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make sure we have something to do before entering synchronized block

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Athou
2013-05-30 12:57:14 +02:00
parent 4da9fca7ea
commit 47b9f49831
4 changed files with 73 additions and 34 deletions
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15
src/main/java/com/commafeed/backend/dao/FeedEntryDAO.java
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@@ -15,6 +15,7 @@ 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;
@Stateless
public class FeedEntryDAO extends GenericDAO<FeedEntry> {
@@ -30,6 +31,20 @@ public class FeedEntryDAO extends GenericDAO<FeedEntry> {
return q.getResultList();
}
public List<FeedEntry> findByGuids(List<String> guids) {
List<String> hashes = Lists.newArrayList();
for (String guid : guids) {
hashes.add(DigestUtils.sha1Hex(guid));
}
CriteriaQuery<FeedEntry> query = builder.createQuery(getType());
Root<FeedEntry> root = query.from(getType());
query.where(root.get(FeedEntry_.guidHash).in(hashes));
root.fetch(FeedEntry_.feeds, JoinType.LEFT);
TypedQuery<FeedEntry> q = em.createQuery(query);
return q.getResultList();
}
public List<FeedEntry> findByFeed(Feed feed, int offset, int limit) {
CriteriaQuery<FeedEntry> query = builder.createQuery(getType());
Root<FeedEntry> root = query.from(getType());

28
src/main/java/com/commafeed/backend/feeds/FeedRefreshUpdater.java
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@@ -14,12 +14,14 @@ import javax.annotation.PreDestroy;
import javax.inject.Inject;
import javax.inject.Singleton;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.commafeed.backend.MetricsBean;
import com.commafeed.backend.dao.FeedDAO;
import com.commafeed.backend.dao.FeedEntryDAO;
import com.commafeed.backend.dao.FeedSubscriptionDAO;
import com.commafeed.backend.model.ApplicationSettings;
import com.commafeed.backend.model.Feed;
@@ -29,6 +31,7 @@ import com.commafeed.backend.model.FeedSubscription;
import com.commafeed.backend.pubsubhubbub.SubscriptionHandler;
import com.commafeed.backend.services.ApplicationSettingsService;
import com.commafeed.backend.services.FeedUpdateService;
import com.google.common.collect.Lists;
import com.google.common.util.concurrent.Striped;
@Singleton
@@ -58,6 +61,9 @@ public class FeedRefreshUpdater {
@Inject
FeedSubscriptionDAO feedSubscriptionDAO;
@Inject
FeedEntryDAO feedEntryDAO;
private ThreadPoolExecutor pool;
private BlockingQueue<Runnable> queue;
private Striped<Lock> locks;
@@ -113,7 +119,7 @@ public class FeedRefreshUpdater {
@Override
public void run() {
boolean ok = true;
if (entries != null) {
if (CollectionUtils.isNotEmpty(entries) && hasWork()) {
List<FeedSubscription> subscriptions = feedSubscriptionDAO
.findByFeed(feed);
for (FeedEntry entry : entries) {
@@ -131,6 +137,26 @@ public class FeedRefreshUpdater {
taskGiver.giveBack(feed);
}
private boolean hasWork() {
boolean hasWork = false;
List<String> guids = Lists.newArrayList();
for (FeedEntry entry : entries) {
guids.add(entry.getGuid());
}
List<FeedEntry> existingEntries = feedEntryDAO.findByGuids(guids);
for (FeedEntry entry : entries) {
FeedEntry foundEntry = FeedUtils.findEntry(existingEntries,
entry);
if (foundEntry == null
|| FeedUtils.findFeed(foundEntry.getFeeds(), feed) == null) {
hasWork = true;
break;
}
}
return hasWork;
}
}
private boolean updateEntry(final Feed feed, final FeedEntry entry,

27
src/main/java/com/commafeed/backend/feeds/FeedUtils.java
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@@ -3,11 +3,13 @@ package com.commafeed.backend.feeds;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.ObjectUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang3.time.DateUtils;
import org.apache.commons.math.stat.descriptive.SummaryStatistics;
@@ -19,6 +21,7 @@ import org.mozilla.universalchardet.UniversalDetector;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedEntry;
import com.google.api.client.util.Lists;
@@ -93,6 +96,30 @@ public class FeedUtils {
return content;
}
public static FeedEntry findEntry(Collection<FeedEntry> list,
FeedEntry entry) {
FeedEntry found = null;
for (FeedEntry e : list) {
if (StringUtils.equals(entry.getGuid(), e.getGuid())
&& StringUtils.equals(entry.getUrl(), e.getUrl())) {
found = e;
break;
}
}
return found;
}
public static Feed findFeed(Collection<Feed> list, Feed feed) {
Feed found = null;
for (Feed f : list) {
if (ObjectUtils.equals(feed.getId(), f.getId())) {
found = f;
break;
}
}
return found;
}
public static String trimInvalidXmlCharacters(String xml) {
if (StringUtils.isBlank(xml)) {
return null;

37
src/main/java/com/commafeed/backend/services/FeedUpdateService.java
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@@ -2,14 +2,10 @@ package com.commafeed.backend.services;
import java.util.Calendar;
import java.util.List;
import java.util.Set;
import javax.ejb.Stateless;
import javax.inject.Inject;
import org.apache.commons.lang.ObjectUtils;
import org.apache.commons.lang.StringUtils;
import com.commafeed.backend.MetricsBean;
import com.commafeed.backend.dao.FeedEntryDAO;
import com.commafeed.backend.dao.FeedEntryStatusDAO;
@@ -40,7 +36,7 @@ public class FeedUpdateService {
public void updateEntry(Feed feed, FeedEntry entry,
List<FeedSubscription> subscriptions) {
FeedEntry foundEntry = findEntry(
FeedEntry foundEntry = FeedUtils.findEntry(
feedEntryDAO.findByGuid(entry.getGuid()), entry);
FeedEntry update = null;
@@ -56,11 +52,9 @@ public class FeedUpdateService {
entry.getFeeds().add(feed);
update = entry;
} else {
if (!findFeed(foundEntry.getFeeds(), feed)) {
foundEntry.getFeeds().add(feed);
update = foundEntry;
}
} else if (FeedUtils.findFeed(foundEntry.getFeeds(), feed) == null) {
foundEntry.getFeeds().add(feed);
update = foundEntry;
}
if (update != null) {
@@ -77,27 +71,4 @@ public class FeedUpdateService {
}
}
private FeedEntry findEntry(List<FeedEntry> existingEntries, FeedEntry entry) {
FeedEntry found = null;
for (FeedEntry existing : existingEntries) {
if (StringUtils.equals(entry.getGuid(), existing.getGuid())
&& StringUtils.equals(entry.getUrl(), existing.getUrl())) {
found = existing;
break;
}
}
return found;
}
private boolean findFeed(Set<Feed> feeds, Feed feed) {
boolean found = false;
for (Feed existingFeed : feeds) {
if (ObjectUtils.equals(existingFeed.getId(), feed.getId())) {
found = true;
break;
}
}
return found;
}
}