Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / DataEntity / System / Data / Metadata / ObjectLayer / AssemblyCache.cs / 1305376 / AssemblyCache.cs
//---------------------------------------------------------------------- //// Copyright (c) Microsoft Corporation. All rights reserved. // // // @owner [....] // @backupOwner [....] //--------------------------------------------------------------------- using System.Collections.Generic; using System.Data.Common.Utils; using System.Diagnostics; using System.Reflection; namespace System.Data.Metadata.Edm { internal static class AssemblyCache { // Global Assembly Cache private readonly static Dictionarys_globalAssemblyCache = new Dictionary (); private static object _assemblyCacheLock = new object(); //List of assemblies having view gen attribute. We cache these things if we discover //these assemblies while looking for O-space metadata. private static IList s_viewGenAssemblies = new ThreadSafeList (); internal static LockedAssemblyCache AquireLockedAssemblyCache() { return new LockedAssemblyCache(_assemblyCacheLock, s_globalAssemblyCache); } internal static void LoadAssembly(Assembly assembly, bool loadReferencedAssemblies, KnownAssembliesSet knownAssemblies, out Dictionary typesInLoading, out List errors) { object loaderCookie = null; LoadAssembly(assembly, loadReferencedAssemblies, knownAssemblies, null, null, ref loaderCookie, out typesInLoading, out errors); } internal static void LoadAssembly(Assembly assembly, bool loadReferencedAssemblies, KnownAssembliesSet knownAssemblies, EdmItemCollection edmItemCollection, Action logLoadMessage, ref object loaderCookie, out Dictionary typesInLoading, out List errors) { Debug.Assert(loaderCookie == null || loaderCookie is Func , "This is a bad loader cookie"); typesInLoading = null; errors = null; using (LockedAssemblyCache lockedAssemblyCache = AssemblyCache.AquireLockedAssemblyCache()) { ObjectItemLoadingSessionData loadingData = new ObjectItemLoadingSessionData(knownAssemblies, lockedAssemblyCache, edmItemCollection, logLoadMessage, loaderCookie); LoadAssembly(assembly, loadReferencedAssemblies, loadingData); loaderCookie = loadingData.LoaderCookie; // resolve references to top level types (base types, navigation properties returns and associations, and complex type properties) loadingData.CompleteSession(); if (loadingData.EdmItemErrors.Count == 0) { // do the validation for the all the new types // Now, perform validation on all the new types EdmValidator validator = new EdmValidator(); validator.SkipReadOnlyItems = true; validator.Validate(loadingData.TypesInLoading.Values, loadingData.EdmItemErrors); // Update the global cache if there are no errors if (loadingData.EdmItemErrors.Count == 0) { if (ObjectItemAssemblyLoader.IsAttributeLoader(loadingData.ObjectItemAssemblyLoaderFactory)) { // we only cache items from the attribute loader globally, the // items loaded by convention will change depending on the cspace // provided. cspace will have a cache of it's own for assemblies UpdateCache(lockedAssemblyCache, loadingData.AssembliesLoaded); } else if (loadingData.EdmItemCollection != null && ObjectItemAssemblyLoader.IsConventionLoader(loadingData.ObjectItemAssemblyLoaderFactory)) { UpdateCache(loadingData.EdmItemCollection, loadingData.AssembliesLoaded); } } } if (loadingData.TypesInLoading.Count > 0) { foreach (EdmType edmType in loadingData.TypesInLoading.Values) { edmType.SetReadOnly(); } } // Update the out parameters once you are done with loading typesInLoading = loadingData.TypesInLoading; errors = loadingData.EdmItemErrors; } } private static void LoadAssembly(Assembly assembly, bool loadReferencedAssemblies, ObjectItemLoadingSessionData loadingData) { // Check if the assembly is already loaded KnownAssemblyEntry entry; bool shouldLoadReferences = false; if (loadingData.KnownAssemblies.TryGetKnownAssembly(assembly, loadingData.ObjectItemAssemblyLoaderFactory, loadingData.EdmItemCollection, out entry)) { shouldLoadReferences = !entry.ReferencedAssembliesAreLoaded && loadReferencedAssemblies; } else { ObjectItemAssemblyLoader loader = ObjectItemAssemblyLoader.CreateLoader(assembly, loadingData); loader.Load(); shouldLoadReferences = loadReferencedAssemblies; } if (shouldLoadReferences) { if (entry == null && loadingData.KnownAssemblies.TryGetKnownAssembly(assembly, loadingData.ObjectItemAssemblyLoaderFactory, loadingData.EdmItemCollection, out entry) || entry != null) { entry.ReferencedAssembliesAreLoaded = true; } Debug.Assert(entry != null, "we should always have an entry, why don't we?"); // We will traverse through all the statically linked assemblies and their dependencies. // Only assemblies with the EdmSchemaAttribute will be loaded and rest will be ignored // Even if the schema attribute is missing, we should still check all the dependent assemblies // any of the dependent assemblies can have the schema attribute // After the given assembly has been loaded, check on the flag in _knownAssemblies to see if it has already // been recursively loaded. The flag can be true if it was already loaded before this function was called foreach (Assembly referencedAssembly in MetadataAssemblyHelper.GetNonSystemReferencedAssemblies(assembly)) { // filter out "known" assemblies to prevent unnecessary loading EntityBid.Trace(" loadededAssembly='%ls'\n", referencedAssembly.FullName); // recursive call LoadAssembly(referencedAssembly, loadReferencedAssemblies, loadingData); } } } private static void UpdateCache(EdmItemCollection edmItemCollection, Dictionary assemblies) { foreach (var entry in assemblies) { edmItemCollection.ConventionalOcCache.AddAssemblyToOcCacheFromAssemblyCache( entry.Key, new ImmutableAssemblyCacheEntry(entry.Value)); } } private static void UpdateCache(LockedAssemblyCache lockedAssemblyCache, Dictionary assemblies) { foreach (KeyValuePair entry in assemblies) { // Add all the assemblies from the loading context to the global cache lockedAssemblyCache.Add(entry.Key, new ImmutableAssemblyCacheEntry(entry.Value)); } } internal static IList ViewGenerationAssemblies { get { return s_viewGenAssemblies; } } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007.
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