Best way to reference multiple interdependent processes

Questions / Help
1

Hello all,
I am working on a supervisor that will supervise three interdependent processes; say A, B and C. B depends on A and C depends on B. These processes will likely live and die together, so they will be restarted together. I will run multiple copies of such supervisor, each ow which will run its three sons.

I can easily start and supervise them, but my question is: what is the idiomatic way so that B knows about A and C knows about B? Should just I register them with a local name, so that supervisor{ā€œ123ā€} runs A{ā€œ123ā€}, B{ā€œ123ā€} and C{ā€œ123ā€}, and each of them looks up its sibilings by name? Or is there something clearer?

2

Supervisors are only about supervising children not for aiding the communication between children. So yes you want to use some strategy of registering processes to a registry.

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3

Not sure if I am misreading but Iā€™d go for:

  1. Use a Registry with your own naming scheme, e.g. MyApp.XyzSupervisor.Instance123.WorkerA so you can always identify the A/B/C processes (so yes you are on the right path)
  2. Have a GenServer that accepts one message and then distributes work to the A/B/C workers
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