/// <summary>
/// Retrieves the remote RSS feed and inserts it into the cache
/// when it has expired.
/// </summary>
private static void RefreshCache(string key, object item, CacheItemRemovedReason reason)
{
if (reason != CacheItemRemovedReason.Removed)
{
string feedUrl = key.Replace("RssReader_", String.Empty);
RssReader reader = new RssReader(feedUrl);
reader.Execute();
reader._UpdateFrequenzy = ((RssReader)item).UpdateFrequenzy;
HttpRuntime.Cache.Add("RssReader_" + feedUrl, reader, null, DateTime.Now.Add(reader.UpdateFrequenzy), Cache.NoSlidingExpiration, CacheItemPriority.Normal, RefreshCache);
}
}
/// <summary>
/// Creates an RssReader instance from the specified URL
/// and inserts it into the cache. When it expires from the cache,
/// it automatically retrieves the remote RSS feed and inserts it
/// to the cache again.
/// </summary>
/// <param name="feedUrl">The URI of the RSS feed.</param>
/// <param name="updateFrequenzy">The time before it should update it self.</param>
/// <returns>An instance of the RssReader class.</returns>
public static RssReader CreateAndCache(string feedUrl, TimeSpan updateFrequenzy)
{
if (HttpRuntime.Cache["RssReader_" + feedUrl] == null)
{
RssReader reader = new RssReader(feedUrl);
reader.Execute();
reader._UpdateFrequenzy = updateFrequenzy;
HttpRuntime.Cache.Add("RssReader_" + feedUrl, reader, null, DateTime.Now.Add(updateFrequenzy), Cache.NoSlidingExpiration, CacheItemPriority.Normal, RefreshCache);
}
return((RssReader)HttpContext.Current.Cache["RssReader_" + feedUrl]);
}
/// <summary>
/// Retrieves the remote RSS feed and inserts it into the cache
/// when it has expired.
/// </summary>
private static void RefreshCache(string key, object item, CacheItemRemovedReason reason)
{
if (reason != CacheItemRemovedReason.Removed)
{
string feedUrl = key.Replace("RssReader_", String.Empty);
RssReader reader = new RssReader(feedUrl);
reader.Execute();
reader._UpdateFrequenzy = ((RssReader)item).UpdateFrequenzy;
HttpRuntime.Cache.Add("RssReader_" + feedUrl, reader, null, DateTime.Now.Add(reader.UpdateFrequenzy), Cache.NoSlidingExpiration, CacheItemPriority.Normal, RefreshCache);
}
}
/// <summary>
/// Creates an RssReader instance from the specified URL
/// and inserts it into the cache. When it expires from the cache,
/// it automatically retrieves the remote RSS feed and inserts it
/// to the cache again.
/// </summary>
/// <param name="feedUrl">The URI of the RSS feed.</param>
/// <param name="updateFrequenzy">The time before it should update it self.</param>
/// <returns>An instance of the RssReader class.</returns>
public static RssReader CreateAndCache(string feedUrl, TimeSpan updateFrequenzy)
{
if (HttpRuntime.Cache["RssReader_" + feedUrl] == null)
{
RssReader reader = new RssReader(feedUrl);
reader.Execute();
reader._UpdateFrequenzy = updateFrequenzy;
HttpRuntime.Cache.Add("RssReader_" + feedUrl, reader, null, DateTime.Now.Add(updateFrequenzy), Cache.NoSlidingExpiration, CacheItemPriority.Normal, RefreshCache);
}
return (RssReader)HttpContext.Current.Cache["RssReader_" + feedUrl];
}