Well ok, silly me really because I think it is now clear that the "proper
answer" is that the module really needs to open the subdirectories.
opens dbmigration.postgres;
opens dbmigration.mysql;
So thanks and apologies Alan. It's all making sense to me now,
unfortunately I got muddled by that error.
Cheers, Rob.
On Mon, 20 Sept 2021 at 21:58, Rob Bygrave <robin.bygr...@gmail.com> wrote:
> *> "dbmigration" resources have not been copied into target/classes?*
>
> target/classes/dbmigration exists *BUT* ... now I noticed that
> dbmigration only contained other sub-directories (which then contain the
> resources). So putting an empty junk.txt file into dbmigration fixes the
> problem.
>
> So if the resource path only contains subdirectories then we get the
> InvalidModuleDescriptorException,
> to open resource paths they need to contain at least one file "at the top
> level". Hmmm, I'll have to ponder that - it seems pretty subtle.
>
> target/classes/dbmigration
> ├── postgres *(directory)*
> │ └── 1.0_initial.sql
> │ └── idx_postgres.migrations
> └── mysql *(directory)*
> │ └── 1.0_initial.sql
> │ └── idx_mysql.migrations
> └── junk.txt
> *<!-- ADDING THIS FIXES IT*
>
>
> Cheers, Rob
>
>
> On Mon, 20 Sept 2021 at 21:22, Alan Bateman <alan.bate...@oracle.com>
> wrote:
>
>> On 20/09/2021 09:55, Rob Bygrave wrote:
>> > Hi,
>> > I have a case where I believe I have a module where I would like to use:
>> >
>> > opens {package};
>> >
>> > ... *where {package} only contains resources*, there are no .class
>> files in
>> > {package}. Currently when {package} only contains resources, we get an
>> > InvalidModuleDescriptorException error:
>> >
>> > Error occurred during initialization of boot layer
>> > java.lang.module.FindException: Error reading module:
>> > /home/rob/github/avaje/test-modules/target/classes
>> > Caused by: java.lang.module.InvalidModuleDescriptorException: Package
>> > dbmigration not found in module
>> >
>> > module test.modules {
>> > ...
>> > opens dbmigration;
>> > }
>> You can open a package that only contains resources. The directory
>> structure above hints that this is a Maven project, it is possible that
>> the "dbmigration" resources have not been copied into target/classes?
>>
>> -Alan
>>
>
