Exploring Graphs with Elixir

Adding a Supervision Tree (or Two)

We want to build a supervision tree over the process graph. And we’ll want to use a dynamic supervision tree with a DynamicSupervisor so that we can stand up new nodes and tear them down on demand.

So that’s our supervision tree. But we’ll also want to manage a couple of agent processes for caching the node state and storing the graph as a whole. For these, we can set up a static supervision tree with a regular Supervisor.

We can set up both trees with the start/2 function in lib/graph_compute/application.ex. Let’s create that module now:

defmodule GraphCompute.Application do
  use Application

  # ...

end

And let’s add in our start/2 function:

apps/graph_compute/lib/graph_compute/application.ex ...