Eclipse Wildfly integration: Missing webapp resources on server

Question

I'm building a java web application with Vaadin, which generates some config files on maven build. For some unknown reasons, only a part of the generated files in WEB-INF are present on the when trying to full publish to Wildfly in Eclipse. (In particular, WEB-INF/classes/META-INF/VAADIN/config/stats.json is not present which results in an error in the Vaadin application.)

Several things that were tested

• Maven build does generate the file in the said location.
• Copying the War built by maven directly to /standalone/deployments results in a working application without error.
• After maven build and refresh in eclipse, the generated file is correctly shown in project explorer, indicating a successful refresh (right?)
• Another generated file in the same directory DO get copied (flow-build-info.json). The difference between these two files may be, that flow-build-info.json exists twice in target, in classes/META-INF/VAADIN... as well as in /[final name]/WEB-INF/classes/META-INF..., while stats.json only exists in /[final name]/WEB-INF/classes/META-INF....

Used versions

• Eclipse version: 21.12 & 21.9
• JBoss AS, WildFly & EAP Server Tools: 3.9.106.v20210618-2025
• Wildfly 17, 20, 22
• Vaadin 14.7.5

Answer 1

I found out the problem: Maven build generates the Vaadin files just fine. However, if a maven update is executed afterwards in Eclipse before publishing to the server, the maven update would modify the target/classes directory. This modification somehow removes all files but the flow-build-info.json (still don't understand this part). This results in the missing resources after publishing.

So basically, maven build -> refresh in eclipse -> NO MAVEN UPDATE -> full publish works.