/// <summary>
/// Adds new CacheItem to cache. If another item already exists with the same key, that item is removed before
/// the new item is added. If any failure occurs during this process, the cache will not contain the item being added.
/// </summary>
/// <param name="key">Identifier for this CacheItem</param>
/// <param name="value">Value to be stored in cache. May be null.</param>
/// <param name="scavengingPriority">Specifies the new item's scavenging priority.
/// See <see cref="CacheItemPriority"/> for more information.</param>
/// <param name="refreshAction">Object provided to allow the cache to refresh a cache item that has been expired. May be null.</param>
/// <param name="expirations">Param array specifying the expiration policies to be applied to this item. May be null or omitted.</param>
/// <exception cref="ArgumentNullException">Provided key is null</exception>
/// <exception cref="ArgumentException">Provided key is an empty string</exception>
/// <remarks>The CacheManager can be configured to use different storage mechanisms in which to store the CacheItems.
/// Each of these storage mechanisms can throw exceptions particular to their own implementations.</remarks>
public void Add(string key, object value, CacheItemPriority scavengingPriority, ICacheItemRefreshAction refreshAction, params ICacheItemExpiration[] expirations)
{
System.Runtime.Caching.CacheItemPriority cacheItemPriority = System.Runtime.Caching.CacheItemPriority.Default;
switch (scavengingPriority)
{
case CacheItemPriority.Normal:
cacheItemPriority = System.Runtime.Caching.CacheItemPriority.Default;
break;
case CacheItemPriority.None:
case CacheItemPriority.Low:
case CacheItemPriority.NotRemovable:
cacheItemPriority = System.Runtime.Caching.CacheItemPriority.NotRemovable;
break;
}
DateTime absoluteExpiration = DateTime.Now.AddMinutes(Settings.Default.CacheAbsoluteExpirationMinutes);
TimeSpan slidingExpiration = TimeSpan.Zero;
if (expirations != null)
{
foreach (var expiration in expirations)
{
if (expiration.GetType().IsOfType <AbsoluteTime>())
{
absoluteExpiration = ((AbsoluteTime)expiration).ExpirationTime;
}
else if (expiration.GetType().IsOfType <NeverExpired>())
{
absoluteExpiration = DateTime.MaxValue;
}
else if (expiration.GetType().IsOfType <SlidingTime>())
{
slidingExpiration = ((SlidingTime)expiration).SlidingExpiration;
}
}
}
Cache.Add(key, value, new CacheItemPolicy
{
AbsoluteExpiration = absoluteExpiration,
SlidingExpiration = slidingExpiration,
Priority = cacheItemPriority,
RemovedCallback = args =>
{
CacheItemRemovedReason removalReason = CacheItemRemovedReason.Unknown;
switch (args.RemovedReason)
{
case System.Runtime.Caching.CacheEntryRemovedReason.ChangeMonitorChanged:
removalReason = CacheItemRemovedReason.DependencyChanged;
break;
case System.Runtime.Caching.CacheEntryRemovedReason.Expired:
removalReason = CacheItemRemovedReason.Expired;
break;
case System.Runtime.Caching.CacheEntryRemovedReason.Evicted:
removalReason = CacheItemRemovedReason.Scavenged;
break;
}
if (refreshAction != null)
{
refreshAction.Refresh(args.CacheItem.Key, args.CacheItem.Value, removalReason);
}
}
});
}
/// <summary>
/// Adds new CacheItem to cache. If another item already exists with the same key, that item is removed before
/// the new item is added. If any failure occurs during this process, the cache will not contain the item being added.
/// </summary>
/// <param name="key">Identifier for this CacheItem</param>
/// <param name="value">Value to be stored in cache. May be null.</param>
/// <param name="scavengingPriority">Specifies the new item's scavenging priority.
/// See <see cref="CacheItemPriority"/> for more information.</param>
/// <param name="refreshAction">Object provided to allow the cache to refresh a cache item that has been expired. May be null.</param>
/// <param name="expirations">Param array specifying the expiration policies to be applied to this item. May be null or omitted.</param>
/// <exception cref="ArgumentNullException">Provided key is null</exception>
/// <exception cref="ArgumentException">Provided key is an empty string</exception>
/// <remarks>The CacheManager can be configured to use different storage mechanisms in which to store the CacheItems.
/// Each of these storage mechanisms can throw exceptions particular to their own implementations.</remarks>
public void Add(string key, object value, CacheItemPriority scavengingPriority, ICacheItemRefreshAction refreshAction, params ICacheItemExpiration[] expirations)
{
System.Runtime.Caching.CacheItemPriority cacheItemPriority = System.Runtime.Caching.CacheItemPriority.Default;
switch (scavengingPriority)
{
case CacheItemPriority.Normal:
cacheItemPriority = System.Runtime.Caching.CacheItemPriority.Default;
break;
case CacheItemPriority.None:
case CacheItemPriority.Low:
case CacheItemPriority.NotRemovable:
cacheItemPriority = System.Runtime.Caching.CacheItemPriority.NotRemovable;
break;
}
DateTime absoluteExpiration = DateTime.Now.AddMinutes(Settings.Default.CacheAbsoluteExpirationMinutes);
TimeSpan slidingExpiration = TimeSpan.Zero;
if (expirations != null)
{
foreach (var expiration in expirations)
{
if (expiration.GetType().IsOfType<AbsoluteTime>())
{
absoluteExpiration = ((AbsoluteTime)expiration).ExpirationTime;
}
else if (expiration.GetType().IsOfType<NeverExpired>())
{
absoluteExpiration = DateTime.MaxValue;
}
else if (expiration.GetType().IsOfType<SlidingTime>())
{
slidingExpiration = ((SlidingTime)expiration).SlidingExpiration;
}
}
}
Cache.Add(key, value, new CacheItemPolicy
{
AbsoluteExpiration = absoluteExpiration,
SlidingExpiration = slidingExpiration,
Priority = cacheItemPriority,
RemovedCallback = args =>
{
CacheItemRemovedReason removalReason = CacheItemRemovedReason.Unknown;
switch (args.RemovedReason)
{
case System.Runtime.Caching.CacheEntryRemovedReason.ChangeMonitorChanged:
removalReason = CacheItemRemovedReason.DependencyChanged;
break;
case System.Runtime.Caching.CacheEntryRemovedReason.Expired:
removalReason = CacheItemRemovedReason.Expired;
break;
case System.Runtime.Caching.CacheEntryRemovedReason.Evicted:
removalReason = CacheItemRemovedReason.Scavenged;
break;
}
if (refreshAction != null)
refreshAction.Refresh(args.CacheItem.Key, args.CacheItem.Value, removalReason);
}
});
}
