added on-demand database cleanup (date is hardcoded for the moment)

src/main/java/com/commafeed/backend/DatabaseCleaner.java

@@ -0,0 +1,29 @@
+package com.commafeed.backend;
+
+import java.util.Calendar;
+import java.util.List;
+import java.util.concurrent.TimeUnit;
+
+import javax.ejb.Stateless;
+import javax.inject.Inject;
+
+import com.commafeed.backend.dao.FeedEntryDAO;
+import com.commafeed.backend.model.FeedEntry;
+
+@Stateless
+public class DatabaseCleaner {
+
+	@Inject
+	FeedEntryDAO feedEntryDAO;
+
+	public void cleanOlderThan(long value, TimeUnit unit) {
+		Calendar cal = Calendar.getInstance();
+		cal.add(Calendar.MINUTE, -1 * (int) unit.toMinutes(value));
+
+		List<FeedEntry> entries = feedEntryDAO.findByInserted(cal.getTime());
+		for (FeedEntry entry : entries) {
+			feedEntryDAO.delete(entry.getStatuses());
+		}
+		feedEntryDAO.delete(entries);
+	}
+}