| #ifndef QPID_BROKER_RATETRACKER_H |
| #define QPID_BROKER_RATETRACKER_H |
| |
| /* |
| * |
| * 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/sys/Time.h" |
| |
| namespace qpid { |
| namespace broker { |
| |
| /** |
| * Simple rate tracker: represents some value that can be incremented, |
| * then can periodcially sample the rate of increments. |
| */ |
| class RateTracker |
| { |
| public: |
| RateTracker(); |
| /** |
| * Increments the count being tracked. Can be called concurrently |
| * with other calls to this operator as well as with calls to |
| * sampleRatePerSecond(). |
| */ |
| RateTracker& operator++(); |
| /** |
| * Returns the rate of increments per second since last |
| * called. Calls to this method should be serialised, but can be |
| * called concurrently with the increment operator |
| */ |
| double sampleRatePerSecond(); |
| private: |
| volatile int32_t currentCount; |
| int32_t lastCount; |
| qpid::sys::AbsTime lastTime; |
| }; |
| }} // namespace qpid::broker |
| |
| #endif /*!QPID_BROKER_RATETRACKER_H*/ |