Hey Collin,
Op zondag 15 maart 2015 17:26:10 UTC+1 schreef Colin Yates:
>
>
> How do the worker fns actually get called - the dispatching is up to
> you - I tend to have a bus (or channel) which is the glue underneath
> the gateway.
>
> For example, I might have:
> - a command bus which needs
Glad I could help.
On Monday, 16 March 2015 08:02:40 UTC, Torsten Uhlmann wrote:
>
> Hi Colin,
>
> the thing I was missing is the entry point into the system, or a way to
> get hold of my current component. After re-watching the talk and looking at
> the slides (
> http://stuartsierra.com/downlo
Hi Colin,
the thing I was missing is the entry point into the system, or a way to get
hold of my current component. After re-watching the talk and looking at the
slides
(http://stuartsierra.com/download/2014-06-27-components-euroclojure.pdf) I
found him mentioning these on slides #94 to #105.
If you haven't already then you might want to watch:
https://www.youtube.com/watch?v=13cmHf_kt-Q
If it helps:
(defn a-real-worker [db]
...)
(defrecord ARealWorkerComponent [db registry]
components/Lifecycle
(start [this]
(registry-api/register registry (partial a-real-worker-fn db))
Colin,
thanks for the thoughtful explanation!
I still have a problem understanding the flow. Say I want to call a
component function (like "get-user") from another component that depends on
the database component.
I still don't understand how a component function accesses it's
dependencies? T
Hi Torsten,
It works best when it is all-or-nothing, so the caller of get-user
would itself be a component that is dependant upon the db component.
The way I visualise it is that the components are a very thin layer at
the outer edge of the system that delegate to actual worker functions.
Those w
Hi Walter,
thanks for the quick reply.
Now, what does the other side of the call look like, where does the caller
of "get-user" get the database component from? That's what I don't get.
Thanks,
Torsten.
Am Sonntag, 15. März 2015 16:51:51 UTC+1 schrieb Walter van der Laan:
>
> Hi,
>
> This is a
Hi,
This is an example from http://github.com/stuartsierra/component
(defn get-user [database username]
(execute-query (:connection database)
"SELECT * FROM users WHERE username = ?"
username))
Here 'database' is a component which is passed to 'get-user' as an
argument. The component
Hi,
I'm tapping my toes in component land and I think I lack some conceptual
understanding, probably done too much OO.
Please forgive me if this is a stupid question (and I get a feel that it
is)...
Suppose I create a Lifecycle component with some state, say, a database
component that creates
