How to inject config properties inside a Quarkus extension

Question

I'm trying to move the following (working) code to an extension:

@WebListener
public class StartupListener implements ServletContextListener {

    @ConfigProperty(name = "javax.faces.PROJECT_STAGE")
    String projectStage;

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        sce.getServletContext().setInitParameter("javax.faces.PROJECT_STAGE", projectStage);
    }

}

When I move this code to an extension runtime module the property is not resolved (it is null).

The extension source code can be found here.

I'll let other answer the core of the question but this property should really be read at build time. The project stage is well mapped with our notion of dev / test / prod and the notion of configuration profile. This should be read at build time and injected to the framework as part of the build time bootstrap approach instead of being a runtime property e.g. with quarkus.io/guides/extension-authors-guide#bytecode-recording — Emmanuel Bernard
Yes, agreed, it will be nice to have javax.faces.PROJECT_STAGE aligned with Quarkus stage so user doesn't even need to add an entry in application.properties (unless one wants to override the default stage behaviour) — rmpestano
You mean something like this @EmmanuelBernard? github.com/rmpestano/quarkus-myfaces/blob/… — rmpestano

rmpestano rmpestano · Accepted Answer · 2019-06-07T14:11:30

Managed to make it work programatically via config provider:

@Override
public void contextInitialized(ServletContextEvent sce) {
    Config config = ConfigProvider.getConfig();
    String projectStage = config.getValue("javax.faces.PROJECT_STAGE", String.class);
    sce.getServletContext().setInitParameter("javax.faces.PROJECT_STAGE", projectStage);
}

How to inject config properties inside a Quarkus extension

1 Answers