Elixir Federation Demo

This repository is a demo of using Apollo Federation, Elixir Absinthe including the Absinthe Federation library.

This code is highly experimental. It's is just for fun. The resolvers are not ideal but in this state I just tried to make the queries running.

It's more about learning the federation principles and testing the Elixir lib. So far I found one issue regarding the :_resolve_reference field.

# resolve(&Resolvers.User.find/3)
      # raises ->
      # (FunctionClauseError) no function clause matching in Absinthe.Middleware.unshim/2
      #   (absinthe 1.6.5) lib/absinthe/middleware.ex:293: Absinthe.Middleware.unshim([{Absinthe.Middleware.Telemetry, []}, {{Absinthe.Resolution, :call}, &AccountsWeb.Resolvers.User.find/3}], AccountsWeb.Schema)

      # So we need to call the resolver in a anonymous function:
      resolve(fn _, args, _ -> Resolvers.User.find(nil, args, nil) end)

Run the configuration

The project runs in different tmux windows. You just have to run the ./startup.sh script.

This script lunches 5 tmux windows: 0:AccountsM 1:Inventory 2:Products 3:Reviews- 4:Apollo Gateway