*/
    public boolean calibrateCpuLoad() {
        return calibrateCpuLoad(0L);
    }

    /**
     * Calibrates the CPU load with a timeout.
     *
     * @param timeoutInMillis The timeout in milliseconds.
     * @return true if the CPU load is within the acceptable range, false otherwise.
     */
    public boolean calibrateCpuLoad(final long timeoutInMillis) {

    private static class TestSystemHelper extends SystemHelper {
        long processingTime = 0;
        long currentTime = System.currentTimeMillis();

        @Override
        public boolean calibrateCpuLoad() {
            // Do nothing
            return true;
        }

        @Override
        public long getCurrentTimeAsLong() {
            long time = currentTime;

        @Override
        public long getCurrentTimeAsLong() {
            return System.currentTimeMillis();
        }

        @Override
        public boolean calibrateCpuLoad() {
            return true;
        }
    }

    private static class MockPopularWordHelper extends PopularWordHelper {
        @Override
        public void clearCache() {

        }

        @Override
        public String generateDocId(Map<String, Object> map) {
            return "doc_" + System.currentTimeMillis();
        }

        @Override
        public boolean calibrateCpuLoad() {
            cpuLoadCallCount.incrementAndGet();
            return true;
        }

        @Override
        public void waitForNoWaitingThreads() {
            // Do nothing in test
        }

        systemHelper.setSystemCpuCheckInterval(100L);
        final boolean result = systemHelper.calibrateCpuLoad(1L);
        assertTrue(result || !result); // Can be either depending on CPU load
    }

    @Test
    public void test_calibrateCpuLoad_zeroTimeout() {
        final boolean result = systemHelper.calibrateCpuLoad(0L);
        assertTrue(result);
    }

    @Test

     */
    protected void process(final FessConfig fessConfig, final ThumbnailQueue entity) {
        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        systemHelper.calibrateCpuLoad();

        if (logger.isDebugEnabled()) {
            logger.debug("Processing thumbnail: {}", entity);
        }
        final String generatorName = entity.getGenerator();
        try {