0
|
1 /**
|
|
2 * Orthanc - A Lightweight, RESTful DICOM Store
|
|
3 * Copyright (C) 2012-2015 Sebastien Jodogne, Medical Physics
|
|
4 * Department, University Hospital of Liege, Belgium
|
|
5 *
|
|
6 * This program is free software: you can redistribute it and/or
|
|
7 * modify it under the terms of the GNU Affero General Public License
|
|
8 * as published by the Free Software Foundation, either version 3 of
|
|
9 * the License, or (at your option) any later version.
|
|
10 *
|
|
11 * This program is distributed in the hope that it will be useful, but
|
|
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
14 * Affero General Public License for more details.
|
|
15 *
|
|
16 * You should have received a copy of the GNU Affero General Public License
|
|
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
18 **/
|
|
19
|
|
20
|
|
21 #include "ViewerPrefetchPolicy.h"
|
|
22
|
|
23 #include "ViewerToolbox.h"
|
|
24 #include "Cache/CacheScheduler.h"
|
|
25
|
|
26 #include <json/value.h>
|
|
27 #include <json/reader.h>
|
|
28
|
|
29
|
|
30
|
|
31 static const Json::Value::ArrayIndex PREFETCH_FORWARD = 10;
|
|
32 static const Json::Value::ArrayIndex PREFETCH_BACKWARD = 3;
|
|
33
|
|
34
|
|
35 namespace OrthancPlugins
|
|
36 {
|
|
37 void ViewerPrefetchPolicy::ApplySeries(std::list<CacheIndex>& toPrefetch,
|
|
38 CacheScheduler& cache,
|
|
39 const std::string& series,
|
|
40 const std::string& content)
|
|
41 {
|
|
42 Json::Value json;
|
|
43 Json::Reader reader;
|
|
44 if (!reader.parse(content, json) ||
|
|
45 !json.isMember("SortedInstances"))
|
|
46 {
|
|
47 return;
|
|
48 }
|
|
49
|
|
50 const Json::Value& instances = json["SortedInstances"];
|
|
51 if (instances.type() != Json::arrayValue)
|
|
52 {
|
|
53 return;
|
|
54 }
|
|
55
|
|
56 for (Json::Value::ArrayIndex i = 0;
|
|
57 i < instances.size() && i < PREFETCH_FORWARD;
|
|
58 i++)
|
|
59 {
|
|
60 std::string item = "jpeg95-" + instances[i].asString();
|
|
61 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item));
|
|
62 }
|
|
63 }
|
|
64
|
|
65
|
|
66 void ViewerPrefetchPolicy::ApplyInstance(std::list<CacheIndex>& toPrefetch,
|
|
67 CacheScheduler& cache,
|
|
68 const std::string& path)
|
|
69 {
|
|
70 size_t separator = path.find('-');
|
|
71 if (separator == std::string::npos)
|
|
72 {
|
|
73 return;
|
|
74 }
|
|
75
|
|
76 std::string compression = path.substr(0, separator + 1);
|
|
77 std::string instanceId = path.substr(separator + 1);
|
|
78
|
|
79 Json::Value instance;
|
|
80 if (!GetJsonFromOrthanc(instance, context_, "/instances/" + instanceId) ||
|
|
81 !instance.isMember("ParentSeries"))
|
|
82 {
|
|
83 return;
|
|
84 }
|
|
85
|
|
86 std::string tmp;
|
|
87 if (!cache.Access(tmp, CacheBundle_SeriesInformation, instance["ParentSeries"].asString()))
|
|
88 {
|
|
89 return;
|
|
90 }
|
|
91
|
|
92 Json::Value series;
|
|
93 Json::Reader reader;
|
|
94 if (!reader.parse(tmp, series) ||
|
|
95 !series.isMember("SortedInstances"))
|
|
96 {
|
|
97 return;
|
|
98 }
|
|
99
|
|
100 const Json::Value& instances = series["SortedInstances"];
|
|
101 if (instances.type() != Json::arrayValue)
|
|
102 {
|
|
103 return;
|
|
104 }
|
|
105
|
|
106 Json::Value::ArrayIndex position = 0;
|
|
107 while (position < instances.size())
|
|
108 {
|
|
109 if (instances[position] == instanceId)
|
|
110 {
|
|
111 break;
|
|
112 }
|
|
113
|
|
114 position++;
|
|
115 }
|
|
116
|
|
117 if (position == instances.size())
|
|
118 {
|
|
119 return;
|
|
120 }
|
|
121
|
|
122 for (Json::Value::ArrayIndex i = position;
|
|
123 i < instances.size() && i < position + PREFETCH_FORWARD;
|
|
124 i++)
|
|
125 {
|
|
126 std::string item = compression + instances[i].asString();
|
|
127 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item));
|
|
128 }
|
|
129
|
|
130 for (Json::Value::ArrayIndex i = position;
|
|
131 i >= 0 && i > position - PREFETCH_BACKWARD; )
|
|
132 {
|
|
133 i--;
|
|
134 std::string item = compression + instances[i].asString();
|
|
135 toPrefetch.push_back(CacheIndex(CacheBundle_DecodedImage, item));
|
|
136 }
|
|
137 }
|
|
138
|
|
139
|
|
140 void ViewerPrefetchPolicy::Apply(std::list<CacheIndex>& toPrefetch,
|
|
141 CacheScheduler& cache,
|
|
142 const CacheIndex& accessed,
|
|
143 const std::string& content)
|
|
144 {
|
|
145 switch (accessed.GetBundle())
|
|
146 {
|
|
147 case CacheBundle_SeriesInformation:
|
|
148 ApplySeries(toPrefetch, cache, accessed.GetItem(), content);
|
|
149 return;
|
|
150
|
|
151 case CacheBundle_DecodedImage:
|
|
152 ApplyInstance(toPrefetch, cache, accessed.GetItem());
|
|
153 return;
|
|
154
|
|
155 default:
|
|
156 return;
|
|
157 }
|
|
158 }
|
|
159 }
|
|
160
|