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materialize the manytomany relationship to have better control over queries

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Athou
2013-07-04 23:40:25 +02:00
parent d57a1c9e2a
commit 4efa18f9e6
8 changed files with 110 additions and 70 deletions
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12
src/main/java/com/commafeed/backend/dao/FeedDAO.java
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@@ -88,18 +88,6 @@ public class FeedDAO extends GenericDAO<Feed> {
return null;
}
public Feed findByIdWithEntries(Long feedId, int offset, int limit) {
CriteriaQuery<Feed> query = builder.createQuery(getType());
Root<Feed> root = query.from(getType());
query.where(builder.equal(root.get(Feed_.id), feedId));
root.fetch(Feed_.entries, JoinType.LEFT);
TypedQuery<Feed> q = em.createQuery(query);
limit(q, offset, limit);
return q.getSingleResult();
}
public List<Feed> findByTopic(String topic) {
return findByField(Feed_.pushTopicHash, DigestUtils.sha1Hex(topic));
}

19
src/main/java/com/commafeed/backend/dao/FeedEntryDAO.java
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@@ -18,7 +18,8 @@ import org.slf4j.LoggerFactory;
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.commafeed.backend.model.FeedFeedEntry;
import com.commafeed.backend.model.FeedFeedEntry_;
import com.commafeed.backend.services.ApplicationSettingsService;
import com.google.common.collect.Iterables;
@@ -33,11 +34,11 @@ public class FeedEntryDAO extends GenericDAO<FeedEntry> {
public static class EntryWithFeed {
public FeedEntry entry;
public Feed feed;
public FeedFeedEntry ffe;
public EntryWithFeed(FeedEntry entry, Feed feed) {
public EntryWithFeed(FeedEntry entry, FeedFeedEntry ffe) {
this.entry = entry;
this.feed = feed;
this.ffe = ffe;
}
}
@@ -52,7 +53,7 @@ public class FeedEntryDAO extends GenericDAO<FeedEntry> {
EntryWithFeed result = null;
List<EntryWithFeed> list = q.getResultList();
for (EntryWithFeed ewf : list) {
if (ewf.entry != null && ewf.feed != null) {
if (ewf.entry != null && ewf.ffe != null) {
result = ewf;
break;
}
@@ -66,9 +67,9 @@ public class FeedEntryDAO extends GenericDAO<FeedEntry> {
public List<FeedEntry> findByFeed(Feed feed, int offset, int limit) {
CriteriaQuery<FeedEntry> query = builder.createQuery(getType());
Root<FeedEntry> root = query.from(getType());
SetJoin<FeedEntry, Feed> feedsJoin = root.join(FeedEntry_.feeds);
SetJoin<FeedEntry, FeedFeedEntry> feedsJoin = root.join(FeedEntry_.feedRelationships);
query.where(builder.equal(feedsJoin.get(Feed_.id), feed.getId()));
query.where(builder.equal(feedsJoin.get(FeedFeedEntry_.feed), feed));
query.orderBy(builder.desc(root.get(FeedEntry_.updated)));
TypedQuery<FeedEntry> q = em.createQuery(query);
limit(q, offset, limit);
@@ -94,9 +95,9 @@ public class FeedEntryDAO extends GenericDAO<FeedEntry> {
CriteriaQuery<FeedEntry> query = builder.createQuery(getType());
Root<FeedEntry> root = query.from(getType());
SetJoin<FeedEntry, Feed> join = root.join(FeedEntry_.feeds,
SetJoin<FeedEntry, FeedFeedEntry> join = root.join(FeedEntry_.feedRelationships,
JoinType.LEFT);
query.where(builder.isNull(join.get(Feed_.id)));
query.where(builder.isNull(join.get(FeedFeedEntry_.feed)));
TypedQuery<FeedEntry> q = em.createQuery(query);
q.setMaxResults(max);

