Missing dependency while setting up webserver with oidc keycloak following the official tutorial

[FedericoMenegoz]

Environment Details

• Helidon Version:4.1.3
• Helidon SE
• JDK version:

openjdk 22.0.1 2024-04-16
OpenJDK Runtime Environment Temurin-22.0.1+8 (build 22.0.1+8)
OpenJDK 64-Bit Server VM Temurin-22.0.1+8 (build 22.0.1+8, mixed mode, sharing)

• OS: Zorin OS 17.2 Core 64bit
• Docker version (if applicable): Docker version 27.3.1

---

Problem Description

I encounter some exception following this this guide while trying to setup keycloak with open id connect in Helidon.

Steps to reproduce

I followed step by step this guide and when I build and run the application I get this exception:

Exception in thread "main" java.lang.NoClassDefFoundError: io/helidon/webclient/api/WebClientConfig$Builder
        at io.helidon.security.providers.oidc.common.OidcConfig$Builder.build(OidcConfig.java:998)
        at io.helidon.security.providers.oidc.common.OidcConfig.create(OidcConfig.java:464)
        at io.helidon.security.providers.oidc.OidcFeature$Builder.config(OidcFeature.java:695)
        at java.base/java.util.Optional.ifPresentOrElse(Optional.java:196)
        at io.helidon.security.providers.oidc.OidcFeature$Builder.config(OidcFeature.java:724)
        at io.helidon.security.providers.oidc.OidcFeature.create(OidcFeature.java:218)
        at io.helidon.examples.quickstart.se.Main.routing(Main.java:59)
        at io.helidon.webserver.WebServerConfigSupport$ListenerCustomMethods.routing(WebServerConfigSupport.java:158)
        at io.helidon.webserver.ListenerConfig$BuilderBase.routing(ListenerConfig.java:277)
        at io.helidon.examples.quickstart.se.Main.main(Main.java:42)
Caused by: java.lang.ClassNotFoundException: io.helidon.webclient.api.WebClientConfig$Builder
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
        ... 10 more

I added the following dependencies:

<dependency>
    <groupId>io.helidon.webclient</groupId>
    <artifactId>helidon-webclient-api</artifactId>
</dependency>
<dependency>
    <groupId>io.helidon.webclient</groupId>
    <artifactId>helidon-webclient-http1</artifactId>
</dependency>

Then I got the following exception:

Exception in thread "main" io.helidon.common.config.ConfigException: Unknown provider configured. Expected providers with types: [security], but only the following providers are supported: [cors, observe], provider interface: io.helidon.webserver.spi.ServerFeatureProvider, configured service: io.helidon.webserver.spi.ServerFeature
	at io.helidon.builder.api.ProvidedUtil.servicesFromObject(ProvidedUtil.java:231)
	at io.helidon.builder.api.ProvidedUtil.discoverServices(ProvidedUtil.java:168)
	at io.helidon.builder.api.Prototype$ConfiguredBuilder.discoverServices(Prototype.java:122)
	at io.helidon.webserver.WebServerConfig$BuilderBase.preBuildPrototype(WebServerConfig.java:443)
	at io.helidon.webserver.WebServerConfig$Builder.buildPrototype(WebServerConfig.java:655)
	at io.helidon.webserver.WebServerConfig$Builder.build(WebServerConfig.java:662)
	at io.helidon.examples.quickstart.se.Main.main(Main.java:43)

Finally I added this dependency:

<dependency>
    <groupId>io.helidon.webserver</groupId>
    <artifactId>helidon-webserver-security</artifactId>
</dependency>

Now everything seems working, but it is not clear to me why I needed to add helidon-webclient-api and helidon-webclient-http1 while working on a web server. Could you please clarify if this is the right approach?
Cheers