public static final String URL = "url";

    /**
     * Field name for parent URL.
     */
    public static final String PARENT_URL = "parentUrl";

    /**
     * Field name for depth.
     */
    public static final String DEPTH = "depth";

    /**
     * Field name for last modified timestamp.
     */
    public static final String LAST_MODIFIED = "lastModified";

    /**
     * Field name for creation time.

     */
    @Override
    public Integer getDepth() {
        return depth;
    }

    /*
     * (non-Javadoc)
     *
     * @see org.codelibs.fess.crawler.entity.UrlQueue#setDepth(java.lang.Integer)
     */
    @Override
    public void setDepth(final Integer depth) {
        this.depth = depth;
    }

    /*
     * (non-Javadoc)
     *

    /**
     * Retrieves the depth of the URL in the queue.
     *
     * @return the depth of the URL as an Integer.
     */
    Integer getDepth();

    /**
     * Sets the depth of the URL in the queue.
     *
     * @param depth the depth to set, represented as an Integer.
     */
    void setDepth(Integer depth);

    /**

        this.maxThreadCheckCount = maxThreadCheckCount;
    }

    /**
     * Returns the maximum depth.
     * @return The maximum depth.
     */
    public int getMaxDepth() {
        return maxDepth;
    }

    /**
     * Sets the maximum depth.
     * @param maxDepth The maximum depth.
     */
    public void setMaxDepth(final int maxDepth) {
        this.maxDepth = maxDepth;
    }

                }
                final int depth = urlQueue.getDepth() == null ? 1 : urlQueue.getDepth() + 1;
                if (crawlerContext.getMaxDepth() < 0 || depth <= crawlerContext.getMaxDepth()) {
                    // add and filter urls
                    storeChildUrls(crawlerContext, resultData.getChildUrlSet(), urlQueue.getUrl(), depth, resultData.getEncoding());
                }

{
    "properties": {
      "depth": {
        "type": "integer"
      },
      "parentUrl": {
        "type": "keyword"
      },
      "method": {
        "type": "keyword"
      },
      "weight": {
        "type": "float"
      },
      "createTime": {
        "type": "long"
      },
      "lastModified": {
        "type": "long"
      },
      "sessionId": {
        "type": "keyword"
      },

     * @param childUrlList The set of child URLs to store.
     * @param url The parent URL.
     * @param depth The depth of the child URLs.
     */
    protected void storeChildUrls(final Set<RequestData> childUrlList, final String url, final int depth) {
        if (crawlerContext.getMaxDepth() >= 0 && depth > crawlerContext.getMaxDepth()) {
            return;
        }

        // add url and filter

```java
// Set maximum number of URLs to crawl
crawler.crawlerContext.setMaxAccessCount(1000);

// Set number of crawler threads
crawler.crawlerContext.setNumOfThread(10);

// Set maximum crawl depth
crawler.crawlerContext.setMaxDepth(3);

// Set request interval (politeness)
crawler.crawlerContext.setDefaultIntervalTime(1000); // 1 second
```

### URL Filtering

```java
// Include patterns

     */
    public void setMaxThreadCheckCount(final int maxThreadCheckCount) {
        crawlerContext.maxThreadCheckCount = maxThreadCheckCount;
    }

    /**
     * Sets the maximum depth.
     * @param maxDepth The maximum depth.
     */
    public void setMaxDepth(final int maxDepth) {
        crawlerContext.maxDepth = maxDepth;
    }

    /**
     * Sets the maximum access count.