Spring 6 module introduction

[jansupol]

Signed-off-by: jansupol jan.supol@oracle.com

[wilkinsona]

Thanks, @jansupol. I've been trying to get Spring Boot working against a local build of your branch. One thing that tripped me up was the javaPre17 variant of SpringComponentProvider was being used instead of the java17 variant. As a result any Spring-managed beans were not available to Jersey as they should be. I think this was because I ran my local build (mvn -DskipTests=true clean install) with Java 8. Running it again with Java 17 resulted in a failure:

[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  47.955 s
[INFO] Finished at: 2022-04-04T21:18:19+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.0:compile (default-compile) on project jersey-media-sse: Compilation failure: Compilation failure: 
[ERROR] /Users/awilkinson/dev/eclipse-ee4j/jersey/media/sse/src/main/java/org/glassfish/jersey/media/sse/internal/JerseyEventSink.java:[34,44] cannot find symbol
[ERROR]   symbol:   class JerseyFlowSubscriber
[ERROR]   location: package org.glassfish.jersey.internal.jsr166
[ERROR] /Users/awilkinson/dev/eclipse-ee4j/jersey/media/sse/src/main/java/org/glassfish/jersey/media/sse/internal/JerseyEventSink.java:[48,45] cannot find symbol
[ERROR]   symbol: class JerseyFlowSubscriber
[ERROR] /Users/awilkinson/dev/eclipse-ee4j/jersey/media/sse/src/main/java/org/glassfish/jersey/media/sse/internal/JerseyEventSink.java:[60,5] method does not override or implement a method from a supertype
[ERROR] /Users/awilkinson/dev/eclipse-ee4j/jersey/media/sse/src/main/java/org/glassfish/jersey/media/sse/internal/JerseyEventSink.java:[79,5] method does not override or implement a method from a supertype
[ERROR] /Users/awilkinson/dev/eclipse-ee4j/jersey/media/sse/src/main/java/org/glassfish/jersey/media/sse/internal/JerseyEventSink.java:[105,5] method does not override or implement a method from a supertype
[ERROR] -> [Help 1]

I then tried just building the spring6 module (mvn -f ext/spring6 -DskipTests=true clean install) and that seems to have fixed the problem. I suspect this is user error in how I built the project, but wanted to mention it just in case.

[jansupol]

[ERROR] /Users/awilkinson/dev/eclipse-ee4j/jersey/media/sse/src/main/java/org/glassfish/jersey/media/sse/internal/JerseyEventSink.java:[48,45] cannot find symbol
[ERROR] symbol: class JerseyFlowSubscriber

Yes, I have seen this issue. The solution is to rebuild the core-common module.

Spring 6 does require JDK 17, that's why the javaPre17 classes.

[wilkinsona]

Thanks again, @jansupol. Once I had got the Jersey snapshot built correctly, I was able to get a clean build of Spring Boot with its Jersey support reinstated. The changes proposed here look good to me.

[jansupol]

Created CQs:

• Spring AOP
• Spring beans
• Spring core
• Spring Context
• Spring Web

[jansupol]

The CQs are resolved.

[senivam]

LGTM

[wilkinsona]

@jansupol Spring Framework 6 and Spring Boot 3 will have a Jakarta EE 9 (JAX-RS 3.0) baseline. Would it be possible for the new jersey-spring6 module to be included in a Jersey release that supports JAX-RS 3.0?

[jansupol]

@wilkinsona Yes. Jersey 3.0.5 is planned to contain the module. We plan the release at the end of this month.

[wilkinsona]

That's great. Thanks very much once again.