Have you guys looked at dire?

https://github.com/MichaelDrogalis/dire/blob/master/README.md

it could be used to take decomplection one step further, by not defining
monitoring things inline at all. A library author could define additional
logging namespace(s) with fns that load different levels of logging.

On Monday, 27 July 2015, Colin Yates <colin.ya...@gmail.com> wrote:

> I don’t have a proof of concept either but if somebody is going to put
> some effort into writing a new library I had a great idea they could
> incorporate. Continuing the ‘decomplecting’ that James started, the other
> thing that is decomplected (or actually not addressed at all) is _why_ we
> want logging to be produced. For me, I often want to see WARNING and above
> all the time and only see INFO and below if something interesting happened.
> ‘Interesting’ typically being an exception happened.
>
> My notion was to add an adapter which at some point (e.g. around the
> use-case service/transaction boundary) started collecting all the logs
> in-memory and if the service executed correctly would simply drop the INFO
> and below messages. However, if the service aborted (e.g. threw an
> Exception) only then would the INFO and below logs get written to disk.
>
> It’s so simple and useful I can’t believe nobody else has already written
> it. My excuse is good old time. Clojure, Agents, robert-hooke - couldn’t be
> easer.
>
>
> On 27 Jul 2015, at 08:28, crocket <crockabisc...@gmail.com
> <javascript:_e(%7B%7D,'cvml','crockabisc...@gmail.com');>> wrote:
>
> Can I see your proof of concept on github? Is it just an idea?
>
> On Mon, Jul 27, 2015 at 2:27 PM, James Reeves <ja...@booleanknot.com
> <javascript:_e(%7B%7D,'cvml','ja...@booleanknot.com');>> wrote:
>
> On 27 July 2015 at 05:25, crocket <crockabisc...@gmail.com
> <javascript:_e(%7B%7D,'cvml','crockabisc...@gmail.com');>> wrote:
>
>
> How those logs are outputted is stored in a global state called log
> configuration. So, I think the separation was done.
> How else do you want to separate that?
>
>
>
> Traditionally, logging code is written something like:
>
>    (log/info "HTTP request to" (:request-method req) (:uri req))
>
> So the priority of the log (info) and the formatting of the log line is
> inlined into the source code.
>
> A less complected piece of code would separate out what we want to monitor
> (req) from how we monitor it. So inline we just write:
>
>    (monitor/monitor req :ring/request)
>
> This monitors the variable req and associates it with the namespaced
> keyword
> :ring/request. In our logging namespace, we can then later define how we
> want to report on that monitor:
>
>    (monitor/add-reporter
>     :ring/request
>     (fn [req] (log/info "HTTP request to" (:request-method req) (:uri
> req))))
>
> This separates *what* we want to monitor from *how* we eventually log it.
> It
> means we can do things like define a set of useful monitoring points in a
> library, and then in a separate application decide on what's important.
>
> - James
>
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