service/resource-encapsulation/src/resourceCache/include/DataCache.h

   1 //******************************************************************
   2 //
   3 // Copyright 2015 Samsung Electronics All Rights Reserved.
   4 //
   5 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
   6 //
   7 // Licensed under the Apache License, Version 2.0 (the "License");
   8 // you may not use this file except in compliance with the License.
   9 // You may obtain a copy of the License at
  10 //
  11 //      http://www.apache.org/licenses/LICENSE-2.0
  12 //
  13 // Unless required by applicable law or agreed to in writing, software
  14 // distributed under the License is distributed on an "AS IS" BASIS,
  15 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16 // See the License for the specific language governing permissions and
  17 // limitations under the License.
  18 //
  19 //-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
  20
  21 #ifndef RCM_DATACACHE_H_
  22 #define RCM_DATACACHE_H_
  23
  24 #include <list>
  25 #include <string>
  26 #include <memory>
  27 #include <mutex>
  28
  29 #include "CacheTypes.h"
  30 #include "ExpiryTimer.h"
  31
  32 namespace OIC
  33 {
  34     namespace Service
  35     {
  36         class DataCache : public std::enable_shared_from_this<DataCache>
  37         {
  38             public:
  39                 typedef unsigned int TimerID;
  40                 typedef std::function<void(TimerID)> TimerCB;
  41
  42             public:
  43                 DataCache();
  44                 ~DataCache();
  45
  46                 void initializeDataCache(PrimitiveResourcePtr pResource);
  47
  48                 CacheID addSubscriber(CacheCB func, REPORT_FREQUENCY rf, long repeatTime);
  49                 CacheID deleteSubscriber(CacheID id);
  50
  51                 CACHE_STATE getCacheState() const;
  52                 const RCSResourceAttributes getCachedData() const;
  53                 const PrimitiveResourcePtr getPrimitiveResource() const;
  54
  55                 void requestGet();
  56                 bool isEmptySubscriber() const;
  57                 bool isCachedData() const;
  58
  59             private:
  60                 // resource instance
  61                 PrimitiveResourcePtr sResource;
  62
  63                 // cached data info
  64                 RCSResourceAttributes attributes;
  65                 CACHE_STATE state;
  66                 CACHE_MODE mode;
  67                 bool isReady;
  68
  69                 // subscriber info
  70                 std::unique_ptr<SubscriberInfo> subscriberList;
  71                 mutable std::mutex m_mutex;
  72                 mutable std::mutex att_mutex;
  73
  74                 ExpiryTimer networkTimer;
  75                 ExpiryTimer pollingTimer;
  76                 TimerID networkTimeOutHandle;
  77                 TimerID pollingHandle;
  78
  79                 ObserveCB pObserveCB;
  80                 GetCB pGetCB;
  81                 TimerCB pTimerCB;
  82                 TimerCB pPollingCB;
  83
  84                 unsigned int lastSequenceNum;
  85
  86             public:
  87                 void onObserve(const HeaderOptions &_hos,
  88                                const ResponseStatement &_rep, int _result, int _seq);
  89                 void onGet(const HeaderOptions &_hos, const ResponseStatement &_rep, int _result);
  90             private:
  91                 void onTimeOut(const unsigned int timerID);
  92                 void onPollingOut(const unsigned int timerID);
  93
  94                 CacheID generateCacheID();
  95                 SubscriberInfoPair findSubscriber(CacheID id);
  96                 void notifyObservers(const RCSResourceAttributes Att);
  97         };
  98     } // namespace Service
  99 } // namespace OIC
 100
 101 #endif /* RCM_DATACACHE_H_ */