Face*
AsfStrategy::getBestFaceForForwarding(const fib::Entry& fibEntry, const Interest& interest,
const Face& inFace)
{
NFD_LOG_TRACE("Looking for best face for " << fibEntry.getPrefix());
typedef std::function<bool(const FaceStats&, const FaceStats&)> FaceStatsPredicate;
typedef std::set<FaceStats, FaceStatsPredicate> FaceStatsSet;
FaceStatsSet rankedFaces(
[] (const FaceStats& lhs, const FaceStats& rhs) -> bool {
// Sort by RTT and then by cost
double lhsValue = getValueForSorting(lhs);
double rhsValue = getValueForSorting(rhs);
if (lhsValue < rhsValue) {
return true;
}
else if (lhsValue == rhsValue) {
return lhs.cost < rhs.cost;
}
else {
return false;
}
});
for (const fib::NextHop& hop : fibEntry.getNextHops()) {
Face& hopFace = hop.getFace();
if (hopFace.getId() == inFace.getId() || wouldViolateScope(inFace, interest, hopFace)) {
continue;
}
FaceInfo* info = m_measurements.getFaceInfo(fibEntry, interest, hopFace);
if (info == nullptr) {
FaceStats stats = {&hopFace,
RttStats::RTT_NO_MEASUREMENT,
RttStats::RTT_NO_MEASUREMENT,
hop.getCost()};
rankedFaces.insert(stats);
}
else {
FaceStats stats = {&hopFace, info->getRtt(), info->getSrtt(), hop.getCost()};
rankedFaces.insert(stats);
}
}
FaceStatsSet::iterator it = rankedFaces.begin();
if (it != rankedFaces.end()) {
return it->face;
}
else {
return nullptr;
}
}
const std::string Component::to_string() const noexcept {
std::stringstream str;
str<<className()<<":: id: "<<getId()<<" active: "<<isActive()<<" "<<getTransform()->to_string()<<" sort value: "<<getValueForSorting();
return str.str();
}
const bool Component::operator<(Component& other) noexcept {
return getValueForSorting() < other.getValueForSorting();
}
