<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class="">Hi Rakesh,<div class=""><br class=""></div><div class="">I would like to make 2 comments about your code:<br class=""><div class=""><br class=""></div><div class="">1) m_forwarder is already a reference to an object of type Forwarder, so you tried to get a reference out of a reference.</div><div class=""><br class=""></div><div class="">2) The m_cs attribute is declared as a private member of the Forwarder class.</div><div class=""><br class=""></div><div class="">Please let me know if you have any questions.</div><div class=""><br class=""></div><div class="">Thank you,</div><div class=""><br class=""><div class="">
<div class=""><div class=""><div class=""><span class="" style="float: none; display: inline !important;">Spyridon (Spyros) Mastorakis</span><br class=""><span class="" style="float: none; display: inline !important;">Personal Website: </span><a href="http://cs.ucla.edu/~mastorakis/" class="">http://cs.ucla.edu/~mastorakis/</a><br class=""><span class="" style="float: none; display: inline !important;">Internet Research Laboratory</span><br class=""><span class="" style="float: none; display: inline !important;">Computer Science Department</span><br class=""><span class="" style="float: none; display: inline !important;">UCLA</span></div></div></div>
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<br class=""><div><blockquote type="cite" class=""><div class="">On Jul 9, 2017, at 10:30 AM, Rakesh Ranjan Jha <<a href="mailto:rakeshranjan.jha@gmail.com" class="">rakeshranjan.jha@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" class="">Hi,<div class=""><br class=""></div><div class="">I'm trying to spontaneously inject a cached data (based on a previously unfulfilled interest present in PIT and so I have an interest handle to fetch data) from content store.</div><div class=""><br class=""></div><div class="">However, I'm facing some issues:</div><div class=""><br class=""></div><div class="">1) Derived strategy doesn't seem to have any handle to fowarder although base strategy has a handle and is friend to forwarder to access pipelines. </div><div class="">In order to workaround this I added my strategy also as a friend and gave it a reference to forwarder, similar to base strategy. Is there a better way to access pipeline from strategy?</div><div class=""><br class=""></div><div class="">2) To access data from CS and feed it to outgoing data pipeline, I follow similar mechanism as done on receiving valid interest from forwarder:</div><div class="">//fowarder.cpp</div><div class=""><div class=""> if (m_csFromNdnSim == nullptr) {</div><div class=""> m_cs.find(interest,</div><div class=""> bind(&Forwarder::onContentStoreHit, this, ref(inFace), pitEntry, _1, _2),</div><div class=""> bind(&Forwarder::onContentStoreMiss, this, ref(inFace), pitEntry, _1));</div><div class=""> }</div></div><div class=""><br class=""></div><div class="">//myStrategy.cpp</div><div class=""> if (m_forwarder.m_csFromNdnSim == nullptr) {</div><div class=""> /* m_forwarder is a reference to forwarder */ </div><div class=""><div class=""><span style="white-space:pre" class=""> </span>m_forwarder.m_cs.find(pe->getInterest(),</div><div class=""> bind(&Forwarder::onContentStoreHit, &m_forwarder, ref(face), pe, _1, _2),</div><div class=""><span style="white-space:pre" class=""> </span> bind(&Forwarder::onContentStoreMiss, &m_forwarder, ref(face), pe, _1));</div><div class=""> }</div></div><div class=""><br class=""></div><div class="">However this fails compilation and I get error as below:</div><div class=""><br class=""></div><div class=""><div class=""><font color="#ff0000" class="">../src/ndnSIM/NFD/daemon/fw/my_strategy.cpp: In member function ‘virtual void nfd::fw::MyStrategy::beforeSatisfyInterest(std::shared_ptr<nfd::pit::Entry>, const nfd::Face&, const ndn::Data&)’:</font></div><div class=""><font color="#ff0000" class="">../src/ndnSIM/NFD/daemon/fw/my_strategy.cpp:243:75: error: no matching function for call to ‘nfd::cs::Cs::find(const ndn::Interest&, std::_Bind_helper<false, void (nfd::Forwarder::*)(const nfd::Face&, std::shared_ptr<nfd::pit::Entry>, const ndn::Interest&, const ndn::Data&), nfd::Forwarder*, std::reference_wrapper<int>, std::shared_ptr<nfd::pit::Entry>&, const std::_Placeholder<1>&, const std::_Placeholder<2>&>::type, std::_Bind_helper<false, void (nfd::Forwarder::*)(const nfd::Face&, std::shared_ptr<nfd::pit::Entry>, const ndn::Interest&), nfd::Forwarder*, std::reference_wrapper<int>, std::shared_ptr<nfd::pit::Entry>&, const std::_Placeholder<1>&>::type)’</font></div><div class=""><font color="#ff0000" class=""> bind(&Forwarder::onContentStoreMiss, &m_forwarder, ref(face), pe, _1));</font></div><div class=""><font color="#ff0000" class=""> ^</font></div><div class=""><font color="#ff0000" class="">In file included from ../src/ndnSIM/NFD/daemon/fw/forwarder.hpp:35:0,</font></div><div class=""><font color="#ff0000" class=""> from ../src/ndnSIM/NFD/daemon/fw/strategy.hpp:29,</font></div><div class=""><font color="#ff0000" class=""> from ../src/ndnSIM/NFD/daemon/fw/my_strategy.hpp:24,</font></div><div class=""><font color="#ff0000" class=""> from ../src/ndnSIM/NFD/daemon/fw/my_strategy.cpp:21:</font></div><div class=""><font color="#ff0000" class="">../src/ndnSIM/NFD/daemon/fw/../table/cs.hpp:88:3: note: candidate: void nfd::cs::Cs::find(const ndn::Interest&, const HitCallback&, const MissCallback&) const</font></div><div class=""><font color="#ff0000" class=""> find(const Interest& interest,</font></div><div class=""><font color="#ff0000" class=""> ^</font></div><div class=""><font color="#ff0000" class="">../src/ndnSIM/NFD/daemon/fw/../table/cs.hpp:88:3: note: no known conversion for argument 2 from ‘std::_Bind_helper<false, void (nfd::Forwarder::*)(const nfd::Face&, std::shared_ptr<nfd::pit::Entry>, const ndn::Interest&, const ndn::Data&), nfd::Forwarder*, std::reference_wrapper<int>, std::shared_ptr<nfd::pit::Entry>&, const std::_Placeholder<1>&, const std::_Placeholder<2>&>::type {aka std::_Bind<std::_Mem_fn<void (nfd::Forwarder::*)(const nfd::Face&, std::shared_ptr<nfd::pit::Entry>, const ndn::Interest&, const ndn::Data&)>(nfd::Forwarder*, std::reference_wrapper<int>, std::shared_ptr<nfd::pit::Entry>, std::_Placeholder<1>, std::_Placeholder<2>)>}’ to ‘const HitCallback& {aka const std::function<void(const ndn::Interest&, const ndn::Data&)>&}’</font></div></div><div class=""><br class=""></div><div class="">Can somebody help me figure out why this fails when similar invocation from forwarder passes?</div><div class=""><br class=""></div><div class="">Thanks in advance,</div><div class="">Rakesh</div><div class=""><br class=""></div></div></div></blockquote></div><br class=""></div></div></body></html>