java - Example keycloak spring-boot app fails to find bean KeycloakSpringBootConfigResolver

Question

I'm trying to run example app from:

https://github.com/keycloak/keycloak-quickstarts/tree/latest/app-springboot

I'm getting error:

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APPLICATION FAILED TO START
***************************

Description:

Parameter 1 of method setKeycloakSpringBootProperties in org.keycloak.adapters.springboot.KeycloakBaseSpringBootConfiguration required a bean of type 'org.keycloak.adapters.springboot.KeycloakSpringBootConfigResolver' that could not be found.


Action:

Consider defining a bean of type 'org.keycloak.adapters.springboot.KeycloakSpringBootConfigResolver' in your configuration.


Process finished with exit code 1

Answer 1

I don't have a solution at the moment, but I can see that the exact same issue has been registered on the Keycloak Jira a couple of months ago: https://issues.jboss.org/browse/KEYCLOAK-10595. The problem seems to be caused by the code delivered with this PR: https://github.com/keycloak/keycloak/pull/6075.

The author of the PR described the problem in this way: "The only remaining problem is, that the resolver is usually contained in the configuration using the KeycloakAutoConfiguration (in my example the SharedConfiguration) so you are trying to access the bean while the configuration is stil being created. This can be solved by moving the resolver bean into another configuration which has to be loaded before the KeycloakAutoConfiguration." (source: https://issues.jboss.org/browse/KEYCLOAK-10334?focusedCommentId=13738518&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-13738518)

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UPDATE (OLD)

On the issue from the Keycloak Jira (https://issues.jboss.org/browse/KEYCLOAK-11282), a temporary workaround has been suggested.

@Configuration
public class MyKeycloakSpringBootConfigResolver extends KeycloakSpringBootConfigResolver {
    private final KeycloakDeployment keycloakDeployment;

    public MyKeycloakSpringBootConfigResolver(KeycloakSpringBootProperties properties) {
        keycloakDeployment = KeycloakDeploymentBuilder.build(properties);
    }

    @Override
    public KeycloakDeployment resolve(HttpFacade.Request facade) {
        return keycloakDeployment;
    }
}

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LATEST UPDATE

A simpler way to solve the problem is to declare a KeycloakSpringBootConfigResolver in a separate configuration class. This option will fix issues with both Spring Boot and Spring Security.

@Configuration
public class KeycloakConfig {

    @Bean
    public KeycloakSpringBootConfigResolver keycloakConfigResolver() {
        return new KeycloakSpringBootConfigResolver();
    }
}