pendingOperations.add(operation);
    }

    /**
     * Remove a pending operation
     *
     * @param operation operation to remove
     * @return true if operation was removed
     */
    public boolean removePendingOperation(CommonServerMessageBlock operation) {
        return pendingOperations.remove(operation);
    }

    /**
     * Clear all pending operations
     */

        return channels.values().stream().filter(c -> c.getTransport() == transport).findFirst().orElse(null);
    }

    /**
     * Remove a channel
     *
     * @param channel channel to remove
     */
    public void removeChannel(ChannelInfo channel) {
        channels.remove(channel.getChannelId());
        try {
            if (channel.getTransport() != null) {
                channel.getTransport().close();

    /**
     * Sends a request to the remote endpoint.
     *
     * @param request the request to send
     * @throws IOException if an I/O error occurs
     */
    protected abstract void doSend(Request request) throws IOException;

    /**
     * Receives a response from the remote endpoint.
     *
     * @param response the response object to populate

    protected int maxReadWriteSize;

    /**
     * Create new RDMA connection
     *
     * @param remote remote socket address
     * @param local local socket address, may be null
     */
    public RdmaConnection(InetSocketAddress remote, InetSocketAddress local) {
        this.remoteAddress = remote;
        this.localAddress = local;
        this.sendCredits = new AtomicInteger(0);

        this.transform = transform;
    }

    /**
     * Get remote memory key
     *
     * @return remote memory key (token)
     */
    public int getRemoteKey() {
        return transform.getToken();
    }

    /**
     * Get remote memory address
     *
     * @return remote memory address (offset)
     */
    public long getAddress() {
        return transform.getOffset();

    /**
     * Create RDMA connection to remote endpoint
     *
     * @param remote remote socket address
     * @param local local socket address, may be null for auto-binding
     * @return new RDMA connection instance
     * @throws IOException if connection creation fails
     */
    RdmaConnection createConnection(InetSocketAddress remote, InetSocketAddress local) throws IOException;

    /**

        }
    }

    /**
     * Performs RDMA read operation.
     *
     * @param buffer the buffer to read into
     * @param remoteAddress remote memory address
     * @param remoteKey remote access key
     * @param length number of bytes to read
     * @return number of bytes read
     * @throws IOException if operation fails
     */

    private Socket socket;

    /**
     * Create new TCP RDMA connection
     *
     * @param remote remote socket address
     * @param local local socket address, may be null
     */
    public TcpRdmaConnection(InetSocketAddress remote, InetSocketAddress local) {
        super(remote, local);
    }

    @Override
    public void connect() throws IOException {
        try {

    /**
     * Create new DiSNI RDMA connection
     *
     * @param remote remote socket address
     * @param local local socket address
     * @param group DiSNI endpoint group
     * @throws IOException if connection creation fails
     */
    public DisniRdmaConnection(InetSocketAddress remote, InetSocketAddress local, Object group) throws IOException {
        super(remote, local);
        this.group = group;

    /** Local key for accessing this memory region */
    protected final int localKey;
    /** Remote key for remote RDMA access */
    protected final int remoteKey;
    /** Virtual address of the memory region */
    protected final long address;
    /** Flag indicating if the memory region is still valid */
    protected volatile boolean valid;

    /**
     * Create new RDMA memory region