// Verify that SystemUtil extends org.codelibs.core.lang.SystemUtil
        Class<?> superClass = SystemUtil.class.getSuperclass();
        assertEquals("Should extend org.codelibs.core.lang.SystemUtil", "org.codelibs.core.lang.SystemUtil", superClass.getName());
    }

    public void test_constants_reference() {
        // Test that the constant used is accessible and has expected value

import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.stream.Collectors;

import org.codelibs.core.io.CloseableUtil;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.lang.SystemUtil;
import org.codelibs.fess.crawler.builder.RequestDataBuilder;
import org.codelibs.fess.crawler.client.CrawlerClient;
import org.codelibs.fess.crawler.client.CrawlerClientFactory;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.client;

import java.util.List;
import java.util.Map;

import org.codelibs.core.lang.SystemUtil;
import org.codelibs.fess.crawler.Constants;
import org.codelibs.fess.crawler.builder.RequestDataBuilder;
import org.codelibs.fess.crawler.client.FaultTolerantClient.RequestListener;

import java.util.Set;
import java.util.stream.Collectors;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.core.lang.SystemUtil;
import org.codelibs.fess.crawler.Constants;
import org.codelibs.fess.crawler.CrawlerContext;
import org.codelibs.fess.crawler.container.CrawlerContainer;
import org.codelibs.fess.crawler.entity.AccessResult;

import org.codelibs.fess.opensearch.client.SearchEngineClient;
import org.codelibs.fess.timer.SystemMonitorTarget;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.SystemUtil;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.Option;
import org.lastaflute.di.core.external.GenericExternalContext;

import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;
import org.codelibs.fess.util.JobProcess;
import org.codelibs.fess.util.ResourceUtil;
import org.codelibs.fess.util.SystemUtil;

import jakarta.servlet.ServletContext;

/**
 * This job is responsible for executing the suggest creator process.
 * It builds and runs a command-line process to generate suggest data,

import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;
import org.codelibs.fess.util.JobProcess;
import org.codelibs.fess.util.ResourceUtil;
import org.codelibs.fess.util.SystemUtil;

import jakarta.servlet.ServletContext;

/**
 * Job class for generating thumbnails for documents in the search engine.
 * This job executes the ThumbnailGenerator process as a separate JVM process

import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.InputStreamThread;
import org.codelibs.fess.util.JobProcess;
import org.codelibs.fess.util.ResourceUtil;
import org.codelibs.fess.util.SystemUtil;

import jakarta.servlet.ServletContext;

/**
 * CrawlJob is responsible for executing the crawling process in Fess.
 * This job launches a separate crawler process that can crawl web sites, file systems,

import org.codelibs.fess.timer.HotThreadMonitorTarget;
import org.codelibs.fess.timer.SystemMonitorTarget;
import org.codelibs.fess.util.ComponentUtil;
import org.codelibs.fess.util.SystemUtil;
import org.codelibs.fess.util.ThreadDumpUtil;
import org.dbflute.mail.send.hook.SMailCallbackContext;
import org.kohsuke.args4j.CmdLineException;
import org.kohsuke.args4j.CmdLineParser;
import org.kohsuke.args4j.Option;

     * then falls back to the URL configured in FessConfig.
     *
     * @return the HTTP URL for the OpenSearch server
     */
    public static String getFesenHttpUrl() {
        final String url = SystemUtil.getSearchEngineHttpAddress();
        if (url != null) {
            return url;
        }
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return fessConfig.getFesenHttpUrl();
    }