Implement Circuit Breaker Pattern

[rizalgowandy]

It will be awesome if resty has a built-in circuit breaker that can be enabled.
This feature protects from too many open files and much more accidents.

Reference: https://github.com/eapache/go-resiliency

[jeevatkm]

@rizalgowandy Thanks for reaching out and recommending a new feature for Resty.

[mstrYoda]

Is there any progress on this? It would be quite good to have a built-in cb.

[taoli0515]

Bump on this - built in circuit breaker would be very helpful

[segevda]

Hi @jeevatkm,
If it's ok I'd like to take a shot at implementing this.

I was thinking about having the breaker at the client level, and count errors around the client.execute() calls.

Still debating if the CB should only count http.Do errors (i.e counting remote server issues only) or all errors (which include resty internal or middleware errors).

All input is appreciated 🙂

[jeevatkm]

@segevda Thanks for reaching out. I'm currently working on the SSE feature. If you want to take a shot, please use branch v3.

We should consider only http.Client.Do errors; request preparation and validation errors should not be considered.

[jeevatkm]

PR merged.