>
>
> For instance, which one of these to you consider to be the best
> representation of a event to set the expiry time:
>
> [:cache/expire #inst "2015-09-08T12:00:00Z"]
>
> {:type :cache/expire, :value #inst "2015-09-08T12:00:00Z"}
>
> #cache.Expire [#inst "2015-09-08T12:00:00Z"]
>
> #cache.Expire {:value #inst "2015-09-08T12:00:00Z"}
>
None of those, well the {:type ... :value ...} one is closest.
I tried to stay away from the Type/Variant discussion since I'm not
familiar enough with all the theory behind it and generally like to be more
practical. Also there isn't enough context in your question to give an
acceptable answer. Generally I'd have something like (set-expiration-time
thing time) but since you said "event" I assume you have some kind of
messaging system. So I'd abstract the usual message patterns and use a
message "envelope".
(defrecord Message [type payload])
type would probably be a Keyword and payload probably Any.
So to write it as edn:
#my.app/message [:cache/expire #inst "2015-09-08T12:00:00Z"]
#my.app/message {:type :cache/expire, :payload ...}
Note that this is ONLY the representation on-the-wire which you generally
want to be compact as possible, so I'd choose the vector variant since it
is more compact and doesn't encode the keys.
What I get when I "read" this data is not tied to the data format used on
the wire though, don't mix those up. The wire-format has totally different
requirements than your code.
/thomas
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