tweak feed fetching

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

@@ -0,0 +1,51 @@
+package com.commafeed.backend.feeds;
+
+import java.util.Calendar;
+import java.util.concurrent.TimeUnit;
+
+import javax.ejb.AccessTimeout;
+import javax.ejb.Asynchronous;
+import javax.ejb.Lock;
+import javax.ejb.LockType;
+import javax.ejb.Stateless;
+import javax.inject.Inject;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import com.commafeed.backend.dao.FeedEntryService;
+import com.commafeed.backend.dao.FeedService;
+import com.commafeed.backend.model.Feed;
+
+@Stateless
+public class FeedUpdater {
+
+	private static Logger log = LoggerFactory.getLogger(FeedTimer.class);
+
+	@Inject
+	FeedFetcher fetcher;
+
+	@Inject
+	FeedService feedService;
+
+	@Inject
+	FeedEntryService feedEntryService;
+
+	@Asynchronous
+	@Lock(LockType.READ)
+	@AccessTimeout(value = 15, unit = TimeUnit.SECONDS)
+	public void update(Feed feed) {
+
+		try {
+			Feed fetchedFeed = fetcher.fetch(feed.getUrl());
+			feedEntryService.updateEntries(feed.getUrl(),
+					fetchedFeed.getEntries());
+		} catch (Exception e) {
+			log.info("Unable to refresh feed " + feed.getUrl() + " : "
+					+ e.getMessage());
+			feed.setLastUpdated(Calendar.getInstance().getTime());
+			feed.setMessage("Unable to refresh feed: " + e.getMessage());
+			feedService.update(feed);
+		}
+	}
+}