String originalValue = System.getProperty(FesenClient.HTTP_ADDRESS);
        try {
            System.setProperty(FesenClient.HTTP_ADDRESS, "http://localhost:9200");
            assertEquals("http://localhost:9200", System.getProperty(FesenClient.HTTP_ADDRESS));
        } finally {
            if (originalValue != null) {
                System.setProperty(FesenClient.HTTP_ADDRESS, originalValue);
            } else {

                return fesenUrl;
            }
        });

        // Set system property to ensure ResourceUtil.getFesenHttpUrl() works
        System.setProperty("fess.search_engine.http_address", fesenUrl);
    }

    private NodeManager getNodeManager(CurlHelper curlHelper) {
        try {
            Field field = CurlHelper.class.getDeclaredField("nodeManager");
            field.setAccessible(true);

            } catch (final Exception e) {
                // ignore
            }
        }

        final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
        if (StringUtil.isNotBlank(httpAddress)) {
            System.setProperty(FesenClient.HTTP_ADDRESS, httpAddress);
        }

        TimeoutTask systemMonitorTask = null;
        int exitCode;
        try {

 *
 * @author shinsuke
 *
 */
public class FesenClient implements Client {
    /**
     * HTTP address for OpenSearch.
     */
    public static final String HTTP_ADDRESS = "crawler.opensearch.http_address";

    /**
     * Target indices for OpenSearch.
     */
    public static final String TARGET_INDICES = "crawler.opensearch.target_indices";

    /**
     * Logger instance.

    }

    public void test_constants_reference() {
        // Test that the constant used is accessible and has expected value
        assertEquals("fess.search_engine.http_address", Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);
    }

    public void test_static_method_signature() {
        // Verify method signature is correct
        try {

                // ignore
            }
        }

        initializeProbes();

        final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
        if (StringUtil.isNotBlank(httpAddress)) {
            System.setProperty(FesenClient.HTTP_ADDRESS, httpAddress);
        }

        TimeoutTask systemMonitorTask = null;
        TimeoutTask hotThreadMonitorTask = null;

    public static final String MATCHES_ALL_QUERY = "*:*";

    /** Configuration key for search engine HTTP address. */
    public static final String FESS_SEARCH_ENGINE_HTTP_ADDRESS = "fess.search_engine.http_address";

    /** Default number of results per page. */
    public static final int DEFAULT_PAGE_SIZE = 20;

    /** Default starting count for pagination. */
    public static final int DEFAULT_START_COUNT = 0;

        }
        cmdList.add(buf.toString());

        if (useLocalFesen) {
            final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
            if (StringUtil.isNotBlank(httpAddress)) {
                cmdList.add("-D" + Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS + "=" + httpAddress);
            }
        }

        final String systemLastaEnv = System.getProperty("lasta.env");

        }
        cmdList.add(buf.toString());

        if (useLocalFesen) {
            final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
            if (StringUtil.isNotBlank(httpAddress)) {
                cmdList.add("-D" + Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS + "=" + httpAddress);
            }
        }

        final String systemLastaEnv = System.getProperty("lasta.env");

        }
        cmdList.add(buf.toString());

        if (useLocalFesen) {
            final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
            if (StringUtil.isNotBlank(httpAddress)) {
                cmdList.add("-D" + Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS + "=" + httpAddress);
            }
        }

        final String systemLastaEnv = System.getProperty("lasta.env");