const std::vector<McrouterRouteHandlePtr>*
RouteHandleMap::getTargetsForKeyFast(folly::StringPiece prefix,
folly::StringPiece key) const {
// empty prefix => route to default route
if (prefix.empty()) {
return &getBySingleRoute(defaultRoute_, key);
}
// route to all routes
if (prefix == "/*/*/") {
return &allRoutes_->getTargetsForKey(key);
}
auto starPos = prefix.find("*");
if (starPos == std::string::npos) {
// no stars at all
return &getBySingleRoute(prefix, key);
}
if (prefix.endsWith("/*/") && starPos == prefix.size() - 2) {
// route to all clusters of some region (/region/*/)
auto region = prefix.subpiece(1, prefix.size() - 4);
auto it = byRegion_.find(region);
if (it == byRegion_.end()) {
return &emptyV_;
}
return &it->second->getTargetsForKey(key);
}
// no other types supported
return nullptr;
}
const std::vector<McrouterRouteHandlePtr>*
RouteHandleMap::getTargetsForKeyFast(folly::StringPiece prefix,
folly::StringPiece key) const {
const std::vector<McrouterRouteHandlePtr>* result = nullptr;
if (prefix.empty()) {
// empty prefix => route to default route
result = &defaultRouteMap_->getTargetsForKey(key);
} else if (prefix == "/*/*/") {
// route to all routes
result = &allRoutes_->getTargetsForKey(key);
} else {
auto starPos = prefix.find("*");
if (starPos == std::string::npos) {
// no stars at all
auto it = byRoute_.find(prefix);
result = it == byRoute_.end()
? &emptyV_
: &it->second->getTargetsForKey(key);
} else if (prefix.endsWith("/*/") && starPos == prefix.size() - 2) {
// route to all clusters of some region (/region/*/)
auto region = prefix.subpiece(1, prefix.size() - 4);
auto it = byRegion_.find(region);
result = it == byRegion_.end()
? &emptyV_
: &it->second->getTargetsForKey(key);
}
}
if (sendInvalidRouteToDefault_ && result != nullptr && result->empty()) {
return &defaultRouteMap_->getTargetsForKey(key);
}
return result;
}