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delete operation does not support limit. limit on select and delete afterwards

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Athou
2013-09-18 09:24:31 +02:00
parent 305b68546c
commit 407481faa6
2 changed files with 21 additions and 10 deletions
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16
src/main/java/com/commafeed/backend/dao/FeedEntryStatusDAO.java
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@@ -290,11 +290,17 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
setTimeout(query, applicationSettingsService.get().getQueryTimeout());
}
public int deleteOldStatuses(Date olderThan, int limit) {
Query query = em.createNamedQuery("Statuses.deleteOld");
query.setParameter("date", olderThan);
query.setMaxResults(limit);
return query.executeUpdate();
public List<FeedEntryStatus> getOldStatuses(Date olderThan, int limit) {
CriteriaQuery<FeedEntryStatus> query = builder.createQuery(getType());
Root<FeedEntryStatus> root = query.from(getType());
Predicate p1 = builder.lessThan(root.get(FeedEntryStatus_.entryInserted), olderThan);
Predicate p2 = builder.isFalse(root.get(FeedEntryStatus_.starred));
query.where(p1, p2);
TypedQuery<FeedEntryStatus> q = em.createQuery(query);
q.setMaxResults(limit);
return q.getResultList();
}
}

15
src/main/java/com/commafeed/backend/services/DatabaseCleaningService.java
View File

@@ -1,6 +1,7 @@
package com.commafeed.backend.services;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.concurrent.TimeUnit;
@@ -15,6 +16,7 @@ import com.commafeed.backend.dao.FeedEntryDAO;
import com.commafeed.backend.dao.FeedEntryStatusDAO;
import com.commafeed.backend.dao.FeedSubscriptionDAO;
import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedEntryStatus;
import com.commafeed.backend.model.FeedSubscription;
/**
@@ -101,12 +103,15 @@ public class DatabaseCleaningService {
public long cleanStatusesOlderThan(Date olderThan) {
log.info("cleaning old read statuses");
long total = 0;
int deleted = -1;
List<FeedEntryStatus> list = Collections.emptyList();
do {
deleted = feedEntryStatusDAO.deleteOldStatuses(olderThan, 100);
total += deleted;
log.info("cleaned {} old read statuses", total);
} while (deleted != 0);
list = feedEntryStatusDAO.getOldStatuses(olderThan, 100);
if (!list.isEmpty()) {
feedEntryStatusDAO.delete(list);
total += list.size();
log.info("cleaned {} old read statuses", total);
}
} while (!list.isEmpty());
log.info("cleanup done: {} old read statuses deleted", total);
return total;
}