Esempio n. 1
0
// Returns a thread-compatible implementation of GCM interactions.
func NewCore() (*GcmCore, error) {
	token, err := gce.NewAuthTokenProvider(GCMAuthScope)
	if err != nil {
		return nil, err
	}

	// Detect project.
	project, err := metadata.ProjectID()
	if err != nil {
		return nil, err
	}

	core := &GcmCore{
		token:           token,
		project:         project,
		exportedMetrics: make(map[string]metricDescriptor),
		lastValue:       gcstore.New(time.Hour),
	}

	// Wait for an initial token.
	_, err = core.token.WaitForToken()
	if err != nil {
		return nil, err
	}

	if err := core.listMetrics(); err != nil {
		return nil, err
	}

	return core, nil
}
Esempio n. 2
0
// Returns a thread-compatible implementation of GCM interactions.
func NewCore() (*GcmCore, error) {
	// TODO: Retry OnGCE call for ~15 seconds before declaring failure.
	time.Sleep(3 * time.Second)
	// Only support GCE for now.
	if !metadata.OnGCE() {
		return nil, fmt.Errorf("the GCM sink is currently only supported on GCE")
	}

	// Detect project.
	project, err := metadata.ProjectID()
	if err != nil {
		return nil, err
	}

	// Check required service accounts
	err = gce.VerifyAuthScope(GCLAuthScope)
	if err != nil {
		return nil, err
	}

	core := &GcmCore{
		project:         project,
		exportedMetrics: make(map[string]metricDescriptor),
		lastValue:       gcstore.New(time.Hour),
	}

	// Get an initial token.
	err = core.refreshToken()
	if err != nil {
		return nil, err
	}

	if err := core.listMetrics(); err != nil {
		return nil, err
	}

	return core, nil
}