Golang proto.String函數代碼示例

func writeValueMessage(port int) {
	conn, err := net.Dial("udp", fmt.Sprintf("localhost:%d", port))
	Expect(err).ToNot(HaveOccurred())

	message := &events.Envelope{
		EventType: events.Envelope_ValueMetric.Enum(),
		Origin:    proto.String("someorigin"),

		ValueMetric: &events.ValueMetric{
			Name:  proto.String("some name"),
			Value: proto.Float64(24.0),
			Unit:  proto.String("some unit"),
		},
	}

	messageBytes, err := proto.Marshal(message)
	Expect(err).ToNot(HaveOccurred())

	// Pad the first 32 bytes of the payload with zeroes
	// In reality this would be the signature

	padding := make([]byte, 32)

	payload := append(padding, messageBytes...)
	conn.Write(payload)
}

func NewFrameworkInfo(user, name string, frameworkId *mesos.FrameworkID) *mesos.FrameworkInfo {
	return &mesos.FrameworkInfo{
		User: proto.String(user),
		Name: proto.String(name),
		Id:   frameworkId,
	}
}

func main() {
	req := command.Read()
	files := req.GetProtoFile()
	files = vanity.FilterFiles(files, vanity.NotInPackageGoogleProtobuf)
	vanity.ForEachFile(files, vanity.TurnOnPopulateAll)
	vanity.ForEachFile(files, vanity.TurnOnGoStringAll)
	vanity.ForEachFile(files, vanity.TurnOnDescriptionAll)
	resp := command.Generate(req)

	msgs := []string{}
	for _, file := range files {
		if file.GetPackage() == "fuzztests" {
			for _, message := range file.GetMessageType() {
				msgs = append(msgs, "NewPopulated"+message.GetName())
			}
		}
	}
	content := `
// Code generated by protoc-gen-gogopop.
// DO NOT EDIT!

package fuzztests

	var popFuncs = []interface{}{
		` +
		strings.Join(msgs, ",\n") +
		`,
	}`
	newFile := &plugin.CodeGeneratorResponse_File{
		Name:    proto.String("./pop.gen.go"),
		Content: proto.String(content),
	}
	resp.File = append(resp.File, newFile)
	command.Write(resp)
}

func createTask(job *Job, offer *mesos.Offer) mesos.TaskInfo {
	taskId := &mesos.TaskID{
		Value: proto.String(fmt.Sprintf("moroccron-task-%d-%s", time.Now().Unix(), job.Id)),
	}

	command_info := job.CreateCommandInfo()
	task := mesos.TaskInfo{
		Name:    proto.String(taskId.GetValue()),
		TaskId:  taskId,
		SlaveId: offer.SlaveId,
		Container: &mesos.ContainerInfo{
			Type:     mesos.ContainerInfo_DOCKER.Enum(),
			Volumes:  nil,
			Hostname: nil,
			Docker: &mesos.ContainerInfo_DockerInfo{
				Image:   &DOCKER_IMAGE_DEFAULT,
				Network: mesos.ContainerInfo_DockerInfo_BRIDGE.Enum(),
			},
		},
		Command:  &command_info,
		Executor: nil,
		Resources: []*mesos.Resource{
			util.NewScalarResource("cpus", job.CpuResources),
			util.NewScalarResource("mem", job.MemResources),
		},
		//Data: job_json,
	}
	return task
}

// used when scheduler creates a new TaskInfo for this job.
//TODO should task creation be in this package?
func (j *Job) CreateCommandInfo() mesos.CommandInfo {
	// FYI we ignore the CommandInfo.Container field. Image information is provided in the TaskInfo.Container instead
	// this will probably change in the future
	ci := mesos.CommandInfo{
		Shell: proto.Bool(j.Shell),
	}
	if j.Shell {
		// value is executed by sh -c 'value'
		ci.Value = proto.String(*j.Command)
	} else {
		// value is the executable, arguments are vararg passed to it
		if j.Command != nil {
			ci.Value = proto.String(*j.Command)
		}
		ci.Arguments = j.Arguments
	}
	// set any environment variables that were passed in
	env_vars := make([]*mesos.Environment_Variable, len(j.Environment))
	i := 0
	for k, v := range j.Environment {
		env_vars[i] = &mesos.Environment_Variable{
			Name:  &k,
			Value: &v,
		}
		i++
	}
	ci.Environment = &mesos.Environment{Variables: env_vars}
	return ci
}

