/// <summary>
/// Loads structured data for all entities of the specified type(s).
/// The 'Entities' are interpreted as the types.
/// </summary>
/// <param name="request">The description of fields and related entities to load.</param>
/// <returns>All instances of type 'entityType', and optionally all instances of types that derive from 'entityType'.</returns>
public static IEnumerable <EntityData> GetEntities(EntityRequest request)
{
IEnumerable <EntityData> result;
// Ensure cache is ready
if (_securedResultCache == null)
{
_securedResultCache = Factory.Current.ResolveNamed <ICache <CachingBulkRequestRunnerKey, IEnumerable <EntityData> > >("BulkRequestRunner Secured Result");
}
// Check request
if (ShouldCacheAsMetadata(request))
{
// Don't use the bulk request runner result cache when we're using the metadata cache.
request.IgnoreResultCache = true;
CachingBulkRequestRunnerKey key = CachingBulkRequestRunnerKey.Create(request);
_securedResultCache.TryGetOrAdd(key, out result, key1 =>
{
return(GetEntitiesRouteRequest(request));
});
}
else
{
result = GetEntitiesRouteRequest(request);
}
return(result);
}
/// <summary>
/// Execute a request for bulk data from the SQL database.
/// </summary>
/// <param name="request">The requested data</param>
/// <returns></returns>
public BulkRequestResult GetBulkResult(EntityRequest request)
{
if (request == null)
{
throw new ArgumentNullException("request");
}
// Bypass cache
if (request.IgnoreResultCache)
{
return(CreateResult(request));
}
BulkRequestResult result;
CachingBulkRequestRunnerValue cacheValue;
CachingBulkRequestRunnerKey key = CachingBulkRequestRunnerKey.Create(request);
// Check cache
bool inCache = Cache.TryGetValue(key, out cacheValue);
// Should parent cache contexts be notified of invalidations
// .. no for now, for compatibility with previous system. Consider changing
bool notifyParentCacheContext = false;
if (!inCache)
{
using (var cacheContext = new CacheContext(notifyParentCacheContext ? ContextType.New : ContextType.Detached)) // Detached for now..
{
result = CreateResult(request);
cacheValue = new CachingBulkRequestRunnerValue(result);
Cache.Add(key, cacheValue);
// Add the cache context entries to the appropriate CacheInvalidator
cacheContext.Entities.Add(result.AllEntities.Keys);
cacheContext.EntityInvalidatingRelationshipTypes.Add(GetRelationshipTypesUsed(result));
_cacheInvalidator.AddInvalidations(cacheContext, key);
}
}
else
{
if (notifyParentCacheContext && CacheContext.IsSet( ))
{
using (CacheContext cacheContext = new CacheContext(ContextType.Attached))
{
// Add the already stored changes that should invalidate this cache
// entry to any outer or containing cache contexts.
cacheContext.AddInvalidationsFor(_cacheInvalidator, key);
}
}
}
result = cacheValue.BulkRequestResult;
request.ResultFromCache = inCache; // TODO: Find a better channel to return this info. (It can't be in the response, because that's cached)
return(result);
}
