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);
}
}
private async Task <IReadOnlyQueryResult> OnEvent(object payload)
{
using IServiceScope serviceScope = _requestContext.Services.CreateScope();
IServiceProvider eventServices = serviceScope.ServiceProvider;
IBatchDispatcher dispatcher = eventServices.GetRequiredService <IBatchDispatcher>();
OperationContext operationContext = _operationContextPool.Get();
try
{
var scopedContext = ImmutableDictionary <string, object?> .Empty
.SetItem(WellKnownContextData.EventMessage, payload);
object?rootValue = RootValueResolver.TryResolve(
_requestContext,
eventServices,
_subscriptionType,
ref _cachedRootValue);
operationContext.Initialize(
_requestContext,
eventServices,
dispatcher,
_requestContext.Operation !,
rootValue,
_requestContext.Variables !);
return(await _queryExecutor.ExecuteAsync(operationContext, scopedContext)
.ConfigureAwait(false));
}
finally
{
_operationContextPool.Return(operationContext);
}
}