//OutputMetricsIfRequired will send metrics to Graphite if a non-empty graphiteTCPAddress is passed in, or to the standard log if logMetrics is true.
// Make sure a sensible graphitePrefix that will uniquely identify your service is passed in, e.g. "content.test.people.rw.neo4j.ftaps58938-law1a-eu-t
func OutputMetricsIfRequired(graphiteTCPAddress string, graphitePrefix string, logMetrics bool) {
if graphiteTCPAddress != "" {
addr, _ := net.ResolveTCPAddr("tcp", graphiteTCPAddress)
go graphite.Graphite(metrics.DefaultRegistry, 5*time.Second, graphitePrefix, addr)
}
if logMetrics { //useful locally
//messy use of the 'standard' log package here as this method takes the log struct, not an interface, so can't use logrus.Logger
go metrics.Log(metrics.DefaultRegistry, 60*time.Second, standardLog.New(os.Stdout, "metrics", standardLog.Lmicroseconds))
}
}
// gmGraphiteRegistry returns a go-metrics registry that reports to a Graphite server.
func gmGraphiteRegistry(prefix, addr string, interval time.Duration) (Registry, error) {
if addr == "" {
return nil, errors.New(" graphite addr missing")
}
a, err := net.ResolveTCPAddr("tcp", addr)
if err != nil {
return nil, fmt.Errorf(" cannot connect to Graphite: %s", err)
}
r := gm.NewRegistry()
go graphite.Graphite(r, interval, prefix, a)
return &gmRegistry{r}, nil
}