package com.skyline.feed.service.impl;
import java.util.ArrayList;
import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.skyline.feed.dao.PersonalFeedDao;
import com.skyline.feed.model.FeedResult;
import com.skyline.feed.service.PersonalFeedService;
import com.skyline.feed.type.FeedType;
import com.skyline.wo.model.Article;
/**
* 个人推信的实现
*
* @author Jairus Chan
*
*/
@Service("personalFeedService")
public class PersonalFeedServiceImpl implements PersonalFeedService {
@Autowired
private PersonalFeedDao personalFeedDao;
@Value("${feed.pagination.minPageSize}")
private Integer MIN_PAGE_SIZE;
@Value("${feed.personalFeed.maxFeedLevel}")
private Integer MAX_FEED_LEVEL;
@Override
@Deprecated
public void addFeed(Long resourceId, String title, String content, Long providerId, String providerNickname, String providerPortrait,
Long ownerId, FeedType type) {
personalFeedDao.insertFeed(resourceId, title, content, providerId, providerNickname, providerPortrait, ownerId, type);
}
@Override
public void addArticleFeed(Article article) {
personalFeedDao.insertFeed(article.getId(), article.getTitle(), article.getDigest(), article.getOwnerId(),
article.getOwnerNickname(), article.getOwnerPortrait(), article.getOwnerId(), FeedType.ARTICLE);
}
@Override
public FeedResult getFeeds(Long ownerId, Integer current, Integer level) {
FeedResult result = new FeedResult();
List<DBObject> resultData = new ArrayList<DBObject>();
// 当返回推信数目小于MIN_PAGE_SIZE则会自动也去找下一级的personalFeed
while (resultData.size() < MIN_PAGE_SIZE) {
// 当找完了所有的personalFeed后，break；MAX_FEED_LEVEL表示最大的personalFeed的index;level
// >= MAX_FEED_LEVEL意味找完了所有的personalFeed
if (level > MAX_FEED_LEVEL) {
break;
}
DBCursor cursor = personalFeedDao.queryFeeds(ownerId, current, level);
// while(cursor.hasNext()){
// resultData.add(cursor.next());
// }
List<DBObject> feeds = cursor.toArray();
resultData.addAll(feeds);
// 当返回推信数目小于MIN_PAGE_SIZE，则将currentPage置为0,并会自动也去找下一级的personalFeed
if (resultData.size() < MIN_PAGE_SIZE) {
current = 0;
level = level + 1;
} else {
current = feeds.size();
}
}
result.setCurrent(current);
result.setData(resultData);
result.setLevel(level);
return result;
}
@Override
public List<DBObject> getFeeds(List<Long> ownerIds, Integer level, Long lastQueryTime) {
DBCursor cursor = personalFeedDao.queryFeeds(ownerIds, level, lastQueryTime);
List<DBObject> objs = new ArrayList<DBObject>();
while (cursor.hasNext()) {
objs.add(cursor.next());
}
return objs;
}
}