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[doc]: logging via mount-up

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Anatoly 2017-08-17 12:03:43 -04:00 committed by GitHub
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@ -40,6 +40,8 @@ _**Alan J. Perlis** from [Structure and Interpretation of Computer Programs](htt
- [:on-reload](#on-reload)
- [Cleaning up Deleted States](#cleaning-up-deleted-states)
- [Logging](#logging)
- [mount-up](#mount-up)
- [Manual AOP](#manual-aop)
- [Clojure Version](#clojure-version)
- [Mount and Develop!](#mount-and-develop)
- [Running New York Stock Exchange](#running-new-york-stock-exchange)
@ -584,9 +586,29 @@ Valid question. It was a [conscious choice](https://github.com/tolitius/mount/is
Since mount is a _library_ it should _not_ bring any dependencies unless its functionality directly depends on them.
> But I still these logging statements in the examples.
> _But I still these logging statements in the examples..._
The way this is done is via an excellent [robert hooke](https://github.com/technomancy/robert-hooke/). Example applications live in `test`, so does the [utility](test/clj/tapp/utils/logging.clj#L42) that adds logging to all the mount's lifecycle functions on start in [dev.clj](https://github.com/tolitius/mount/blob/75d7cdc610ce38623d4d3aea1da3170d1c9a3b4b/dev/dev.clj#L21).
### mount-up
One way to do that would be using "[mount-up](https://github.com/tolitius/mount-up)" that "watches mount's ups and downs":
```clojure
=> (require '[mount-up.core :as mu])
=> (mu/on-upndown :info mu/log :before)
=> (mount/start)
INFO mount-up.core - >> starting.. #'boot.user/server
{:started ["#'boot.user/server"]}
=> (mount/stop)
INFO mount-up.core - << stopping.. #'boot.user/server
{:stopped ["#'boot.user/server"]}
```
### Manual AOP
Another, a more manual way, would be to do it via an excellent [robert hooke](https://github.com/technomancy/robert-hooke/). Example applications live in `test`, so does the [utility](test/clj/tapp/utils/logging.clj#L42) that adds logging to all the mount's lifecycle functions on start in [dev.clj](https://github.com/tolitius/mount/blob/75d7cdc610ce38623d4d3aea1da3170d1c9a3b4b/dev/dev.clj#L21).
## Clojure Version