* Returns HTTP 429 (Too Many Requests) when CPU usage exceeds configurable thresholds.
 * Web and API requests have independent threshold settings.
 */
public class LoadControlFilter implements Filter {

    private static final Logger logger = LogManager.getLogger(LoadControlFilter.class);

    private static final int RETRY_AFTER_SECONDS = 60;

    private static final Set<String> STATIC_EXTENSIONS =

        assertTrue(loadControlFilter.isExcludedPath("/favicon.ico"));
        assertTrue(loadControlFilter.isExcludedPath("/img/logo.svg"));
        assertTrue(loadControlFilter.isExcludedPath("/fonts/f.woff"));
        assertTrue(loadControlFilter.isExcludedPath("/fonts/f.woff2"));
        assertTrue(loadControlFilter.isExcludedPath("/fonts/f.ttf"));

  <filter>
    <filter-name>rateLimitFilter</filter-name>
    <filter-class>org.codelibs.fess.filter.RateLimitFilter</filter-class>
  </filter>

  <filter>
    <filter-name>loadControlFilter</filter-name>
    <filter-class>org.codelibs.fess.filter.LoadControlFilter</filter-class>
  </filter>

  <filter>
    <filter-name>corsFilter</filter-name>
    <filter-class>org.codelibs.fess.filter.CorsFilter</filter-class>
  </filter>