Bootstrap Weld SE for Nested JARs

[thilo.tanner]

Hi all,

I'm currently trying to build a Java EE prototype counterpart to Spring Boot. At the moment I'm struggling to properly bootstrap Weld SE. I played around with several ways to package the app, but so far without success. Creating a shaded JAR doesn't work, because Weld will scan all classes which leads to other issues. So I decided to give "Nested JARs" a try (same format and Maven plugin as Spring Boot is using). This works, except that Weld SE cannot load the nested JARs properly:

WELD-ENV-000031: The bean archive reference /path/to/application.jar!/WEB-INF/lib/deltaspike-core-api-1.3.0.jar cannot be handled by any BeanArchiveHandler: [org.jboss.weld.environment.deployment.discovery.FileSystemBeanArchiveHandler@50b0636c] [main]

Before I re-create the bootstrap process in my code (similar to the Weld() class) and try to make  FileSystemBeanArchiveHandler work with nested JARs, I thought I ask in the forum if there is a smarter way to load extensions from nested JAR files. Would it help, if I package my app as a WAR?

Thanks and best,

Thilo

[mkouba]

Hi Thilo,

what exactly does "nested JARs" mean? From the log message it seems that you're basically building a WAR. This is not supported in Weld SE at the moment. FileSystemBeanArchiveHandler is not able to handle "nested" archives. You could try to use a shaded jar and exclude problematic classes by means of Exclude filters OR turn the archive into an implicit bean archive by setting bean-discovery-mode to annotated so that only classes with bean defining annotations are considered.

[jharting]

Can you be more specific about failures that occur when you use a shaded jar? We actually did some changes to allow this quite recently. Try Weld 2.2.10.Final or better. Alternatively, you can find an exclusion filter setup for the shaded usecase in the workaround description of this issue: https://issues.jboss.org/browse/WELD-1129

FYI I opened an issue to track nested archive support: https://issues.jboss.org/browse/WELD-1930