Display content of JSP file in browser through Liferay Struts Action - liferay

Question

How to display the content of jsp file in browser through Liferay Struts Action (DXP 7.1)? I use the execute method with parameters of HttpServletRequest and HtttpServletResponse, and place the jsp file in resources/META-INF/resources, but it is not showing in the browser, also no any errors in microservice logs.
The project, where I'm implementing new functionality, use Scala and SBT, so I can't use maven or something else.
I tried to follow the official documentation of overriding Liferay Struts action on their page, but it describe case for DXP 6.x version, despite this, I still tried the described approach using struts-config.xml, but it did not help.
The latest iteration of implementation based on of using requestDispatcher, but I'm not sure this is right:
class RedirectInfoAction extends BaseStrutsAction with LiferayLogSupport {
override def execute(
originalStrutsAction: StrutsAction,
request: HttpServletRequest,
response: HttpServletResponse
): String = {
log.info("Strut action execution started...")
getUserId(request) match {
case Some(_) =>
val servletContext = request.getSession().getServletContext
val requestDispatcher = servletContext.getRequestDispatcher("/page.jsp")
requestDispatcher.include(request, response)
case None =>
response.sendError(401, "The user is not authorized")
}
""
}

Answer 1

It all depends on how you deploy the code: You're just posting the code here, but if you look at the blade sample for a struts action, you'll see an additional critical part, which is the #Component section (granted, this requires using Java), as well as the #Reference to the servlet context.
You can also manually register such a service to the OSGi runtime, but that requires quite a lot of internal OSGi knowledge.
#Component(
immediate = true, property = "path=/portal/blade",
service = StrutsAction.class
)
public class BladeStrutsAction extends BaseStrutsAction {
public String execute(
HttpServletRequest httpServletRequest,
HttpServletResponse httpServletResponse)
throws Exception {
RequestDispatcher requestDispatcher =
_servletContext.getRequestDispatcher("/html/portal/blade.jsp");
requestDispatcher.forward(httpServletRequest, httpServletResponse);
return null;
}
#Reference(target = "(osgi.web.symbolicname=blade.strutsaction)")
private volatile ServletContext _servletContext;
}
(see the rest of the project as well: There's a bnd.bnd that contains information for the osgi.web.symbolicname configuration, etc)