// keys, so we need to use this technique to merge the
// keys.
func sanitizePolicy(r io.Reader) (io.Reader, error) {
	var buf bytes.Buffer
	e := json.NewEncoder(&buf)
	d := jstream.NewDecoder(r, 0).ObjectAsKVS().MaxDepth(10)
	sset := set.NewStringSet()
	for mv := range d.Stream() {
		if mv.ValueType == jstream.Object {
			// This is a JSON object type (that preserves key order)
			kvs, ok := mv.Value.(jstream.KVS)
			if ok {

```java
String sessionId                // Format: yyyyMMddHHmmssSSS
volatile CrawlerStatus status   // DONE, RUNNING
AtomicLong accessCount          // Thread-safe counter
int numOfThread = 10            // Crawler threads
int maxDepth = -1               // Max depth (-1 = unlimited)
long maxAccessCount = 0         // Max URLs (0 = unlimited)
```

### CrawlerThread (`CrawlerThread.java`)

Worker thread for crawling.

        crawlerContext.setMaxThreadCheckCount(Integer.MAX_VALUE);
        assertEquals(Integer.MAX_VALUE, crawlerContext.getMaxThreadCheckCount());
    }

    /**
     * Test maxDepth getter and setter
     */
    public void test_maxDepth() {
        assertEquals(-1, crawlerContext.getMaxDepth());

        crawlerContext.setMaxDepth(5);
        assertEquals(5, crawlerContext.getMaxDepth());

	<component name="filenameExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.FilenameExtractor" />
	<component name="jsonExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.JsonExtractor">
		<property name="maxDepth">10</property>
		<property name="extractMetadata">true</property>
	</component>
	<component name="csvExtractor"
		class="org.codelibs.fess.crawler.extractor.impl.CsvExtractor">
		<property name="hasHeader">true</property>

"firingIndex","fire","once","stopOnFalse","remove","disable","lock","fireWith","Deferred","func","tuples","state","always","deferred","catch","pipe","fns","newDefer","tuple","returned","progress","notify","onFulfilled","onRejected","onProgress","maxDepth","depth","handler","special","that","mightThrow","TypeError","notifyWith","resolveWith","process","exceptionHook","rejectWith","getErrorHook","getStackHook","setTimeout","stateString","when","singleValue","remaining","resolveContexts","resolveVa...