Subscription datafetcher access to websocket session

[richardbizik]

Hi, I am creating a graphql schema manually based on yaml configuration and available documents I already have a working /graphql endpoint however I would like to implement websocket support.
Schema gets create like so:

graphQLSchema = schemaGenerator.makeExecutableSchema(typeRegistry, RuntimeWiring.newRuntimeWiring()
                .scalar(ScalarTypes.ISODATE)
                .scalar(ScalarTypes.LONG)
                .scalar(ScalarTypes.JSON)
                .scalar(ScalarTypes.INTEGER)
                .type("QueryType", typeWiring -> typeWiring.dataFetchers(documentDataFetcherMap))
                .type("Subscription", typeWiring -> typeWiring.dataFetchers(subscriptionDataFetcherMap))
                .build());

and I am injecting it with

@Bean
public GraphQLSchema graphQLSchema(SchemaCreator schemaCreator) {
    return schemaCreator.getGraphQLSchema();
}

I would like to know if there is a way to access underlying websocket session and send the data to the user from my subscriptionDataFetchers preferably preserving functionality from this library (apollo ws protocol, etc)