private async ValueTask <ISourceStream> SubscribeAsync()
{
OperationContext operationContext = _operationContextPool.Get();
try
{
object?rootValue = RootValueResolver.TryResolve(
_requestContext,
_requestContext.Services,
_subscriptionType,
ref _cachedRootValue);
operationContext.Initialize(
_requestContext,
_requestContext.Services,
NoopBatchDispatcher.Default,
_requestContext.Operation !,
rootValue,
_requestContext.Variables !);
ResultMap resultMap = operationContext.Result.RentResultMap(1);
IPreparedSelection rootSelection = _rootSelections[0];
var middlewareContext = new MiddlewareContext();
middlewareContext.Initialize(
operationContext,
_rootSelections[0],
resultMap,
1,
rootValue,
Path.New(_rootSelections[0].ResponseName),
ImmutableDictionary <string, object?> .Empty);
ISourceStream sourceStream =
await rootSelection.Field.SubscribeResolver !.Invoke(middlewareContext)
.ConfigureAwait(false);
if (operationContext.Result.Errors.Count > 0)
{
throw new GraphQLException(operationContext.Result.Errors);
}
return(sourceStream);
}
finally
{
operationContext.Result.DropResult();
_operationContextPool.Return(operationContext);
}
}
public void Initialize(
IOperationContext operationContext,
IPreparedSelection selection,
ResultMap resultMap,
int responseIndex,
object?parent,
Path path,
IImmutableDictionary <string, object?> scopedContextData)
{
_operationContext = operationContext;
_selection = selection;
ResultMap = resultMap;
ResponseIndex = responseIndex;
_parent = parent;
Path = path;
ScopedContextData = scopedContextData;
LocalContextData = ImmutableDictionary <string, object?> .Empty;
Arguments = _selection.Arguments;
}