/// <summary>
/// Removes all items from the cache with
/// a certain prefix in the key.
/// </summary>
/// <param name="group">The group.</param>
public virtual void RemoveAll(
CacheItemGroup group )
{
lock ( thisLock )
{
if ( backend != null )
{
backend.RemoveAll( group );
}
}
}
// ------------------------------------------------------------------
/// <summary>
/// Shortcut for checking whether invalid.
/// </summary>
/// <param name="group">The group.</param>
/// <returns>
/// <c>true</c> if [is null or empty] [the specified group]; otherwise, <c>false</c>.
/// </returns>
public static bool IsNullOrEmpty(
CacheItemGroup group )
{
return group == null || group.IsEmpty;
}
/// <summary>
/// Removes all items from the cache with
/// a certain prefix in the key.
/// </summary>
/// <param name="group">The group name of the keys to remove. If the
/// prefix is NULL or empty, the complete cache is emptied.</param>
public void RemoveAll(
CacheItemGroup group )
{
lock ( thisLock )
{
if ( CacheItemGroup.IsNullOrEmpty( group ) )
{
int count = inMemoryCache.Count;
if ( count > 0 )
{
LogCentral.Current.LogDebug(
string.Format(
@"[Cache] About to removed {0} cache items at '{1}', " +
@"ignoring their keys. The items follow:",
count,
DateTime.Now ) );
int index = 1;
foreach ( string key in inMemoryCache.Keys )
{
LogCentral.Current.LogDebug(
string.Format(
@"[Cache] Item {0} to remove: key = '{1}', " +
@"value = '{2}'.",
index + 1,
key,
inMemoryCache[key].Dump() ) );
index++;
}
}
// Cleaning all.
inMemoryCache.Clear();
if ( count > 0 )
{
LogCentral.Current.LogDebug(
string.Format(
@"[Cache] Removed {0} cache items, ignoring their keys.",
count ) );
}
}
else
{
List<string> keysToRemove = new List<string>();
string groupName = group.Name;
foreach ( string key in inMemoryCache.Keys )
{
SimpleCacheItemInformation itemInfo =
inMemoryCache[key];
if ( !CacheItemGroup.IsNullOrEmpty( group ) &&
itemInfo != null )
{
CacheItemGroup g = itemInfo.Group;
if ( !CacheItemGroup.IsNullOrEmpty( g ) &&
g.Name.StartsWith( groupName,
StringComparison.InvariantCultureIgnoreCase ) )
{
keysToRemove.Add( key );
}
}
}
foreach ( string key in keysToRemove )
{
LogCentral.Current.LogDebug(
string.Format(
@"[Cache] About to remove cache item at '{0}' with: " +
@"key = '{1}', value = '{2}'.",
DateTime.Now,
key,
inMemoryCache[key].Dump() ) );
inMemoryCache.Remove( key );
}
}
}
}