enemies.add("Dave");
    assertEquals(1, goodFriends.size());
    assertEquals(2, immut.size());
    assertEquals(2, mut.size());
  }

  public void testSymmetricDifference() {
    Set<String> friends = Sets.newHashSet("Tom", "Joe", "Dave");
    Set<String> enemies = Sets.newHashSet("Dick", "Harry", "Tom");

        } else if (SearchLogPager.LOG_TYPE_SEARCH_COUNT_DAY.equalsIgnoreCase(pager.logType)) {
            list = (EsPagingResultBean<?>) searchLogBhv.selectPage(cb -> {
                cb.fetchFirst(0);
                createSearchLogCondition(pager, cb);
                cb.aggregation().setRequestedAt_DateHistogram(SearchLogPager.LOG_TYPE_SEARCH_COUNT_DAY, op -> {
                    op.calendarInterval(DateHistogramInterval.DAY);

        } else if (UPDATE_POLICY_DAILY.equals(updatePolicy)) {
            // Get local midnight boundary
            Calendar cal = Calendar.getInstance();

            cal.set(Calendar.HOUR_OF_DAY, 0);
            cal.set(Calendar.MINUTE, 0);
            cal.set(Calendar.SECOND, 0);
            cal.set(Calendar.MILLISECOND, 0);

            if (cal.getTime().after(lastModified)) {

    public static final String LOG_TYPE_SEARCH_COUNT_DAY = "search_count_day_agg";

    public static final String LOG_TYPE_SEARCH_USER_HOUR = "search_user_hour_agg";

    public static final String LOG_TYPE_SEARCH_USER_DAY = "search_user_day_agg";

    public static final String LOG_TYPE_SEARCH_REQTIMEAVG_HOUR = "search_reqtimeavg_hour_agg";

    public static final String LOG_TYPE_SEARCH_REQTIMEAVG_DAY = "search_reqtimeavg_day_agg";

        final Date date = new SimpleDateFormat("HH:mm").parse(time);
        return new IntervalControlHelper() {
            @Override
            protected Calendar getCurrentCal() {
                final Calendar cal = Calendar.getInstance();
                cal.setTimeInMillis(date.getTime());
                cal.set(Calendar.DAY_OF_WEEK, day);
                return cal;

    /**
     * Get the value for the key 'cookie.default.expire'. <br>
     * The value is, e.g. 3600 <br>
     * comment: The default expire of cookie in seconds e.g. 31556926: one year, 86400: one day
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getCookieDefaultExpire();

    /**

    }

    default void setPurgeUserInfoDay(final int value) {
        setSystemPropertyAsInt(Constants.PURGE_USER_INFO_DAY_PROPERTY, value);
    }

    default int getPurgeUserInfoDay() {
        return getSystemPropertyAsInt(Constants.PURGE_USER_INFO_DAY_PROPERTY, DfTypeUtil.toInteger(Constants.DEFAULT_PURGE_DAY));
    }

      @Override
      public Class<?> loadClass(String name) throws ClassNotFoundException {
        if (blocklist.contains(name)) {
          throw new ClassNotFoundException("I'm sorry Dave, I'm afraid I can't do that.");
        }
        if (name.startsWith(concurrentPackage)) {
          Class<?> c = findLoadedClass(name);
          if (c == null) {
            return super.findClass(name);

    public static final String PURGE_SEARCH_LOG_DAY_PROPERTY = "purge.searchlog.day";

    public static final String PURGE_USER_INFO_DAY_PROPERTY = "purge.userinfo.day";

    public static final String PURGE_JOB_LOG_DAY_PROPERTY = "purge.joblog.day";

    public static final String PURGE_BY_BOTS_PROPERTY = "purge.by.bots";

            URL url = new URL(originalRepository.getUrl());
            return ("http".equalsIgnoreCase(url.getProtocol())
                            || "dav".equalsIgnoreCase(url.getProtocol())
                            || "dav:http".equalsIgnoreCase(url.getProtocol())
                            || "dav+http".equalsIgnoreCase(url.getProtocol()))
                    && !isLocal(url.getHost());
        } catch (MalformedURLException e) {