| /** |
| * 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. |
| */ |
| #ifndef _PULSAR_BACKOFF_HEADER_ |
| #define _PULSAR_BACKOFF_HEADER_ |
| #include <boost/date_time/posix_time/posix_time.hpp> |
| #include <boost/random/mersenne_twister.hpp> |
| #include <pulsar/defines.h> |
| |
| namespace pulsar { |
| |
| typedef boost::posix_time::time_duration TimeDuration; |
| |
| class PULSAR_PUBLIC Backoff { |
| public: |
| Backoff(const TimeDuration&, const TimeDuration&, const TimeDuration&); |
| TimeDuration next(); |
| void reset(); |
| |
| private: |
| const TimeDuration initial_; |
| const TimeDuration max_; |
| TimeDuration next_; |
| TimeDuration mandatoryStop_; |
| boost::posix_time::ptime firstBackoffTime_; |
| boost::random::mt19937 rng_; |
| bool mandatoryStopMade_ = false; |
| |
| friend class PulsarFriend; |
| }; |
| } // namespace pulsar |
| |
| #endif //_PULSAR_BACKOFF_HEADER_ |