Add a run-once lambda mode.

integrations/influxunifi/pkg/unifi-poller/config.go

@@ -33,6 +33,7 @@ type UnifiPoller struct {
 	ConfigFile string
 	DumpJSON   string
 	ShowVer    bool
+	Lambda     bool
 	Flag       *pflag.FlagSet
 	errorCount int
 	influx.Client
@@ -49,12 +50,14 @@ type Metrics struct {
 }
 
 // Config represents the data needed to poll a controller and report to influxdb.
+// This is all of the data stored in the config file.
 type Config struct {
 	MaxErrors  int      `json:"max_errors,_omitempty" toml:"max_errors,_omitempty" xml:"max_errors" yaml:"max_errors"`
 	Interval   Duration `json:"interval,_omitempty" toml:"interval,_omitempty" xml:"interval" yaml:"interval"`
 	Debug      bool     `json:"debug" toml:"debug" xml:"debug" yaml:"debug"`
 	Quiet      bool     `json:"quiet,_omitempty" toml:"quiet,_omitempty" xml:"quiet" yaml:"quiet"`
 	VerifySSL  bool     `json:"verify_ssl" toml:"verify_ssl" xml:"verify_ssl" yaml:"verify_ssl"`
+	Lambda     bool     `json:"lambda" toml:"lambda" xml:"lambda" yaml:"lambda"`
 	InfluxURL  string   `json:"influx_url,_omitempty" toml:"influx_url,_omitempty" xml:"influx_url" yaml:"influx_url"`
 	InfluxUser string   `json:"influx_user,_omitempty" toml:"influx_user,_omitempty" xml:"influx_user" yaml:"influx_user"`
 	InfluxPass string   `json:"influx_pass,_omitempty" toml:"influx_pass,_omitempty" xml:"influx_pass" yaml:"influx_pass"`

integrations/influxunifi/pkg/unifi-poller/helpers.go

@@ -6,30 +6,18 @@ import (
 	"strings"
 )
 
-// hasErr checks a list of errors for a non-nil.
+// LogError logs an error and increments the error counter.
-func hasErr(errs []error) bool {
+// Should be used in the poller loop.
-	for _, err := range errs {
+func (u *UnifiPoller) LogError(err error, prefix string) {
-		if err != nil {
+	if err != nil {
-			return true
+		u.errorCount++
-		}
+		_ = log.Output(2, fmt.Sprintf("[ERROR] (%v/%v) %v: %v", u.errorCount, u.MaxErrors, prefix, err))
-	}
-	return false
-}
-
-// LogErrors writes a slice of errors, with a prefix, to log-out.
-// It also increments the error counter.
-func (u *UnifiPoller) LogErrors(errs []error, prefix string) {
-	for _, err := range errs {
-		if err != nil {
-			u.errorCount++
-			_ = log.Output(2, fmt.Sprintf("[ERROR] (%v/%v) %v: %v", u.errorCount, u.MaxErrors, prefix, err))
-		}
 	}
 }
 
 // StringInSlice returns true if a string is in a slice.
-func StringInSlice(str string, slc []string) bool {
+func StringInSlice(str string, slice []string) bool {
-	for _, s := range slc {
+	for _, s := range slice {
 		if strings.EqualFold(s, str) {
 			return true
 		}
@@ -51,7 +39,7 @@ func (u *UnifiPoller) LogDebugf(m string, v ...interface{}) {
 	}
 }
 
-// LogErrorf prints an error log entry.
+// LogErrorf prints an error log entry. This is used for external library logging.
 func (u *UnifiPoller) LogErrorf(m string, v ...interface{}) {
 	_ = log.Output(2, fmt.Sprintf("[ERROR] "+m, v...))
 }

integrations/influxunifi/pkg/unifi-poller/poller.go

@@ -78,6 +78,13 @@ func (u *UnifiPoller) Run() (err error) {
 	if err = u.GetInfluxDB(); err != nil {
 		return err
 	}
+	if u.Lambda {
+		metrics, err := u.CollectMetrics()
+		if err != nil {
+			return err
+		}
+		return u.ReportMetrics(metrics)
+	}
 	return u.PollController()
 }
 

