Golang MetricSender Examples

Example #1

File: metricbatcher.go Project: trainchou/gorouter

// New instantiates a running MetricBatcher. Eventswill be emitted once per batchDuration. All
// updates to a given counter name will be combined into a single event and sent to metricSender.
func New(metricSender metric_sender.MetricSender, batchDuration time.Duration) *MetricBatcher {
	mb := &MetricBatcher{
		metrics:      make(map[string]uint64),
		batchTicker:  time.NewTicker(batchDuration),
		metricSender: metricSender,
	}

	go func() {
		for {
			<-mb.batchTicker.C
			mb.lock.Lock()

			for name, delta := range mb.metrics {
				metricSender.AddToCounter(name, delta)
			}
			mb.unsafeReset()

			mb.lock.Unlock()
		}
	}()

	return mb
}

Example #2

File: metric_sender_test.go Project: trainchou/gorouter

package metric_sender_test

import (
	"errors"

	"github.com/cloudfoundry/dropsonde/emitter/fake"
	"github.com/cloudfoundry/dropsonde/events"
	"github.com/cloudfoundry/dropsonde/metric_sender"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
)

var _ = Describe("MetricSender", func() {
	var (
		emitter *fake.FakeEventEmitter
		sender  metric_sender.MetricSender
	)

	BeforeEach(func() {
		emitter = fake.NewFakeEventEmitter("origin")
		sender = metric_sender.NewMetricSender(emitter)
	})

	It("sends a metric to its emitter", func() {
		err := sender.SendValue("metric-name", 42, "answers")
		Expect(err).NotTo(HaveOccurred())

		Expect(emitter.GetMessages()).To(HaveLen(1))
		metric := emitter.GetMessages()[0].Event.(*events.ValueMetric)
		Expect(metric.GetName()).To(Equal("metric-name"))
		Expect(metric.GetValue()).To(BeNumerically("==", 42))

Example #3

File: metric_sender_test.go Project: johannespetzold/gorouter

package metric_sender_test

import (
	"errors"
	"github.com/cloudfoundry/dropsonde/emitter/fake"
	"github.com/cloudfoundry/dropsonde/events"
	"github.com/cloudfoundry/dropsonde/metric_sender"

	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
)

var _ = Describe("MetricSender", func() {
	var (
		emitter *fake.FakeEventEmitter
		sender  metric_sender.MetricSender
	)

	BeforeEach(func() {
		emitter = fake.NewFakeEventEmitter("origin")
		sender = metric_sender.NewMetricSender(emitter)
	})

	It("sends a metric to its emitter", func() {
		err := sender.SendValue("metric-name", 42, "answers")
		Expect(err).NotTo(HaveOccurred())

		Expect(emitter.Messages).To(HaveLen(1))
		metric := emitter.Messages[0].Event.(*events.ValueMetric)
		Expect(metric.GetName()).To(Equal("metric-name"))
		Expect(metric.GetValue()).To(BeNumerically("==", 42))