Try teavm

[sakirtemel]

Seems like a well supported project, and we may reduce the need of sending jars

[sakirtemel]

a couple of articles:

https://kliu.io/post/knoweth-teavm-first-look/

https://www.youtube.com/watch?v=kf-lUoVU-zc

https://blogs.oracle.com/javamagazine/post/java-in-the-browser-with-teavm

https://renato.athaydes.com/posts/comparing-jvm-alternatives-to-js.html

https://sjhannah.com/blog/2015/04/06/porting-java-project-to-the-web-with-teavm/

[sakirtemel]

some sort of tutorials to follow:

konsoletyper/teavm#296

https://stackoverflow.com/questions/4955635/how-to-add-local-jar-files-to-a-maven-project

[sakirtemel]

first try:

mvn_clean_package.txt

Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 61

second try with dev version 0.7.0-dev-1212:

log_v1212.txt

Caused by: java.lang.reflect.InaccessibleObjectException: Unable to make field private final java.util.Comparator java.util.TreeMap.comparator accessible: module java.base does not "opens java.util" to unnamed module @7b21d3c5

[WARNING] Error injecting: org.apache.maven.plugin.war.WarMojo
com.google.inject.ProvisionException: Unable to provision, see the following errors:

1) Error injecting constructor, java.lang.ExceptionInInitializerError
  at org.apache.maven.plugin.war.WarMojo.<init>(Unknown Source)
  while locating org.apache.maven.plugin.war.WarMojo

third try with maven-war-plugin 3.3.2:
compile.txt

attaching the pom:

pomxml.txt

mvn -e clean package

[sakirtemel]

Initialized teavm directory for trying affc58e

Basic application is able to run, and when I clicked on the index.html, I'm able to see Java-coded text rendered in browser

Now I'm going to add plantuml-wasm jar as a dependency and run some command in there 🤞

[sakirtemel]

@arnaudroques TeaVM worked for the main class :)

https://plantuml.github.io/plantuml-wasm/compiled-teavm/

https://github.com/plantuml/plantuml-wasm/blob/5c482adf1bfd948e2a1f34a72af033d006747e71/teavm/teavm-maven-webapp/src/main/java/org/teavm/Client.java#L15

I'm going to try it further, if TeaVM works, some of the complications we have with cheerpj will be resolved

[sakirtemel]

When I called the Utils ( https://github.com/plantuml/plantuml-wasm/blob/74b0f7b145fb9735518bd68346c05ebab933013a/teavm/teavm-maven-webapp/src/main/java/org/teavm/Client.java#L17 )

it gave such an error Caused by: java.lang.NullPointerException: Cannot read the array length because "<local7>" is null

also, even after it works, we probably will need to do something with the files

[arnaudroques]

it gave such an error Caused by: java.lang.NullPointerException: Cannot read the array length because "<local7>" is null

There are no stack trace somewhere? It would help to debug :-)

[sakirtemel]

I thought local7 is something known :) just added the result of mvn -e -X clean package, also used convertSvg instead of convertPng this time, just to see if the error would disappear.

compile.txt

Some of the issues are related to teavm, I saw something like https://teavm.org/docs/tooling/debugging.html and of course got help from https://github.com/konsoletyper/teavm/issues

from the log, I'm not able to understand which part of plantuml was failing

[sakirtemel]

@arnaudroques maybe you can run this pom with the source code instead of jar dependency? it may compile then, or give better errors actually?

https://github.com/plantuml/plantuml-wasm/blob/74b0f7b145fb9735518bd68346c05ebab933013a/teavm/teavm-maven-webapp/pom.xml

by the way, there's still no guarantee that teavm will actually work, but if it works, it'll be really great (no dependencies, simpler js files etc)

[arnaudroques]

I suggest that we keep this repo for cheerpj only.
For teavm experimentation, I've created another repo https://github.com/plantuml/teavm1

In this new repo, there is a very minimal version of PlantUML:

public class Run1 {

	public static void main(String[] args) throws IOException {
		System.err.println("Starting Run1");
		final BufferedImage img = new BufferedImage(100, 100, BufferedImage.TYPE_INT_ARGB);
		final String filename = args[0];
		final File file = new File(filename);
		System.err.println(file.getAbsolutePath());
		final FileOutputStream fos = new FileOutputStream(file);
		ImageIO.write(img, "png", fos);
		fos.close();
	}
}

So it only create a 100 x 100 white image.
Let's try to make this very simple example working with teavm.
We will increase complexity step by step :-)

Any though ?

[kongfu-cat]

I attempted to compile PlantUML using TeaVM, and then I find this issue.
How is the progress now? I noticed that the main branch still uses CheerpJ.

[sakirtemel]

How was your attempt? Did you try it with plantuml core or the binary from the website ? I haven’t tried it again as I was focusing on delivering the end to end solution, but happy to explore the teavm again. The main branch uses cherrpj and you can also see the plantuml-core repository is providing a lightweight version of cheerpj compiled plantuml + basic js.

…

On Tue, 26 Dec 2023 at 03:54, leye ***@***.***> wrote: I attempted to compile PlantUML using TeaVM, and then I find this issue. How is the progress now? I noticed that the main branch still uses CheerpJ. — Reply to this email directly, view it on GitHub <#9 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAHFKUEAX5B6BTL7FGB2UP3YLI4AHAVCNFSM6AAAAAAUG7JM4GVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQNRZGIYTIMJUGQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[kongfu-cat]

How was your attempt? Did you try it with plantuml core or the binary from the website ? I haven’t tried it again as I was focusing on delivering the end to end solution, but happy to explore the teavm again. The main branch uses cherrpj and you can also see the plantuml-core repository is providing a lightweight version of cheerpj compiled plantuml + basic js.

Not yet started😂