}

    /**
     * Gets the log notification helper component.
     * @return The log notification helper.
     */
    public static LogNotificationHelper getLogNotificationHelper() {
        return getComponent(LOG_NOTIFICATION_HELPER);
    }

    /**
     * Gets the ingest factory component.
     * @return The ingest factory.
     */

        assertEquals(0, events.size());
    }

    @Test
    public void test_append_nonExcludedLogger() {
        final LogEvent event = createLogEvent(Level.ERROR, "org.codelibs.fess.helper.SystemHelper", "not excluded");
        appender.append(event);

        final List<LogNotificationEvent> events = ComponentUtil.getLogNotificationHelper().drainAll();
        assertEquals(1, events.size());

    }

    @Test
    public void test_expired_withEvents_drainsBuffer() {
        // Add events to buffer
        ComponentUtil.getLogNotificationHelper()
                .offer(new LogNotificationEvent(System.currentTimeMillis(), "ERROR", "org.test", "msg1", null));
        ComponentUtil.getLogNotificationHelper()
                .offer(new LogNotificationEvent(System.currentTimeMillis(), "WARN", "org.test", "msg2", null));

                return;
            }
        } catch (final Exception e) {
            return;
        }

        final LogNotificationHelper helper;
        try {
            helper = ComponentUtil.getLogNotificationHelper();
        } catch (final Exception e) {
            return;
        }

        final List<LogNotificationEvent> events = helper.drainAll();
        if (events.isEmpty()) {
            return;
        }

                return;
            }
        } catch (final Exception e) {
            return;
        }

        final LogNotificationHelper helper;
        try {
            helper = ComponentUtil.getLogNotificationHelper();
        } catch (final Exception e) {
            return;
        }

        String throwableStr = null;
        final Throwable thrown = event.getThrown();
        if (thrown != null) {