fun updateRouteDatabaseAfterSuccess(route: Route)

  fun connectStart(route: Route)

  fun secureConnectStart()

  fun secureConnectEnd(handshake: Handshake?)

  fun callConnectEnd(
    route: Route,
    protocol: Protocol?,
  )

  fun connectionConnectEnd(
    connection: Connection,
    route: Route,
  )

  fun connectFailed(
    route: Route,
    protocol: Protocol?,

  }

  override fun connectStart(route: Route) {
  }

  override fun secureConnectStart() {
  }

  override fun secureConnectEnd(handshake: Handshake?) {
  }

  override fun callConnectEnd(
    route: Route,
    protocol: Protocol?,
  ) {
  }

  override fun connectionConnectEnd(
    connection: Connection,
    route: Route,
  ) {
  }

  override fun connectFailed(

    eventListener.secureConnectStart(call)
  }

  override fun secureConnectEnd(handshake: Handshake?) {
    eventListener.secureConnectEnd(call, handshake)
  }

  override fun callConnectEnd(
    route: Route,
    protocol: Protocol?,
  ) {
    eventListener.connectEnd(call, route.socketAddress, route.proxy, protocol)
  }

  override fun connectionConnectEnd(
    connection: Connection,

          connectionListener = connectionPool.connectionListener,
        )
      this.connection = connection
      connection.start()

      // Success.
      user.callConnectEnd(route, protocol)
      success = true
      return ConnectResult(plan = this)
    } catch (e: IOException) {
      user.connectFailed(route, null, e)