force a feed refresh when someone subscribes

src/main/java/com/commafeed/backend/feeds/FeedRefreshWorker.java

@@ -69,7 +69,16 @@ public class FeedRefreshWorker {
 		}
 		return new AsyncResult<Void>(null);
 	}
-
+	
+	@Asynchronous
+	public void updateAsync(Feed feed){
+		try {
+			update(feed);
+		} catch (Exception e) {
+			log.error(e.getMessage(), e);
+		}
+	}
+	
 	private void update(Feed feed) throws NotSupportedException,
 			SystemException, SecurityException, IllegalStateException,
 			RollbackException, HeuristicMixedException,

src/main/java/com/commafeed/backend/services/FeedSubscriptionService.java

@@ -37,7 +37,7 @@ public class FeedSubscriptionService {
 	FeedSubscriptionDAO feedSubscriptionDAO;
 
 	@Lock(LockType.WRITE)
-	public void subscribe(User user, String url, String title,
+	public Feed subscribe(User user, String url, String title,
 			FeedCategory category) {
 
 		Feed feed = feedDAO.findByUrl(url);
@@ -72,5 +72,6 @@ public class FeedSubscriptionService {
 			}
 			feedEntryStatusDAO.save(statuses);
 		}
+		return feed;
 	}
 }