virtual void allocate()

in src/consumer/AllocateMQStrategy.h [40:91]

• 45 lines of code
• 14 McCabe index (conditional complexity)

  virtual void allocate(const std::string& currentCID,
                        std::vector<MQMessageQueue>& mqAll,
                        std::vector<std::string>& cidAll,
                        std::vector<MQMessageQueue>& outReuslt) {
    outReuslt.clear();
    if (currentCID.empty()) {
      THROW_MQEXCEPTION(MQClientException, "currentCID is empty", -1);
    }

    if (mqAll.empty()) {
      THROW_MQEXCEPTION(MQClientException, "mqAll is empty", -1);
    }

    if (cidAll.empty()) {
      THROW_MQEXCEPTION(MQClientException, "cidAll is empty", -1);
    }

    int index = -1;
    int cidAllSize = cidAll.size();
    for (int i = 0; i < cidAllSize; i++) {
      if (cidAll[i] == currentCID) {
        index = i;
        break;
      }
    }

    if (index == -1) {
      LOG_ERROR("could not find clientId from Broker");
      return;
    }

    int mqAllSize = mqAll.size();
    int mod = mqAllSize % cidAllSize;
    int averageSize =
        mqAllSize <= cidAllSize ? 1 : (mod > 0 && index < mod ? mqAllSize / cidAllSize + 1 : mqAllSize / cidAllSize);
    int startIndex = (mod > 0 && index < mod) ? index * averageSize : index * averageSize + mod;
    int range = (std::min)(averageSize, mqAllSize - startIndex);
    LOG_INFO(
        "range is:%d, index is:%d, mqAllSize is:%d, averageSize is:%d, "
        "startIndex is:%d",
        range, index, mqAllSize, averageSize, startIndex);
    //<!out;
    if (range >= 0)  // example: range is:-1, index is:1, mqAllSize is:1,
                     // averageSize is:1, startIndex is:2
    {
      for (int i = 0; i < range; i++) {
        if ((startIndex + i) >= 0) {
          outReuslt.push_back(mqAll.at((startIndex + i) % mqAllSize));
        }
      }
    }
  }