this.logger = requireNonNull(logger);
    }

    public void debug(CharSequence content) {
        if (isDebugEnabled()) {
            logger.debug(toString(content));
        }
    }

    @Override
    public void debug(CharSequence content, Throwable error) {
        if (isDebugEnabled()) {
            logger.debug(toString(content), error);
        }
    }

    @Override

                        // document already exists
                        if (logger.isDebugEnabled()) {
                            logger.debug("{} exists.", urlQueue.getUrl(), e);
                        }
                        return;
                    }
                    throw e;
                }
                if (logger.isDebugEnabled()) {
                    logger.debug("Storing child urls: {}", resultData.getChildUrlSet());

    protected String[] supportedLanguages;

    protected LanguageDetector detector;

    protected int maxTextLength;

    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialize {}", this.getClass().getSimpleName());
        }
        final FessConfig fessConfig = ComponentUtil.getFessConfig();

        if (logger.isDebugEnabled()) {
            logger.debug("Create thumbnail task: {}", task);
        }
        return task;
    }

    @Override
    public boolean generate(final String thumbnailId, final File outputFile) {
        if (logger.isDebugEnabled()) {
            logger.debug("Generate Thumbnail: {}", thumbnailId);
        }

            }
        } catch (final ContainerNotAvailableException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("container was destroyed.");
            }
            return;
        } catch (final Exception e) {
            if (!ComponentUtil.available()) {
                if (logger.isDebugEnabled()) {
                    logger.debug("container was destroyed.");
                }

            thread.start();
            if (logger.isDebugEnabled()) {
                logger.debug("TimeoutManager started.");
            }
        }
    }

    /**
     * 処理を停止します。
     */
    public synchronized void stop() {
        if (thread != null) {
            thread.interrupt();
            thread = null;
            if (logger.isDebugEnabled()) {
                logger.debug("TimeoutManager stopped.");

    protected long maxDocumentRequestSize;

    protected int maxDocumentCacheSize;

    private IngestFactory ingestFactory = null;

    @PostConstruct
    public void init() {
        if (logger.isDebugEnabled()) {
            logger.debug("Initialize {}", this.getClass().getSimpleName());
        }
        maxDocumentRequestSize = Long.parseLong(ComponentUtil.getFessConfig().getIndexerDataMaxDocumentRequestSize());

                if (extractor == null) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("use a defautl extractor as {} by {}", extractorName, mimeType);
                    }
                    extractor = crawlerContainer.getComponent(extractorName);
                } else if (logger.isDebugEnabled()) {

            });
            if (logger.isDebugEnabled()) {
                cachedPathMappingList.forEach(e -> {
                    logger.debug("path mapping: {}: {} -> {}", e.getId(), e.getRegex(), e.getReplacement());
                });
            }
            return cachedPathMappingList.size();
        } catch (final ComponentNotFoundException e) {
            if (logger.isDebugEnabled()) {

                    // PAC Server Signature
                    if ( this.serverSignature == null ) {
                        this.serverSignature = new PacSignature(bufferData);
                        if ( log.isDebugEnabled() ) {
                            log.debug(
                                String.format("Server signature is type %d @ %d len %d", this.serverSignature.getType(), bufferOffset, bufferSize));
                        }