| 136 | } |
| 137 | |
| 138 | void get(CounterResponse* response) { |
| 139 | // In consideration of consistency. GetRequest to follower should be |
| 140 | // rejected. |
| 141 | if (!is_leader()) { |
| 142 | // This node is a follower or it's not up-to-date. Redirect to |
| 143 | // the leader if possible. |
| 144 | return redirect(response); |
| 145 | } |
| 146 | |
| 147 | // This is the leader and is up-to-date. It's safe to respond client |
| 148 | response->set_success(true); |
| 149 | response->set_value(_value.load(butil::memory_order_relaxed)); |
| 150 | } |
| 151 | |
| 152 | bool is_leader() const |
| 153 | { return _leader_term.load(butil::memory_order_acquire) > 0; } |