Raven.Light.Persistence.StorageActions.EnsureEtagMatches C# (CSharp) Method

EnsureEtagMatches() private method

private EnsureEtagMatches ( string key, System.Guid etag ) : bool
key string
etag System.Guid
return bool
		private bool EnsureEtagMatches(string key, Guid? etag)
		{
			var readResult = Storage.Documents.Read(key);
			if (readResult == null)
				return false;

			if(etag != null)
			{
				var existingEtag = new Guid(readResult.Key.Value<byte[]>("etag"));
				if(existingEtag != etag.Value)
					throw new ConcurrencyException("Could not delete " + key + " because it is already modified");
			}
			return true;
		}