1) Moving to Java 9 as a base would be a terrible choice. Java 9 is a six-month release which is about to be replaced by Java 10, which will then be replaced by Java 11. Thus, Java 8 is the only sensible baseline right now.
2) Compiling a single jar file such that it works on Java 8 but has a module-info.class for Java 9 using Maven is a right pain in the backside. Most maven plugins cannot seamlessly handle it making the pom.xml much more complex. Note that you do not need a multi-release jar file to make it work. See https://github.com/ThreeTen/threeten-extra/blob/master/pom.xml 3) It is yet to be demonstrated that JPMS is going to be widely used. To release a jar file with JPMS module-info.class, it requires that ALL dependencies are also JPMS modules with either module-info.class or Automatic-Module-Name in the manifest. Most projects are nowhere near this position yet. Right now the plan for commons should be simple: - add Automatic-Module-Name to MANIFEST.mf to lock down the module name - if the project has no dependencies and runs on Java 6 or later, consider adding a module-info.java, with the awareness that this is a complex task Stephen On 7 March 2018 at 03:46, Kamila Molina Orellana <kamila.molin...@gmail.com> wrote: > Dear all, > > As an idea for GSoC that came up in , we want to settle some guidelines > that other commons projects might follow to make the shift. We came up with > some ideas in . I wanted to ask about some experience you have had while > moving to JDK 9 in other commons-projects. > > I wanted to propose this: > > 1. Make the movement of commons-rdf to JDK 9 generating modules > descriptions automatically through Maven. > 2. Generate integration tests to guarantee that modules are working as > expected with JDK 9. > 3. Maybe have multi-release JARs? > > Since other commons projects follow a similar structure, we can generate > some documentation in a wiki-like media. So, they can make the shit to JPMS > or at least have a guideline. Or I can contribute :D. > > Wha do you think? > > Regards, > ~Kamila. > > >  https://issues.apache.org/jira/browse/COMMONSSITE-103 >  https://issues.apache.org/jira/browse/COMMONSRDF-75 --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org