private static EntityContents GetEntityContents(SPWeb web, string containerTitle, Guid entityId)
{
SPList list;
SPFolder folder;
if (SPDocumentStoreHelper.TryGetFolderFromPath(web, containerTitle, out list, out folder, String.Empty) == false)
{
return(null);
}
SPFile defaultEntityPart;
if (SPDocumentStoreHelper.TryGetDocumentStoreDefaultEntityPart(list, folder, entityId, out defaultEntityPart) == false)
{
return(null);
}
EntityContents entityContents = SPDocumentStoreHelper.GetEntityContentsEntityPart(web, list, defaultEntityPart.ParentFolder);
if (entityContents == null)
{
throw new NotImplementedException(); // TODO: Build it, update the hash yada yada.
}
return(entityContents);
}
public override Entity GetEntity(string containerTitle, Guid entityId, string path)
{
//Get a new web in case we're executing in elevated permissions.
using (var site = new SPSite(this.DocumentStoreUrl))
{
using (var web = site.OpenWeb())
{
var contentsHash = SPDocumentStoreHelper.GetEntityContentsHash(web, containerTitle, entityId);
//If the contents hash is not set, fall back on just retrieving the entity.
if (String.IsNullOrEmpty(contentsHash))
{
return(base.GetEntity(containerTitle, entityId, path));
}
//If we found it in the cache, return the entity value.
var cachedValue = HttpRuntime.Cache[EntityContentsCachePrefix + "_" + entityId + "_" + contentsHash];
if (cachedValue is EntityContents)
{
var cachedEntityContents = cachedValue as EntityContents;
//If it hasn't changed, return a clone of the entity.
if (cachedEntityContents.Entity.ContentsETag == contentsHash)
{
return(DocumentStoreHelper.CloneObject(cachedEntityContents.Entity));
}
}
EntityContents entityContents = GetEntityContents(web, containerTitle, entityId);
HttpRuntime.Cache.Add(EntityContentsCachePrefix + "_" + entityId + "_" + contentsHash,
entityContents,
null,
Cache.NoAbsoluteExpiration,
CacheSlidingExpiration,
CacheItemPriority.Normal,
null);
return(DocumentStoreHelper.CloneObject(entityContents.Entity));
}
}
}
