@ConfigMapping not working in non-CDI context?

[edufolly]

I'm trying to use @ConfigMapping in non-CDI context and get a null pointer exception with Quarkus 2.5.4.Final.

Everything works great in Quarkus 2.3.1.Final like #20916

application.properties

server.host=https://myserver.com/client

ServerConfig.java

@ConfigMapping(prefix = "server")
public interface ServerConfig {

    String host();

}

ServerClient.java

@ApplicationScoped
public class ServerClient {

    public String get() {
        SmallRyeConfig config =
                ConfigProvider.getConfig().unwrap(SmallRyeConfig.class);

        ServerConfig server = config.getConfigMapping(ServerConfig.class);

        return server.host();
    }

}

ServerResource.java

@Path("/api/v1/server")
public class ServerResource {

    @GET
    public String getServer() {
        return new ServerClient().get();
    }

}

Am I doing something wrong?

[quarkus-bot[bot]]

/cc @manovotn, @mkouba

[edufolly]

Ping @radcortez

[radcortez]

Ah, because the mapping is not used in any injection point it is removed. You need to add the @Unremovable annotation to your mapping.

[mkouba]

Also you should not use the ServerClient bean like this: return new ServerClient().get(); but inject the bean in the ServerResource directly.

[edufolly]

Thanks @radcortez and @mkouba you are amazing! Both tips worked really well.

[edufolly]

Follow @mkouba answer:

application.properties

server.host=https://myserver.com/client

ServerConfig.java

@ConfigMapping(prefix = "server")
public interface ServerConfig {

    String host();

}

ServerClient.java

@ApplicationScoped
public class ServerClient {

    @Inject
    ServerConfig server;

    public String get() {
        return server.host();
    }

}

ServerResource.java

@Path("/api/v1/server")
public class ServerResource {

    @Inject
    ServerClient client;

    @GET
    public String getServer() {
        return client.get();
    }

}