Grcov report - http3_status_tracker

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#include "source/common/http/http3_status_tracker_impl.h"

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namespace Envoy {

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namespace Http {

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namespace {

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// Initially, HTTP/3 is marked broken for 1 second.

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const std::chrono::seconds DefaultExpirationTime{1};

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// Cap the broken period around a day and a half.

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const int MaxConsecutiveBrokenCount = 17;

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} // namespace

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Http3StatusTrackerImpl::Http3StatusTrackerImpl(Event::Dispatcher& dispatcher)

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    : expiration_timer_(dispatcher.createTimer([this]() -> void { onExpirationTimeout(); })) {}

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bool Http3StatusTrackerImpl::isHttp3Pending() const { return state_ == State::Pending; }

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bool Http3StatusTrackerImpl::isHttp3Broken() const { return state_ == State::Broken; }

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bool Http3StatusTrackerImpl::isHttp3Confirmed() const { return state_ == State::Confirmed; }

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bool Http3StatusTrackerImpl::hasHttp3FailedRecently() const {

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  return state_ == State::FailedRecently;

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void Http3StatusTrackerImpl::markHttp3Pending() { state_ = State::Pending; }

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void Http3StatusTrackerImpl::markHttp3Broken() {

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  state_ = State::Broken;

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  if (!expiration_timer_->enabled()) {

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    std::chrono::seconds expiration_in_sec =

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        DefaultExpirationTime * (1 << consecutive_broken_count_);

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    expiration_timer_->enableTimer(

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        std::chrono::duration_cast<std::chrono::milliseconds>(expiration_in_sec));

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    if (consecutive_broken_count_ < MaxConsecutiveBrokenCount) {

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      ++consecutive_broken_count_;

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void Http3StatusTrackerImpl::markHttp3Confirmed() {

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  state_ = State::Confirmed;

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  consecutive_broken_count_ = 0;

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  if (expiration_timer_->enabled()) {

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    expiration_timer_->disableTimer();

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void Http3StatusTrackerImpl::markHttp3FailedRecently() { state_ = State::FailedRecently; }

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void Http3StatusTrackerImpl::onExpirationTimeout() {

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  if (state_ != State::Broken) {

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    return;

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  state_ = State::FailedRecently;

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} // namespace Http

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} // namespace Envoy