}
        return 0;
    }

    public long deleteBySessionId(final String sessionId) {
        final SearchEngineClient searchEngineClient = ComponentUtil.getSearchEngineClient();
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        final String index = fessConfig.getIndexDocumentUpdateIndex();
        return deleteBySessionId(searchEngineClient, index, sessionId);
    }

    }

    public void addFinishedSessionId(final String sessionId) {
        synchronized (finishedSessionIdList) {
            finishedSessionIdList.add(sessionId);
        }
    }

    private void deleteBySessionId(final String sessionId) {
        try {
            urlFilterService.delete(sessionId);
        } catch (final Exception e) {
            logger.warn("Failed to delete url filters: {}", sessionId, e);
        }

                resultMap.get("query"));
        assertEquals(1, documents.size());
    }

    public void test_deleteBySessionId() {
        final Map<String, String> resultMap = new HashMap<>();
        final SearchEngineClient client = new SearchEngineClient() {
            @Override