public override Task <IList <TableResult> > ExecuteMirrorBatchAsync(
TableBatchOperation originalBatch, IList <TableResult> originalResponse,
TableRequestOptions requestOptions = null, OperationContext operationContext = null)
{
ChainTableUtils.GetBatchPartitionKey(originalBatch); // For validation; result ignored
// Copy the table. Entities are aliased to the original table, so don't mutate them.
var tmpTable = new SortedDictionary <PrimaryKey, DynamicTableEntity>(table);
int tmpNextEtag = nextEtag;
var results = new List <TableResult>();
for (int i = 0; i < originalBatch.Count; i++)
{
TableOperation op = originalBatch[i];
TableOperationType opType = op.GetOperationType();
ITableEntity passedEntity = op.GetEntity();
PrimaryKey key = passedEntity.GetPrimaryKey();
DynamicTableEntity oldEntity = tmpTable.GetValueOrDefault(key);
DynamicTableEntity newEntity = null;
HttpStatusCode statusCode = HttpStatusCode.NoContent;
if (opType == TableOperationType.Insert)
{
if (oldEntity != null)
{
throw ChainTableUtils.GenerateBatchException(HttpStatusCode.Conflict, i);
}
else
{
newEntity = ChainTableUtils.CopyEntity <DynamicTableEntity>(passedEntity);
statusCode = HttpStatusCode.Created;
}
}
else if (opType == TableOperationType.InsertOrReplace)
{
newEntity = ChainTableUtils.CopyEntity <DynamicTableEntity>(passedEntity);
}
else if (opType == TableOperationType.InsertOrMerge)
{
if (oldEntity == null)
{
newEntity = ChainTableUtils.CopyEntity <DynamicTableEntity>(passedEntity);
}
else
{
newEntity = ChainTableUtils.CopyEntity <DynamicTableEntity>(oldEntity);
Merge(newEntity, passedEntity);
}
}
else if (opType == TableOperationType.Delete &&
passedEntity.ETag == ChainTable2Constants.ETAG_DELETE_IF_EXISTS)
{
tmpTable.Remove(key);
}
else if (oldEntity == null)
{
throw ChainTableUtils.GenerateBatchException(HttpStatusCode.NotFound, i);
}
else if (string.IsNullOrEmpty(passedEntity.ETag))
{
// Enforce this because real Azure table will.
// XXX Ideally do this up front.
throw new ArgumentException(string.Format("Operation {0} requires an explicit ETag.", i));
}
else if (passedEntity.ETag != ChainTable2Constants.ETAG_ANY &&
oldEntity.ETag != passedEntity.ETag)
{
throw ChainTableUtils.GenerateBatchException(HttpStatusCode.PreconditionFailed, i);
}
else if (opType == TableOperationType.Delete)
{
tmpTable.Remove(key);
}
else if (opType == TableOperationType.Replace)
{
newEntity = ChainTableUtils.CopyEntity <DynamicTableEntity>(passedEntity);
}
else if (opType == TableOperationType.Merge)
{
newEntity = ChainTableUtils.CopyEntity <DynamicTableEntity>(oldEntity);
Merge(newEntity, passedEntity);
}
else
{
// IChainTable2 does not allow Retrieve in a batch.
throw new NotImplementedException();
}
if (newEntity != null)
{
newEntity.ETag = (originalResponse != null) ? originalResponse[i].Etag : (tmpNextEtag++).ToString();
newEntity.Timestamp = DateTimeOffset.MinValue; // Arbitrary, deterministic
tmpTable[key] = newEntity;
}
results.Add(new TableResult {
Result = passedEntity,
HttpStatusCode = (int)statusCode,
Etag = (newEntity != null) ? newEntity.ETag : null,
});
}
// If we got here, commit.
table = tmpTable;
nextEtag = tmpNextEtag;
for (int i = 0; i < originalBatch.Count; i++)
{
if (results[i].Etag != null) // not delete
{
originalBatch[i].GetEntity().ETag = results[i].Etag;
}
}
return(Task.FromResult((IList <TableResult>)results));
}