/// <summary>
/// Returns Page object from cache. If page does not already exist in cache, it
/// will be read and added to cache
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public static Page Read(int id)
{
string cacheKey = Page.CacheKey(id);
ObjectCache cache = MemoryCache.Default;
Page page = cache[cacheKey] as Page;
if (page != null)
{
return(page);
}
else
{
Rock.CMS.PageService pageService = new CMS.PageService();
Rock.CMS.Page pageModel = pageService.Get(id);
if (pageModel != null)
{
Rock.Attribute.Helper.LoadAttributes(pageModel);
page = Page.CopyModel(pageModel);
cache.Set(cacheKey, page, new CacheItemPolicy());
return(page);
}
else
{
return(null);
}
}
}
/// <summary>
/// Adds Page model to cache, and returns cached object
/// </summary>
/// <param name="pageModel"></param>
/// <returns></returns>
public static Page Read(Rock.CMS.Page pageModel)
{
Page page = Page.CopyModel(pageModel);
string cacheKey = Page.CacheKey(pageModel.Id);
ObjectCache cache = MemoryCache.Default;
cache.Set(cacheKey, page, new CacheItemPolicy());
return(page);
}
/// <summary>
/// Retrieves an item from the current HTTPRequest items collection. This is useful to retrieve an object
/// that was saved by a previous block on the same page.
/// </summary>
/// <param name="key"></param>
/// <returns></returns>
public object GetSharedItem(string key)
{
string itemKey = string.Format("{0}:Item:{1}", Page.CacheKey(Id), key);
System.Collections.IDictionary items = HttpContext.Current.Items;
if (items.Contains(itemKey))
{
return(items[itemKey]);
}
return(null);
}
/// <summary>
/// Used to save an item to the current HTTPRequests items collection. This is useful if multiple blocks
/// on the same page will need access to the same object. The first block can read the object and save
/// it using this method for the other blocks to reference
/// </summary>
/// <param name="key"></param>
/// <param name="item"></param>
public void SaveSharedItem(string key, object item)
{
string itemKey = string.Format("{0}:Item:{1}", Page.CacheKey(Id), key);
System.Collections.IDictionary items = HttpContext.Current.Items;
if (items.Contains(itemKey))
{
items[itemKey] = item;
}
else
{
items.Add(itemKey, item);
}
}
/// <summary>
/// Removes page from cache
/// </summary>
/// <param name="id"></param>
public static void Flush(int id)
{
ObjectCache cache = MemoryCache.Default;
cache.Remove(Page.CacheKey(id));
}