Method onError

examples/proto_server.cpp:87–90

protected:
    void onError(int error, const std::string& category, const std::string& message) override
    {
        std::cout << "Simple protocol server caught an error with code " << error << " and category '" << category << "': " << message << std::endl;
    }

    // Protocol implementation
    size_t onSend(const void* data, size_t size) override { Multicast(data, size); return size; }