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faster existing entry detection

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Athou
2013-06-23 15:14:14 +02:00
parent 65ce971267
commit 8936a0c784
3 changed files with 28 additions and 41 deletions
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47
src/main/java/com/commafeed/backend/dao/FeedEntryDAO.java
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@@ -6,54 +6,41 @@ import java.util.List;
import javax.ejb.Stateless;
import javax.persistence.TypedQuery;
import javax.persistence.criteria.CriteriaQuery;
import javax.persistence.criteria.JoinType;
import javax.persistence.criteria.Root;
import javax.persistence.criteria.SetJoin;
import org.apache.commons.codec.digest.DigestUtils;
import org.hibernate.Hibernate;
import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedEntry;
import com.commafeed.backend.model.FeedEntry_;
import com.commafeed.backend.model.Feed_;
import com.google.common.collect.Lists;
import com.google.common.collect.Iterables;
@Stateless
public class FeedEntryDAO extends GenericDAO<FeedEntry> {
public List<FeedEntry> findByGuid(String guid) {
String hash = DigestUtils.sha1Hex(guid);
public static class EntryWithFeed {
public FeedEntry entry;
public Feed feed;
CriteriaQuery<FeedEntry> query = builder.createQuery(getType());
Root<FeedEntry> root = query.from(getType());
query.where(builder.equal(root.get(FeedEntry_.guidHash), hash));
TypedQuery<FeedEntry> q = em.createQuery(query);
List<FeedEntry> list = q.getResultList();
return list;
public EntryWithFeed(FeedEntry entry, Feed feed) {
this.entry = entry;
this.feed = feed;
}
}
public List<FeedEntry> findByGuids(List<String> guids) {
List<String> hashes = Lists.newArrayList();
for (String guid : guids) {
hashes.add(DigestUtils.sha1Hex(guid));
}
public EntryWithFeed findExisting(String guid, String url, Long feedId) {
CriteriaQuery<FeedEntry> query = builder.createQuery(getType());
Root<FeedEntry> root = query.from(getType());
TypedQuery<EntryWithFeed> q = em.createNamedQuery(
"EntryStatus.existing", EntryWithFeed.class);
q.setParameter("guidHash", DigestUtils.sha1Hex(guid));
q.setParameter("url", url);
q.setParameter("feedId", feedId);
query.distinct(true);
query.where(root.get(FeedEntry_.guidHash).in(hashes));
root.fetch(FeedEntry_.feeds, JoinType.LEFT);
TypedQuery<FeedEntry> q = em.createQuery(query);
List<FeedEntry> list = q.getResultList();
for (FeedEntry entry : list) {
Hibernate.initialize(entry.getFeeds());
}
return list;
List<EntryWithFeed> resultList = q.getResultList();
EntryWithFeed ewf = Iterables.getFirst(resultList, null);
return ewf;
}
public List<FeedEntry> findByFeed(Feed feed, int offset, int limit) {

18
src/main/java/com/commafeed/backend/services/FeedUpdateService.java
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@@ -6,10 +6,9 @@ import java.util.List;
import javax.ejb.Stateless;
import javax.inject.Inject;
import org.hibernate.Hibernate;
import com.commafeed.backend.MetricsBean;
import com.commafeed.backend.dao.FeedEntryDAO;
import com.commafeed.backend.dao.FeedEntryDAO.EntryWithFeed;
import com.commafeed.backend.dao.FeedEntryStatusDAO;
import com.commafeed.backend.dao.FeedSubscriptionDAO;
import com.commafeed.backend.feeds.FeedUtils;
@@ -38,11 +37,11 @@ public class FeedUpdateService {
public void updateEntry(Feed feed, FeedEntry entry,
List<FeedSubscription> subscriptions) {
FeedEntry foundEntry = FeedUtils.findEntry(
feedEntryDAO.findByGuid(entry.getGuid()), entry);
EntryWithFeed existing = feedEntryDAO.findExisting(entry.getGuid(),
entry.getUrl(), feed.getId());
FeedEntry update = null;
if (foundEntry == null) {
if (existing == null) {
FeedEntryContent content = entry.getContent();
content.setTitle(FeedUtils.truncate(
FeedUtils.handleContent(content.getTitle(), feed.getLink()),
@@ -54,12 +53,9 @@ public class FeedUpdateService {
entry.getFeeds().add(feed);
update = entry;
} else {
Hibernate.initialize(foundEntry.getFeeds());
if (FeedUtils.findFeed(foundEntry.getFeeds(), feed) == null) {
foundEntry.getFeeds().add(feed);
update = foundEntry;
}
} else if (existing.feed == null) {
existing.entry.getFeeds().add(feed);
update = existing.entry;
}
if (update != null) {