add Graphite formatters

[kennydee]

Hi,

This PR allow to use Phantomas to easily export results into Graphite backend.

./phantomas --url http://www.google.com --format graphite | nc mygraphite.org 2003

will generate a graphite node : stats_counts.phantomas.google-com.<metricsname> for each metrics computed by Phantomas.

You could then add a cron job for your website to do this every 10 minutes for exemple, in order to have an impressive dashboard for Synthetic User Monitoring made by Phantomas, like this :

Thanks.

[macbre]

@kennydee, thanks for the PR. As a part of #186 reporters will be rewritten to be run in NodeJS context (not within PhantomJS script). This will give us the freedom of, for instance using statsd module to emit metrics - #10

Please wait with implementing this feature until #186 is done. It will allow us to send UDP datagrams to graphite backend directly from phantomas runner script (without pipe-ing it via nc). Or graphite npm module can be used.

[macbre]

Pure curiosity: why would you need folding for Travis when generating metrics to be sent to graphite?

[kennydee]

Because of how the plain formatter was made... So no valid reason.

[kennydee]

👍
Thanks for your answer.
Will be waiting for #186 to be done ;-)

[macbre]

@kennydee: #186 is completed and merged into master. You can take a look at #10 to see how "asynchronous" reporter can be implemented.