refresh pubsubhubbub subscriptions every three days

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

@@ -1,6 +1,8 @@
 package com.commafeed.backend.feeds;
 
+import java.util.Calendar;
 import java.util.Collection;
+import java.util.Date;
 import java.util.List;
 import java.util.concurrent.ArrayBlockingQueue;
 import java.util.concurrent.BlockingQueue;
@@ -15,6 +17,7 @@ import javax.inject.Inject;
 import javax.inject.Singleton;
 
 import org.apache.commons.lang.StringUtils;
+import org.apache.commons.lang3.time.DateUtils;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
@@ -188,13 +191,17 @@ public class FeedRefreshUpdater {
 
 	private void handlePubSub(final Feed feed) {
 		FeedPushInfo info = feed.getPushInfo();
-		if (info != null && info.isActive() == false) {
-			new Thread() {
-				@Override
-				public void run() {
-					handler.subscribe(feed);
-				}
-			}.start();
+		if (info != null) {
+			Date lastPing = info.getLastPing();
+			Date now = Calendar.getInstance().getTime();
+			if (lastPing == null || lastPing.before(DateUtils.addDays(now, -3))) {
+				new Thread() {
+					@Override
+					public void run() {
+						handler.subscribe(feed);
+					}
+				}.start();
+			}
 		}
 	}
 

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

@@ -1,11 +1,15 @@
 package com.commafeed.backend.model;
 
+import java.util.Date;
+
 import javax.persistence.Column;
 import javax.persistence.Entity;
 import javax.persistence.FetchType;
 import javax.persistence.JoinColumn;
 import javax.persistence.OneToOne;
 import javax.persistence.Table;
+import javax.persistence.Temporal;
+import javax.persistence.TemporalType;
 
 import org.hibernate.annotations.Index;
 
@@ -25,7 +29,8 @@ public class FeedPushInfo extends AbstractModel {
 	@Column(length = 2048, nullable = false)
 	private String hub;
 
-	private boolean active;
+	@Temporal(TemporalType.TIMESTAMP)
+	private Date lastPing;
 
 	public String getTopic() {
 		return topic;
@@ -51,12 +56,12 @@ public class FeedPushInfo extends AbstractModel {
 		this.hub = hub;
 	}
 
-	public boolean isActive() {
-		return active;
+	public Date getLastPing() {
+		return lastPing;
 	}
 
-	public void setActive(boolean active) {
-		this.active = active;
+	public void setLastPing(Date lastPing) {
+		this.lastPing = lastPing;
 	}
 
 }

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

@@ -29,7 +29,6 @@ public class FeedPushInfoService {
 			info.setFeed(feed);
 			info.setHub(hub);
 			info.setTopic(topic);
-			info.setActive(false);
 			feedPushInfoDAO.save(info);
 		} else {
 			info = infos.get(0);

src/main/java/com/commafeed/frontend/rest/resources/PubSubHubbubCallbackREST.java

@@ -1,5 +1,6 @@
 package com.commafeed.frontend.rest.resources;
 
+import java.util.Calendar;
 import java.util.List;
 
 import javax.inject.Inject;
@@ -65,7 +66,7 @@ public class PubSubHubbubCallbackREST {
 			for (FeedPushInfo info : infos) {
 				log.debug("activated push notifications for {}",
 						info.getTopic());
-				info.setActive(true);
+				info.setLastPing(Calendar.getInstance().getTime());
 			}
 			feedPushInfoDAO.update(infos);
 			return Response.ok(challenge).build();