response.setDateHeader(ParametredHttpServlet.HTTP_EXPIRES,
response.setDateHeader(ConfiguredHttpServlet.HTTP_EXPIRES,
    public void sendExpires(HttpServletResponse response) {        if (expiresDate > 0) {            response.setDateHeader(ParametredHttpServlet.HTTP_EXPIRES,                    expiresDate);            if (LOG.isTraceEnabled()) {                LOG.trace("Set expiration date to " + expiresDate);            }            return;        }        if (expiresDelay > 0) {            long d = System.currentTimeMillis() + expiresDelay;            response.setDateHeader(ParametredHttpServlet.HTTP_EXPIRES, d);            if (expiresMaxAge != null) {                response.setHeader(ParametredHttpServlet.HTTP_CACHE_CONTROL,                        expiresMaxAge);            }            if (LOG.isTraceEnabled()) {                LOG.trace("Compute expiration date: " + new Date(d)                        + " (delay=" + expiresDelay / Delay.SECOND + "s)");            }            return;        }        if (LOG.isTraceEnabled()) {            LOG.trace("No expiration defined");        }    }