diff options
Diffstat (limited to 'qpid/cpp/src/qpid/broker/RateTracker.cpp')
-rw-r--r-- | qpid/cpp/src/qpid/broker/RateTracker.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/broker/RateTracker.cpp b/qpid/cpp/src/qpid/broker/RateTracker.cpp new file mode 100644 index 0000000000..048349b658 --- /dev/null +++ b/qpid/cpp/src/qpid/broker/RateTracker.cpp @@ -0,0 +1,51 @@ +/* + * + * 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 |