Demonstration of go-metrics json output

go_metrics_json.go

package main

import (
	"encoding/json"
	"fmt"
	"github.com/rcrowley/go-metrics"
)

func main() {
	// PrefixedRegistry
	prefixedRegistry := metrics.NewPrefixedRegistry("prefix")
	counter1 := metrics.NewCounter()
	prefixedRegistry.Register("counter1", counter1)
	counter1.Inc(1)

	jsonBytes, _ := json.Marshal(prefixedRegistry)

	//output: {}
	fmt.Println(string(jsonBytes))

	// DefaultRegistry- implemented as StandardRegistry
	registry := metrics.DefaultRegistry
	counter2 := metrics.NewCounter()
	registry.Register("counter2", counter2)
	counter2.Inc(1)

	jsonBytes, _ = json.Marshal(registry)

	//output: {"counter2":{"count":1}}
	fmt.Println(string(jsonBytes))
}