private void update(FeedType feedType, UpdateType updateType) {
ArticleDao articleDao = DbConnection.getSession().getArticleDao();
SQLiteDatabase db = articleDao.getDatabase();
db.beginTransaction();
try {
Integer latestID = null;
if (feedType == FeedType.Main || feedType == FeedType.Archive) {
WhereCondition cond =
feedType == FeedType.Main
? ArticleDao.Properties.Archive.notEq(true)
: ArticleDao.Properties.Archive.eq(true);
List<Article> l =
articleDao
.queryBuilder()
.where(cond)
.orderDesc(ArticleDao.Properties.ArticleId)
.limit(1)
.list();
if (!l.isEmpty()) {
latestID = l.get(0).getArticleId();
}
}
if (!updateByFeed(articleDao, feedType, updateType, latestID)) {
return;
}
db.setTransactionSuccessful();
} finally {
db.endTransaction();
}
}
private void updateAllFeeds() {
Log.i(TAG, "updateAllFeeds() started");
ArticleDao articleDao = DbConnection.getSession().getArticleDao();
SQLiteDatabase db = articleDao.getDatabase();
Log.d(TAG, "updateAllFeeds() beginning transaction");
db.beginTransaction();
try {
Log.d(TAG, "updateAllFeeds() deleting old articles");
articleDao.deleteAll();
Log.d(TAG, "updateAllFeeds() updating Main feed");
if (!updateByFeed(articleDao, FeedType.Main, UpdateType.Full, 0)) {
Log.w(TAG, "updateAllFeeds() Main feed update failed; exiting");
return;
}
Log.d(TAG, "updateAllFeeds() updating Archive feed");
if (!updateByFeed(articleDao, FeedType.Archive, UpdateType.Full, 0)) {
Log.w(TAG, "updateAllFeeds() Archive feed update failed; exiting");
return;
}
Log.d(TAG, "updateAllFeeds() updating Favorite feed");
if (!updateByFeed(articleDao, FeedType.Favorite, UpdateType.Fast, 0)) {
Log.w(TAG, "updateAllFeeds() Favorite feed update failed; exiting");
return;
}
Log.d(TAG, "updateAllFeeds() setting transaction successful");
db.setTransactionSuccessful();
} finally {
Log.d(TAG, "updateAllFeeds() ending transaction");
db.endTransaction();
}
Log.d(TAG, "updateAllFeeds() finished");
}
private void processFeed(
ArticleDao articleDao,
InputStream is,
FeedType feedType,
UpdateType updateType,
Integer latestID)
throws XmlPullParserException, IOException {
// TODO: use parser.require() all over the place?
XmlPullParser parser = Xml.newPullParser();
parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, false);
parser.setInput(is, null);
parser.nextTag();
parser.require(XmlPullParser.START_TAG, null, "rss");
goToElement(parser, "channel", true);
parser.next();
DateFormat dateFormat = new SimpleDateFormat("EEE, dd MMM yyyy HH:mm:ss Z", Locale.US);
while (parser.next() != XmlPullParser.END_DOCUMENT) {
if (parser.getEventType() != XmlPullParser.START_TAG) {
continue;
}
if ("item".equals(parser.getName())) {
if (feedType == FeedType.Main
|| feedType == FeedType.Archive
|| (feedType == FeedType.Favorite && updateType == UpdateType.Full)) {
// Main: Full, Fast
// Archive: Full, Fast
// Favorite: Full
Item item = parseItem(parser);
Integer id = getIDFromURL(item.sourceUrl);
if (updateType == UpdateType.Fast && latestID != null && id != null && latestID >= id)
break;
Article article =
articleDao
.queryBuilder()
.where(ArticleDao.Properties.ArticleId.eq(id))
.build()
.unique();
boolean existing = true;
if (article == null) {
article = new Article(null);
existing = false;
}
article.setTitle(item.title);
article.setContent(item.description);
article.setUrl(item.link);
article.setArticleId(id);
try {
article.setUpdateDate(dateFormat.parse(item.pubDate));
} catch (ParseException e) {
e.printStackTrace();
}
if (existing) {
if (feedType == FeedType.Archive) {
article.setArchive(true);
} else if (feedType == FeedType.Favorite) {
article.setFavorite(true);
}
} else {
article.setArchive(feedType == FeedType.Archive);
article.setFavorite(feedType == FeedType.Favorite);
}
articleDao.insertOrReplace(article);
} else if (feedType == FeedType.Favorite) {
// Favorite: Fast (ONLY applicable if Main and Archive feeds are up to date)
// probably a bit faster then "Favorite: Full"
Integer id = parseItemID(parser);
if (id == null) continue;
Article article =
articleDao
.queryBuilder()
.where(ArticleDao.Properties.ArticleId.eq(id))
.build()
.unique();
if (article.getFavorite() != null && article.getFavorite()) continue;
article.setFavorite(true);
articleDao.update(article);
}
} else {
skipElement(parser);
}
}
}
