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prevent duplicate entries for push infos

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Athou
2013-05-22 11:25:29 +02:00
parent cafcfc4c9f
commit eff84c69af
2 changed files with 45 additions and 1 deletions
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40
src/main/java/com/commafeed/backend/services/FeedPushInfoService.java Normal file
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package com.commafeed.backend.services;
import java.util.List;
import javax.ejb.Lock;
import javax.ejb.LockType;
import javax.ejb.Singleton;
import javax.inject.Inject;
import com.commafeed.backend.dao.FeedPushInfoDAO;
import com.commafeed.backend.model.Feed;
import com.commafeed.backend.model.FeedPushInfo;
import com.commafeed.backend.model.FeedPushInfo_;
@Singleton
public class FeedPushInfoService {
@Inject
FeedPushInfoDAO feedPushInfoDAO;
@Lock(LockType.WRITE)
public FeedPushInfo findOrCreate(Feed feed, String hub, String topic) {
FeedPushInfo info = null;
List<FeedPushInfo> infos = feedPushInfoDAO.findByField(
FeedPushInfo_.feed, feed);
if (infos.isEmpty()) {
info = new FeedPushInfo();
info.setFeed(feed);
info.setHub(hub);
info.setTopic(topic);
info.setActive(false);
feedPushInfoDAO.save(info);
} else {
info = infos.get(0);
}
return info;
}
}