Cannot add sign to a gauge value

[alexsegura]

It is actually possible to add a +/- to a gauge

Adding a sign to the gauge value will change the value, rather than setting it. https://github.com/etsy/statsd/blob/master/docs/metric_types.md#gauges

But it impossible with the component because:

• the addToSend method casts $value as int
• there is a check in MessageEntity to verify that $value is an init

I can still use the writeDatas method directly but this is not satisfying.

This should definitely be supported by the client, as this is a valid StatsD message. I think this can be implemented quite easily, without any BC breaks.

I can submit a pull request.

[Oliboy50]

Hello @alexsegura

it seems that you're totally right, thank you for mentioning that.

Your pull request would be really appreciated :)