19
src/main/java/com/commafeed/backend/dao/FeedEntryStatusDAO.java
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@@ -16,7 +16,6 @@ import javax.persistence.criteria.Path;
import javax.persistence.criteria.Predicate;
import javax.persistence.criteria.Root;
import javax.persistence.criteria.Selection;
import javax.persistence.criteria.SetJoin;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;
@@ -31,6 +30,8 @@ import com.commafeed.backend.model.FeedEntryContent_;
import com.commafeed.backend.model.FeedEntryStatus;
import com.commafeed.backend.model.FeedEntryStatus_;
import com.commafeed.backend.model.FeedEntry_;
import com.commafeed.backend.model.FeedFeedEntry;
import com.commafeed.backend.model.FeedFeedEntry_;
import com.commafeed.backend.model.FeedSubscription;
import com.commafeed.backend.model.FeedSubscription_;
import com.commafeed.backend.model.Feed_;
@@ -139,8 +140,8 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
CriteriaQuery<Tuple> query = builder.createTupleQuery();
Root<FeedEntry> root = query.from(FeedEntry.class);
SetJoin<FeedEntry, Feed> feedJoin = root.join(FeedEntry_.feeds);
SetJoin<Feed, FeedSubscription> subJoin = feedJoin
Join<FeedFeedEntry, Feed> feedJoin = root.join(FeedEntry_.feedRelationships).join(FeedFeedEntry_.feed);
Join<Feed, FeedSubscription> subJoin = feedJoin
.join(Feed_.subscriptions);
Join<FeedEntry, FeedEntryContent> contentJoin = root
.join(FeedEntry_.content);
@@ -231,8 +232,8 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
CriteriaQuery<Tuple> query = builder.createTupleQuery();
Root<FeedEntry> root = query.from(FeedEntry.class);
SetJoin<FeedEntry, Feed> feedJoin = root.join(FeedEntry_.feeds);
SetJoin<Feed, FeedSubscription> subJoin = feedJoin
Join<FeedFeedEntry, Feed> feedJoin = root.join(FeedEntry_.feedRelationships).join(FeedFeedEntry_.feed);
Join<Feed, FeedSubscription> subJoin = feedJoin
.join(Feed_.subscriptions);
Selection<FeedEntry> entryAlias = root.alias("entry");
@@ -317,8 +318,8 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
CriteriaQuery<FeedEntry> query = builder.createQuery(FeedEntry.class);
Root<FeedEntry> root = query.from(FeedEntry.class);
SetJoin<FeedEntry, Feed> feedJoin = root.join(FeedEntry_.feeds);
SetJoin<Feed, FeedSubscription> subJoin = feedJoin
Join<FeedFeedEntry, Feed> feedJoin = root.join(FeedEntry_.feedRelationships).join(FeedFeedEntry_.feed);
Join<Feed, FeedSubscription> subJoin = feedJoin
.join(Feed_.subscriptions);
List<Predicate> predicates = Lists.newArrayList();
@@ -388,8 +389,8 @@ public class FeedEntryStatusDAO extends GenericDAO<FeedEntryStatus> {
CriteriaQuery<Tuple> query = builder.createTupleQuery();
Root<FeedEntry> root = query.from(FeedEntry.class);
SetJoin<FeedEntry, Feed> feedJoin = root.join(FeedEntry_.feeds);
SetJoin<Feed, FeedSubscription> subJoin = feedJoin
Join<FeedFeedEntry, Feed> feedJoin = root.join(FeedEntry_.feedRelationships).join(FeedFeedEntry_.feed);
Join<Feed, FeedSubscription> subJoin = feedJoin
.join(Feed_.subscriptions);
Selection<FeedEntry> entryAlias = root.alias("entry");

32
src/main/java/com/commafeed/backend/model/Feed.java
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@@ -4,11 +4,10 @@ import java.util.Date;
import java.util.Set;
import javax.persistence.Cacheable;
import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.PreRemove;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
@@ -17,8 +16,6 @@ import javax.persistence.Transient;
import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;
import com.google.common.collect.Sets;
@Entity
@Table(name = "FEEDS")
@SuppressWarnings("serial")
@@ -111,8 +108,8 @@ public class Feed extends AbstractModel {
@Column(length = 40)
private String lastContentHash;
@ManyToMany(mappedBy = "feeds")
private Set<FeedEntry> entries = Sets.newHashSet();
@OneToMany(mappedBy = "feed", cascade = CascadeType.REMOVE)
private Set<FeedFeedEntry> entryRelationships;
@OneToMany(mappedBy = "feed")
private Set<FeedSubscription> subscriptions;
@@ -145,13 +142,6 @@ public class Feed extends AbstractModel {
@Transient
private boolean urgent;
@PreRemove
private void removeEntriesFromFeed() {
for (FeedEntry entry : entries) {
entry.getFeeds().remove(this);
}
}
public Feed() {
}
@@ -176,14 +166,6 @@ public class Feed extends AbstractModel {
this.lastUpdated = lastUpdated;
}
public Set<FeedEntry> getEntries() {
return entries;
}
public void setEntries(Set<FeedEntry> entries) {
this.entries = entries;
}
public String getMessage() {
return message;
}
@@ -344,4 +326,12 @@ public class Feed extends AbstractModel {
this.normalizedUrlHash = normalizedUrlHash;
}
public Set<FeedFeedEntry> getEntryRelationships() {
return entryRelationships;
}
public void setEntryRelationships(Set<FeedFeedEntry> entryRelationships) {
this.entryRelationships = entryRelationships;
}
}

