absl::StatusOr AcsAgentClientReactor::GetIntValueFromInitialMetadata()

in cpp/acs_agent_client_reactor.cc [176:203]

• 25 lines of code
• 4 McCabe index (conditional complexity)

absl::StatusOr<T> AcsAgentClientReactor::GetIntValueFromInitialMetadata(
    const std::multimap<grpc::string_ref, grpc::string_ref>& metadata,
    const std::string& key) {
  if (metadata.count(key) == 0) {
    return absl::NotFoundError(absl::StrCat(
        "The key: ", key, " was not found in initial metadata from server."));
  }
  auto [range_begin, range_end] = metadata.equal_range(key);
  // Theoretically, there should be <=1 value for the quota keys in the initial
  // metadata of server. If there are multiple values, we will return the first
  // valid value.
  for (auto it = range_begin; it != range_end; ++it) {
    T value = 0;
    std::string value_str(it->second.data(), it->second.size());
    if (!absl::SimpleAtoi(value_str, &value)) {
      ABSL_LOG(WARNING) << "key: " << key
                        << " found in initial metadata from server but its "
                           "value having the wrong format: "
                        << value_str;
    } else {
      return value;
    }
  }
  return absl::NotFoundError(
      absl::StrCat("key: ", key,
                   " was found in initial metadata from server but its value "
                   "was not a valid integer."));
}