McrouterRouteHandlePtr makeFailoverWithExptimeRoute(
RouteHandleFactory<McrouterRouteHandleIf>& factory,
const folly::dynamic& json) {
checkLogic(json.isObject(), "FailoverWithExptimeRoute is not an object");
McrouterRouteHandlePtr normal;
if (auto jnormal = json.get_ptr("normal")) {
normal = factory.create(*jnormal);
}
std::vector<McrouterRouteHandlePtr> failoverTargets;
if (auto jfailover = json.get_ptr("failover")) {
failoverTargets = factory.createList(*jfailover);
}
int32_t failoverExptime = 60;
if (auto jexptime = json.get_ptr("failover_exptime")) {
checkLogic(jexptime->isInt(), "FailoverWithExptimeRoute: "
"failover_exptime is not an integer");
failoverExptime = jexptime->getInt();
}
// Check if only one format is being used
checkLogic(!(json.count("settings") && // old
(json.count("failover_errors") || json.count("failover_tag"))), // new
"Use either 'settings' (old format) or 'failover_errors' / 'failover_tag'"
);
// new format
FailoverErrorsSettings failoverErrors;
bool failoverTagging = false;
if (auto jfailoverTag = json.get_ptr("failover_tag")) {
checkLogic(jfailoverTag->isBool(),
"FailoverWithExptime: failover_tag is not bool");
failoverTagging = jfailoverTag->getBool();
}
if (auto jfailoverErrors = json.get_ptr("failover_errors")) {
failoverErrors = FailoverErrorsSettings(*jfailoverErrors);
}
// old format
if (auto jsettings = json.get_ptr("settings")) {
VLOG(1) << "FailoverWithExptime: This config format is deprecated. "
"Use 'failover_errors' instead of 'settings'.";
auto oldSettings = FailoverWithExptimeSettings(*jsettings);
failoverTagging = oldSettings.failoverTagging;
failoverErrors = oldSettings.getFailoverErrors();
}
return makeFailoverWithExptimeRoute(
std::move(normal),
std::move(failoverTargets),
failoverExptime,
std::move(failoverErrors),
failoverTagging);
}
McrouterRouteHandlePtr makeLatestRoute(
const folly::dynamic& json,
std::vector<McrouterRouteHandlePtr> targets) {
size_t failoverCount = 5;
FailoverErrorsSettings failoverErrors;
if (json.isObject()) {
if (auto jfailoverCount = json.get_ptr("failover_count")) {
checkLogic(jfailoverCount->isInt(),
"LatestRoute: failover_count is not an integer");
failoverCount = jfailoverCount->getInt();
}
if (auto jFailoverErrors = json.get_ptr("failover_errors")) {
failoverErrors = FailoverErrorsSettings(*jFailoverErrors);
}
}
return makeLatestRoute(std::move(targets), failoverCount,
std::move(failoverErrors));
}
McrouterRouteHandlePtr makeFailoverRoute(
const folly::dynamic& json,
std::vector<McrouterRouteHandlePtr> children) {
FailoverErrorsSettings failoverErrors;
std::unique_ptr<FailoverRateLimiter> rateLimiter;
bool failoverTagging = false;
if (json.isObject()) {
if (auto jFailoverErrors = json.get_ptr("failover_errors")) {
failoverErrors = FailoverErrorsSettings(*jFailoverErrors);
}
if (auto jFailoverTag = json.get_ptr("failover_tag")) {
checkLogic(jFailoverTag->isBool(),
"Failover: failover_tag is not bool");
failoverTagging = jFailoverTag->getBool();
}
if (auto jFailoverLimit = json.get_ptr("failover_limit")) {
rateLimiter = folly::make_unique<FailoverRateLimiter>(*jFailoverLimit);
}
}
return makeFailoverRoute(std::move(children), std::move(failoverErrors),
std::move(rateLimiter), failoverTagging);
}
