User Federation Provider can't find resources exported by dependency

Extending the server
1

Hi guys, how are you? I’m a developer from Brazil and i’m trying to use Keycloak as an authorization server for my microservices.

I was able to deploy a Keycloak in Standalone Mode on Docker, and Deployed a User Federation Provider that will handle authentication of my external database users.

This provider have a common dependency that exports a yml with my external database connections.
The yml file is listed on my provider jar, but i get an error when i try to read it.

I tried to search about some possible solutions, but i dont found anything.

This is my Dockerfile:

FROM jboss/keycloak:12.0.4

COPY ./build/libs/*-all.jar /opt/jboss/keycloak/standalone/deployments/keycloak-user-federation.jar

This is my decompiled provider jar (i’m trying to access database.yml):

Screenshot from 2021-04-29 19-04-19
Screenshot from 2021-04-29 19-04-19419×621 31.9 KB

This is my jboss-deployment-structure.xml:

<?xml version="1.0" encoding="UTF-8"?>
<jboss-deployment-structure>
    <deployment>
        <dependencies>
            <module name="org.apache.commons.lang" />
        </dependencies>
        <resources>
            <resource-root path="/" />
        </resources>
    </deployment>
</jboss-deployment-structure>

Can anyone help me? I’ll really appreciate

2

What is the code you are using to load it? Something like this.getClass().getResourceAsStream("database.yml")? I’ve done a similar thing, and I’ve noticed that there is some variation of the path you must use based on how your packaging is done. You might have to use "/database.yml" or put it in some package and use "/com/example/database.yml". In any case, post your code that loads it, and the exception you’re seeing. Then, we might be able to help further.

3

Hi xgp, how are you?

First of all, thanks for the answer.

I’m using ClassGraph to read all my yml files.
This is the code that i’m using:

List<YAMLResource> ymls = new ArrayList<>();

try (ScanResult scanResult = new ClassGraph().scan()) {
     scanResult
         .getResourcesWithExtension("yml")
         .forEachByteArray((Resource res, byte[] content) -> {
                    ymls.add(new YAMLResource(res.getPath(), true));
         });
}

This code works outside keycloak, on my other applications.

I hope this might help understanding the problem.

Thanks!

4

Can you try running these, to see if they can load it?

this.getClass().getResourceAsStream("database.yml")
this.getClass().getResourceAsStream("/database.yml")

I’m guessing this might be an issue with using that helper inside Jboss/Wildfly. Have you got ClassGraph to work inside Wildfly? I see a few posts that indicate people have had trouble with it, and it may require some additional configuration in your jboss deployment descriptor.

5

That works!

It was a bug envolving ClassGraph and Wildfly. This is the [issue] that helped me found the problem(Use classgraph with wildfly modules · Issue #287 · classgraph/classgraph · GitHub).

But, now i’m having some trouble with a wildfly dependency.
Do you have any tip for updating wildfly dependencies? It looks that jandex has some difficulties to index guava 30.0-jre and that bug was fixed on a newer version, but i have no clue on how to update jandex on keycloak.

6

I don’t have any suggestions. Probably a better question for the Wildfly community.