Golang EventSource Examples

Example #1

File: event_stream_test.go Project: cfibmers/bbs

func streamEvents(eventSource events.EventSource) chan models.Event {
	eventChannel := make(chan models.Event)

	go func() {
		for {
			event, err := eventSource.Next()
			if err != nil {
				close(eventChannel)
				return
			}
			eventChannel <- event
		}
	}()

	return eventChannel
}

Example #2

File: event_source_test.go Project: cfibmers/bbs

import (
	"encoding/base64"
	"errors"
	"io"

	"code.cloudfoundry.org/bbs/events"
	"code.cloudfoundry.org/bbs/events/eventfakes"
	"code.cloudfoundry.org/bbs/models"
	"github.com/gogo/protobuf/proto"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
	"github.com/vito/go-sse/sse"
)

var _ = Describe("EventSource", func() {
	var eventSource events.EventSource
	var fakeRawEventSource *eventfakes.FakeRawEventSource

	BeforeEach(func() {
		fakeRawEventSource = new(eventfakes.FakeRawEventSource)
		eventSource = events.NewEventSource(fakeRawEventSource)
	})

	Describe("Next", func() {
		Describe("Desired LRP events", func() {
			var desiredLRP *models.DesiredLRP

			BeforeEach(func() {
				desiredLRP = &models.DesiredLRP{
					ProcessGuid: "some-guid",
					Domain:      "some-domain",

Example #3

File: hub_test.go Project: cfibmers/bbs

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

var _ = Describe("Hub", func() {
	var (
		hub events.Hub
	)

	BeforeEach(func() {
		hub = events.NewHub()
	})

	Describe("RegisterCallback", func() {
		Context("when registering the callback", func() {
			var eventSource events.EventSource
			var counts chan int

			BeforeEach(func() {
				var err error
				eventSource, err = hub.Subscribe()
				Expect(err).NotTo(HaveOccurred())

				counts = make(chan int, 1)
				cbCounts := counts
				hub.RegisterCallback(func(count int) {
					cbCounts <- count
				})
			})

			It("calls the callback immediately with the current subscriber count", func() {