package com.multysite.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.cache.Cache;
import javax.cache.CacheException;
import javax.cache.CacheManager;
import com.multysite.entity.News;
import com.multysite.model.NewsModel;
public class RecentViewHelper {
private static String cachePrefix = "recentViewCache_";
private static boolean isRegisted = false;
private static Cache cache = null;
public static void initCache() {
if (!isRegisted) {
isRegisted = true;
try {
cache = CacheManager.getInstance().getCacheFactory()
.createCache(Collections.emptyMap());
} catch (CacheException e) {
isRegisted = false;
}
}
}
@SuppressWarnings("unchecked")
public static List<News> getRecentView() {
initCache();
String prefix = cachePrefix;
boolean cached = false;
List<News> result = new ArrayList<News>();
if (cache != null) {
try {
result = (ArrayList<News>) cache.get(prefix);
if (result != null && result.size() > 0) {
cached = true;
}
} catch (Exception e) {
cached = false;
}
if (cached) {
if (result.size() >= 11) {
NewsModel model = new NewsModel();
model.setLimit(10);
model.setPage(1);
model.prepareList();
if (model.getListResult().size() > 0) {
result = model.getListResult();
}
cache.put(prefix, result);
}
}
}
if (!cached) {
NewsModel model = new NewsModel();
model.setLimit(10);
model.setPage(1);
model.prepareList();
if (model.getListResult().size() > 0) {
result = model.getListResult();
cache.put(prefix, result);
} else {
result = new ArrayList<News>();
}
}
return result;
}
@SuppressWarnings("unchecked")
public static void addRecentView(News tub) {
List<News> recentView = getRecentView();
for (int i = 0; i < recentView.size(); i++) {
if (recentView.get(i).getAlias().equals(tub.getAlias())) {
recentView.remove(i);
}
}
if (recentView.size() >= 10) {
recentView.remove(0);
}
recentView.add(tub);
initCache();
cache.put(cachePrefix, recentView);
}
}