[keycloak-user] Use keycloak classes from a custom Authenticator: NoClassDefFoundError

[Daniel.Meyerholt at eventim.de]

Hi, 
I do not know your exact project setup but you have to declare any dependencies as wildfly isolates classloaders.
As AbstractIdpAuthenticator is included in the keycloak-services module, you can use this In the jar's META-INF/MANIFEST.MF:
Dependencies: org.keycloak.keycloak-services

Maybe additional Modules have to be included as well.

See appropriate documentation of how to do this in your favourite build tool.

See http://docs.wildfly.org/17/Developer_Guide.html#ear-class-loading (applies to keycloak's jar mechanism as well)

Best
Daniel

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Von: keycloak-user-bounces at lists.jboss.org <keycloak-user-bounces at lists.jboss.org> Im Auftrag von Christophe de Vienne
Gesendet: Mittwoch, 4. September 2019 11:32
An: keycloak-user at lists.jboss.org
Betreff: [keycloak-user] Use keycloak classes from a custom Authenticator: NoClassDefFoundError

Hi everyone,

I want to write a custom Authenticator that borrow code from AbstractIdpAuthenticator (or better, extends it).

However, as soon as my authenticator attempts to load a class from the keycloak-services package, I get a NoClassDefFoundError. For example:

08:24:53,608 ERROR [org.keycloak.services.error.KeycloakErrorHandler]
(default task-6) Uncaught server error: java.lang.NoClassDefFoundError:
org/keycloak/authentication/authenticators/broker/util/SerializedBrokeredIdentityContext

I used the authenticator example provided in the examples directory as a base for writing the pom.xml file.

Should I be able to use or extend keycloak classes from within my provider (packaged as a jar, I also tried wildfly:deploy)?

If so, what am I missing?

I also posted a question on stackoverflow, you may find some relevant detail in it:
https://stackoverflow.com/questions/57778240/noclassdeffounderror-in-a-provider-jar-when-using-a-class-from-org-keycloak-auth

Thanks,

Christophe
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