// Encodes the SnapshotRecoveryRequest to a buffer. Returns the number of bytes
// written and any error that may have occurred.
func (req *SnapshotRecoveryRequest) Encode(w io.Writer) (int, error) {

	protoPeers := make([]*protobuf.SnapshotRecoveryRequest_Peer, len(req.Peers))

	for i, peer := range req.Peers {
		protoPeers[i] = &protobuf.SnapshotRecoveryRequest_Peer{
			Name:             proto.String(peer.Name),
			ConnectionString: proto.String(peer.ConnectionString),
		}
	}

	pb := &protobuf.SnapshotRecoveryRequest{
		LeaderName: proto.String(req.LeaderName),
		LastIndex:  proto.Uint64(req.LastIndex),
		LastTerm:   proto.Uint64(req.LastTerm),
		Peers:      protoPeers,
		State:      req.State,
	}
	p, err := proto.Marshal(pb)
	if err != nil {
		return -1, err
	}

	return w.Write(p)
}

// PrintAsText outputs all metrics in text format.
func (r *Registry) PrintAsText(w io.Writer) error {
	var metricFamily prometheusgo.MetricFamily
	var ret error
	labels := r.getLabels()
	for _, metric := range r.tracked {
		metric.Inspect(func(v interface{}) {
			if ret != nil {
				return
			}
			if prom, ok := v.(PrometheusExportable); ok {
				metricFamily.Reset()
				metricFamily.Name = proto.String(exportedName(metric.GetName()))
				metricFamily.Help = proto.String(metric.GetHelp())
				prom.FillPrometheusMetric(&metricFamily)
				if len(labels) != 0 {
					// Set labels from registry. We only set one metric in the slice, but loop anyway.
					for _, m := range metricFamily.Metric {
						m.Label = labels
					}
				}
				if l := prom.GetLabels(); len(l) != 0 {
					// Append per-metric labels.
					for _, m := range metricFamily.Metric {
						m.Label = append(m.Label, l...)
					}
				}
				if _, err := expfmt.MetricFamilyToText(w, &metricFamily); err != nil {
					ret = err
				}
			}
		})
	}
	return ret
}

// marshal serializes to a protobuf representation.
func (ni NodeInfo) marshal() *internal.NodeInfo {
	pb := &internal.NodeInfo{}
	pb.ID = proto.Uint64(ni.ID)
	pb.Host = proto.String(ni.Host)
	pb.TCPHost = proto.String(ni.TCPHost)
	return pb
}

func createStartStopMessage(requestId uint64, peerType events.PeerType) *events.Envelope {
	return &events.Envelope{
		Origin:    proto.String("fake-origin-2"),
		EventType: events.Envelope_HttpStartStop.Enum(),
		HttpStartStop: &events.HttpStartStop{
			StartTimestamp: proto.Int64(1),
			StopTimestamp:  proto.Int64(100),
			RequestId: &events.UUID{
				Low:  proto.Uint64(requestId),
				High: proto.Uint64(requestId + 1),
			},
			PeerType:      &peerType,
			Method:        events.Method_GET.Enum(),
			Uri:           proto.String("fake-uri-1"),
			RemoteAddress: proto.String("fake-remote-addr-1"),
			UserAgent:     proto.String("fake-user-agent-1"),
			StatusCode:    proto.Int32(103),
			ContentLength: proto.Int64(104),
			ParentRequestId: &events.UUID{
				Low:  proto.Uint64(2),
				High: proto.Uint64(3),
			},
			ApplicationId: &events.UUID{
				Low:  proto.Uint64(105),
				High: proto.Uint64(106),
			},
			InstanceIndex: proto.Int32(6),
			InstanceId:    proto.String("fake-instance-id-1"),
		},
	}
}

