The preview URL service in the Studio server can be obtained simply by referencing it by its interface. Let's say, you want to implement a new REST service and want to use the preview URL service. The basic approach using plain Spring Boot would be:

  @RestController
  public class CustomRestController {
    private final PreviewUrlService previewUrlService;
    public CustomRestController(PreviewUrlService previewUrlService) {
      this.previewUrlService = previewUrlService;
    }
    ...
  }