limit query execution time to 20s

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

@@ -95,6 +95,7 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
 
 		TypedQuery<FeedEntryStatus> q = em.createQuery(query);
 		limit(q, offset, limit);
+		setTimeout(q);
 		return lazyLoadContent(true, q.getResultList());
 	}
 
@@ -131,6 +132,7 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
 
 		TypedQuery<FeedEntryStatus> q = em.createQuery(query);
 		limit(q, offset, limit);
+		setTimeout(q);
 		return lazyLoadContent(includeContent, q.getResultList());
 	}
 
@@ -168,6 +170,7 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
 
 		TypedQuery<FeedEntryStatus> q = em.createQuery(query);
 		limit(q, offset, limit);
+		setTimeout(q);
 		return lazyLoadContent(includeContent, q.getResultList());
 	}
 
@@ -210,6 +213,7 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
 
 		TypedQuery<FeedEntryStatus> q = em.createQuery(query);
 		limit(q, offset, limit);
+		setTimeout(q);
 		return lazyLoadContent(includeContent, q.getResultList());
 	}
 
@@ -253,6 +257,7 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
 
 		TypedQuery<FeedEntryStatus> q = em.createQuery(query);
 		limit(q, offset, limit);
+		setTimeout(q);
 		return lazyLoadContent(includeContent, q.getResultList());
 	}
 
@@ -293,6 +298,10 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
 		}
 	}
 
+	private void setTimeout(Query query) {
+		query.setHint("javax.persistence.query.timeout", 20000);
+	}
+
 	public void markFeedEntries(User user, Feed feed, Date olderThan) {
 		List<FeedEntryStatus> statuses = findByFeed(feed, user, true,
 				ReadingOrder.desc, false);