func initializeMetrics(batchIntervalMilliseconds uint) *metricbatcher.MetricBatcher {
	eventEmitter := dropsonde.AutowiredEmitter()
	metricSender := metric_sender.NewMetricSender(eventEmitter)
	metricBatcher := metricbatcher.New(metricSender, time.Duration(batchIntervalMilliseconds)*time.Millisecond)
	metrics.Initialize(metricSender, metricBatcher)
	return metricBatcher
}

func initialize() {
	sender := metric_sender.NewMetricSender(AutowiredEmitter())
	batcher := metricbatcher.New(sender, defaultBatchInterval)
	metrics.Initialize(sender, batcher)
	logs.Initialize(log_sender.NewLogSender(AutowiredEmitter(), statsInterval, gosteno.NewLogger("dropsonde/logs")))
	go runtime_stats.NewRuntimeStats(autowiredEmitter, statsInterval).Run(nil)
	http.DefaultTransport = InstrumentedRoundTripper(http.DefaultTransport)
}

func initializeMetrics(messageTagger *tagger.Tagger, config *config.Config, logger *gosteno.Logger) {
	metricsAggregator := messageaggregator.New(messageTagger, logger)

	eventWriter := eventwriter.New("MetronAgent", metricsAggregator)
	metricSender := metric_sender.NewMetricSender(eventWriter)
	metricBatcher := metricbatcher.New(metricSender, time.Duration(config.MetricBatchIntervalSeconds)*time.Second)
	metrics.Initialize(metricSender, metricBatcher)
}

func initializeMetrics(byteSigner *signer.Signer, config *config.Config, logger *gosteno.Logger) {
	metricsMarshaller := eventmarshaller.New(byteSigner, logger)
	metricsTagger := tagger.New(config.Deployment, config.Job, config.Index, metricsMarshaller)
	metricsAggregator := messageaggregator.New(metricsTagger, logger)

	eventWriter := eventwriter.New("MetronAgent", metricsAggregator)
	metricSender := metric_sender.NewMetricSender(eventWriter)
	metricBatcher := metricbatcher.New(metricSender, time.Duration(config.MetricBatchIntervalSeconds)*time.Second)
	metrics.Initialize(metricSender, metricBatcher)
}

func initializeMetrics(config *config.Config, stopChan chan struct{}, logger *gosteno.Logger) (*metricbatcher.MetricBatcher, *eventwriter.EventWriter) {
	eventWriter := eventwriter.New(origin)
	metricSender := metric_sender.NewMetricSender(eventWriter)
	metricBatcher := metricbatcher.New(metricSender, time.Duration(config.MetricBatchIntervalMilliseconds)*time.Millisecond)
	metrics.Initialize(metricSender, metricBatcher)

	stats := runtime_stats.NewRuntimeStats(eventWriter, time.Duration(config.RuntimeStatsIntervalMilliseconds)*time.Millisecond)
	go stats.Run(stopChan)
	return metricBatcher, eventWriter
}

func initializeMetrics(messageTagger *tagger.Tagger, config *config.Config, stopChan chan struct{}, logger *gosteno.Logger) {
	metricsAggregator := messageaggregator.New(messageTagger, logger)

	eventWriter := eventwriter.New("MetronAgent", metricsAggregator)
	metricSender := metric_sender.NewMetricSender(eventWriter)
	metricBatcher := metricbatcher.New(metricSender, time.Duration(config.MetricBatchIntervalMilliseconds)*time.Millisecond)
	metrics.Initialize(metricSender, metricBatcher)

	stats := runtime_stats.NewRuntimeStats(eventWriter, time.Duration(config.RuntimeStatsIntervalMilliseconds)*time.Millisecond)
	go stats.Run(stopChan)
}

	"os"
	"sync"
)

// these tests need to be invoked individually from an external script,
// since environment variables need to be set/unset before starting the tests
var _ = Describe("Autowire End-to-End", func() {
	Context("with DROPSONDE_ORIGIN set", func() {
		var oldEnv string

		BeforeEach(func() {
			oldEnv = os.Getenv("DROPSONDE_ORIGIN")
			os.Setenv("DROPSONDE_ORIGIN", "test-origin")
			emitter, _ := autowire.CreateDefaultEmitter()
			autowire.Initialize(emitter)
			metrics.Initialize(metric_sender.NewMetricSender(autowire.AutowiredEmitter()))
		})

		AfterEach(func() {
			os.Setenv("DROPSONDE_ORIGIN", oldEnv)
		})

		It("emits HTTP client/server events and heartbeats", func() {
			udpListener, err := net.ListenPacket("udp4", ":3457")
			Expect(err).ToNot(HaveOccurred())
			defer udpListener.Close()
			udpDataChan := make(chan []byte, 16)

			receivedEvents := make(map[string]bool)
			lock := sync.RWMutex{}
			origin := os.Getenv("DROPSONDE_ORIGIN")

	"time"
)

var (
	fakeEventEmitter *fake.FakeEventEmitter
	uptimeMonitor    monitor.Monitor
)

const (
	interval = 100 * time.Millisecond
)

var _ = Describe("UptimeMonitor", func() {
	BeforeEach(func() {
		fakeEventEmitter = fake.NewFakeEventEmitter("MonitorTest")
		sender := metric_sender.NewMetricSender(fakeEventEmitter)
		batcher := metricbatcher.New(sender, 100*time.Millisecond)

		metrics.Initialize(sender, batcher)

		uptimeMonitor = monitor.NewUptimeMonitor(interval)
		go uptimeMonitor.Start()
	})

	AfterEach(func() {
		fakeEventEmitter.Close()
	})

	Context("stops automatically", func() {

		AfterEach(func() {

func init() {
	Initialize(metric_sender.NewMetricSender(autowire.AutowiredEmitter()))
}

)

// these tests need to be invoked individually from an external script,
// since environment variables need to be set/unset before starting the tests
var _ = Describe("Autowire End-to-End", func() {
	Context("with standard initialization", func() {
		origin := []string{"test-origin"}

		BeforeEach(func() {
			var err error
			udpListener, err = net.ListenPacket("udp4", ":3457")
			Expect(err).ToNot(HaveOccurred())

			go listenForEvents(origin)
			dropsonde.Initialize("localhost:3457", origin...)
			sender := metric_sender.NewMetricSender(dropsonde.AutowiredEmitter())
			batcher := metricbatcher.New(sender, 100*time.Millisecond)
			metrics.Initialize(sender, batcher)
		})

		AfterEach(func() {
			udpListener.Close()
		})

		It("emits HTTP client/server events", func() {
			httpListener, err := net.Listen("tcp", "localhost:0")
			Expect(err).ToNot(HaveOccurred())
			defer httpListener.Close()
			httpHandler := dropsonde.InstrumentedHandler(FakeHandler{})
			go http.Serve(httpListener, httpHandler)

	"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))
		Expect(metric.GetUnit()).To(Equal("answers"))
	})

	It("returns an error if it can't send metric value", func() {
		emitter.ReturnError = errors.New("some error")