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Diffstat (limited to 'qpid/cpp/src/qpid/broker/Fairshare.h')
-rw-r--r-- | qpid/cpp/src/qpid/broker/Fairshare.h | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/qpid/cpp/src/qpid/broker/Fairshare.h b/qpid/cpp/src/qpid/broker/Fairshare.h new file mode 100644 index 0000000000..e7c8b04ecf --- /dev/null +++ b/qpid/cpp/src/qpid/broker/Fairshare.h @@ -0,0 +1,60 @@ +#ifndef QPID_BROKER_FAIRSHARE_H +#define QPID_BROKER_FAIRSHARE_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/broker/PriorityQueue.h" + +namespace qpid { +namespace broker { +struct QueueSettings; + +/** + * Modifies a basic priority queue by limiting the number of messages + * from each priority level that are dispatched before allowing + * dispatch from the next level. + */ +class Fairshare : public PriorityQueue +{ + public: + Fairshare(size_t levels, uint limit); + bool getState(uint& priority, uint& count) const; + bool setState(uint priority, uint count); + void setLimit(size_t level, uint limit); + bool isNull(); + static std::auto_ptr<Messages> create(const QueueSettings& settings); + static bool getState(const Messages&, uint& priority, uint& count); + static bool setState(Messages&, uint priority, uint count); + private: + std::vector<uint> limits; + + uint priority; + uint count; + + uint currentLevel(); + uint nextLevel(); + bool limitReached(); + Priority firstLevel(); + bool nextLevel(Priority& ); +}; +}} // namespace qpid::broker + +#endif /*!QPID_BROKER_FAIRSHARE_H*/ |