@Override
public void updateComment(Comment comment)
throws NonExistingEntityException, IllegalArgumentException {
if (comment == null) {
throw new IllegalArgumentException("Comment is null.");
}
if (comment.getId() == null) {
throw new IllegalArgumentException("Comment id is null.");
}
commentCache = provider.getCacheContainer().getCache("commentcache");
if (!commentCache.containsKey(comment.getId())) {
throw new NonExistingEntityException("Comment does not exist in cache.");
}
try {
userTransaction.begin();
commentCache.put(comment.getId(), comment);
userTransaction.commit();
logger.info("Comment with id: " + comment.getId() + " was updated in cache store.");
} catch (Exception e) {
if (userTransaction != null) {
try {
userTransaction.rollback();
} catch (Exception e1) {
e1.printStackTrace();
}
}
logger.error("Error while updating comment.", e);
throw new CacheException(e);
}
}
@Override
public Comment getCommentById(String id) {
if (id == null) {
throw new IllegalArgumentException("Comment id is null.");
}
commentCache = provider.getCacheContainer().getCache("commentcache");
if (commentCache.containsKey(id)) {
return (Comment) commentCache.get(id);
} else {
return null;
}
}
@Override
public List<Comment> getCommentsBySongId(String songId) {
if (songId == null) {
throw new IllegalArgumentException("Song id is null.");
}
ArrayList<Comment> comments = new ArrayList<Comment>();
commentCache = provider.getCacheContainer().getCache("commentcache");
SearchManager sm = Search.getSearchManager((Cache<String, Object>) commentCache);
QueryBuilder queryBuilder = sm.buildQueryBuilderForClass(Comment.class).get();
Query q = queryBuilder.keyword().onField("songId").matching(songId).createQuery();
logger.debug("Lucene query: " + q);
CacheQuery cq = sm.getQuery(q, Comment.class);
for (Object o : cq.list()) {
if (o instanceof Comment) {
comments.add(((Comment) o));
}
}
return comments;
}
@Override
public void createComment(Comment comment)
throws IllegalEntityException, IllegalArgumentException, CacheException {
if (comment == null) {
throw new IllegalArgumentException("Comment is null.");
}
if (comment.getId() != null) {
throw new IllegalEntityException(
"Comment id is not null, Comment entity cannot be put into cache.");
}
commentCache = provider.getCacheContainer().getCache("commentcache");
comment.setId(UUIDStringGenerator.generateCommentId());
try {
userTransaction.begin();
commentCache.put(comment.getId(), comment);
userTransaction.commit();
logger.info(
"Comment with id: "
+ comment.getId()
+ ", songID"
+ comment.getSongId()
+ " was inserted to cache store.");
} catch (Exception e) {
if (userTransaction != null) {
try {
userTransaction.rollback();
} catch (Exception e1) {
e1.printStackTrace();
}
}
logger.error("Error while putting comment to the comment cache.", e);
throw new CacheException(e);
}
}