public TEntity AddOrUpdate(TKey key, Func <TEntity> addViewFactory, Func <TEntity, TEntity> updateViewFactory,
AddOrUpdateHint hint)
{
string etag = null;
var blob = GetBlobReference(key);
TEntity view;
try
{
// atomic entities should be small, so we can use the simple method
var bytes = blob.DownloadByteArray();
using (var stream = new MemoryStream(bytes))
{
view = _strategy.Deserialize <TEntity>(stream);
}
view = updateViewFactory(view);
etag = blob.Attributes.Properties.ETag;
}
catch (StorageClientException ex)
{
switch (ex.ErrorCode)
{
case StorageErrorCode.ContainerNotFound:
var s = string.Format(
"Container '{0}' does not exist. You need to initialize this atomic storage and ensure that '{1}' is known to '{2}'.",
blob.Container.Name, typeof(TEntity).Name, _strategy.GetType().Name);
throw new InvalidOperationException(s, ex);
case StorageErrorCode.BlobNotFound:
case StorageErrorCode.ResourceNotFound:
view = addViewFactory();
break;
default:
throw;
}
}
// atomic entities should be small, so we can use the simple method
// http://toolheaven.net/post/Azure-and-blob-write-performance.aspx
using (var memory = new MemoryStream())
{
_strategy.Serialize(view, memory);
// note that upload from stream does weird things
var bro = etag != null
? new BlobRequestOptions {
AccessCondition = AccessCondition.IfMatch(etag)
}
: new BlobRequestOptions {
AccessCondition = AccessCondition.IfNoneMatch("*")
};
// make sure that upload is not rejected due to cashed content MD5
// http://social.msdn.microsoft.com/Forums/hu-HU/windowsazuredata/thread/4764e38f-b200-4efe-ada2-7de442dc4452
blob.Properties.ContentMD5 = null;
blob.UploadByteArray(memory.ToArray(), bro);
}
return(view);
}
public ProjectionInfo(IEnumerable <ViewInfo> views, object tempProjection, IDocumentStrategy strategy)
{
Condition.Requires(views, "views").IsNotNull();
Condition.Requires(tempProjection, "tempProjection").IsNotNull();
Condition.Requires(strategy, "strategy").IsNotNull();
this.ViewBuckets = views.Select(v => v.StoreBucket).ToArray();
var viewTypes = views.Select(v => v.EntityType);
var projectionType = tempProjection.GetType();
this.Hash = new ProjectionHash(projectionType, viewTypes, strategy.GetType());
this.ProjectionName = projectionType.Name;
this._checkpoint = new ProjectionCheckpoint();
this._tempProjection = tempProjection;
}