* Volatile to ensure visibility across threads.
     */
    protected volatile boolean alive = true;

    /**
     * Default constructor.
     */
    public AbstractDataStore() {
        // nothing
    }

    /**
     * Register this data store.
     */
    public void register() {
        ComponentUtil.getDataStoreFactory().add(getName(), this);
    }

    /**

        // Test that default level is 1
        assertEquals(1, LogStream.level);
    }

    @Test
    void testLevelValuesDocumentation() {
        // Test various level values as documented
        // 0 - nothing
        LogStream.setLevel(0);
        assertEquals(0, LogStream.level);

        // 1 - critical [default]
        LogStream.setLevel(1);
        assertEquals(1, LogStream.level);

    private Map<String, Object> params;
    private List<String> activeFeatures;

    /**
     * Constructs a new stored LTR query builder.
     */
    public StoredLtrQueryBuilder() {
        // do nothing
    }

    @Override
    public String getWriteableName() {
        return NAME;
    }

    @Override
    protected void doWriteTo(final StreamOutput out) throws IOException {

            assertEquals(0, values.length);
        }
        try (final ResponseData responseData = gcsClient.doGet("")) {
            fail();
        } catch (CrawlerSystemException e) {
            // nothing
        }
    }

    public void test_doHead() throws Exception {
        try (final ResponseData responseData = gcsClient.doHead("gcs://fess/file1.txt")) {

    public static final File tmpDir = new File(System.getProperty("java.io.tmpdir"));

    /**
     * Protected constructor to prevent direct instantiation but allow inheritance.
     */
    protected Curl() {
        // nothing
    }

    /**
     * Creates a new CurlRequest with the HTTP GET method for the specified URL.
     *
     * @param url the URL to send the GET request to

    /** The field config prefix. */
    protected static final String FIELD_PREFIX = "field.config.";

    /**
     * Protected constructor.
     */
    protected ParameterUtil() {
        // nothing
    }

    /**
     * Parses parameter string into a map.
     *
     * @param value the parameter string
     * @return the parameter map
     */

    }

    @Test
    void testClose_AlreadyClosed() throws IOException {
        // Test case: close() when already closed, should do nothing
        String server = "testServer";
        int access = 123;

        // Setup for successful constructor
        doNothing().when(mockHandle).sendrecv(any(MsrpcSamrConnect4.class));

    }

    @Test
    @DisplayName("ensureDFSResolved(): no exception when underlying call succeeds")
    void ensureDFSResolved_success() throws Exception {
        // Arrange: default mock does nothing

        // Act: call method under test
        handle.ensureDFSResolved();

        // Assert: interaction happened and did not throw
        verify(handle, times(1)).ensureDFSResolved();

    /**
     * Protected constructor to prevent instantiation of this utility class.
     * This class is designed to be used statically.
     */
    protected ResourceUtil() {
        // nothing
    }

    /**
     * Gets the HTTP URL for the OpenSearch (Fesen) server.
     * First checks for a system-configured search engine address,
     * then falls back to the URL configured in FessConfig.
     *

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