| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #include "kudu/rpc/request_tracker.h" |
| |
| #include <mutex> |
| #include <string> |
| #include <utility> |
| |
| #include "kudu/gutil/map-util.h" |
| |
| namespace kudu { |
| namespace rpc { |
| |
| const RequestTracker::SequenceNumber RequestTracker::kNoSeqNo = -1; |
| |
| RequestTracker::RequestTracker(std::string client_id) |
| : client_id_(std::move(client_id)), |
| next_(0) {} |
| |
| Status RequestTracker::NewSeqNo(SequenceNumber* seq_no) { |
| std::lock_guard<simple_spinlock> l(lock_); |
| *seq_no = next_; |
| InsertOrDie(&incomplete_rpcs_, *seq_no); |
| next_++; |
| return Status::OK(); |
| } |
| |
| RequestTracker::SequenceNumber RequestTracker::FirstIncomplete() { |
| std::lock_guard<simple_spinlock> l(lock_); |
| if (incomplete_rpcs_.empty()) return kNoSeqNo; |
| return *incomplete_rpcs_.begin(); |
| } |
| |
| void RequestTracker::RpcCompleted(const SequenceNumber& seq_no) { |
| std::lock_guard<simple_spinlock> l(lock_); |
| incomplete_rpcs_.erase(seq_no); |
| } |
| |
| } // namespace rpc |
| } // namespace kudu |