CODEWITHSUNDEEP
helidon
tbsalling
tbsalling

Reputation: 4555

How to use Helidon for a command-line app?

I am writing a Java command-line application intended to read and write from a database and just finish executing, once it is done with its work.

It will never expose a REST interface to anyone nor will it need to start a server and listen on any ports.

So the app is something like this:

public class Main {

    public static void main(final String[] args) {
       // Start Helidon CDI, JTA, etc. - but not JAX-RS
       // No: Server.create().start();
       // No: io.helidon.microprofile.cdi.Main.main(args);

       // Do work
       MyApp myApp = CDI.current().select(MyApp.class).get();
       app.run();

       // Shutdown
       io.helidon.microprofile.cdi.Main.shutdown();
    }
}

But however I initialize the Helidon framework a web server is launched and starts to listen on port 8080 (or whatever). Even when using Helidon's Main.main(...) method a web server is launched.

So how do I startup/initialize Helidon for use with a command-line app with CDI, JTA, JPA but no web server?

In terms of Spring Boot I think I am requesting the Helidon equivalent of a CommandLineRunner.

Upvotes: 0

Views: 520

Answers (1)

Laird Nelson
Laird Nelson

Reputation: 16238

If all you want to do is start a CDI container so that your application can be managed by CDI, then you could probably just use SeContainerInitializer, which is just ordinary CDI. You can do this with or without Helidon.

If you want to use the Helidon JPA/JTA features, they are exposed via ordinary CDI portable extension machinery, so just put them on your classpath.

Upvotes: 0

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