Progress report on SLF4J project modularization

Ceki Gülcü ceki at
Sat Mar 25 08:04:56 UTC 2017

On 3/25/2017 8:47, Alan Bateman wrote:
> On 24/03/2017 17:41, Ceki Gülcü wrote:
>> Hi All,
>> The initial phase of SLF4J project modularization in preparation for
>> Java 9/Jigsaw went well. I ran into many wrinkles most of which were
>> due to my own ignorance about Java 9 modules.
>> You can see the results at
>> Now that the initial phase of modularization is done, I looked at
>> creating mutlti-release jars for the SLF4J project. However, after
>> having spent 2 full days on trying to get Maven to do multi-release
>> jars, I am giving up without having made any measurable progress.
> Just curious, why you do need a MR-JAR? Aside from the
> module-info.class, do you have other source/classes that use APIs that
> are new for Java SE 9 or code that uses sun.* APIs that have been
> encapsulated or removed in JDK 9? If it's just the module-info.class
> then you should only need to create a modular JAR. The module-info.class
> will be ignored when on JDK 8 or older.

Right, project code does not have anything Java9 specific except 

So if I understand correctly, source code except would 
need to be compiled targeting an older java version, say 1.6, and would be compiled targeting Java 9, everything placed 
at their usual non-MR-JAR destinations.

I'll give it a shot next week.

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