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1 | package be.nikiroo.fanfix.library; |
2 | ||
3 | import java.awt.image.BufferedImage; | |
4 | import java.io.File; | |
5 | import java.io.IOException; | |
6 | import java.util.List; | |
7 | ||
8 | import be.nikiroo.fanfix.Instance; | |
9 | import be.nikiroo.fanfix.bundles.UiConfig; | |
10 | import be.nikiroo.fanfix.data.MetaData; | |
11 | import be.nikiroo.fanfix.data.Story; | |
12 | import be.nikiroo.utils.Progress; | |
13 | ||
14 | /** | |
15 | * This library will cache another pre-existing {@link BasicLibrary}. | |
16 | * | |
17 | * @author niki | |
18 | */ | |
19 | public class CacheLibrary extends BasicLibrary { | |
20 | private List<MetaData> metas; | |
21 | private BasicLibrary lib; | |
22 | private LocalLibrary cacheLib; | |
23 | ||
24 | /** | |
25 | * Create a cache library around the given one. | |
26 | * <p> | |
27 | * It will return the same result, but those will be saved to disk at the | |
28 | * same time to be fetched quicker the next time. | |
29 | * | |
30 | * @param cacheDir | |
31 | * the cache directory where to save the files to disk | |
32 | * @param lib | |
33 | * the original library to wrap | |
34 | */ | |
35 | public CacheLibrary(File cacheDir, BasicLibrary lib) { | |
36 | this.cacheLib = new LocalLibrary(cacheDir, Instance.getUiConfig() | |
37 | .getString(UiConfig.GUI_NON_IMAGES_DOCUMENT_TYPE), Instance | |
38 | .getUiConfig().getString(UiConfig.GUI_IMAGES_DOCUMENT_TYPE), | |
39 | true); | |
40 | this.lib = lib; | |
41 | } | |
42 | ||
43 | @Override | |
44 | public String getLibraryName() { | |
45 | return lib.getLibraryName(); | |
46 | } | |
47 | ||
48 | @Override | |
49 | protected List<MetaData> getMetas(Progress pg) { | |
50 | if (pg == null) { | |
51 | pg = new Progress(); | |
52 | } | |
53 | ||
54 | if (metas == null) { | |
55 | metas = lib.getMetas(pg); | |
56 | } | |
57 | ||
58 | pg.done(); | |
59 | return metas; | |
60 | } | |
61 | ||
62 | @Override | |
63 | public synchronized File getFile(final String luid, Progress pg) { | |
64 | if (pg == null) { | |
65 | pg = new Progress(); | |
66 | } | |
67 | ||
68 | Progress pgImport = new Progress(); | |
69 | Progress pgGet = new Progress(); | |
70 | Progress pgRecall = new Progress(); | |
71 | ||
72 | pg.setMinMax(0, 5); | |
73 | pg.addProgress(pgImport, 3); | |
74 | pg.addProgress(pgGet, 1); | |
75 | pg.addProgress(pgRecall, 1); | |
76 | ||
77 | if (!isCached(luid)) { | |
78 | try { | |
79 | cacheLib.imprt(lib, luid, pgImport); | |
80 | pgImport.done(); | |
085a2f9a | 81 | clearCache(); |
ff05b828 | 82 | } catch (IOException e) { |
62c63b07 | 83 | Instance.getTraceHandler().error(e); |
ff05b828 NR |
84 | } |
85 | ||
86 | pgImport.done(); | |
87 | pgGet.done(); | |
88 | } | |
89 | ||
90 | File file = cacheLib.getFile(luid, pgRecall); | |
91 | pgRecall.done(); | |
92 | ||
93 | pg.done(); | |
94 | return file; | |
95 | } | |
96 | ||
97 | @Override | |
98 | public BufferedImage getCover(final String luid) { | |
ff05b828 NR |
99 | if (isCached(luid)) { |
100 | return cacheLib.getCover(luid); | |
101 | } | |
102 | ||
085a2f9a | 103 | // We could update the cache here, but it's not easy |
ff05b828 NR |
104 | return lib.getCover(luid); |
105 | } | |
106 | ||
085a2f9a NR |
