WildFly - getting resource from WAR

Question

I am using the following method to get a resource from WAR file in WildFly:

this.getClass().getResource(relativePath)

It works when the app

Answer 1

I ran into this same problem, and rather than define the resource as a shared module, I ended up working around this by using a ServletContextListener in my WAR.

In the contextInitialized method, I got the ServletContext from the ServletContextEvent and used its getResource("/WEB-INF/myResource") to get the URL to the resource inside my WAR file. It appears that in the ServletContextListener, the .getResource() method resolves as expected rather than to the "/modules/system/layers/base/org/jboss/as/ejb3/main/timers/" url. That URL can then be stored in the ServletContext for later use by your servlets or in an injected ApplicationScoped CDI bean.

@WebListener
public class ServletInitializer implements ServletContextListener {

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        try {
            final ServletContext context = sce.getServletContext();
            final URL resourceUrl = context.getResource("/WEB-INF/myResource");
            context.setAttribute("myResourceURL", resourceUrl);
        } catch (final MalformedURLException e) {
            throw new AssertionError("Resource not available in WAR file", e);
        }
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {}
}

or

@WebListener
public class ServletInitializer implements ServletContextListener {

    @Inject
    private SomeApplicationScopedBean myBean;

    @Override
    public void contextInitialized(ServletContextEvent sce) {
        try {
            final ServletContext context = sce.getServletContext();
            final URL resourceUrl = context.getResource("/WEB-INF/myResource");
            myBean.setResourceUrl(resourceUrl);
        } catch (final MalformedURLException e) {
            throw new AssertionError("Resource not available in WAR file", e);
        }  
    }

    @Override
    public void contextDestroyed(ServletContextEvent sce) {}
}