public synchronized ArticlesIndex getIndex(OperationObserver observer) {
if (index == null) {
boolean imported = importFromResource();
File indexFile = getIndexFile();
observer.onOperationInfoChanged(OperationObserver.LOADING_CACHE, indexFile.getAbsolutePath());
if (!indexFile.exists()) {
log.info("Article index file does not exist:", indexFile);
index = new ArticlesIndex();
return index;
}
try {
index = JsonMapper.deserialize(indexFile, ArticlesIndex.class, typeResolver);
log.info("Article index loaded:", index.getArticlesCount(), "articles");
} catch (Exception ex) {
log.error("Article indes loading failed:", ex);
indexFile.delete();
return getIndex(observer);
}
if (imported) {
viewed.addAll(index.getArticles());
} else {
for (ArticleRef article : index.getArticles()) {
article.repairTitle();
}
}
}
return index;
}
public synchronized List<ArticleRef> updateIndex(OperationObserver observer) {
getIndex(observer);
List<ArticleRef> newArticles;
try {
newArticles = TestDe.update(index, observer);
} catch (ParseException ex1) {
throw new RuntimeException(ex1);
}
File indexFile = getIndexFile();
observer.onOperationInfoChanged(OperationObserver.SAVING, indexFile.getAbsolutePath());
try {
JsonMapper.serialize(index, indexFile);
} catch (IOException ex) {
throw new RuntimeException(ex);
}
return newArticles;
}