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added feeds cleanup method

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Athou
2013-06-19 17:01:28 +02:00
parent 01fde2fc16
commit 285baaafb7
4 changed files with 48 additions and 5 deletions
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21
src/main/java/com/commafeed/backend/dao/FeedDAO.java
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@@ -10,12 +10,15 @@ import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import javax.persistence.criteria.SetJoin;
import org.apache.commons.codec.digest.DigestUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.time.DateUtils;
import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedSubscription;
import com.commafeed.backend.model.FeedSubscription_;
import com.commafeed.backend.model.Feed_;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
@@ -92,4 +95,22 @@ public class FeedDAO extends GenericDAO<Feed> {
public List<Feed> findByTopic(String topic) {
return findByField(Feed_.pushTopicHash, DigestUtils.sha1Hex(topic));
}
public int deleteWithoutSubscriptions(int max) {
CriteriaQuery<Feed> query = builder.createQuery(getType());
Root<Feed> root = query.from(getType());
SetJoin<Feed, FeedSubscription> join = root.join(Feed_.subscriptions,
JoinType.LEFT);
query.where(builder.isNull(join.get(FeedSubscription_.id)));
TypedQuery<Feed> q = em.createQuery(query);
q.setMaxResults(max);
List<Feed> list = q.getResultList();
int deleted = list.size();
delete(list);
return deleted;
}
}