private static final String DELAYED_UNASSIGNED_SHARDS = "delayed_unassigned_shards";
    private static final String TASK_MAX_WAIT_TIME_IN_QUEUE_IN_MILLIS = "task_max_waiting_in_queue_millis";
    private static final String ACTIVE_SHARDS_PERCENT_AS_NUMBER = "active_shards_percent_as_number";
    private static final String ACTIVE_PRIMARY_SHARDS = "active_primary_shards";

    }

    @Override
    protected String asEsIndex() {
        return "fess_config.thumbnail_queue";
    }

    @Override
    public String asEsIndexType() {
        return "thumbnail_queue";
    }

    @Override
    public String asEsSearchType() {
        return "thumbnail_queue";
    }

    @Override
    public ThumbnailQueueDbm asDBMeta() {
        return ThumbnailQueueDbm.getInstance();

    @Override
    public ThumbnailQueueDbm asDBMeta() {
        return ThumbnailQueueDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "thumbnail_queue";
    }

    // ===================================================================================
    //                                                                              Source

                    intervalControlHelper.delayByRules();

                    if (logger.isDebugEnabled()) {
                        logger.debug("Processing documents in IndexUpdater queue.");
                    }

                    updateTime = systemHelper.getCurrentTimeAsLong();

                    List<EsAccessResult> arList = getAccessResultList(cb, cleanupTime);

            final Queue<SearchLog> queue = searchLogQueue;
            searchLogQueue = new ConcurrentLinkedQueue<>();
            processSearchLogQueue(queue);
        }

        if (!clickLogQueue.isEmpty()) {
            final Queue<ClickLog> queue = clickLogQueue;
            clickLogQueue = new ConcurrentLinkedQueue<>();
            processClickLogQueue(queue);
        }
    }

    @Override
    public ThumbnailQueueDbm asDBMeta() {
        return ThumbnailQueueDbm.getInstance();
    }

    @Override
    public String asTableDbName() {
        return "thumbnail_queue";
    }

    @Override
    public boolean hasSpecifiedColumn() {
        return _specification != null;
    }

    @Override
    public ConditionQuery localCQ() {
        return doGetConditionQuery();

import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.stream.Collectors;

import javax.annotation.Resource;

import org.apache.logging.log4j.LogManager;

    String INDEX_DOCUMENT_CRAWLER_INDEX = "index.document.crawler.index";

    /** The key of the configuration. e.g. 10 */
    String INDEX_DOCUMENT_CRAWLER_QUEUE_number_of_shards = "index.document.crawler.queue.number_of_shards";

    /** The key of the configuration. e.g. 10 */
    String INDEX_DOCUMENT_CRAWLER_DATA_number_of_shards = "index.document.crawler.data.number_of_shards";

index.document.update.index=fess.update
index.document.suggest.index=fess
index.document.crawler.index=fess_crawler
index.document.crawler.queue.number_of_shards=10
index.document.crawler.data.number_of_shards=10
index.document.crawler.filter.number_of_shards=10
index.document.crawler.queue.number_of_replicas=1
index.document.crawler.data.number_of_replicas=1
index.document.crawler.filter.number_of_replicas=1

            if (!cleanup) {
                return executorService.submit(() -> process(fessConfig, entity));
            }
            if (logger.isDebugEnabled()) {
                logger.debug("Removing thumbnail queue: {}", entity);
            }
            return null;
        }).filter(f -> f != null).forEach(f -> {
            try {
                f.get();
            } catch (final Exception e) {