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/*
*
* 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 "qpid/broker/RateTracker.h"
using qpid::sys::AbsTime;
using qpid::sys::Duration;
using qpid::sys::TIME_SEC;
namespace qpid {
namespace broker {
RateTracker::RateTracker() : currentCount(0), lastCount(0), lastTime(AbsTime::now()) {}
RateTracker& RateTracker::operator++()
{
++currentCount;
return *this;
}
double RateTracker::sampleRatePerSecond()
{
int32_t increment = currentCount - lastCount;
AbsTime now = AbsTime::now();
Duration interval(lastTime, now);
lastCount = currentCount;
lastTime = now;
//if sampling at higher frequency than supported, will just return the number of increments
if (interval < TIME_SEC) return increment;
else if (increment == 0) return 0;
else return increment / (interval / TIME_SEC);
}
}} // namespace qpid::broker
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