Events registration

[paneq]

@andrzejkrzywda proposed the idea of registering events in RES. Syntax and API not known. Let's brainstorm.

class OrderPlaced
end

event_store.register(OrderPlaced) do |order_placed|
  # order_placed would be a proxy or something like it...
  order_placed.subscribe(to: [OrderSummaryHandler])
end

The benefit could be that RES would know about all possible events.

[jandudulski]

Why do you need a block? I guess this could be as simple as:

event_store.register(OrderPlaced, to: [OrderSummaryHandler, FooHandler, BarHandler.new("args")])

Questions:

• what's the benefit of knowing all events by RES?
• what if some events won't be registered this way?
• what if the event has 0 subscribers? do we want to register them too?