JDK 20 snapshot available?

[hensan64]

Hi

I need support for JDK20.

aspectj-maven-plugin fails with:

[INFO]
[INFO] --- aspectj-maven-plugin:1.13.1:compile (compile_with_aspectj) ---
[INFO] Showing AJC message detail for messages of types: [error, warning, fail]
[ERROR] unrecognized single argument: "-20"
:
[ERROR] no sources specified
:

[kriegaex]

What exactly from Java 20 do you need?

[hensan64]

i want it to work with aspectj-maven-plugin that rely on aspectjrt / aspectjtools.

see error message in original message.

[kriegaex]

AspectJ Maven supports any Java source / target version AspectJ supports. Anyway, you didn't answer my question. Which Java 20 features are you trying to use? What stops you from using compliance level 17 or 19 on JDK 20? Why would you need 20?

[hensan64]

I work corporately, and for security reasons we need to lift Java continuously to get the latest bug fixes. We are using AspectJ in our internal product code and its maven plugin. So we are not looking at features, we are lifting in order not to get stuck on unsupported code. And to provide the latest language features to our users (it is a test framework). And in order to avoid a big bang problem when a new Java LTS is released we are lifting our code continuously to keep pace... And we want to make sure that the latest compliance level works as well...

[kriegaex]

You gave me no reason to prioritise this. You can run the latest JDK and said you don't need any new language features, of which in Java 20 there are only preview features anyway. You didn't mention a single one of them you want to use. Therefore, there is no need to compile with level 20. The big bang argument does not apply either, if you don't upgrade your code to always use the latest preview features.

You really need to give me more than that for me to cut a release just for you. Besides, JDK 20 support has long been fully functional in my developer version. I just want to avoid the overhead to perform and document a release the features of which nobody uses.

[hensan64]

Ok. You mention a developer version (java-20 branch). Do you make unofficial development releases to Maven ARM:s?

[kriegaex]

Whatever ARM means in this case, I am not sure. But I just pushed a new 1.9.20-SNAPSHOT (exact snapshot version is 1.9.20-20230608.070552-7) from the Java 20 branch to https://oss.sonatype.org/content/repositories/snapshots. You might need the exact snapshot in the future, if I decide to push another snapshot from the main branch without Java 20 stuff. But I will try to remember to always merge other changes into that branch and publish from there. I am working on AspectJ infrequently these days, so it is not going to change a lot, unless I find some free cycles.

Your feedback is welcome.

[hensan64]

Thanks for supporting. But I still get this error with 1.9.20-SNAPSHOT using target/source 20:

[INFO] --- aspectj-maven-plugin:1.13.1:compile (compile_with_aspectj) @ abc ---
[INFO] Showing AJC message detail for messages of types: [error, warning, fail]
[ERROR] unrecognized single argument: "-20"
:
[ERROR] no sources specified
:

Do you know where it originates?
When I run the very same with target/source 19 it works...

[kriegaex]

Then probably something in your Maven POM is wrong. But that is rather an AspectJ Maven than an AspectJ question. Anyway, I can help you if you post a sample project reproducing the problem on GitHub.

Update: My guess is, that you simply forgot to add a plugin dependency to aspectjtools in the correct version to AspectJ Maven as described in the plugin documentation, section "Usage - Upgrading or downgrading AspectJ".

[hensan64]

Both dependencies (rt, tools) are set to 1.9.20-SNAPSHOT in the plugin definition.

Keep ticket open until I have troubleshooted more.

[kriegaex]

Just post your POM(s), would you? This is geting tedious. How do you expect anyone to solve your problem with this kind of information hiding? And besides, 1.9.19 is wrong, you need 1.9.20-SNAPSHOT, which I produced for you with Java 20 support. The problem sits in front of the computer. I am closing this issue.

[hensan64]

Yes, I have run with 1.9.20-SNAPSHOT you provided as well, but in production we use 1.9.19. Just a typo...

Do not assume people are idiots. I am a senior SW developer, but the problem seems obscure.

The reason i have not posted the POM is that it is corporate and complicated.

Running:

mvn -e -X clean test -DskipTests

The aspect-maven-plugin produces this log, and the AJC compiler do not like the '-20' argument:

[DEBUG] Running : ajc -Xajruntimetarget:1.5 -encoding UTF-8 -20 -classpath ...

I guess it is the maven plugin that produces this AJC call.
Is the problem that the plugin adds the '-20' argument or should AJC take it, but somehow AJC is not the latest version (although set so in the pom)?

[kriegaex]

I did not say you are an idiot. I said that I need an MCVE to help you and that information hiding is a bad idea. I also said, the problem sits in front of the computer. That does not mean you are an idiot. It means that you are making a mistake, no more and no less. Can senior developers not make mistakes? BTW, if you are so senior, why don't you know that reproducibility is key to getting better help faster? Why are you ignoring my request to see your POMs or a full MCVE? Give me one, please, or we are done here. If I spend my Sunday afternoon to help you, make it easier for me, would you?

[hensan64]

Yes, I know reproducibility is important. We deal with that in our own code support. I realize it is difficult to do support via a GitHub Issues tab. It is a little tricky for me when i work corporately and can not publish everything so easily without purging every corporate string.
No need to work on Sunday... That is not my expectation.

I will keep on troubleshooting. I have cloned your repos...

But this would help a lot if you can answer during working hours.
In the maven log from the aspectj-maven-plugin executing:

mvn -e -X clean test -DskipTests

I get the following log, showing what is called internally in the plugin (I think):

[DEBUG] Running : ajc -Xajruntimetarget:1.5 -encoding UTF-8 -20 -classpath ...

Does AJC support the '-20' argument, or is the version of AJC wrong?

Have a good weekend.