use a onetomany relationship for push info to avoid hibernate automatic lazy loading of onetoone optional relationships

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

@@ -67,7 +67,7 @@ public class FeedDAO extends GenericDAO<Feed> {
 
 		List<Feed> feeds = q.getResultList();
 		for (Feed feed : feeds) {
-			FeedPushInfo info = feed.getPushInfo();
+			FeedPushInfo info = Iterables.getFirst(feed.getPushInfo(), null);
 			if (info != null) {
 				info.getTopic();
 			}

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

@@ -29,6 +29,7 @@ import com.commafeed.backend.model.FeedSubscription;
 import com.commafeed.backend.pubsubhubbub.SubscriptionHandler;
 import com.commafeed.backend.services.ApplicationSettingsService;
 import com.commafeed.backend.services.FeedUpdateService;
+import com.google.common.collect.Iterables;
 import com.google.common.util.concurrent.Striped;
 
 @Singleton
@@ -157,7 +158,7 @@ public class FeedRefreshUpdater {
 	}
 
 	private void handlePubSub(final Feed feed) {
-		FeedPushInfo info = feed.getPushInfo();
+		FeedPushInfo info = Iterables.getFirst(feed.getPushInfo(), null);
 		if (info != null && info.isActive() == false) {
 			new Thread() {
 				@Override

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

@@ -18,6 +18,7 @@ import com.commafeed.backend.model.FeedEntry;
 import com.commafeed.backend.model.FeedPushInfo;
 import com.commafeed.backend.services.ApplicationSettingsService;
 import com.commafeed.backend.services.FeedPushInfoService;
+import com.google.common.collect.Iterables;
 import com.sun.syndication.io.FeedException;
 
 public class FeedRefreshWorker {
@@ -85,7 +86,6 @@ public class FeedRefreshWorker {
 
 	private void update(Feed feed) {
 
-
 		try {
 			FetchedFeed fetchedFeed = fetcher.fetch(feed.getUrl(), false,
 					feed.getLastModifiedHeader(), feed.getEtagHeader());
@@ -156,11 +156,11 @@ public class FeedRefreshWorker {
 				topic = "http://" + topic;
 			}
 			log.debug("feed {} has pubsub info: {}", feed.getUrl(), topic);
-			FeedPushInfo info = feed.getPushInfo();
+			FeedPushInfo info = Iterables.getFirst(feed.getPushInfo(), null);
 			if (info == null) {
 				info = feedPushInfoService.findOrCreate(feed, hub, topic);
+				feed.getPushInfo().add(info);
 			}
-			feed.setPushInfo(info);
 		}
 	}
 

src/main/java/com/commafeed/backend/model/Feed.java

@@ -9,7 +9,6 @@ import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.ManyToMany;
 import javax.persistence.OneToMany;
-import javax.persistence.OneToOne;
 import javax.persistence.Table;
 import javax.persistence.Temporal;
 import javax.persistence.TemporalType;
@@ -69,9 +68,11 @@ public class Feed extends AbstractModel {
 	@Column(length = 255)
 	private String etagHeader;
 
-	@OneToOne(fetch = FetchType.LAZY, mappedBy = "feed", cascade = {
+	@OneToMany(fetch = FetchType.LAZY, mappedBy = "feed", cascade = {
 			CascadeType.PERSIST, CascadeType.MERGE })
-	private FeedPushInfo pushInfo;
+	// use a onetomany relationship for push info to avoid hibernate automatic
+	// lazy loading of onetoone optional relationships
+	private Set<FeedPushInfo> pushInfo;
 
 	@ManyToMany(mappedBy = "feeds")
 	private Set<FeedEntry> entries = Sets.newHashSet();
@@ -183,11 +184,11 @@ public class Feed extends AbstractModel {
 		this.lastUpdateSuccess = lastUpdateSuccess;
 	}
 
-	public FeedPushInfo getPushInfo() {
+	public Set<FeedPushInfo> getPushInfo() {
 		return pushInfo;
 	}
 
-	public void setPushInfo(FeedPushInfo pushInfo) {
+	public void setPushInfo(Set<FeedPushInfo> pushInfo) {
 		this.pushInfo = pushInfo;
 	}
 

src/main/java/com/commafeed/backend/model/FeedPushInfo.java

@@ -4,7 +4,7 @@ import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.JoinColumn;
-import javax.persistence.OneToOne;
+import javax.persistence.ManyToOne;
 import javax.persistence.Table;
 
 import org.hibernate.annotations.Index;
@@ -15,7 +15,7 @@ import org.hibernate.annotations.Index;
 public class FeedPushInfo extends AbstractModel {
 
 	@JoinColumn(unique = true)
-	@OneToOne(fetch = FetchType.LAZY)
+	@ManyToOne(fetch = FetchType.LAZY)
 	private Feed feed;
 
 	@Column(length = 2048, nullable = false)

src/main/java/com/commafeed/backend/pubsubhubbub/SubscriptionHandler.java

@@ -23,6 +23,7 @@ import com.commafeed.backend.feeds.FeedUtils;
 import com.commafeed.backend.model.Feed;
 import com.commafeed.backend.model.FeedPushInfo;
 import com.commafeed.backend.services.ApplicationSettingsService;
+import com.google.common.collect.Iterables;
 import com.google.common.collect.Lists;
 
 public class SubscriptionHandler {
@@ -37,7 +38,7 @@ public class SubscriptionHandler {
 	FeedPushInfoDAO feedPushInfoDAO;
 
 	public void subscribe(Feed feed) {
-		FeedPushInfo info = feed.getPushInfo();
+		FeedPushInfo info = Iterables.getFirst(feed.getPushInfo(), null);
 		String hub = info.getHub();
 		String topic = info.getTopic();
 		String publicUrl = FeedUtils