@Test
    public void test_multiple_instances() {
        HotThreadMonitorTarget target1 = new HotThreadMonitorTarget();
        HotThreadMonitorTarget target2 = new HotThreadMonitorTarget();

        assertNotNull(target1, "First instance should not be null");
        assertNotNull(target2, "Second instance should not be null");
        assertNotSame(target1, target2, "Instances should be different objects");
    }

    @Test

    @Test
    public void test_multiple_instances() {
        SystemMonitorTarget target1 = new SystemMonitorTarget();
        SystemMonitorTarget target2 = new SystemMonitorTarget();

        assertNotNull(target1, "First instance should not be null");
        assertNotNull(target2, "Second instance should not be null");
        assertNotSame(target1, target2, "Instances should be different objects");
    }

    @Test

- Admin UI: http://localhost:8080/admin/ (default username/password is admin/admin)

![Admin UI](https://fess.codelibs.org/_images/fess_admin_dashboard.png)

You can register crawling targets in the Admin UI on the (Web, File, Data Store) crawler configuration pages, and then start the Crawler manually on the [Scheduler page](https://fess.codelibs.org/15.5/admin/scheduler-guide.html).

        final boolean result = testClient.reindexConfigIndices(false, empty);

        assertTrue(result);
        assertEquals("No indices should be created with empty targets", 0, testClient.createdIndices.size());
        assertEquals("No reindex should occur with empty targets", 0, testClient.reindexPairs.size());
    }

    // ==========================================================================

        JobLog jobLog = new JobLog();
        jobLog.setId("test-log-1");
        jobLog.setJobName("Test Job");
        jobLog.setEndTime(null);

        MonitorTarget target = new MonitorTarget(jobLog);
        try {
            target.expired();
            // If it succeeds, check that lastUpdated is set
            assertNotNull(jobLog.getLastUpdated());
        } catch (Exception e) {

				</dependencies>
				<configuration>
					<target>
						<ant antfile="${basedir}/dbflute.xml" target="download.dbflute" />
						<ant antfile="${basedir}/module.xml" target="install.modules">
							<property name="with.fess" value="true" />
							<property name="opensearch.version" value="${opensearch.version}" />
						</ant>
						<ant antfile="${basedir}/plugin.xml" target="install.plugins">

  $(document).on("click touchend", function(e) {
    if (!$(e.target).closest("#searchOptions, [data-toggle='control-options']").length) {
      $("#searchOptions").removeClass("active");
    }
  });

  $("[data-toggle='control-options']").on("click", function(e) {
    e.preventDefault();
    var target = $(this).attr("data-target") || $(this).attr("href");
    if (target) {
      $(target).toggleClass("active");
    }
  });

        // Check if Secured annotation is present
        assertNotNull(Secured.class);

        // Check Target annotation
        Target target = Secured.class.getAnnotation(Target.class);
        assertNotNull(target);
        ElementType[] targetTypes = target.value();
        assertEquals(2, targetTypes.length);
        assertTrue(Arrays.asList(targetTypes).contains(ElementType.METHOD));

    String getSchedulerTargetName();

    default boolean isSchedulerTarget(final String target) {
        if (StringUtil.isBlank(target)) {
            return true;
        }

        final String myName = getSchedulerTargetName();

        final String[] targets = target.split(",");
        for (String name : targets) {
            name = name.trim();

        final SystemHelper systemHelper = ComponentUtil.getSystemHelper();
        final String[] targets = fessConfig.getThumbnailGeneratorTargetsAsArray();
        final List<ThumbnailQueue> list = new ArrayList<>();
        taskList.stream().filter(entity -> entity != null).forEach(task -> {
            for (final String target : targets) {
                final ThumbnailQueue entity = new ThumbnailQueue();