NewFactory creates a new factory for the GraphQL datasource planner Graphql Datasource could be stateful in case you are using subscriptions, make sure you are using the same execution context for all datasources.

websocket sub-protocol: https://github.com/enisdenjo/graphql-ws/blob/master/PROTOCOL.md.

websocket sub-protocol: https://github.com/apollographql/subscriptions-transport-ws/blob/master/PROTOCOL.md.

GraphQLSubscriptionClientFactory abstracts the way of creating a new GraphQLSubscriptionClient.