Native Java Compiler as default instead of ecj

[tkobayas]

Currently drools has 2 compilers for DRL. Native and Eclipse.

Mario wrote: #6569 (comment)

I believe that at some point we could get rid of the Ecplise compiler and rely only on the native Java one

The first step is to make NativeJavaCompiler as default instead of EclipseJavaCompiler. If users have any issues, they should be able to switch back to EclipseJavaCompiler.

[tkobayas]

Firstly, I suspend this work until 10.2.x branching out to avoid any confusion. Also it will not drop ecj immediately. Just make the native compiler default as the first step. I'll communicate the plan in dev ML.

Currently, I'm using #6587 for the test.

• Set native as default
• Fix test cases which wrongly depend on ecj
• Consider framework-integration-tests. At the moment, I have the tests in my own repo.
• Fix VFS issue in native (class in war, jar in war)
• Fix for kie-maven-plugin (javaCompiler settings, fix in native for empty resources)
• Add unit tests for native
• TODO: check if quarkus/kogito use case is affected? (compiled by local jdk...?)