public void handleError()

in src/main/java/org/apache/sling/servlets/resolver/internal/SlingServletResolver.java [282:334]
34 lines of code
4 McCabe index (conditional complexity)

    public void handleError(final int status,
            final String message,
            final SlingHttpServletRequest request,
            final SlingHttpServletResponse response) throws IOException {

        // do not handle, if already handling ....
        if (request.getAttribute(SlingConstants.ERROR_REQUEST_URI) != null) {
            LOGGER.error("handleError: Recursive invocation. Not further handling status {}({})", status, message);
            return;
        }

        // start tracker
        RequestProgressTracker progressTracker = request.getRequestProgressTracker();
        String timerName = "handleError:status=" + status;
        progressTracker.startTimer(timerName);

        final ResourceResolver scriptResolver = this.getScriptResourceResolver();
        try {
            // find the error handler component
            Resource resource = getErrorResource(request);

            // find a servlet for the status as the method name
            String extension = request.getRequestPathInfo().getExtension();
            ResourceCollector locationUtil = new ResourceCollector(String.valueOf(status),
                    DEFAULT_ERROR_HANDLER_RESOURCE_TYPE, resource,
                    extension, this.executionPaths.get(), this.useResourceCaching);
            Servlet servlet = getServletInternal(locationUtil, request, scriptResolver);

            // fall back to default servlet if none
            if (servlet == null) {
                servlet = getDefaultErrorServlet(request, resource, scriptResolver);
            }

            // set the message properties
            request.setAttribute(ERROR_STATUS, Integer.valueOf(status));
            request.setAttribute(ERROR_MESSAGE, message);

            // the servlet name for a sendError handling is still stored
            // as the request attribute
            Object servletName = request.getAttribute(SLING_CURRENT_SERVLET_NAME);
            if (servletName instanceof String) {
                request.setAttribute(ERROR_SERVLET_NAME, servletName);
            }

            // log a track entry after resolution before calling the handler
            progressTracker.logTimer(timerName, "Using handler {0}", RequestUtil.getServletName(servlet));

            handleError(servlet, request, response);

        } finally {
            progressTracker.logTimer(timerName, "Error handler finished");
        }
    }