import org.opensearch.index.query.QueryBuilder;
import org.opensearch.index.query.QueryBuilders;

/**
 * Helper class for indexing operations in the Fess search engine.
 * This class provides functionality for sending documents to the search engine,
 * managing document lifecycle operations (create, update, delete), and handling
 * thumbnail processing during indexing.
 *

            w.write(payload, 3, out);
        }

        // Assert: verify the underlying stream was called
        verify(out, timeout(1000)).write(payload, 0, 3);

        // Stop the thread by sending n = -1
        synchronized (w) {
            w.write(new byte[0], -1, out);
        }

        w.join(2000);
        assertFalse(w.isAlive(), "WriterThread should stop after -1 sentinel");
    }

    }

    /**
     * Perform channel binding for a channel
     *
     * @param channel channel to bind
     * @throws IOException if binding fails
     */
    public void performChannelBinding(ChannelInfo channel) throws IOException {
        // MS-SMB2 3.2.4.1.6: Alternative Channel Creation
        // Channel binding requires SMB2_SESSION_FLAG_BINDING (0x01) in session setup

        // Test duplicate unregistration
        assertFalse(mockService.unregisterWitness(regId));
    }

    @Test
    void testMockServiceNotifications() {
        // Test notification sending (just logs for mock)
        mockService.sendNotification(WitnessEventType.RESOURCE_CHANGE, "TestResource");

        // Register a witness first

/**
 * This class simplifies communication for protocols that support
 * multiplexing requests. It encapsulates a stream and some protocol
 * knowledge (provided by a concrete subclass) so that connecting,
 * disconnecting, sending, and receiving can be syncronized
 * properly. Apparatus is provided to send and receive requests
 * concurrently.
 */

public abstract class Transport implements Runnable {

    /**

        });
    }

    /**
     * Sends a test mail using the provided notification settings.
     *
     * @param form the mail form containing notification settings
     * @return HTML response after sending test mail
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse sendmail(final MailForm form) {
        validate(form, messages -> {}, () -> asHtml(path_AdminGeneral_AdminGeneralJsp));

        if (!connected) {
            throw new IOException("Witness client not connected");
        }

        try {
            log.debug("Sending witness heartbeat for: {}", request.getRegistrationId());

            // Create and populate the RPC message
            WitnessHeartbeatMessage message = new WitnessHeartbeatMessage();

            final SearchRequestParams params, final OptionalThing<FessUserBean> userBean) {
        if (logger.isDebugEnabled()) {
            logger.debug("Sending query to searchers: query={}", query);
        }
        final int pageSize = params.getPageSize();
        final int startPosition = params.getStartPosition();
        if (startPosition * 2 >= windowSize) {

     * @return maximum channels per session
     */
    int getMaxChannels();

    /**
     * Channel binding policy
     *
     * Property {@code jcifs.smb.client.channelBindingPolicy} (String, default "preferred")
     * Values: "disabled", "preferred", "required"
     *
     * @return channel binding policy
     */
    int getChannelBindingPolicy();

    /**
     * Load balancing strategy for multi-channel

     * @param command the command to send to the process
     * @throws JobNotFoundException if no process is found for the given session ID
     * @throws JobProcessingException if there's an error sending the command
     */
    public void sendCommand(final String sessionId, final String command) {
        final Process process;
        synchronized (this) {