internal static object GetFragment(string key, string providerName)
{
object obj2 = null;
OutputCacheProvider fragmentProvider = GetFragmentProvider(providerName);
if (fragmentProvider != null)
{
obj2 = fragmentProvider.Get(key);
PartialCachingCacheEntry entry = obj2 as PartialCachingCacheEntry;
if ((entry != null) && HasDependencyChanged(true, entry._dependenciesKey, entry._dependencies, null, key, fragmentProvider.Name))
{
RemoveFragment(key, fragmentProvider.Name);
return(null);
}
}
if (obj2 == null)
{
obj2 = HttpRuntime.CacheInternal.Get(key);
}
return(obj2);
}
// lookup fragment
internal static Object GetFragment(String key, String providerName)
{
// if providerName is null, use default provider.
// if providerName is not null, get it from the provider collection.
// 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 = GetFragmentProvider(providerName);
if (provider != null)
{
result = provider.Get(key);
PartialCachingCacheEntry fragment = result as PartialCachingCacheEntry;
if (fragment != null)
{
if (HasDependencyChanged(true /*isFragment*/, fragment._dependenciesKey, fragment._dependencies, null /*kernelKey*/, key, provider.Name))
{
OutputCache.RemoveFragment(key, provider.Name);
#if DBG
Debug.Trace("OutputCache", "GetFragment(" + key + "," + providerName + ") --> null, " + providerName);
#endif
return(null);
}
}
}
if (result == null)
{
result = HttpRuntime.CacheInternal.Get(key);
#if DBG
string typeName = (result != null) ? result.GetType().Name : "null";
Debug.Trace("OutputCache", "GetFragment(" + key + "," + providerName + ") --> " + typeName + ", CacheInternal");
}
else
{
Debug.Trace("OutputCache", "GetFragment(" + key + "," + providerName + ") --> " + result.GetType().Name + ", " + providerName);
#endif
}
return(result);
}
// insert fragment
internal static void InsertFragment(String cachedVaryKey, ControlCachedVary cachedVary,
String fragmentKey, PartialCachingCacheEntry fragment,
CacheDependency dependencies,
DateTime absExp, TimeSpan slidingExp,
String providerName)
{
// if providerName is not null, find the provider in the collection.
// if providerName is null, use default provider.
// if the default provider is undefined or the fragment can't be inserted in the
// provider, insert it in the internal cache.
OutputCacheProvider provider = GetFragmentProvider(providerName);
//
// ControlCachedVary and PartialCachingCacheEntry can be serialized
//
bool useProvider = (provider != null);
if (useProvider)
{
bool canUseProvider = (slidingExp == Cache.NoSlidingExpiration &&
(dependencies == null || dependencies.IsFileDependency()));
if (useProvider && !canUseProvider)
{
throw new ProviderException(SR.GetString(SR.Provider_does_not_support_policy_for_fragments, providerName));
}
}
#if DBG
bool cachedVaryPutInCache = (cachedVary != null);
#endif
if (cachedVary != null)
{
// Add the ControlCachedVary item so that a request will know
// which varies are needed to issue another request.
// Use the Add method so that we guarantee we only use
// a single ControlCachedVary and don't overwrite existing ones.
