Method setAsyncCallback

src/IO/WriteBufferFromPocoSocket.cpp:205–211

}

void WriteBufferFromPocoSocket::setAsyncCallback(AsyncCallback async_callback_)
{
    if (async_callback_ && !socket.impl()->supportsExternalPolling())
        throw Exception(ErrorCodes::LOGICAL_ERROR,
            "Cannot set an async callback on a socket that does not support external polling");
    async_callback = std::move(async_callback_);
}

}