How to use Jetty quickstart with embedded Jetty?

Question

https://eclipse.dev/jetty/documentation/jetty-12/operations-guide/index.html#og-quickstart

Is it possible to use Jetty Quickstart with embedded Jetty. We do not have a web.xml.

Our goal is to decrease startup times by eliminating Jetty's classpath scanning. If we cannot get Quickstart to work,

1. is it possible to retrieve everything that Jetty registered during classpath scanning, and
2. can we disable Jetty's classpath scanning and instead manually specify classes?

final WebAppContext context = new WebAppContext();

final ResourceFactory resourceFactory = ResourceFactory.of(context);

context.setDisplayName("PORTAL");
context.setContextPath("/");

final Resource webRootResource = findWebRoot(resourceFactory);

context.setBaseResource(webRootResource);

context.setAttribute("org.eclipse.jetty.server.webapp.ContainerIncludeJarPattern", ".*");
context.setConfigurationDiscovered(true);
context.setParentLoaderPriority(true);
context.setConfigurations(new Configuration[] {
        new AnnotationConfiguration(),
        new WebAppConfiguration(),
        new WebInfConfiguration(),
        new WebXmlConfiguration(),
        new MetaInfConfiguration(),
        new FragmentConfiguration(),
        new EnvConfiguration(),
        new PlusConfiguration(),
        new JettyWebXmlConfiguration(),
        new JakartaWebSocketConfiguration()
});

Answer 1

Webapps (either *.war files, or exploded directories) are the only thing in Jetty that have the auto-discovery / bytecode scanning features.

The quickstart mechanism is for webapps.

It works by having the webapp initialization look for a WEB-INF/quickstart-web.xml during the startup of the WebAppContext.

See Enable Jandex index for Jetty for how to do generate that WEB-INF/quickstart-web.xml in an embedded mode application.

If you don't need a war file, use a ServletContextHandler and just add all of the servlets / filters / listeners your application needs against that ServletContextHandler. There will be no auto discovery performed.