[TOSprint] Java 11 code sprint taking shape

[Jody Garnett]

aside: This work stated in the Bonn code sprint, with the JTS Topology
Suite being made available as a module, and GeoTools upgrading a key units
library that was incompatible with the Java 11.

Now that Java 11 is near its September 25th release we hope to see many
more projects taking part!

This will be an interesting transition for the java community:
- Java 11 is a LTS release, which in this case means oracle will sell you
support beyond the 6-months of public support.
- Other groups are rallying around offering LTS support of OpenJDK, for
example Red Hat is jumping from Java 8 to Java 11 for their customers.

--
Jody Garnett


On Mon, 17 Sep 2018 at 15:26, Jody Garnett <jody.garnett at gmail.com> wrote:

> When:  October 22-26th
> Where: North America (Victoria, BC), Europe (Italy or UK proposed),
> Oceania (recommendations welcome)
> Wiki: https://wiki.osgeo.org/wiki/Java_2018_Code_Sprint
>
> As some of you know the Java community has an interesting challenge ahead,
> with recent policy changes the Java platform is now seeing some change - *and
> we have a python 2 vs python 3 migration moment with the introduction a a
> "jigsaw module system"*
>
> Top level applications like GeoServer and GeoNetwork need to make some
> changes in order to run at all. Mostly this requires a dependency review,
> upgrading to new libraries such that are compatible with Java 11.
>
> Java libraries like JTS and GeoTools are put in an awkward position as
> they are a bottleneck on using the module system (popularly referred to as
> the module hell problem
> <http://blog.joda.org/2017/05/java-se-9-jpms-automatic-modules.html>). A
> further complication for modules is a restriction preventing two jars from
> making use of the same package.
>
> Planning is currently underway:
>
>    - GSIP 171 Java 18.9 Compatibility
>    <https://github.com/geoserver/geoserver/wiki/GSIP-171> (GeoServer)
>    - Strategy for GeoNetwork
>    <https://github.com/geonetwork/core-geonetwork/wiki/OSGeo-Java-codesprint-2018>
>    - Restructure GeoTools into Jigsaw modules
>    <https://github.com/geotools/geotools/wiki/Restructure-GeoTools-into-Jigsaw-modules>
>
> Recommended reading:
>
>    - What Comes After JDK 8?
>    <https://www.azul.com/what-comes-after-jdk-8/> - java release cycle
>    changes
>    - It's time! Migrating to Java 11
>    <https://medium.com/criciumadev/its-time-migrating-to-java-11-5eb3868354f9> -
>    spring upgrade example
>    - The State of the Module System
>    <http://openjdk.java.net/projects/jigsaw/spec/sotms> - technical
>    background
>
>
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