ControlCachedVary cachedVaryInCache;
if (!useProvider)
{
cachedVaryInCache = OutputCache.UtcAdd(cachedVaryKey, cachedVary);
}
else
{
cachedVaryInCache = (ControlCachedVary)provider.Add(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
if (cachedVaryInCache != null)
{
if (!cachedVary.Equals(cachedVaryInCache))
{
// overwrite existing cached vary
if (!useProvider)
{
HttpRuntime.CacheInternal.UtcInsert(cachedVaryKey, cachedVary);
}
else
{
provider.Set(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
}
else
{
cachedVary = cachedVaryInCache;
#if DBG
cachedVaryPutInCache = false;
#endif
}
}
if (!useProvider)
{
AddCacheKeyToDependencies(ref dependencies, cachedVaryKey);
}
// not all caches support cache key dependencies, but we can use a "change number" to associate
// the ControlCachedVary and the PartialCachingCacheEntry
fragment._cachedVaryId = cachedVary.CachedVaryId;
}
// Now insert into the cache (use cache provider if possible, otherwise use internal cache)
if (!useProvider)
{
HttpRuntime.CacheInternal.UtcInsert(fragmentKey, fragment,
dependencies,
absExp, slidingExp,
CacheItemPriority.Normal,
null);
}
else
{
string depKey = null;
if (dependencies != null)
{
depKey = OUTPUTCACHE_KEYPREFIX_DEPENDENCIES + dependencies.GetUniqueID();
fragment._dependenciesKey = depKey;
fragment._dependencies = dependencies.GetFileDependencies();
}
provider.Set(fragmentKey, fragment, absExp);
if (dependencies != null)
{
// use Add and dispose dependencies if there's already one in the cache
Object d = HttpRuntime.CacheInternal.UtcAdd(depKey, new DependencyCacheEntry(fragmentKey, null, provider.Name),
dependencies,
absExp, Cache.NoSlidingExpiration,
CacheItemPriority.Normal, s_dependencyRemovedCallbackForFragment);
if (d != null)
{
dependencies.Dispose();
}
}
}
#if DBG
string cachedVaryType = (cachedVaryPutInCache) ? "ControlCachedVary" : "";
string providerUsed = (useProvider) ? provider.Name : "CacheInternal";
Debug.Trace("OutputCache", "InsertFragment("
+ cachedVaryKey + ", "
+ cachedVaryType + ", "
+ fragmentKey + ", PartialCachingCacheEntry, ...) -->"
+ providerUsed);
#endif
}
internal static void InsertFragment(string cachedVaryKey, ControlCachedVary cachedVary, string fragmentKey, PartialCachingCacheEntry fragment, CacheDependency dependencies, DateTime absExp, TimeSpan slidingExp, string providerName)
{
OutputCacheProvider fragmentProvider = GetFragmentProvider(providerName);
bool flag = fragmentProvider != null;
if (flag)
{
bool flag2 = (slidingExp == Cache.NoSlidingExpiration) && ((dependencies == null) || dependencies.IsFileDependency());
if (flag && !flag2)
{
throw new ProviderException(System.Web.SR.GetString("Provider_does_not_support_policy_for_fragments", new object[] { providerName }));
}
}
if (cachedVary != null)
{
ControlCachedVary vary;
if (!flag)
{
vary = UtcAdd(cachedVaryKey, cachedVary);
}
else
{
vary = (ControlCachedVary)fragmentProvider.Add(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
if (vary != null)
{
if (!cachedVary.Equals(vary))
{
if (!flag)
{
HttpRuntime.CacheInternal.UtcInsert(cachedVaryKey, cachedVary);
}
else
{
fragmentProvider.Set(cachedVaryKey, cachedVary, Cache.NoAbsoluteExpiration);
}
}
else
{
cachedVary = vary;
}
}
if (!flag)
{
AddCacheKeyToDependencies(ref dependencies, cachedVaryKey);
}
fragment._cachedVaryId = cachedVary.CachedVaryId;
}
if (!flag)
{
HttpRuntime.CacheInternal.UtcInsert(fragmentKey, fragment, dependencies, absExp, slidingExp, CacheItemPriority.Normal, null);
}
else
{
string key = null;
if (dependencies != null)
{
key = "aD" + dependencies.GetUniqueID();
fragment._dependenciesKey = key;
fragment._dependencies = dependencies.GetFileDependencies();
}
fragmentProvider.Set(fragmentKey, fragment, absExp);
if ((dependencies != null) && (HttpRuntime.CacheInternal.UtcAdd(key, new DependencyCacheEntry(fragmentKey, null, fragmentProvider.Name), dependencies, absExp, Cache.NoSlidingExpiration, CacheItemPriority.Normal, s_dependencyRemovedCallbackForFragment) != null))
{
dependencies.Dispose();
}
}
}
