).

Ha.

> 
> So, armed with this fresh knowledge and the discussions to date it feels
> that since we have one and are trying to tie ourselves in loops to not
> implement the other, we should just go ahead and implement the simple code
> that we have discussed.  
> 
> The output will be two concrete classes, LogbackService and SpringService.
> The later will be the class Tom suggested some time ago:
> 
> class SpringService<T extends ServicableComponent>  extents BaseService {
>    T getServiceableComponent();
> }
> 
> ServiceableComponent will have the expected methods (lock(), release() and
> unload()).  If we implement this as a base class to exploit Spring and make
> all the requisite plugins (filters, resolvers, …) implement Closeable we can
> be done in about 40 lines.
> 
> For the reload, we can borrow a lot of the existing infrastructure, but I
> also propose to jettison all the code around multiple states and performance
> tracking.  None of this has any homologs in V2 and, I feel, represents “work
> in progress” towards a design which was not completed.  We have cases to
> track the needs that this addresses and we can leave the base classes
> (net.shibboleth.idp.log.EventLogger and
> net.shibboleth.idp.log.PerformanceEvent) in place.
> 
> We can probably replace net.shibboleth.idp.service.Service with
> org.springframework.context.Lifecycle as well, even if we do not expect to
> leverage this right now.

This last part is what I think I want to do, but I can be wrong, haven't tried to type it yet. So, maybe keep that in mind if it helps.

Minimum time at the moment, thx for understanding.