25
src/main/java/com/commafeed/backend/model/FeedEntry.java
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@@ -9,8 +9,6 @@ import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.JoinColumn;
import javax.persistence.JoinTable;
import javax.persistence.ManyToMany;
import javax.persistence.OneToMany;
import javax.persistence.OneToOne;
import javax.persistence.Table;
@@ -20,8 +18,6 @@ import javax.persistence.TemporalType;
import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;
import com.google.api.client.util.Sets;
@Entity
@Table(name = "FEEDENTRIES")
@SuppressWarnings("serial")
@@ -35,9 +31,8 @@ public class FeedEntry extends AbstractModel {
@Column(length = 40, nullable = false)
private String guidHash;
@ManyToMany
@JoinTable(name = "FEED_FEEDENTRIES", joinColumns = { @JoinColumn(name = "FEEDENTRY_ID", nullable = false, updatable = false) }, inverseJoinColumns = { @JoinColumn(name = "FEED_ID", nullable = false, updatable = false) })
private Set<Feed> feeds = Sets.newHashSet();
@OneToMany(mappedBy = "entry", cascade = CascadeType.REMOVE)
private Set<FeedFeedEntry> feedRelationships;
@OneToOne(cascade = CascadeType.ALL, fetch = FetchType.LAZY, optional = false)
@JoinColumn(nullable = false, updatable = false)
@@ -82,14 +77,6 @@ public class FeedEntry extends AbstractModel {
this.updated = updated;
}
public Set<Feed> getFeeds() {
return feeds;
}
public void setFeeds(Set<Feed> feeds) {
this.feeds = feeds;
}
public Set<FeedEntryStatus> getStatuses() {
return statuses;
}
@@ -130,4 +117,12 @@ public class FeedEntry extends AbstractModel {
this.author = author;
}
public Set<FeedFeedEntry> getFeedRelationships() {
return feedRelationships;
}
public void setFeedRelationships(Set<FeedFeedEntry> feedRelationships) {
this.feedRelationships = feedRelationships;
}
}

57
src/main/java/com/commafeed/backend/model/FeedFeedEntry.java Normal file
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@@ -0,0 +1,57 @@
package com.commafeed.backend.model;
import java.io.Serializable;
import javax.persistence.Cacheable;
import javax.persistence.Entity;
import javax.persistence.Id;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import org.hibernate.annotations.Cache;
import org.hibernate.annotations.CacheConcurrencyStrategy;
@Entity
@Table(name = "FEED_FEEDENTRIES")
@SuppressWarnings("serial")
@Cacheable
@Cache(usage = CacheConcurrencyStrategy.TRANSACTIONAL)
public class FeedFeedEntry implements Serializable {
@Id
@ManyToOne
@JoinColumn(name = "FEED_ID")
private Feed feed;
@Id
@ManyToOne
@JoinColumn(name = "FEEDENTRY_ID")
private FeedEntry entry;
public FeedFeedEntry() {
}
public FeedFeedEntry(Feed feed, FeedEntry entry) {
this.feed = feed;
this.entry = entry;
}
public Feed getFeed() {
return feed;
}
public void setFeed(Feed feed) {
this.feed = feed;
}
public FeedEntry getEntry() {
return entry;
}
public void setEntry(FeedEntry entry) {
this.entry = entry;
}
}

14
src/main/java/com/commafeed/backend/services/FeedUpdateService.java
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@@ -5,6 +5,8 @@ import java.util.List;
import javax.ejb.Stateless;
import javax.inject.Inject;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import com.commafeed.backend.MetricsBean;
import com.commafeed.backend.cache.CacheService;
@@ -17,12 +19,16 @@ import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedEntry;
import com.commafeed.backend.model.FeedEntryContent;
import com.commafeed.backend.model.FeedEntryStatus;
import com.commafeed.backend.model.FeedFeedEntry;
import com.commafeed.backend.model.FeedSubscription;
import com.commafeed.backend.model.User;
import com.google.common.collect.Lists;
@Stateless
public class FeedUpdateService {
@PersistenceContext
protected EntityManager em;
@Inject
FeedSubscriptionDAO feedSubscriptionDAO;
@@ -46,6 +52,7 @@ public class FeedUpdateService {
entry.getUrl(), feed.getId());
FeedEntry update = null;
FeedFeedEntry ffe = null;
if (existing == null) {
entry.setAuthor(FeedUtils.truncate(FeedUtils.handleContent(
entry.getAuthor(), feed.getLink(), true), 128));
@@ -56,11 +63,11 @@ public class FeedUpdateService {
feed.getLink(), false));
entry.setInserted(new Date());
entry.getFeeds().add(feed);
ffe = new FeedFeedEntry(feed, entry);
update = entry;
} else if (existing.feed == null) {
existing.entry.getFeeds().add(feed);
} else if (existing.ffe == null) {
ffe = new FeedFeedEntry(feed, existing.entry);
update = existing.entry;
}
@@ -78,6 +85,7 @@ public class FeedUpdateService {
cache.invalidateUserData(users.toArray(new User[0]));
feedEntryDAO.saveOrUpdate(update);
feedEntryStatusDAO.saveOrUpdate(statusUpdateList);
em.persist(ffe);
metricsBean.entryUpdated(statusUpdateList.size());
}
}