Upgrade build to Gradle 2.4 [SPR-12772]

[spring-issuemaster]

Sam Brannen opened SPR-12772 and commented

Tweets and Blogs about Gradle 2.4

• Gradle 2.4: The fastest yet: Gradle blog
• Spring Security builds: tweet by Rob Winch
• Spring Framework builds: tweet by Sam Brannen

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Affects: 4.2 RC1

Issue Links:

• #16551 Upgrade build to Gradle 2.2.1 ("depends on")
• #17603 Upgrade build to Gradle 2.5 for JDK 9 support

Referenced from: commits ed60b8c

[spring-issuemaster]

Sam Brannen commented

Upgraded to Gradle 2.4 in GitHub commit ed60b8c.

[spring-issuemaster]

Juergen Hoeller commented

It seems we lost our ability to build on JDK 9? I get a "Could not find tools.jar" out of the Gradle compiler abstraction when executing the build on JDK 9 now...

Juergen

[spring-issuemaster]

Sam Brannen commented

Hmmmmm.... yeah, you're right: it fails for me on JDK 9 as well. :(

I'll look into it.

[spring-issuemaster]

Sam Brannen commented

Reopening in order to investigate compatibility issues with JDK 9.

[spring-issuemaster]

Juergen Hoeller commented

We may also decide that it's ok for our build to only work on JDK 8 for the time being... if Gradle 2.4 provides enough advantage to us.

We also have AspectJ 1.9 beta 1 in our setup just for the ability to build on JDK 9. It's not unfeasible to give up on that for Spring 4.2, just aiming for JDK 9 builds in our 4.3 line.

Juergen

[spring-issuemaster]

Sam Brannen commented

OK, Juergen Hoeller, I am marking this issue as resolved again since developers do in fact experience 30% faster builds.

Regarding support for JDK 9 with Gradle 2.4.x, I have raised an issue on the Gradle Forum.

Regards,

Sam

[spring-issuemaster]

Sam Brannen commented

Please keep in mind that it is always possible to downgrade to Gradle 2.2.1 locally for intermittent testing against JDK 9. So we still have the option of testing against JDK 9 when we need to, but the default will be to build against JDK 8 and Gradle 2.4

[spring-issuemaster]

Sam Brannen commented

Update: Gradle 2.5 will officially support JDK 9.

In fact, the Gradle 2.5 nightly build already supports building spring-test (and presumably the rest of the spring-framework) against JDK 9.

For details, see the comments from Adrian Kelly on the Gradle Forums.

See also: #17603