ThreadFactory factory1 = builder.setPriority(1).build();
    assertEquals(1, factory1.newThread(monitoredRunnable).getPriority());

    ThreadFactory factory2 = builder.setPriority(2).build();
    assertEquals(1, factory1.newThread(monitoredRunnable).getPriority());
    assertEquals(2, factory2.newThread(monitoredRunnable).getPriority());
  }

  public void testBuildTwice() {
    ThreadFactory unused;

    ThreadFactory factory1 = builder.setPriority(1).build();
    assertEquals(1, factory1.newThread(monitoredRunnable).getPriority());

    ThreadFactory factory2 = builder.setPriority(2).build();
    assertEquals(1, factory1.newThread(monitoredRunnable).getPriority());
    assertEquals(2, factory2.newThread(monitoredRunnable).getPriority());
  }

  public void testBuildTwice() {
    ThreadFactory unused;

        assertEquals(3, sitemaps.length);
        assertEquals("1.5", ((SitemapUrl) sitemaps[0]).getPriority());
        assertEquals("-0.5", ((SitemapUrl) sitemaps[1]).getPriority());
        assertEquals("abc", ((SitemapUrl) sitemaps[2]).getPriority());
    }

    public void test_parseXmlSitemaps_withInvalidChangefreq() {
        // Invalid changefreq values should be preserved

     * @param scoreBooster The score booster.
     */
    protected void addScoreBooster(final ScoreBooster scoreBooster) {
        scoreBoosterList.add(scoreBooster);
        scoreBoosterList.sort((b1, b2) -> b2.getPriority() - b1.getPriority());
    }

    /**
     * Returns the priority of this sitemap entry.
     * @return the priority
     */
    public String getPriority() {
        return priority;
    }

    /**
     * Sets the priority of this sitemap entry.
     * @param priority the priority to set
     */
    public void setPriority(final String priority) {
        this.priority = priority;
    }

    /**

                    buf = null;
                }
            } else if (PRIORITY_ELEMENT.equals(elementName) && buf != null && sitemapUrl != null) {
                sitemapUrl.setPriority(buf.toString().trim());
                buf = null;
            } else if (IMAGE_IMAGE_ELEMENT.equals(elementName)) {
                if (currentImage != null && sitemapUrl != null) {

                                    mojoExecution.setLifecyclePhase(phase);
                                    n.addMojo(mojoExecution, execution.getPriority());
                                    if (mojoDescriptor.getDependencyCollectionRequired() != null
                                            || mojoDescriptor.getDependencyResolutionRequired() != null) {

            threads[i] =
                    new Thread(crawlerThreadGroup, crawlerThread, "Crawler-" + crawlerContext.sessionId + "-" + Integer.toString(i + 1));
            threads[i].setDaemon(daemon);
            threads[i].setPriority(threadPriority);
        }

        // run
        crawlerContext.setStatus(CrawlerStatus.RUNNING);
        if (logger.isInfoEnabled()) {

            initParamMap.put(Constants.CRAWLING_INFO_ID, sid);

            final DataCrawlingThread dataCrawlingThread = new DataCrawlingThread(dataConfig, indexUpdateCallback, initParamMap);
            dataCrawlingThread.setPriority(crawlerPriority);
            dataCrawlingThread.setName(sid);
            dataCrawlingThread.setDaemon(true);

            dataCrawlingThreadList.add(dataCrawlingThread);

        }

        // run index update
        final IndexUpdater indexUpdater = ComponentUtil.getIndexUpdater();
        indexUpdater.setName("IndexUpdater");
        indexUpdater.setPriority(indexUpdaterPriority);
        indexUpdater.setSessionIdList(sessionIdList);
        indexUpdater.setDaemon(true);
        indexUpdater.setCrawlerList(crawlerList);