return count only (fixes #18)

src/main/java/com/commafeed/backend/dao/FeedEntryService.java

@@ -112,6 +112,14 @@ public class FeedEntryService extends GenericDAO<FeedEntry> {
 		return buildList(query.getResultList());
 	}
 
+	public Long getUnreadCount(Feed feed, User user) {
+		TypedQuery<Long> query = em.createNamedQuery("Entry.unreadByFeedCount",
+				Long.class);
+		query.setParameter("feed", feed);
+		query.setParameter("userId", user.getId());
+		return query.getSingleResult();
+	}
+
 	public List<FeedEntryWithStatus> getEntries(Feed feed, User user,
 			boolean unreadOnly) {
 		return getEntries(feed, user, unreadOnly, -1, -1);

src/main/java/com/commafeed/frontend/model/Subscription.java

@@ -9,7 +9,7 @@ public class Subscription implements Serializable {
 	private String name;
 	private String message;
 	private String feedUrl;
-	private int unread;
+	private long unread;
 
 	public Long getId() {
 		return id;
@@ -27,11 +27,11 @@ public class Subscription implements Serializable {
 		this.name = name;
 	}
 
-	public int getUnread() {
+	public long getUnread() {
 		return unread;
 	}
 
-	public void setUnread(int unread) {
+	public void setUnread(long unread) {
 		this.unread = unread;
 	}
 

src/main/java/com/commafeed/frontend/rest/resources/SubscriptionsREST.java

@@ -206,9 +206,8 @@ public class SubscriptionsREST extends AbstractREST {
 				sub.setName(subscription.getTitle());
 				sub.setMessage(subscription.getFeed().getMessage());
 				sub.setFeedUrl(subscription.getFeed().getLink());
-				// TODO use count instead of retrieving everything here
-				int size = feedEntryService.getEntries(subscription.getFeed(),
-						getUser(), true).size();
+				long size = feedEntryService.getUnreadCount(
+						subscription.getFeed(), getUser());
 				sub.setUnread(size);
 				category.getFeeds().add(sub);
 			}