*
     * @param error
     */
    void debug(Throwable error);

    /**
     * @return true if the <b>info</b> error level is enabled
     */
    boolean isInfoEnabled();

    /**
     * Send a message to the user in the <b>info</b> error level.
     *
     * @param content
     */
    void info(CharSequence content);

    /**

            spec.args("-f", getSignatureFile().getAbsolutePath(), "-d", getJarExpandDir(), "--allowmissingclasses");
            spec.setErrorOutput(errorOut);
            if (getLogger().isInfoEnabled() == false) {
                spec.setStandardOutput(new NullOutputStream());
            }
            spec.setIgnoreExitValue(true);
        });

    public void cleanup(final String sessionId) {
        if (logger.isInfoEnabled()) {
            logger.info("Starting crawler cleanup: sessionId={}", sessionId);
        }
        try {
            // TODO transaction?
            urlQueueService.delete(sessionId);
            dataService.delete(sessionId);
            urlFilter.clear();
            if (logger.isInfoEnabled()) {

    }

    @Override
    public void projectDiscoveryStarted(ExecutionEvent event) {
        if (logger.isInfoEnabled()) {
            init();
            logger.info("Scanning for projects...");
        }
    }

    @Override
    public void sessionStarted(ExecutionEvent event) {
        if (logger.isInfoEnabled() && event.getSession().getProjects().size() > 1) {
            init();
            infoLine('-');

        } else {
            fileConfigList = Collections.emptyList();
        }

        if (webConfigList.isEmpty() && fileConfigList.isEmpty()) {
            // nothing
            if (logger.isInfoEnabled()) {
                logger.info("No crawling target urls.");
            }
            return;
        }

        doCrawl(sessionId, webConfigList, fileConfigList);
    }

    /**

            } else if (scheduledJob.isLoggingEnabled() && logger.isInfoEnabled()) {
                logger.info("Starting job: id={}", id);
            }

            final Object ret = jobExecutor.execute(Constants.DEFAULT_SCRIPT, script);
            if (ret == null) {
                if (scheduledJob.isLoggingEnabled() && logger.isInfoEnabled()) {
                    logger.info("Finished job: id={}", id);
                }

     * Deletes all suggest items.
     *
     * @param index The index name
     * @return The SuggestDeleteResponse
     */
    public SuggestDeleteResponse deleteAll(final String index) {
        if (logger.isInfoEnabled()) {
            logger.info("Deleting all suggest items: index={}", index);
        }
        return deleteByQuery(index, QueryBuilders.matchAllQuery());
    }

    /**

    }

    @Override
    public void projectDiscoveryStarted(ExecutionEvent event) {
        if (logger.isInfoEnabled()) {
            init();
            logger.info("Scanning for projects...");
        }
    }

    @Override
    public void sessionStarted(ExecutionEvent event) {
        if (logger.isInfoEnabled() && event.getSession().getProjects().size() > 1) {
            init();
            infoLine('-');

            CopyUtil.copy(in, out);
            asyncImport(fileName, tempFile);

            if (logger.isInfoEnabled()) {
                logger.info("Backup file uploaded successfully and queued for import: fileName={}, tempFile={}", fileName,
                        tempFile.getAbsolutePath());
            }

        if (HC4_CLIENT.equalsIgnoreCase(clientType)) {
            useHc5 = false;
            if (logger.isInfoEnabled()) {
                logger.info("Using HC4 HTTP client (Apache HttpComponents 4.x)");
            }
        } else {
            useHc5 = true;
            if (logger.isInfoEnabled()) {
                logger.info("Using HC5 HTTP client (Apache HttpComponents 5.x)");
            }
        }
    }