[ndnSIM] Data has no wire encoding (not signed)

cjb0725 at mail.ustc.edu.cn cjb0725 at mail.ustc.edu.cn
Fri Dec 15 08:14:07 PST 2017

Hi Junxiao,

Thanks for your reply.

I notice that everytime I call a set-function in Data, like setName(),   resetWire() will be called, and m_wire will be reset. When it comes to getFullName(), 

if (!m_wire.hasWire()) {
      BOOST_THROW_EXCEPTION(Error("Cannot compute full name because Data has no wire encoding (not signed)"));

m_wire.hasWire() returns false. so exception will be throwed.

I add data->wireEncode() after where I call the set-functions so that m_wire would not be empty , and it works. :)

But I still got this problem , how to obtain CS metrics when I'm using nfd::cs. For now I use 2 counters in Forwarder::onContentHit and onContentMiss, but I find the results are quite different from ndn::CsTracer's results when I'm using the old content store with the same topo, same params.


发件人:"Junxiao Shi" <shijunxiao at email.arizona.edu>
发送时间:2017-12-15 20:17:59 (星期五)
收件人: cjb0725 at mail.ustc.edu.cn
抄送: ndnsim at lists.cs.ucla.edu
主题: Re: [ndnSIM] Data has no wire encoding (not signed)

Hi cjb

NFD ContentStore expects Data::getFullName() to return a valid name with implicit digest. If your changes cannot maintain this property, it will have undefined behavior (such as crashing).
Look at the logic in Data::getFullName() and see what went wrong.

Yours, Junxiao

On Thu, Dec 14, 2017 at 04:44 <cjb0725 at mail.ustc.edu.cn> wrote:

Greetings all,
  I add two new fields into Data and modified the encode and decode function, tlv.hpp as well. if I use the old ContentStore 
it works well.But if I use the nfd::Cs
I got this error: 
libc++abi.dylib: terminating with uncaught exception of type boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<ndn::Data::Error> >: Cannot compute full name because Data has no wire encoding (not signed).
And I have another question, we can use ndn::CsTracer to obtain metrics about hits/misses, but this only works with the old ContentStore , how to obtain these metrics when I use nfd::Cs?
any help would be great.

Thanks in advance!
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cjb0725 at mail.ustc.edu.cn
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