public LibrarySubscription(LibraryMessageService messageService)
{
Name = "Subscription";
AddField(new EventStreamFieldType
{
Name = "bookAdded",
Type = typeof(BookAddedMessageType),
Resolver = new FuncFieldResolver <BookAddedMessage>(c => c.Source as BookAddedMessage),
Subscriber = new EventStreamResolver <BookAddedMessage>(c => messageService.GetMessages())
});
}
public LibraryMutation(ILibraryService libraryService, LibraryMessageService messageService)
{
FieldAsync <BookType>(
name: "createBook",
description: "",
arguments: new QueryArguments(new QueryArgument <NonNullGraphType <BookInputType> > {
Name = "book"
}),
resolve: async context =>
{
var book = context.GetArgument <BookDto>("book");
var addedBook = await libraryService.AddBookAsync(book);
messageService.AddBookAddedMessage(addedBook);
return(addedBook);
});
}