Is it possible to share a Phoenix Pubsub with an external dependency?

By using the PubSub.PG2 adapter you can send messages across servers using distributed Elixir. You just need to connect the nodes. You can use the PG2 adapter by providing the adapter child spec option when you are starting the PubSub. For example if you start it with your application your start method in your application.ex file will look like this:

def start(_type, _args) do
    children = [
      {Phoenix.PubSub, name: MyApp.PubSub, adapter: Phoenix.PubSub.PG2},
    ]
    Supervisor.start_link(children, [])
end

Thank you for your response.

Could you please elaborate on some of the points?

What do you mean by “connect the nodes”?

Should the above code go in the phoenix app or the DiceGame app?

DiceGame Is probably a library, not an application…

If You created it with --sup, You will have a supervision tree, if not it is just a library

In case You have a supervision tree, You can add Phoenix Pubsub, start a node and connect with the main application. Because the BEAM makes it easy to cluster nodes and work in a distributed mode

If You have a library, You could inject a notify function

It’s an application, there is a supervision tree.

I made a post about how to connect two nodes with Phoenix pubsub…

I wrote about it last year, maybe it can help, Let's talk