Support for Java 9/10/11+

[tfr42]

Support for Java 9/10/11+ at compile- and runtime incl. module-info (introduced with project jigsaw/JSR 376).

Prerequistes:

• Support for Java SE 8 #625 support Java 8
• Full support for OpenJDK #929

References:

• https://github.com/deegree/deegree3/wiki/Java-SE-11-Support
• https://github.com/deegree/deegree3/wiki/End-of-Life-and-Support-Matrix (under discussion)

Funding (under discussion):

• https://wiki.osgeo.org/wiki/Java_2018_Code_Sprint

[tfr42]

To validate the runtime support a new Dockerfile with Tomcat 9 on Java 10 was added.

[tfr42]

Java SE 11 will be next LTS version of Oracle JDK, see http://www.oracle.com/technetwork/java/javase/eol-135779.html
For users it comes with a quite important change of the license. Running Oracle JDK in production systems will require a commercial license (subscription).

[tfr42]

• Branch for Java 11 support WIP: https://github.com/tfr42/deegree3/tree/feature/java11Updates-857
• Travis-ci job: https://travis-ci.org/tfr42/deegree3

Building deegree with OpenJDK 11 using docker:

docker run -it --rm -v "$PWD":/usr/src/deegree -v "$HOME/.m2":/root/.m2 -w /usr/src/deegree maven:3.5.4-jdk-11 mvn clean install -T 1C -fae -V -P oracle,mssql,integration-tests

Running deegree with Tomcat 9 on OpenJDK 10:

docker run -it --rm -v "$PWD"/deegree-services/deegree-webservices/target/deegree-webservices-${DEEGREE_VERSION}.war:/usr/local/tomcat/webapps/deegree-webservices.war -v "$HOME"/.deegree:/root/.deegree -p 8080:8080 tomcat:9.0.12-jre10

[tfr42]

Updates for building deegree with Maven and JDK 11:
docker run -it --rm -v "$PWD":/usr/src/deegree -v "$HOME/.m2":/root/.m2 -w /usr/src/deegree maven:3.6.1-jdk-11 mvn clean install -T 1C -fae -V -P oracle,mssql,integration-tests

Run deegree with Apache Tomcat 9 and JDK 11:
docker run -it --rm -v "$PWD"/deegree-services/deegree-webservices/target/deegree-webservices-${DEEGREE_VERSION}.war:/usr/local/tomcat/webapps/deegree-webservices.war -v "$HOME"/.deegree:/root/.deegree -p 8080:8080 tomcat:9.0-jre11

[tfr42]

Build job migrated to Jenkins CI: http://buildserver.deegree.org/view/Failing%20Jobs/job/deegree-3.4-openjdk11/

[tfr42]

PR #1154 contains the changes to support Java 11.
It requires the following PR to be merged (order of PR should be maintained):

• Removed redundant repository elements from sub modules #1142
• Changed access of deegree3 Demo to https #1143
• Added soapUI test module deegree-integrations-tests #1153
• Migrated findbugs plugin to spotbugs plugin #1152
• Improve jenkinsfile #1155
• Support of Java11 #1154

The build job to verify the build is: https://buildserver.deegree.org/view/misc/job/deegree-3.4/job/deegree-3.4-openjdk11/

[tfr42]

The TMC has decided to use OpenJDK 11/17 (LTS) Version from Eclipse Adoptium project called temurin: https://adoptium.net/releases.html

[tfr42]

Temurin 17 is installed on Jenkins CI.

[tfr42]

Build with JDK 11 is stable as of https://buildserver.deegree.org/view/misc/job/deegree-3.4/job/deegree-3.4-openjdk11/77/

[tfr42]

Build job https://buildserver.deegree.org/view/misc/job/deegree-3.4/job/deegree-3.4-openjdk11/ configured to archive WAR file.

[tfr42]

The task #934 is not required by now. To add the module info can be added in future versions.

[tfr42]

The support of Java 11 was fully implemented with the final version of deegree webservices v3.5, see https://github.com/deegree/deegree3/wiki/End-of-Life-and-Support-Matrix for more information.