metric 제거

metric/prometheus.go

@@ -1,161 +0,0 @@
-package metric
-
-import (
-	"context"
-	"math"
-	"sync/atomic"
-
-	"github.com/prometheus/client_golang/prometheus"
-	"repositories.action2quare.com/ayo/gocommon/logger"
-)
-
-const (
-	METRIC_HEAD_INLINE = byte(14)
-	METRIC_TAIL_INLINE = byte(15)
-)
-
-type MetricType int
-
-const (
-	MetricCounter   = MetricType(1)
-	MetricGuage     = MetricType(2)
-	metric_key_size = 8
-)
-
-func convertValueType(in MetricType) prometheus.ValueType {
-	switch in {
-	case MetricCounter:
-		return prometheus.CounterValue
-
-	case MetricGuage:
-		return prometheus.GaugeValue
-	}
-
-	return prometheus.UntypedValue
-}
-
-type writeRequest struct {
-	key string
-	val float64
-}
-
-type prometheusMetricDesc struct {
-	*prometheus.Desc
-	valueType prometheus.ValueType
-	valptr    *uint64
-	key       string
-}
-
-type prometheusExporter struct {
-	writerChan   chan *writeRequest
-	registerChan chan *prometheusMetricDesc
-	namespace    string
-	cancel       context.CancelFunc
-}
-
-func (pe *prometheusExporter) RegisterMetric(nm *MetricDescription) {
-	pe.registerChan <- &prometheusMetricDesc{
-		Desc:      prometheus.NewDesc(prometheus.BuildFQName(pe.namespace, "", nm.Name), nm.Help, nil, nm.ConstLabels),
-		valueType: convertValueType(nm.Type),
-		valptr:    new(uint64),
-		key:       nm.Key,
-	}
-}
-
-func (pe *prometheusExporter) UpdateMetric(key string, val float64) {
-	pe.writerChan <- &writeRequest{key: key, val: val}
-}
-
-func (pe *prometheusExporter) Shutdown() {
-	if pe.cancel != nil {
-		pe.cancel()
-	}
-}
-
-type prometheusCollector struct {
-	metrics map[string]*prometheusMetricDesc
-}
-
-func (pc *prometheusCollector) Describe(ch chan<- *prometheus.Desc) {
-	for _, v := range pc.metrics {
-		ch <- v.Desc
-	}
-}
-
-func (pc *prometheusCollector) Collect(ch chan<- prometheus.Metric) {
-	for _, v := range pc.metrics {
-		cm, err := prometheus.NewConstMetric(v.Desc, v.valueType, math.Float64frombits(atomic.LoadUint64(v.valptr)))
-		if err == nil {
-			ch <- cm
-		}
-	}
-}
-
-func (pe *prometheusExporter) loop(ctx context.Context) {
-	defer func() {
-		r := recover()
-		if r != nil {
-			logger.Error(r)
-		}
-	}()
-
-	var collector *prometheusCollector
-	defer func() {
-		if collector != nil {
-			prometheus.Unregister(collector)
-		}
-	}()
-
-	for {
-		select {
-		case <-ctx.Done():
-			return
-
-		case req := <-pe.writerChan:
-			if collector != nil {
-				if m := collector.metrics[req.key]; m != nil {
-					atomic.StoreUint64(m.valptr, math.Float64bits(req.val))
-				}
-			}
-
-		case nm := <-pe.registerChan:
-			var nextmetrics map[string]*prometheusMetricDesc
-			if collector != nil {
-				nextmetrics = collector.metrics
-				prometheus.Unregister(collector)
-				nextmetrics[nm.key] = nm
-			} else {
-				nextmetrics = map[string]*prometheusMetricDesc{
-					nm.key: nm,
-				}
-			}
-
-			nextcollector := &prometheusCollector{
-				metrics: nextmetrics,
-			}
-
-			if err := prometheus.Register(nextcollector); err != nil {
-				if _, ok := err.(prometheus.AlreadyRegisteredError); ok {
-					// 이미 등록된 metric. child process를 여럿 실행하면 발생됨
-				} else {
-					logger.Error("prometheus register err :", *nm, err)
-				}
-			} else {
-				collector = nextcollector
-			}
-		}
-	}
-}
-
-func NewPrometheusExport(namespace string) Exporter {
-	ctx, cancel := context.WithCancel(context.Background())
-	exp := &prometheusExporter{
-		registerChan: make(chan *prometheusMetricDesc, 10),
-		writerChan:   make(chan *writeRequest, 100),
-		namespace:    namespace,
-		cancel:       cancel,
-	}
-
-	go exp.loop(ctx)
-	return exp
-}