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1 /**
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2 * Transfers accelerator plugin for Orthanc
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3 * Copyright (C) 2018 Osimis, Belgium
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4 *
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5 * This program is free software: you can redistribute it and/or
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6 * modify it under the terms of the GNU Affero General Public License
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7 * as published by the Free Software Foundation, either version 3 of
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8 * the License, or (at your option) any later version.
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9 *
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10 * This program is distributed in the hope that it will be useful, but
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 * Affero General Public License for more details.
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14 *
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15 * You should have received a copy of the GNU Affero General Public License
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16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 **/
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18
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19
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20 #pragma once
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21
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22 #include "SourceDicomInstance.h"
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23 #include "TransferBucket.h"
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24
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25 #include <Core/Cache/LeastRecentlyUsedIndex.h>
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26
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27 #include <boost/thread/mutex.hpp>
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28
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29 namespace OrthancPlugins
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30 {
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31 class OrthancInstancesCache : public boost::noncopyable
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32 {
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33 private:
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34 class CacheAccessor : public boost::noncopyable
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35 {
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36 private:
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37 boost::mutex::scoped_lock lock_;
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38 SourceDicomInstance *instance_;
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39
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40 void CheckValid() const;
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41
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42 public:
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43 CacheAccessor(OrthancInstancesCache& cache,
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44 const std::string& instanceId);
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45
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46 bool IsValid() const
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47 {
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48 return instance_ != NULL;
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49 }
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50
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51 const DicomInstanceInfo& GetInfo() const;
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52
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53 void GetChunk(std::string& chunk,
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54 std::string& md5,
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55 size_t offset,
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56 size_t size);
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57 };
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58
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59
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60 typedef Orthanc::LeastRecentlyUsedIndex<std::string> Index;
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61 typedef std::map<std::string, SourceDicomInstance*> Content;
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62
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63 OrthancPluginContext* context_;
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64 boost::mutex mutex_;
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65 Index index_;
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66 Content content_;
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67 size_t memorySize_;
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68 size_t maxMemorySize_;
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69
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70
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71 // The mutex must be locked!
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72 void CheckInvariants();
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73
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74 // The mutex must be locked!
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75 void RemoveOldest();
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76
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77 // The mutex must be locked!
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78 void Store(const std::string& instanceId,
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79 std::auto_ptr<SourceDicomInstance>& instance);
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80
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81
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82 public:
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83 OrthancInstancesCache(OrthancPluginContext* context);
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84
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85 ~OrthancInstancesCache();
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86
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87 OrthancPluginContext* GetContext() const
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88 {
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89 return context_;
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90 }
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91
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92 size_t GetMemorySize();
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93
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94 size_t GetMaxMemorySize();
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95
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96 void SetMaxMemorySize(size_t size);
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97
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98 void GetInstanceInfo(size_t& size,
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99 std::string& md5,
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100 const std::string& instanceId);
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101
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102 void GetChunk(std::string& chunk,
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103 std::string& md5,
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104 const std::string& instanceId,
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105 size_t offset,
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106 size_t size);
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107
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108 void GetChunk(std::string& chunk,
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109 std::string& md5,
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110 const TransferBucket& bucket,
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111 size_t chunkIndex);
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112 };
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113 }
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