Golang NewUdpEmitter Examples

Example #1

File: autowire.go Project: KeyOfSpectator/gorouter

func Initialize() {
	http.DefaultTransport = &http.Transport{Proxy: http.ProxyFromEnvironment}
	autowiredEmitter = nil

	origin := os.Getenv("DROPSONDE_ORIGIN")
	if len(origin) == 0 {
		log.Println("Failed to auto-initialize dropsonde: DROPSONDE_ORIGIN environment variable not set")
		return
	}

	destination = os.Getenv("DROPSONDE_DESTINATION")
	if len(destination) == 0 {
		log.Println("DROPSONDE_DESTINATION not set. Using " + defaultDestination)
		destination = defaultDestination
	}

	udpEmitter, err := emitter.NewUdpEmitter(destination)
	if err != nil {
		log.Printf("Failed to auto-initialize dropsonde: %v\n", err)
		return
	}

	hbEmitter, err := emitter.NewHeartbeatEmitter(udpEmitter, origin)
	if err != nil {
		log.Printf("Failed to auto-initialize dropsonde: %v\n", err)
		return
	}

	autowiredEmitter = emitter.NewEventEmitter(hbEmitter, origin)

	http.DefaultTransport = InstrumentedRoundTripper(http.DefaultTransport)
}

Example #2

File: udp_emitter_test.go Project: tomzhang/golang-devops-stuff

package emitter_test

import (
	"github.com/cloudfoundry-incubator/dropsonde/emitter"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	"net"
)

var _ = Describe("UdpEmitter", func() {
	var testData = []byte("hello")

	Describe("Close()", func() {
		It("closes the UDP connection", func() {

			udpEmitter, _ := emitter.NewUdpEmitter("localhost:42420")

			udpEmitter.Close()

			err := udpEmitter.Emit(testData)
			Expect(err).To(HaveOccurred())
			Expect(err.Error()).To(Equal("use of closed network connection"))
		})
	})

	Describe("Emit()", func() {
		var udpEmitter emitter.ByteEmitter

		Context("when the agent is listening", func() {

			var agentListener net.PacketConn