/// <summary>
/// Gets an item from cache, and if not found, executes the itemFactory to create item and add to cache with an expiration timespan.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="region">The region.</param>
/// <param name="itemFactory">The item factory.</param>
/// <param name="expiration">The expiration.</param>
/// <returns></returns>
public static object GetOrAddExisting(string key, string region, Func <object> itemFactory, TimeSpan expiration)
{
var args = new RockCacheGetOrAddExistingArgs
{
Key = key,
Region = region,
ItemFactory = itemFactory,
Expiration = expiration,
AllowCacheBypass = false
};
return(GetOrAddExisting(args));
}
/// <summary>
/// Gets an item from cache using the specified key. If allowCacheBypass is true the CACHE_CONTROL_COOKIE will be
/// inspected to see if cached value should be ignored.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="allowCacheBypass">if set to <c>true</c> the cache can be ignored based on the cache control cookie.</param>
/// <returns></returns>
public static object Get(string key, bool allowCacheBypass)
{
var args = new RockCacheGetOrAddExistingArgs
{
Key = key,
Region = null,
ItemFactory = null,
Expiration = TimeSpan.MaxValue,
AllowCacheBypass = allowCacheBypass
};
return(GetOrAddExisting(args));
}
/// <summary>
/// Gets or adds an item from cache using the specified args. If allowCacheBypass is true the CACHE_CONTROL_COOKIE will be
/// inspected to see if cached value should be ignored.
/// </summary>
/// <param name="args">The arguments.</param>
/// <returns></returns>
public static object GetOrAddExisting(RockCacheGetOrAddExistingArgs args)
{
if (args.AllowCacheBypass && System.Web.HttpContext.Current != null)
{
var isCachedEnabled = System.Web.HttpContext.Current.Request.Cookies.Get(CACHE_CONTROL_COOKIE);
if (isCachedEnabled != null && !isCachedEnabled.Value.AsBoolean())
{
return(null);
}
}
var value = args.Region.IsNotNullOrWhiteSpace() ?
RockCacheManager <object> .Instance.Get(args.Key, args.Region) :
RockCacheManager <object> .Instance.Get(args.Key);
if (value != null)
{
return(value);
}
if (args.ItemFactory == null)
{
return(null);
}
value = args.ItemFactory();
if (value == null)
{
return(null);
}
if (args.Region.IsNotNullOrWhiteSpace())
{
RockCacheManager <object> .Instance.AddOrUpdate(args.Key, args.Region, value, args.Expiration);
}
else
{
RockCacheManager <object> .Instance.AddOrUpdate(args.Key, value, args.Expiration);
}
return(value);
}
