Craft GraphQL APIs in Elixir with Absinthe

Setting Up Subscriptions

Subscriptions let a client submit a GraphQL document that, instead of being executed immediately, is executed on the basis of some event in the system. From the perspective of the server, we need to be able to hold onto documents that clients have submitted so that we can run them at the right time, and we need a way to propagate events through the system. Finally, we need a way to have a persistent connection with the client so that we can push results up to them when their documents are executed.

This requires a little bit of setup. Fortunately, PlateSlate already has Phoenix as a dependency, and that will play the role of the publish-subscribe^[22] and WebSocket system. This provides a number of handy features for ...