}

  data class ConnectStart(
    override val timestampNs: Long,
    override val call: Call,
    val inetSocketAddress: InetSocketAddress,
    val proxy: Proxy?,
  ) : CallEvent()

  data class ConnectEnd(
    override val timestampNs: Long,
    override val call: Call,
    val inetSocketAddress: InetSocketAddress,
    val proxy: Proxy?,
    val protocol: Protocol?,
  ) : CallEvent() {

  override fun connectEnd(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
  ) = logEvent(ConnectEnd(System.nanoTime(), call, inetSocketAddress, proxy, protocol))

  override fun connectFailed(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
    ioe: IOException,

    // Name proxy specification.
    var socketAddress = InetSocketAddress.createUnresolved("host", 1234)
    assertThat(socketAddress.socketHost).isEqualTo("host")
    socketAddress = InetSocketAddress.createUnresolved("127.0.0.1", 1234)
    assertThat(socketAddress.socketHost).isEqualTo("127.0.0.1")

    // InetAddress proxy specification.
    socketAddress = InetSocketAddress(InetAddress.getByName("localhost"), 1234)

    @Override
    public RdmaConnection createConnection(InetSocketAddress remote, InetSocketAddress local) throws IOException {
        ensureInitialized();
        return new DisniRdmaConnection(remote, local, endpointGroup);
    }

    @Override
    public RdmaConnection connect(String hostname, int port) throws IOException {
        InetSocketAddress remoteAddress = new InetSocketAddress(hostname, port);

        RdmaProvider provider = RdmaProviderFactory.selectBestProvider();

        // Use localhost for testing - should work with TCP fallback
        InetSocketAddress address = new InetSocketAddress("localhost", 12345);

        try (RdmaConnection connection = provider.createConnection(address, null)) {
            assertNotNull(connection, "Connection should not be null");

     */
    Set<RdmaCapability> getSupportedCapabilities();
    
    /**
     * Create RDMA connection to remote endpoint
     */
    RdmaConnection createConnection(InetSocketAddress remote, 
                                   InetSocketAddress local) throws IOException;
    
    /**
     * Register memory region for RDMA operations
     */
    RdmaMemoryRegion registerMemory(ByteBuffer buffer, 

  }

  override fun connectEnd(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,
  ) {
    logWithTime("connectEnd: $protocol")

    delegate.connectEnd(call, inetSocketAddress, proxy, protocol)
  }

  override fun connectFailed(
    call: Call,
    inetSocketAddress: InetSocketAddress,
    proxy: Proxy,
    protocol: Protocol?,

    }

    @Test
    public void testCreateConnection() throws Exception {
        InetSocketAddress remote = new InetSocketAddress("localhost", 445);
        InetSocketAddress local = null;

        RdmaConnection connection = provider.createConnection(remote, local);
        assertNotNull(connection, "Connection should not be null");

    val latch4 = CountDownLatch(1)
    val listener1: EventListener =
      object : EventListener() {
        override fun connectStart(
          call: Call,
          inetSocketAddress: InetSocketAddress,
          proxy: Proxy,
        ) {
          try {
            // Wait for request2 to guarantee we make 2 separate connections to the server.
            latch1.await()

     * @return new RDMA connection instance
     * @throws IOException if connection creation fails
     */
    RdmaConnection createConnection(InetSocketAddress remote, InetSocketAddress local) throws IOException;

    /**
     * Connect to a remote RDMA endpoint
     *
     * @param hostname remote hostname or IP address
     * @param port remote port number