Add a Supervision Tree

Our plan

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

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

The GraphCompute.Appliation module

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