public async Task ExecuteOperationFieldAsync()
{
try {
if (_mappedOpField.Field.OnExecuting(_requestContext, out var args) && args.Skip)
{
Result = DBNull.Value; // it's a signal to skip value in output
return;
}
var opFieldContext = new FieldContext(_requestContext, this, _mappedOpField);
opFieldContext.SetCurrentParentScope(_parentScope);
// We do not save result in parent top-level context: we maybe executing in parallel with other top-level fields;
// we need synchronization(lock), and also op fields might finish out of order. So we save result in a field, and
// RequestHandler will save all results from executers in proper order.
//_parentScope.SetValue(_mappedOpField.Field.Key, opOutValue); -- do not do this
this.Result = await InvokeResolverAsync(opFieldContext);
// for fields returning objects, save for further processing of results
if (opFieldContext.MappedField.Field.SelectionSubset != null)
{
_executedObjectFieldContexts.Add(opFieldContext);
}
// process object field results until no more
while (_executedObjectFieldContexts.Count > 0)
{
if (_requestContext.CancellationToken.IsCancellationRequested)
{
opFieldContext.ThrowRequestCancelled();
}
// save current list, create new one in the field
var oldFieldContexts = _executedObjectFieldContexts;
_executedObjectFieldContexts = new List <FieldContext>();
foreach (var fldCtx in oldFieldContexts)
{
await ExecuteFieldSelectionSubsetAsync(fldCtx);
}
}//while
} finally {
// notify resolvers about end request
if (_resolverInstances.Count > 0)
{
foreach (var resObj in _resolverInstances)
{
(resObj as IResolverClass)?.EndRequest(_requestContext);
}
}
}
}
public async Task ExecuteOperationFieldAsync()
{
try {
var opFieldContext = new FieldContext(_requestContext, this, _operationField, _fieldIndex);
opFieldContext.CurrentScope = _parentScope;
var result = await InvokeResolverAsync(opFieldContext);
var opOutValue = opFieldContext.ConvertToOuputValue(result);
_parentScope.SetValue(_fieldIndex, opOutValue);
// for fields returning objects, save for further processing of results
if (opFieldContext.Flags.IsSet(FieldFlags.ReturnsComplexType))
{
_executedObjectFieldContexts.Add(opFieldContext);
}
// process object field results until no more
while (_executedObjectFieldContexts.Count > 0)
{
if (_requestContext.CancellationToken.IsCancellationRequested)
{
opFieldContext.ThrowRequestCancelled();
}
// save current list, create new one in the field
var oldFieldContexts = _executedObjectFieldContexts;
_executedObjectFieldContexts = new List <FieldContext>();
foreach (var fldCtx in oldFieldContexts)
{
await ExecuteFieldSelectionSubsetAsync(fldCtx);
}
}//while
} finally {
// notify resolvers about end request
if (_resolverInstances.Count > 0)
{
foreach (var resObj in _resolverInstances)
{
(resObj as IResolverClass)?.EndRequest(_requestContext);
}
}
}
}