| /******************************************************************** |
| * Copyright (c) 2013 - 2014, Pivotal Inc. |
| * All rights reserved. |
| * |
| * Author: Zhanwei Wang |
| ********************************************************************/ |
| /******************************************************************** |
| * 2014 - |
| * open source under Apache License Version 2.0 |
| ********************************************************************/ |
| /** |
| * 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. |
| */ |
| #ifndef _HDFS_LIBHDFS3_CLIENT_PACKETPOOL_H_ |
| #define _HDFS_LIBHDFS3_CLIENT_PACKETPOOL_H_ |
| #include "Memory.h" |
| |
| #include <deque> |
| |
| namespace Hdfs { |
| namespace Internal { |
| |
| class Packet; |
| |
| /* |
| * A simple packet pool implementation. |
| * |
| * Packet is created here if no packet is available. |
| * And then add to Pipeline's packet queue to wait for the ack. |
| * The Pipeline's packet queue size is not larger than the PacketPool's max size, |
| * otherwise the write operation will be pending for the ack. |
| * Once the ack is received, packet will reutrn back to the PacketPool to reuse. |
| */ |
| class PacketPool { |
| public: |
| PacketPool(int size); |
| shared_ptr<Packet> getPacket(int pktSize, int chunksPerPkt, |
| int64_t offsetInBlock, int64_t seqno, int checksumSize); |
| void relesePacket(shared_ptr<Packet> packet); |
| |
| void setMaxSize(int size) { |
| this->maxSize = size; |
| } |
| |
| int getMaxSize() const { |
| return maxSize; |
| } |
| |
| private: |
| int maxSize; |
| std::deque<shared_ptr<Packet> > packets; |
| }; |
| |
| } |
| } |
| |
| #endif /* _HDFS_LIBHDFS3_CLIENT_PACKETPOOL_H_ */ |