| #include "MessageGroupQueueSelector.h" |
| |
| #include <cassert> |
| #include <utility> |
| |
| ROCKETMQ_NAMESPACE_BEGIN |
| |
| MessageGroupQueueSelector::MessageGroupQueueSelector(std::string message_group) |
| : message_group_(std::move(message_group)) { |
| } |
| |
| MQMessageQueue MessageGroupQueueSelector::select(const std::vector<MQMessageQueue>& mqs, const MQMessage& msg, |
| void* arg) { |
| std::size_t hash_code = std::hash<std::string>{}(message_group_); |
| assert(!mqs.empty()); |
| std::size_t len = mqs.size(); |
| return mqs[hash_code % len]; |
| } |
| |
| ROCKETMQ_NAMESPACE_END |