public Integer depth;

    /**
     * Maximum number of pages/documents to access during crawling.
     */
    @Min(value = 0)
    @Max(value = 9223372036854775807L)
    @ValidateTypeFailure
    public Long maxAccessCount;

    public Integer depth;

    /** The maximum number of documents to access during crawling (0 means unlimited). */
    @Min(value = 0)
    @Max(value = 9223372036854775807L)
    @ValidateTypeFailure
    public Long maxAccessCount;

    /** The number of threads to use for crawling (required, 1 to 2147483647). */
    @Required
    @Min(value = 1)
    @Max(value = 2147483647)
    @ValidateTypeFailure
    public Integer numOfThread;

- **Crawler** (`Crawler.java`): Main orchestrator - `execute()`, `addUrl()`, `cleanup()`, `stop()`
- **CrawlerContext** (`CrawlerContext.java`): Execution context - `sessionId`, `status`, `accessCount`, `numOfThread`, `maxDepth`, `maxAccessCount`
- **CrawlerThread** (`CrawlerThread.java`): Worker thread - Poll URL → Validate → Execute → Process → Queue children

### HTTP Client Architecture

```
SwitchableHttpClient (extends FaultTolerantClient)

        }

        boolean isContinue = false;
        if (tcCount < crawlerContext.maxThreadCheckCount) {
            final long maxAccessCount = crawlerContext.getMaxAccessCount();
            if (maxAccessCount > 0 && crawlerContext.getAccessCount() >= maxAccessCount) {
                return false;
            }
            isContinue = true;
        }

            result.setIntervalTime(DfTypeUtil.toInteger(source.get("intervalTime")));
            result.setMaxAccessCount(DfTypeUtil.toLong(source.get("maxAccessCount")));
            result.setName(DfTypeUtil.toString(source.get("name")));
            result.setNumOfThread(DfTypeUtil.toInteger(source.get("numOfThread")));

        }

        public void columnIntervalTime() {
            doColumn("intervalTime");
        }

        public void columnMaxAccessCount() {
            doColumn("maxAccessCount");
        }

        public void columnName() {
            doColumn("name");
        }

        public void columnNumOfThread() {
            doColumn("numOfThread");
        }

        assertEquals("{labels.includedDocPaths}", FessLabels.LABELS_INCLUDED_DOC_PATHS);
        assertEquals("{labels.includedDocUrls}", FessLabels.LABELS_INCLUDED_DOC_URLS);
        assertEquals("{labels.maxAccessCount}", FessLabels.LABELS_MAX_ACCESS_COUNT);
        assertEquals("{labels.name}", FessLabels.LABELS_NAME);
        assertEquals("{labels.numOfThread}", FessLabels.LABELS_NUM_OF_THREAD);

    /**
     * The maximum number of URLs to access during crawling.
     */
    @Min(value = 0)
    @Max(value = 9223372036854775807L)
    @ValidateTypeFailure
    public Long maxAccessCount;

    /**
     * The user agent string to use during crawling.
     */
    @Required
    @Size(max = 200)
    public String userAgent;

    /**
     * The number of crawler threads to use.

            result.setIntervalTime(DfTypeUtil.toInteger(source.get("intervalTime")));
            result.setMaxAccessCount(DfTypeUtil.toLong(source.get("maxAccessCount")));
            result.setName(DfTypeUtil.toString(source.get("name")));
            result.setNumOfThread(DfTypeUtil.toInteger(source.get("numOfThread")));
            result.setPaths(DfTypeUtil.toString(source.get("paths")));

curl -X POST "http://localhost:8080/api/admin/webconfig" \
  -H "Content-Type: application/json" \
  -u admin:admin \
  -d '{
    "name": "Example Site",
    "urls": "http://example.com/",
    "depth": 3,
    "maxAccessCount": 1000,
    "userAgent": "Fess Crawler"
  }'
```

### 3. Command-Line Import

**Using curl with bulk files**:

```bash
# Import GSA configuration