public async Task <List <Operation> > ProcessAsync(List <Operation> inputOps)
{
var outputOps = new List <Operation>();
var opIndex = 0;
OperationCode?lastAttemptedOperation = null; // used for error messages only
using (var transaction = await _dbContext.Database.BeginTransactionAsync())
{
try
{
foreach (var op in inputOps)
{
_jsonApiContext.BeginOperation();
lastAttemptedOperation = op.Op;
await ProcessOperation(op, outputOps);
opIndex++;
}
transaction.Commit();
return(outputOps);
}
catch (JsonApiException e)
{
transaction.Rollback();
throw new JsonApiException(e.GetStatusCode(), $"Transaction failed on operation[{opIndex}] ({lastAttemptedOperation}).", e);
}
catch (Exception e)
{
transaction.Rollback();
throw new JsonApiException(500, $"Transaction failed on operation[{opIndex}] ({lastAttemptedOperation}) for an unexpected reason.", e);
}
}
}
public async Task Invoke(HttpContext context, IJsonApiContext jsonApiContext)
{
if (IsValid(context))
{
// HACK: this currently results in allocation of
// objects that may or may not be used and even double allocation
// since the JsonApiContext is using field initializers
// Need to work on finding a better solution.
jsonApiContext.BeginOperation();
await _next(context);
}
}
public void ApplyFakeContext <T>(Controller controller) where T : class, IIdentifiable
{
_jsonApiContext.BeginOperation();
_jsonApiContext.ApplyContext <T>(controller);
}