* <pre>
 * {@code
 * UrlQueue<?> urlQueue = CrawlingParameterUtil.getUrlQueue();
 * CrawlingParameterUtil.setUrlQueue(newUrlQueue);
 *
 * CrawlerContext context = CrawlingParameterUtil.getCrawlerContext();
 * CrawlingParameterUtil.setCrawlerContext(newContext);
 *
 * UrlQueueService<UrlQueue<?>> urlQueueService = CrawlingParameterUtil.getUrlQueueService();
 * CrawlingParameterUtil.setUrlQueueService(newUrlQueueService);
 *

        UrlQueue<?> urlQueue = createMockUrlQueue("test", "http://test.com");
        CrawlingParameterUtil.setUrlQueue(urlQueue);
        assertNotNull(CrawlingParameterUtil.getUrlQueue());

        // Set to null
        CrawlingParameterUtil.setUrlQueue(null);

        // Should be null now
        assertNull(CrawlingParameterUtil.getUrlQueue());
    }

    public void test_crawlerContext_setAndGet() {

        // Number of concurrent tasks
        final int numTasks = 100;
        // Interval in milliseconds
        final Long waittime = 100L;

        CrawlingParameterUtil.setUrlQueue(new UrlQueueImpl());
        final UrlQueue q = CrawlingParameterUtil.getUrlQueue();
        for (int i = 0; i < numTasks; i++) {
            q.setUrl("http://example.com");
        }

        log(logHelper, LogType.START_THREAD, crawlerContext);
        int threadCheckCount = 0;
        // set urlQueue to thread
        CrawlingParameterUtil.setCrawlerContext(crawlerContext);
        CrawlingParameterUtil.setUrlQueueService(urlQueueService);
        CrawlingParameterUtil.setDataService(dataService);
        try {
            while (crawlerContext.getStatus() != CrawlerStatus.DONE && isContinue(threadCheckCount)) {

    protected void processResult(final UrlQueue<?> urlQueue, final ResponseData responseData, final ResultData resultData) {
        final CrawlerContext crawlerContext = CrawlingParameterUtil.getCrawlerContext();
        final UrlQueueService<UrlQueue<?>> urlQueueService = CrawlingParameterUtil.getUrlQueueService();
        if (!urlQueueService.visited(urlQueue)) {
            if (checkAccessCount(crawlerContext)) {

```

### 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

import org.codelibs.core.lang.SystemUtil;
import org.codelibs.fess.crawler.entity.UrlQueue;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;
import org.codelibs.fess.crawler.util.CrawlingParameterUtil;

import com.google.common.cache.Cache;
import com.google.common.cache.CacheBuilder;

/**
 * HostIntervalController is an implementation of {@link org.codelibs.fess.crawler.interval.IntervalController}

import org.codelibs.fess.crawler.helper.impl.MimeTypeHelperImpl;
import org.codelibs.fess.crawler.service.impl.UrlFilterServiceImpl;
import org.codelibs.fess.crawler.util.CrawlerWebServer;
import org.codelibs.fess.crawler.util.CrawlingParameterUtil;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * @author shinsuke
 *
 */
public class HcHttpClientTest extends PlainTestCase {
    public HcHttpClient httpClient;

import org.codelibs.fess.crawler.entity.AccessResult;
import org.codelibs.fess.crawler.entity.AccessResultData;
import org.codelibs.fess.crawler.entity.UrlQueue;
import org.codelibs.fess.crawler.util.CrawlingParameterUtil;
import org.codelibs.fess.crawler.util.FieldConfigs;
import org.codelibs.fess.mylasta.direction.FessConfig;
import org.codelibs.fess.util.ComponentUtil;

/**

import org.codelibs.fess.crawler.extractor.impl.TikaExtractor;
import org.codelibs.fess.crawler.serializer.DataSerializer;
import org.codelibs.fess.crawler.transformer.impl.AbstractTransformer;
import org.codelibs.fess.crawler.util.CrawlingParameterUtil;
import org.codelibs.fess.crawler.util.FieldConfigs;
import org.codelibs.fess.helper.CrawlingConfigHelper;
import org.codelibs.fess.helper.CrawlingInfoHelper;
import org.codelibs.fess.helper.DocumentHelper;