Method initialize

plugins/experimental/rate_limit/txn_limiter.cc:113–184

////////////////////////////////////////////////////////////////////////// Parse the configurations for the TXN limiter.

// Parse the configurations for the TXN limiter.
//
bool
TxnRateLimiter::initialize(int argc, const char *argv[])
{
  static const struct option longopt[] = {
    {const_cast<char *>("limit"),     required_argument, nullptr, 'l' },
    {const_cast<char *>("queue"),     required_argument, nullptr, 'q' },
    {const_cast<char *>("error"),     required_argument, nullptr, 'e' },
    {const_cast<char *>("retry"),     required_argument, nullptr, 'r' },
    {const_cast<char *>("header"),    required_argument, nullptr, 'h' },
    {const_cast<char *>("maxage"),    required_argument, nullptr, 'm' },
    {const_cast<char *>("prefix"),    required_argument, nullptr, 'p' },
    {const_cast<char *>("tag"),       required_argument, nullptr, 't' },
    {const_cast<char *>("conntrack"), no_argument,       nullptr, 'c' },
    {const_cast<char *>("rate"),      required_argument, nullptr, 'R' },
    // EOF
    {nullptr,                         no_argument,       nullptr, '\0'},
  };
  optind             = 1;
  std::string prefix = RATE_LIMITER_METRIC_PREFIX;
  std::string tag    = "";

  while (true) {
    int opt = getopt_long(argc, const_cast<char *const *>(argv), "", longopt, nullptr);

    switch (opt) {
    case 'l':
      this->_limit = strtol(optarg, nullptr, 10);
      break;
    case 'q':
      this->_max_queue = strtol(optarg, nullptr, 10);
      break;
    case 'e':
      this->_error = strtol(optarg, nullptr, 10);
      break;
    case 'r':
      this->_retry = strtol(optarg, nullptr, 10);
      break;
    case 'm':
      this->_max_age = std::chrono::milliseconds(strtol(optarg, nullptr, 10));
      break;
    case 'h':
      this->_header = optarg;
      break;
    case 'p':
      prefix = optarg;
      break;
    case 't':
      tag = optarg;
      break;
    case 'c':
      this->_conntrack = true;
      break;
    case 'R':
      this->_rate = strtol(optarg, nullptr, 10);
      break;
    }
    if (opt == -1) {
      break;