*
 * @since 7.3
 */
public interface InternalStatusEvent extends InternalProgressEvent {
    long getProgress();

    long getTotal();

    String getUnits();

    }

    static <Q> Number percentChange(Amount<Q> current, Amount<Q> previous) {
        if (previous == Amount.valueOf(0, previous.getUnits())) {
            return 100 as Integer
        }
        BigDecimal result = (current - previous) / previous * 100
        return result.setScale(2, RoundingMode.HALF_UP)
    }

        this.units = units;
    }

    public long getProgress() {
        return progress;
    }

    public long getTotal() {
        return total;
    }

    public String getUnits() {
        return units;
    }

    }

    @Override
    public long getProgress() {
        return progress;
    }

    @Override
    public long getTotal() {
        return total;
    }

    @Override
    public String getUnits() {
        return units;
    }

        average = total.div(size());
        this.min = min;
        this.max = max;

        BigDecimal sumSquares = BigDecimal.ZERO;
        Units<Q> baseUnits = average.getUnits().getBaseUnits();
        BigDecimal averageValue = average.toUnits(baseUnits).getValue();
        for (Amount<Q> amount : this) {
            BigDecimal diff = amount.toUnits(baseUnits).getValue();

            OperationProgressDetails details = (OperationProgressDetails) progressEvent.getDetails();
            return new DefaultStatusEvent(progressEvent.getTime(), descriptor, details.getProgress(), details.getTotal(), details.getUnits());
        } else {
            return null;
        }
    }

    @Override

    public String toString() {
        if (cachedToString == null) {
            cachedToString = value + " " + units.format(value);
        }
        return cachedToString;
    }

    public Units<Q> getUnits() {
        return units;
    }

    public BigDecimal getValue() {
        return value;
    }

    /**
     * Returns a human consumable string representation of this amount.
     */

            progressEvent.getEventTime(),
            descriptor,
            progressEvent.getTotal(),
            progressEvent.getProgress(),
            progressEvent.getUnits()));
    }

    private void broadcastTaskProgressEvent(InternalProgressEvent event, InternalTaskDescriptor descriptor) {
        TaskProgressEvent taskProgressEvent = toTaskProgressEvent(event, descriptor);

                .execute().actionGet().getHits().getTotalHits().value > 0);

        urlQueueService.delete("sessionId");
        assertFalse(fesenClient.prepareSearch("fess_crawler.queue").setQuery(QueryBuilders.termQuery("sessionId", "sessionId")).setSize(0)
                .execute().actionGet().getHits().getTotalHits().value > 0);

    }

    public void test_insert_update_delete_multiTx() {

        String scrollId = response.getScrollId();
        try {
            while (scrollId != null) {
                final SearchHits searchHits = response.getHits();
                if (searchHits.getHits().length == 0) {
                    break;
                }

                for (final SearchHit searchHit : searchHits) {