public void Insert(string key, object value, KeyCacheDependency dependencies, DateTime absoluteExpiration)
{
foreach (var cacheProvider in cacheProviders)
{
cacheProvider.Insert(key, value, dependencies, absoluteExpiration);
}
}
public void Insert(string key, object value, KeyCacheDependency dependencies)
{
foreach (var cacheProvider in cacheProviders)
{
cacheProvider.Insert(key, value, dependencies);
}
}
/// <summary>
/// A method that actually inserts the cache entry.
/// </summary>
private void PerformInsert(string key, object value, KeyCacheDependency dependencies,
DateTime?absoluteExpiration)
{
InvalidateDependencies(key);
var entry = new CacheEntry(value, dependencies, absoluteExpiration);
Client.Insert(key, entry, absoluteExpiration);
UpdateDependencies(key, dependencies);
}
/// <summary>
/// Updates dependencies for a specified key. Adding a dependency
/// to a key will remove this key from the cache every time any of
/// the dependant keys is updated or removed from cache.
/// </summary>
private void UpdateDependencies(string key, KeyCacheDependency dependencies)
{
if (dependencies == null)
{
return;
}
foreach (var dependency in dependencies)
{
var dependenciesKey = CreateDependenciesKey(dependency);
var dependants = Client.Get(dependenciesKey) as HashSet <string>;
if (dependants == null)
{
dependants = new HashSet <string>();
}
// Add the parent key to dependencies of the dependant
// key so we can efficiently find keys that need to be
// invalidated when updating cache entries.
dependants.Add(key);
Client.Insert(dependenciesKey, dependants, null);
}
}
public void Insert(string key, object value, KeyCacheDependency dependencies,
DateTime absoluteExpiration)
{
PerformInsert(key, value, dependencies, absoluteExpiration);
}
public void Insert(string key, object value, KeyCacheDependency dependencies)
{
PerformInsert(key, value, dependencies, null);
}
public CacheEntry(object value, KeyCacheDependency dependencies, DateTime?absoluteExpiration)
{
Value = value;
Dependencies = dependencies;
AbsoluteExpiration = absoluteExpiration;
}
