circuit-breaker

The circuit-breaker resiliency pattern for golang.

Creating a breaker takes three parameters:

• error threshold (for opening the breaker)
• success threshold (for closing the breaker)
• timeout (how long to keep the breaker open)

b := breaker.New(3, 1, 5*time.Second)

for {
    result := b.Run(func() error {
        // communicate with some external service and
        // return an error if the communication failed
        return nil
    })

    switch result {
    case nil:
        // success!
    case breaker.ErrBreakerOpen:
        // our function wasn't run because the breaker was open
    default:
        // some other error
    }
}