@Override
            public String getIndexerDataMaxDocumentRequestSize() {
                return "1048576"; // 1MB
            }

            @Override
            public Integer getIndexerDataMaxDocumentCacheSizeAsInteger() {
                return 10000;
            }

            @Override
            public String getIndexFieldUrl() {
                return "url";
            }

        }
        maxDocumentRequestSize = Long.parseLong(ComponentUtil.getFessConfig().getIndexerDataMaxDocumentRequestSize());
        maxDocumentCacheSize = ComponentUtil.getFessConfig().getIndexerDataMaxDocumentCacheSizeAsInteger();
        if (ComponentUtil.hasIngestFactory()) {
            ingestFactory = ComponentUtil.getIngestFactory();
        }
    }

    /**

     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     * @throws NumberFormatException When the property is not integer.
     */
    Integer getIndexerDataMaxDocumentCacheSizeAsInteger();

    /**
     * Get the value for the key 'indexer.data.max.document.request.size'. <br>
     * The value is, e.g. 1048576 <br>