How should a build/launch tool best make use of modules?

Alan Bateman Alan.Bateman at
Sun Oct 4 07:13:23 UTC 2015

On 02/10/2015 18:20, Ron Pressler wrote:
> I don't think I entirely understand your answer. Do you mean that the 
> suggested method for solving transitive-dependency conflicts in Java 9 
> is still (the brittle) shadowing?
The module system isn't suggesting any solutions, it is instead leaving 
this problem to the build tools and containers.

> Also, the somewhat-less-hacky hack I was suggesting with agents isn't 
> to change the boot layer itself, but to leave it empty (aside from the 
> agent's module), and manually load the application through a new layer 
> (or multi-layer) configuration (which may be annoying to compute due 
> to the second problem).
Starting an application in its own layer should be fine, it might even 
use a different version of a module that the container (=agent in this 
case) is using. Multiple layers are fine too.

Technically of course the boot layer isn't empty here, there is at least 
two (container + java.base) but that is just a detail at this point.


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