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Hi Alan.
> Can you paste in the code that creates the ModuleClassLoader for
> the second Layer? I'm curious to see if you have used the 2-arg
> constructor to specify the first as the parent.
The code was the same for both:
ClassLoader loader =
new ModuleClassLoader(configuration);
After your mail I changed it for the second layer so it uses the first
layer's ModuleClassLoader. Now everything works like a charm. Thx!
Follow up question: In this case I constructed the first layer myself
and only used one class loader for it, which I hence had readily
available to pass to the second layer.
What happens if this is not the case? I know about 'Layer.findLoader'
but how would I choose a loader for the second layer? E.g. if I used
several loaders or the first layer or did not even create it myself
and have no idea which and how many loaders it contains.
> The beforeFinder is for overriding a module with a different
> version. It sounds like you have ended up trying to override the
> modules in the boot layer and you probably don't want to do that.
That makes sense, thanks.
so long ... Nicolai
On 12.10.2015 23:24, Alan Bateman wrote:
>
>
> On 12/10/2015 21:44, Nicolai Parlog wrote:
>> :
>>
>> For the first layer 'parentLayer' is 'Layer.boot()', for the
>> second it's the first.
> Can you paste in the code that creates the ModuleClassLoader for
> the second Layer? I'm curious to see if you have used the 2-arg
> constructor to specify the first as the parent.
>
>>
>> Then I add a read edge from the module that runs all this to the
>> one in the second layer that contains the code I actually want to
>> execute. Finally I access the code I actually want to run (in the
>> second layer) and invoke it. I then get a NoClassDefFoundError
>> for a class that is present in the first layer.
>>
>> I tried adapting the 'parentLayer' to be used as the
>> 'beforeFinder' in 'Configuration.resolve' instead of
>> 'ModuleFinder.empty()' but that gave me a
>> 'LayerInstantiationException' ("Module java.base is already
>> defined").
>
> The beforeFinder is for overriding a module with a different
> version. It sounds like you have ended up trying to override the
> modules in the boot layer and you probably don't want to do that.
>
> -Alan.
>
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