是否可以使用像 gobreaker 这样的断路器库在 lambda 处理程序中包装 HTTP 请求,我正在尝试类似下面的内容,但没有看到计数超过 1。也许 AWS lambda 不可能?我已经在本地使用 SAM 进行了测试,并在 AWS 上进行了部署。
func handler(ctx context.Context, request events.ALBTargetGroupRequest) (events.ALBTargetGroupResponse, error) {
resp, errBreaker := cb.Execute(func() (interface{}, error) {
return sendHttpRequestThatFails(request, ctx)
})
if errBreaker != nil {
log.Fatal("Error Breaker:", errBreaker)
}
return resp.(events.ALBTargetGroupResponse), nil
}
func main() {
//global config added to global circuit breaker variable
var st gobreaker.Settings
st.Name = "HTTP POST Breaker"
st.Timeout = 2
st.OnStateChange = func(name string, from gobreaker.State, to gobreaker.State) {
// do smth when circuit breaker trips.
log.Info("tripped breaker name : "+name+" from "+from.String() + " to "+to.String())
}
st.ReadyToTrip = func(counts gobreaker.Counts) bool {
log.Info("counts ,",counts )
return counts.TotalFailures >= 2 // I never see this count go over 1
}
cb = gobreaker.NewCircuitBreaker(st)
nrlambda.Start(handler, app)
}
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