import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import java.util.concurrent.Future;

import org.codelibs.fess.crawler.entity.UrlQueue;
import org.codelibs.fess.crawler.entity.UrlQueueImpl;
import org.codelibs.fess.crawler.util.CrawlingParameterUtil;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * @author hayato
 *
 */

        String sessionId = "session123";
        UrlQueueImpl<Long> urlQueue = new UrlQueueImpl<>();
        urlQueue.setSessionId(sessionId);
        urlQueue.setUrl("https://example.com");

        Queue<UrlQueueImpl<Long>> mockQueue = new LinkedList<>();
        when(dataHelper.getUrlQueueList(sessionId)).thenReturn(mockQueue);

        // Execute
        service.insert(urlQueue);

        // Verify

	</component>

	<!-- Entity -->
	<component name="accessResult" class="org.codelibs.fess.crawler.entity.AccessResultImpl" instance="prototype" >
	</component>
	<component name="urlQueue" class="org.codelibs.fess.crawler.entity.UrlQueueImpl" instance="prototype" >
	</component>

	<!-- Service -->

        String urlEncoding;
        final UrlQueue<?> urlQueue = CrawlingParameterUtil.getUrlQueue();
        if (urlQueue != null && urlQueue.getEncoding() != null) {
            urlEncoding = urlQueue.getEncoding();
        } else {
            urlEncoding = responseData.getCharSet();
        }

        // cid

        assertEquals(weight, queue.getWeight(), 0.001f);
    }

    public void test_interfaceImplementation() {
        // Test that UrlQueueImpl implements UrlQueue
        UrlQueueImpl<Long> queue = new UrlQueueImpl<>();
        assertTrue(queue instanceof UrlQueue);
    }

    public void test_genericTypeFlexibility() {
        // Test with different generic types

import java.io.IOException;

import org.opensearch.core.xcontent.ToXContent;
import org.opensearch.core.xcontent.XContentBuilder;

/**
 * OpenSearchUrlQueue is an implementation of {@link UrlQueue} for OpenSearch.
 */
public class OpenSearchUrlQueue extends UrlQueueImpl<String> implements ToXContent {

    /**
     * Creates a new instance of OpenSearchUrlQueue.
     */
    public OpenSearchUrlQueue() {

	</component>

	<!-- Entity -->
	<component name="accessResult"
		class="org.codelibs.fess.crawler.entity.OpenSearchAccessResult" instance="prototype">
	</component>
	<component name="urlQueue"
		class="org.codelibs.fess.crawler.entity.OpenSearchUrlQueue" instance="prototype">
	</component>

	<!-- Service -->
	<component name="urlQueueService"

        final Map<String, String> xpathConfigMap = crawlingConfig.getConfigParameterMap(ConfigName.XPATH);

        String urlEncoding;
        final UrlQueue<?> urlQueue = CrawlingParameterUtil.getUrlQueue();
        if (urlQueue != null && urlQueue.getEncoding() != null) {
            urlEncoding = urlQueue.getEncoding();
        } else {
            urlEncoding = responseData.getCharSet();
        }

        // cid

import org.codelibs.fess.crawler.client.CrawlerClientFactory;
import org.codelibs.fess.crawler.container.CrawlerContainer;
import org.codelibs.fess.crawler.entity.AccessResult;
import org.codelibs.fess.crawler.entity.UrlQueue;
import org.codelibs.fess.crawler.filter.UrlFilter;
import org.codelibs.fess.crawler.interval.IntervalController;
import org.codelibs.fess.crawler.rule.RuleManager;
import org.codelibs.fess.crawler.service.DataService;

  └─ UnsupportedExtractException
```

### Thread-Local Storage

```java
// Set (in CrawlerThread)
CrawlingParameterUtil.setCrawlerContext(context);
CrawlingParameterUtil.setUrlQueue(urlQueue);

// Get (anywhere in same thread)
CrawlerContext ctx = CrawlingParameterUtil.getCrawlerContext();

// Clear (ALWAYS in finally)
CrawlingParameterUtil.clearAll();
```

## Log Message Guidelines