private IEnumerable <SyndicationItem> GetFromCacheOrFactory(SyndicationItemFactory syndicationFactory, SyndicationFeedPageType currentPage, IEnumerable <Category> parsedCategories)
{
var cacheTime = currentPage.CacheFeedforSeconds;
string categoryQuery = string.Empty;
foreach (var category in parsedCategories)
{
categoryQuery += category.Name;
}
var cacheKey = string.Format("SyndicationFeedPageType_{0}_{1}", currentPage.ContentLink.ToString(), categoryQuery);
var cachedItems = CacheManager.Get(cacheKey) as IEnumerable <SyndicationItem>;
if (cachedItems == null)
{
cachedItems = syndicationFactory.GetSyndicationItems();
if (cacheTime > 0)
{
var cachePolicy = new CacheEvictionPolicy(new[] { DataFactoryCache.PageCommonCacheKey(currentPage.ContentLink) }
, new TimeSpan(0, 0, cacheTime),
CacheTimeoutType.Absolute);
CacheManager.Insert(cacheKey, syndicationFactory.GetSyndicationItems(), cachePolicy);
}
}
return(cachedItems);
}
public ActionResult Index(SyndicationFeedPageType currentPage)
{
var syndicationFactory = new SyndicationItemFactory(ContentLoader, FeedContentResolver, currentPage);
var feed = new SyndicationFeed
{
Items = syndicationFactory.GetSyndicationItems(),
Id = currentPage.ContentGuid.ToString(),
Title = new TextSyndicationContent(currentPage.PageName),
Description = new TextSyndicationContent(currentPage.Description),
};
if (feed.Items.Any())
{
feed.LastUpdatedTime = feed.Items.Max(m => m.LastUpdatedTime);
}
if (currentPage.FeedFormat == FeedFormat.Atom)
{
return(new AtomActionResult(feed));
}
return(new RssActionResult(feed));
}