func NewHttpStart(req *http.Request, peerType events.PeerType, requestId *uuid.UUID) *events.HttpStart {
	httpStart := &events.HttpStart{
		Timestamp:     proto.Int64(time.Now().UnixNano()),
		RequestId:     NewUUID(requestId),
		PeerType:      &peerType,
		Method:        events.Method(events.Method_value[req.Method]).Enum(),
		Uri:           proto.String(fmt.Sprintf("%s%s", req.Host, req.URL.Path)),
		RemoteAddress: proto.String(req.RemoteAddr),
		UserAgent:     proto.String(req.UserAgent()),
	}

	if applicationId, err := uuid.ParseHex(req.Header.Get("X-CF-ApplicationID")); err == nil {
		httpStart.ApplicationId = NewUUID(applicationId)
	}

	if instanceIndex, err := strconv.Atoi(req.Header.Get("X-CF-InstanceIndex")); err == nil {
		httpStart.InstanceIndex = proto.Int(instanceIndex)
	}

	if instanceId := req.Header.Get("X-CF-InstanceID"); instanceId != "" {
		httpStart.InstanceId = &instanceId
	}

	return httpStart
}

func TranslateDropsondeToLegacyLogMessage(message []byte) ([]byte, error) {
	var receivedEnvelope events.Envelope
	err := proto.Unmarshal(message, &receivedEnvelope)
	if err != nil {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Unable to unmarshal bytes as Envelope: %v", err)
	}

	if receivedEnvelope.GetEventType() != events.Envelope_LogMessage {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Envelope contained %s instead of LogMessage", receivedEnvelope.GetEventType().String())
	}

	logMessage := receivedEnvelope.GetLogMessage()
	if logMessage == nil {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Envelope's LogMessage was nil: %v", receivedEnvelope)
	}

	messageBytes, err := proto.Marshal(
		&logmessage.LogMessage{
			Message:     logMessage.GetMessage(),
			MessageType: (*logmessage.LogMessage_MessageType)(logMessage.MessageType),
			Timestamp:   proto.Int64(logMessage.GetTimestamp()),
			AppId:       proto.String(logMessage.GetAppId()),
			SourceId:    proto.String(logMessage.GetSourceInstance()),
			SourceName:  proto.String(logMessage.GetSourceType()),
		},
	)
	if err != nil {
		return nil, fmt.Errorf("TranslateDropsondeToLegacyLogMessage: Failed marshalling converted dropsonde message: %v", err)
	}

	return messageBytes, nil
}

func prepareExecutorInfo(id string) *mesos.ExecutorInfo {
	executorUris := []*mesos.CommandInfo_URI{}
	executorUris = append(executorUris, &mesos.CommandInfo_URI{Value: execUri, Executable: proto.Bool(true)})

	// forward the value of the scheduler's -v flag to the executor
	v := 0
	if f := flag.Lookup("v"); f != nil && f.Value != nil {
		if vstr := f.Value.String(); vstr != "" {
			if vi, err := strconv.ParseInt(vstr, 10, 32); err == nil {
				v = int(vi)
			}
		}
	}
	executorCommand := fmt.Sprintf("./%s -logtostderr=true -v=%d", execCmd, v)

	go http.ListenAndServe(fmt.Sprintf("%s:%d", *address, *artifactPort), nil)
	log.V(2).Info("Serving executor artifacts...")