107 | @Override |
108 | public BufferedImage getSourceCover(String source) { | |
109 | // no cache for the source cover | |
110 | return lib.getSourceCover(source); | |
111 | } | |
112 | ||
113 | @Override | |
114 | public void setSourceCover(String source, String luid) { | |
115 | lib.setSourceCover(source, luid); | |
116 | cacheLib.setSourceCover(source, getSourceCover(source)); | |
117 | } | |
118 | ||
ff05b828 NR |
119 | @Override |
120 | protected void clearCache() { | |
121 | metas = null; | |
122 | cacheLib.clearCache(); | |
123 | lib.clearCache(); | |
124 | } | |
125 | ||
126 | @Override | |
127 | public synchronized Story save(Story story, String luid, Progress pg) | |
128 | throws IOException { | |
129 | story = lib.save(story, luid, pg); | |
130 | clearCache(); | |
131 | return story; | |
132 | } | |
133 | ||
134 | @Override | |
135 | public synchronized void delete(String luid) throws IOException { | |
085a2f9a NR |
136 | if (isCached(luid)) { |
137 | cacheLib.delete(luid); | |
138 | } | |
ff05b828 NR |
139 | lib.delete(luid); |
140 | clearCache(); | |
141 | } | |
142 | ||
ff05b828 NR |
143 | @Override |
144 | public synchronized void changeSource(String luid, String newSource, | |
145 | Progress pg) throws IOException { | |
146 | if (pg == null) { | |
147 | pg = new Progress(); | |
148 | } | |
149 | ||
150 | Progress pgCache = new Progress(); | |
151 | Progress pgOrig = new Progress(); | |
152 | pg.setMinMax(0, 2); | |
153 | pg.addProgress(pgCache, 1); | |
154 | pg.addProgress(pgOrig, 1); | |
155 | ||
e06632ee NR |
156 | if (isCached(luid)) { |
157 | cacheLib.changeSource(luid, newSource, pgCache); | |
158 | } | |
ff05b828 NR |
159 | pgCache.done(); |
160 | lib.changeSource(luid, newSource, pgOrig); | |
161 | pgOrig.done(); | |
162 | ||
163 | pg.done(); | |
164 | } | |
165 | ||
166 | /** | |
167 | * Check if the {@link Story} denoted by this Library UID is present in the | |
168 | * cache. | |
169 | * | |
170 | * @param luid | |
171 | * the Library UID | |
172 | * | |
173 | * @return TRUE if it is | |
174 | */ | |
175 | public boolean isCached(String luid) { | |
176 | return cacheLib.getInfo(luid) != null; | |
177 | } | |
178 | ||
179 | /** | |
180 | * Clear the {@link Story} from the cache. | |
181 | * | |
182 | * @param luid | |
183 | * the story to clear | |
184 | * | |
185 | * @throws IOException | |
186 | * in case of I/O error | |
187 | */ | |
188 | public void clearFromCache(String luid) throws IOException { | |
e06632ee NR |
189 | if (isCached(luid)) { |
190 | cacheLib.delete(luid); | |
191 | clearCache(); | |
192 | } | |
ff05b828 NR |
193 | } |
194 | ||
195 | // All the following methods are only used by Save and Delete in | |
196 | // BasicLibrary: | |
197 | ||
198 | @Override | |
199 | protected int getNextId() { | |
200 | throw new java.lang.InternalError("Should not have been called"); | |
201 | } | |
202 | ||
203 | @Override | |
204 | protected void doDelete(String luid) throws IOException { | |
205 | throw new java.lang.InternalError("Should not have been called"); | |
206 | } | |
207 | ||
208 | @Override | |
209 | protected Story doSave(Story story, Progress pg) throws IOException { | |
210 | throw new java.lang.InternalError("Should not have been called"); | |
211 | } | |
212 | } |