final long interval = updateInterval - updateTime;
                    if (interval > 0) {
                        // sleep
                        ThreadUtil.sleep(interval); // 10 sec (default)
                    }

                    systemHelper.calibrateCpuLoad();
                    systemHelper.waitForNoWaitingThreads();

                    intervalControlHelper.delayByRules();

import org.lastaflute.core.message.UserMessage;

/**
 * The keys for message.
 * @author FreeGen
 */
public class FessMessages extends FessLabels {

    /** The serial version UID for object serialization. (Default) */
    private static final long serialVersionUID = 1L;

    /** The key of the message:  */
    public static final String ERRORS_front_header = "{errors.front_header}";

    /** The key of the message:  */

        value = null;
        assertEquals("", dataStore.convertValue(Constants.DEFAULT_SCRIPT, value, paramMap));

        value = "";
        assertEquals("", dataStore.convertValue(Constants.DEFAULT_SCRIPT, value, paramMap));

        value = " ";
        assertNull(dataStore.convertValue(Constants.DEFAULT_SCRIPT, value, paramMap));
    }

    public static final String DEFAULT_CRON_EXPRESSION = "0 0 * * *";

    public static final String DEFAULT_SEARCH_LOG_CRON_EXPRESSION = "* * * * *";

    public static final String DEFAULT_DAILY_CRON_EXPRESSION = "0 0 * * *";

    public static final String DEFAULT_HOURLY_CRON_EXPRESSION = "0 * * * *";

    public static final int DEFAULT_INTERVAL_TIME_FOR_FS = 1000;

        }
    }

    default Object evaluateValue(final String scriptType, final String template, final Map<String, Object> paramMap) {
        if (StringUtil.isEmpty(template)) {
            return StringUtil.EMPTY;
        }

        return ComponentUtil.getScriptEngineFactory().getScriptEngine(scriptType).evaluate(template, paramMap);
    }

    default int getMaxSiteLength() {

@Retention(RUNTIME)
@Documented
@Constraint(validatedBy = CronExpressionValidator.class)
public @interface CronExpression {

    String message() default "{org.lastaflute.validator.constraints.CronExpression.message}";

    Class<?>[] groups() default {};

    Class<? extends Payload>[] payload() default {};

import org.codelibs.fess.util.ComponentUtil;

public class CrawlingInfoPager implements Serializable {

    private static final long serialVersionUID = 1L;

    public static final int DEFAULT_PAGE_SIZE = 20;

    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    private int allRecordCount;

    private int allPageCount;

    private boolean existPrePage;

    private boolean existNextPage;

import org.codelibs.fess.util.ComponentUtil;

public class FileAuthPager implements Serializable {

    private static final long serialVersionUID = 1L;

    public static final int DEFAULT_PAGE_SIZE = 20;

    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    private int allRecordCount;

    private int allPageCount;

    private boolean existPrePage;

    private boolean existNextPage;

import org.codelibs.fess.util.ComponentUtil;

public class WebConfigPager implements Serializable {

    private static final long serialVersionUID = 1L;

    public static final int DEFAULT_PAGE_SIZE = 20;

    public static final int DEFAULT_CURRENT_PAGE_NUMBER = 1;

    private int allRecordCount;

    private int allPageCount;

    private boolean existPrePage;

    private boolean existNextPage;

            minimum: 0
            exclusiveMinimum: false
            default: 0
            example: 0
        - name: offset
          in: query
          description: Offset from a start position
          required: false
          schema:
            type: integer
            minimum: 0
            exclusiveMinimum: false
            default: 0
            example: 0
        - name: num
          in: query