Clojurians Log v2

is there a way to trigger a message from within a Controller’s params function?

@roberto you could, but it would go to the wrong "instance" of the controller. Params function is called before the controller is started. Why not calling it from the start function?

I probably don’t understand the lifecycle of a component.

the start function only gets called once, right?

while the params function gets called everytime the url changes?

I have a component that is already rendered, and want to modify it everytime the url changes.

oh

you get the route-changed command sent through the in-chan everytime route changes

https://github.com/keechma/keechma-place-my-order/blob/master/client/src/client/controllers/vacuum.cljs#L37

@roberto ^

ah

thank you

that is very helpful

I didn’t think to look inside that file. Didn’t understand its purpose

it basically clears the stale data from the entity db on each route change

so you can have a controller that is not associated with any component

yeah

controllers operate on the route

they don't really care about components

okay, I think it is kind of clicking. So, the only way a component can be linked to a controller is via its topic. And it can only be associated to one topic, hence only to one controller.

yeah

but that doesn’t restrict it from sending commands to other controllers using the send-command, right?

it does because the component's send command will always send it on it's one topic

but if you need to broadcast the message

theoretically you could add a transducer

on teh command channel

and duplicate commands

ah, so change the url if you want to broadcast?

to various topics

yeah

okay, that sounds cleaner

also, controllers can send commands to other controllers

so you could have a controller that relays commands from the component to other controllers

cool, yeah I did that with a search component

but I don’t think I understood what I was doing :simple_smile:

it is becoming clearer now.