private Servlet getDefaultErrorServlet()

in src/main/java/org/apache/sling/servlets/resolver/internal/SlingServletResolver.java [602:635]

26 lines of code
4 McCabe index (conditional complexity)


    private Servlet getDefaultErrorServlet(
            final SlingHttpServletRequest request,
            final Resource resource,
            final ResourceResolver resolver) {

        // find a default error handler according to the resource type
        // tree of the given resource
        String extension = request.getRequestPathInfo().getExtension();
        final ResourceCollector locationUtil = new ResourceCollector(
            ServletResolverConstants.DEFAULT_ERROR_HANDLER_METHOD,
            DEFAULT_ERROR_HANDLER_RESOURCE_TYPE, resource,
            extension, this.executionPaths.get(), this.useResourceCaching);
        final Servlet servlet = getServletInternal(locationUtil, request, resolver);
        if (servlet != null) {
            return servlet;
        }

        // if no registered default error handler could be found use
        // the DefaultErrorHandlerServlet as an ad-hoc fallback
        Servlet fallbackServlet = fallbackErrorServlet.get();
        if (fallbackServlet == null) {
            // fall back to an adhoc instance of the DefaultErrorHandlerServlet
            // if the actual service is not registered (yet ?)
            try {
                fallbackServlet = new DefaultErrorHandlerServlet();
                fallbackServlet.init(new SlingServletConfig(servletContext,
                    null, "Sling (Ad Hoc) Default Error Handler Servlet"));
                fallbackErrorServlet.set(fallbackServlet);
            } catch (ServletException se) {
                LOGGER.error("Failed to initialize error servlet", se);
            }
        }
        return fallbackServlet;
    }