integrations/influxunifi/pkg/unifi-poller/unifi.go

@@ -42,46 +42,11 @@ FIRST:
 func (u *UnifiPoller) PollController() error {
 	log.Println("[INFO] Everything checks out! Poller started, interval:", u.Interval.Round(time.Second))
 	ticker := time.NewTicker(u.Interval.Round(time.Second))
-	var err error
 	for range ticker.C {
-		m := &Metrics{}
+		metrics, err := u.CollectMetrics()
-		// Get the sites we care about.
+		if err == nil {
-		if m.Sites, err = u.GetFilteredSites(); err != nil {
+			u.LogError(u.ReportMetrics(metrics), "reporting metrics")
-			u.LogErrors([]error{err}, "unifi.GetSites()")
 		}
-		// Get all the points.
-		if m.Clients, err = u.GetClients(m.Sites); err != nil {
-			u.LogErrors([]error{err}, "unifi.GetClients()")
-		}
-		if m.Devices, err = u.GetDevices(m.Sites); err != nil {
-			u.LogErrors([]error{err}, "unifi.GetDevices()")
-		}
-
-		// Make a new Points Batcher.
-		m.BatchPoints, err = influx.NewBatchPoints(influx.BatchPointsConfig{Database: u.InfluxDB})
-		if err != nil {
-			u.LogErrors([]error{err}, "influx.NewBatchPoints")
-			continue
-		}
-		// Batch (and send) all the points.
-		if errs := m.SendPoints(); errs != nil && hasErr(errs) {
-			u.LogErrors(errs, "asset.Points()")
-		}
-		if err := u.Write(m.BatchPoints); err != nil {
-			u.LogErrors([]error{err}, "infdb.Write(bp)")
-		}
-
-		// Talk about the data.
-		var fieldcount, pointcount int
-		for _, p := range m.Points() {
-			pointcount++
-			i, _ := p.Fields()
-			fieldcount += len(i)
-		}
-		u.Logf("UniFi Measurements Recorded. Sites: %d, Clients: %d, "+
-			"Wireless APs: %d, Gateways: %d, Switches: %d, Points: %d, Fields: %d",
-			len(m.Sites), len(m.Clients), len(m.UAPs), len(m.USGs), len(m.USWs), pointcount, fieldcount)
-
 		if u.MaxErrors >= 0 && u.errorCount > u.MaxErrors {
 			return errors.Errorf("reached maximum error count, stopping poller (%d > %d)", u.errorCount, u.MaxErrors)
 		}
@@ -89,10 +54,52 @@ func (u *UnifiPoller) PollController() error {
 	return nil
 }
 
-// SendPoints combines all device and client data into influxdb data points.
+// CollectMetrics grabs all the measurements from a UniFi controller and returns them.
+// This also creates an InfluxDB writer, and retuns error if that fails.
+func (u *UnifiPoller) CollectMetrics() (*Metrics, error) {
+	m := &Metrics{}
+	var err error
+	// Get the sites we care about.
+	m.Sites, err = u.GetFilteredSites()
+	u.LogError(err, "unifi.GetSites()")
+	// Get all the points.
+	m.Clients, err = u.GetClients(m.Sites)
+	u.LogError(err, "unifi.GetClients()")
+	m.Devices, err = u.GetDevices(m.Sites)
+	u.LogError(err, "unifi.GetDevices()")
+	// Make a new Influx Points Batcher.
+	m.BatchPoints, err = influx.NewBatchPoints(influx.BatchPointsConfig{Database: u.InfluxDB})
+	u.LogError(err, "influx.NewBatchPoints")
+	return m, err
+}
+
+// ReportMetrics batches all the metrics and writes them to InfluxDB.
+// Returns an error if the write to influx fails.
+func (u *UnifiPoller) ReportMetrics(metrics *Metrics) error {
+	// Batch (and send) all the points.
+	for _, err := range metrics.ProcessPoints() {
+		u.LogError(err, "asset.Points()")
+	}
+	err := u.Write(metrics.BatchPoints)
+	if err != nil {
+		return errors.Wrap(err, "infdb.Write(bp)")
+	}
+	var fields, points int
+	for _, p := range metrics.Points() {
+		points++
+		i, _ := p.Fields()
+		fields += len(i)
+	}
+	u.Logf("UniFi Measurements Recorded. Sites: %d, Clients: %d, "+
+		"Wireless APs: %d, Gateways: %d, Switches: %d, Points: %d, Fields: %d",
+		len(metrics.Sites), len(metrics.Clients), len(metrics.UAPs),
+		len(metrics.USGs), len(metrics.USWs), points, fields)
+	return nil
+}
+
+// ProcessPoints batches all device and client data into influxdb data points.
 // Call this after you've collected all the data you care about.
-// This sends all the batched points to InfluxDB.
+func (m *Metrics) ProcessPoints() (errs []error) {
-func (m *Metrics) SendPoints() (errs []error) {
 	for _, asset := range m.Sites {
 		errs = append(errs, m.processPoints(asset))
 	}
@@ -114,7 +121,7 @@ func (m *Metrics) SendPoints() (errs []error) {
 	return
 }
 
-// processPoints is helper function for SendPoints.
+// processPoints is helper function for ProcessPoints.
 func (m *Metrics) processPoints(asset Asset) error {
 	if asset == nil {
 		return nil