/// <summary>
///
/// </summary>
/// <param name="invocation"></param>
/// <param name="cacheItemProperty"></param>
/// <returns></returns>
private string getKey(IInvocation invocation, CacheItemPropertiesAttribute cacheItemProperty)
{
StringBuilder sb = new StringBuilder();
sb.AppendFormat("cache://{0}", cacheItemProperty.SlotName);
foreach (object argument in invocation.Request.Arguments)
{
if (argument is PagerInfo)
{
var hashtable = ((PagerInfo)argument).Filters;
var keys = hashtable.Keys.Cast <string>().OrderBy(x => x);
foreach (string entry in keys)
{
sb.AppendFormat("/{0}={1}", entry, hashtable[entry]);
}
}
else
{
sb.AppendFormat("/{0}", argument);
}
}
sb.Append("/");
return(sb.ToString());
}
public void Intercept(IInvocation invocation)
{
IEnumerable <object> clearCacheItems = null;
IEnumerable <object> clearCacheItemsStarWith = null;
object[] attrs = invocation.Request.Method.GetCustomAttributes(typeof(BaseCacheAttribute), true);
object cacheItems = attrs.SingleOrDefault(x => x.GetType().Name == "CacheItemPropertiesAttribute");
if (cacheItems == null)
{
clearCacheItems =
attrs.Where(x => x.GetType().Name == "ClearCacheItemPropertiesAttribute").AsEnumerable();
clearCacheItemsStarWith =
attrs.Where(x => x.GetType().Name == "ClearCacheKeysStartingWithAttribute").AsEnumerable();
}
if (attrs.Length == 0)
{
invocation.Proceed();
return;
}
if (cacheItems != null)
{
BaseCacheAttribute cacheItemProperty = cacheItems as BaseCacheAttribute;
ICache appCache = CacheManager.GetCache();
CacheItemPropertiesAttribute cacheItemProperties = cacheItemProperty as CacheItemPropertiesAttribute;
string key = getKey(invocation, cacheItemProperties);
if (appCache.Get(key) == null)
{
invocation.Proceed();
DateTime cacheTimeSpan =
DateTime.Now.AddMinutes(cacheItemProperties.PermissionCacheMinutes > 0
? cacheItemProperties.PermissionCacheMinutes
: 60);
appCache.Add(key, cacheTimeSpan, invocation.ReturnValue);
}
else
{
invocation.ReturnValue = appCache.Get(key);
}
}
if (clearCacheItems != null)
{
foreach (object attr in clearCacheItems)
{
BaseCacheAttribute cacheItemProperty = attr as BaseCacheAttribute;
ICache appCache = CacheManager.GetCache();
string key = getClearKey(invocation, cacheItemProperty as ClearCacheItemPropertiesAttribute);
string[] keys = appCache.GetKeys();
keys.Where(x => x.Contains(key)).ToList().ForEach(appCache.InvalidateCacheItem);
appCache.InvalidateCacheItem(key);
}
invocation.Proceed();
}
if (clearCacheItemsStarWith != null)
{
foreach (object attr in clearCacheItemsStarWith)
{
BaseCacheAttribute cacheItemProperty = attr as BaseCacheAttribute;
ICache appCache = CacheManager.GetCache();
string key = getClearKeyStartsWith(cacheItemProperty as ClearCacheKeysStartingWithAttribute);
string[] keys = appCache.GetKeys();
List <string> cacheItemsRemoved = keys.Where(x => x.StartsWith(key)).ToList();
foreach (string item in cacheItemsRemoved)
{
appCache.InvalidateCacheItem(item);
}
}
}
}
