Ejemplo n.º 1
0
        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);
        }
Ejemplo n.º 2
0
        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;
        }