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database agnostic cleanup query

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Athou
2013-06-18 13:00:03 +02:00
parent e90425778f
commit 238a57cc27
4 changed files with 35 additions and 10 deletions
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28
src/main/java/com/commafeed/backend/dao/FeedEntryStatusDAO.java
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@@ -307,10 +307,30 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
query.setHint("javax.persistence.query.timeout", 20000);
}
public int delete(Date olderThan) {
Query query = em.createNamedQuery("EntryStatus.deleteOlderThan");
query.setParameter("olderThan", olderThan);
int deleted = query.executeUpdate();
public int delete(Date olderThan, int max) {
CriteriaQuery<Long> query = builder.createQuery(Long.class);
Root<FeedEntryStatus> root = query.from(getType());
query.select(root.get(FeedEntryStatus_.id));
Join<FeedEntryStatus, FeedEntry> entryJoin = root
.join(FeedEntryStatus_.entry);
Predicate p1 = builder.lessThan(entryJoin.get(FeedEntry_.inserted),
olderThan);
Predicate p2 = builder.isFalse(root.get(FeedEntryStatus_.starred));
query.where(p1, p2);
TypedQuery<Long> q = em.createQuery(query);
q.setMaxResults(max);
List<Long> ids = q.getResultList();
int deleted = 0;
if (ids.isEmpty() == false) {
Query deleteQuery = em.createNamedQuery("EntryStatus.deleteByIds");
deleteQuery.setParameter("ids", ids);
deleted = deleteQuery.executeUpdate();
}
return deleted;
}