pulsar-client-cpp/lib/Backoff.cc

/**
 * Copyright 2016 Yahoo Inc.
 *
 * Licensed 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 "Backoff.h"
#include <algorithm>

namespace pulsar {

Backoff::Backoff(const TimeDuration& initial, const TimeDuration& max)
        : initial_(initial),
          max_(max),
          next_(initial) {
}

TimeDuration Backoff::next() {
    TimeDuration current = next_;
    next_ = std::min(next_ * 2, max_);
    return current;
}

void Backoff::reset() {
    next_ = initial_;
}

}  //pulsar - namespace end