| static private RemoveFromProvider ( string key, string providerName ) : void | ||
| key | string | |
| providerName | string | |
| return | void | |
// only used by providers
private static void DependencyRemovedCallback(string key, object value, CacheItemRemovedReason reason)
{
Debug.Trace("OutputCache", "DependencyRemovedCallback: reason=" + reason + ", key=" + key);
DependencyCacheEntry dce = value as DependencyCacheEntry;
if (dce.KernelCacheEntryKey != null)
{
// invalidate kernel cache entry
if (HttpRuntime.UseIntegratedPipeline)
{
UnsafeIISMethods.MgdFlushKernelCache(dce.KernelCacheEntryKey);
}
else
{
UnsafeNativeMethods.InvalidateKernelCache(dce.KernelCacheEntryKey);
}
}
if (reason == CacheItemRemovedReason.DependencyChanged)
{
if (dce.OutputCacheEntryKey != null)
{
try {
OutputCache.RemoveFromProvider(dce.OutputCacheEntryKey, dce.ProviderName);
}
catch (Exception e) {
HandleErrorWithoutContext(e);
}
}
}
}
// lookup cached vary
// lookup entry
// lookup entry for content-encoding
internal static Object Get(String key)
{
// if it's not in the provider or the default provider is undefined,
// check the internal cache (we don't know where it is).
Object result = null;
OutputCacheProvider provider = GetProvider(HttpContext.Current);
if (provider != null)
{
result = provider.Get(key);
OutputCacheEntry oce = result as OutputCacheEntry;
if (oce != null)
{
if (HasDependencyChanged(false /*isFragment*/, oce.DependenciesKey, oce.Dependencies, oce.KernelCacheUrl, key, provider.Name))
{
OutputCache.RemoveFromProvider(key, provider.Name);
#if DBG
Debug.Trace("OutputCache", "Get(" + key + ") --> null, " + provider.Name);
#endif
return(null);
}
result = Convert(oce);
}
}
if (result == null)
{
result = HttpRuntime.CacheInternal.Get(key);
#if DBG
string typeName = (result != null) ? result.GetType().Name : "null";
Debug.Trace("OutputCache", "Get(" + key + ") --> " + typeName + ", CacheInternal");
}
else
{
Debug.Trace("OutputCache", "Get(" + key + ") --> " + result.GetType().Name + ", " + provider.Name);
#endif
}
return(result);
}