[WG: Sakai QA] [Building Sakai] SAK-15874 Java 1.6 transition

[Speelmon, Lance Day]

I think this is a fine idea and gets us to a point where we can compile and run under Java 6.  It would still give shops the choice of deploying under Java 5 if that makes sense to them.  L


Lance Speelmon
Scholarly Technologist

On Nov 18, 2009, at 11:01 AM, David Haines wrote:

The primary current goal for moving to Java 1.6 is to break the dependency on tools that will not be updated.  The least disruptive option for moving to Java 1.6 would be to just change the default Sakai build configuration to use the Java 1.6 SDK and JVM and set the compile options to expect 1.5 source and target a 1.5 JVM.  This requires only infrastructure changes. There have been installations running the current binaries with a 1.6 JVM so targeting a 1.5 JVM should not be a problem.

The changes required would be:
- Change the default SDK for compilation to be 1.6
- Add " -Dsun.lang.ClassLoader.allowArraySyntax=true " to JAVA_OPTS
- Modify GC parameters if necessary.

Changing the configuration on the QA servers ought to be straightforward. This means that the new releases would not be tested on a 1.5 JVM, but given limited resources we can't explicitly support everything forever.  Making the change now would provide installations time to make a planned transition rather than a sudden ad hoc transition when something breaks.  It also provides time for Sakai to move away from requiring 1.5 source compatibility gradually.

Comments?

- Dave

David Haines
CTools Developer
Digital Media Commons
University of Michigan
dlhaines at umich.edu<mailto:dlhaines at umich.edu>



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