	// Create mesos scheduler driver.
	return &mesos.ExecutorInfo{
		ExecutorId: util.NewExecutorID(id),
		Name:       proto.String("Test Executor (Go)"),
		Source:     proto.String("go_test"),
		Command: &mesos.CommandInfo{
			Value: proto.String(executorCommand),
			Uris:  executorUris,
		},
	}
}

// Super-useful utility func that attempts to build a mesos.MasterInfo from a
// upid.UPID specification. An attempt is made to determine the IP address of
// the UPID's Host and any errors during such resolution will result in a nil
// returned result. A nil result is also returned upon errors parsing the Port
// specification of the UPID.
//
// TODO(jdef) make this a func of upid.UPID so that callers can invoke somePid.MasterInfo()?
//
func CreateMasterInfo(pid *upid.UPID) *mesos.MasterInfo {
	if pid == nil {
		return nil
	}
	port, err := strconv.Atoi(pid.Port)
	if err != nil {
		log.Errorf("failed to parse port: %v", err)
		return nil
	}
	//TODO(jdef) what about (future) ipv6 support?
	var ipv4 net.IP
	if addrs, err := net.LookupIP(pid.Host); err == nil {
		for _, ip := range addrs {
			if ip = ip.To4(); ip != nil {
				ipv4 = ip
				break
			}
		}
		if ipv4 == nil {
			log.Errorf("host does not resolve to an IPv4 address: %v", pid.Host)
			return nil
		}
	} else {
		log.Errorf("failed to lookup IPs for host '%v': %v", pid.Host, err)
		return nil
	}
	packedip := binary.BigEndian.Uint32(ipv4) // network byte order is big-endian
	mi := util.NewMasterInfo(pid.ID, packedip, uint32(port))
	mi.Pid = proto.String(pid.String())
	if pid.Host != "" {
		mi.Hostname = proto.String(pid.Host)
	}
	return mi
}

func prepareExecutorInfo(gt net.Addr) *mesos.ExecutorInfo {
	executorUris := []*mesos.CommandInfo_URI{}
	uri := serveSelf()
	executorUris = append(executorUris, &mesos.CommandInfo_URI{Value: uri, Executable: proto.Bool(true)})

	// forward the value of the scheduler's -v flag to the executor
	v := 0
	if f := flag.Lookup("v"); f != nil && f.Value != nil {
		if vstr := f.Value.String(); vstr != "" {
			if vi, err := strconv.ParseInt(vstr, 10, 32); err == nil {
				v = int(vi)
			}
		}
	}
	nodeCommand := fmt.Sprintf("./executor -logtostderr=true -v=%d -node -tracerAddr %s", v, gt.String())
	log.V(2).Info("nodeCommand: ", nodeCommand)

	// Create mesos scheduler driver.
	return &mesos.ExecutorInfo{
		ExecutorId: util.NewExecutorID("default"),
		Name:       proto.String("visghs-node"),
		Source:     proto.String("visghs"),
		Command: &mesos.CommandInfo{
			Value: proto.String(nodeCommand),
			Uris:  executorUris,
		},
		Resources: []*mesos.Resource{
			util.NewScalarResource("cpus", CPUS_PER_EXECUTOR),
			util.NewScalarResource("mem", MEM_PER_EXECUTOR),
		},
	}
}

func (self *manager) Start() error {
	if self.verifyConnectionWithMesos() == false {
		return errors.New("Mesos unreachable")
	}

	self.frameworkInfo.User = proto.String("root")

	// set default hostname
	if self.frameworkInfo.GetHostname() == "" {
		host, err := os.Hostname()
		if err != nil || host == "" {
			host = "unknown"
		}
		self.frameworkInfo.Hostname = proto.String(host)
	}

	if m, err := upid.Parse("[email protected]" + self.master); err != nil {
		return err
	} else {
		self.masterUPID = m
	}

	self.selfUPID = &upid.UPID{
		ID:   "scheduler",
		Host: self.GetListenerIP(),
		Port: fmt.Sprintf("%d", self.GetListenerPortForScheduler())}

	communication.InitRestHandler(self)
	redis.InitRedisUpdater(self)

	self.announceFramework()

	return nil
}