Merge pull request 'Update workflows' (#109) from atolstikhin/micro-meter-prometheus:v3 into v3

Reviewed-on: #109

counter.go

@@ -0,0 +1,93 @@
+package prometheus
+
+import (
+	"math"
+	"sync/atomic"
+	"unsafe"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+type prometheusCounter struct {
+	name string
+	c    *dto.Metric
+	n    float64
+}
+
+func (c *prometheusCounter) Add(n int) {
+	addFloat64(&(c.n), float64(n))
+}
+
+func (c *prometheusCounter) Dec() {
+	addFloat64(&(c.n), float64(-1))
+}
+
+func (c *prometheusCounter) Inc() {
+	addFloat64(&(c.n), float64(1))
+}
+
+func (c *prometheusCounter) Get() uint64 {
+	return uint64(getFloat64(&(c.n)))
+}
+
+func (c *prometheusCounter) Set(n uint64) {
+	setFloat64(&(c.n), math.Float64frombits(n))
+}
+
+type prometheusFloatCounter struct {
+	name string
+	c    *dto.Metric
+	n    float64
+}
+
+func (c *prometheusFloatCounter) Add(n float64) {
+	addFloat64(&(c.n), n)
+}
+
+func (c *prometheusFloatCounter) Dec() {
+	addFloat64(&(c.n), float64(-1))
+}
+
+func (c *prometheusFloatCounter) Inc() {
+	addFloat64(&(c.n), float64(1))
+}
+
+func (c *prometheusFloatCounter) Get() float64 {
+	return getFloat64(&(c.n))
+}
+
+func (c *prometheusFloatCounter) Set(n float64) {
+	setFloat64(&(c.n), n)
+}
+
+func (c *prometheusFloatCounter) Sub(n float64) {
+	addFloat64(&(c.n), -n)
+}
+
+func setFloat64(_addr *float64, value float64) float64 {
+	addr := (*uint64)(unsafe.Pointer(_addr))
+	for {
+		x := atomic.LoadUint64(addr)
+		if atomic.CompareAndSwapUint64(addr, x, math.Float64bits(value)) {
+			return value
+		}
+	}
+}
+
+func addFloat64(_addr *float64, delta float64) float64 {
+	addr := (*uint64)(unsafe.Pointer(_addr))
+	for {
+		x := atomic.LoadUint64(addr)
+		y := math.Float64frombits(x) + delta
+		if atomic.CompareAndSwapUint64(addr, x, math.Float64bits(y)) {
+			return y
+		}
+	}
+}
+
+func getFloat64(_addr *float64) float64 {
+	addr := (*uint64)(unsafe.Pointer(_addr))
+	x := atomic.LoadUint64(addr)
+	y := math.Float64frombits(x)
+	return y
+}

gauge.go

@@ -0,0 +1,13 @@
+package prometheus
+
+import dto "github.com/prometheus/client_model/go"
+
+type prometheusGauge struct {
+	name string
+	c    *dto.Metric
+	n    float64
+}
+
+func (c *prometheusGauge) Get() float64 {
+	return getFloat64(&(c.n))
+}

go.mod

@@ -1,22 +1,23 @@
-module go.unistack.org/micro-meter-prometheus/v4
+module go.unistack.org/micro-meter-prometheus/v3
 
-go 1.21
+go 1.22.0
-
-toolchain go1.22.0
 
 require (
-	github.com/prometheus/client_golang v1.19.0
+	github.com/prometheus/client_golang v1.20.4
-	github.com/prometheus/client_model v0.6.0
+	github.com/prometheus/client_model v0.6.1
-	github.com/prometheus/common v0.51.1
+	github.com/prometheus/common v0.59.1
-	go.unistack.org/micro/v4 v4.0.19
+	go.unistack.org/micro/v3 v3.10.91
+	google.golang.org/protobuf v1.34.2
 )
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
 	github.com/golang/protobuf v1.5.4 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
-	github.com/prometheus/procfs v0.13.0 // indirect
+	github.com/prometheus/procfs v0.15.1 // indirect
-	golang.org/x/sys v0.18.0 // indirect
+	go.unistack.org/micro-proto/v3 v3.4.1 // indirect
-	google.golang.org/protobuf v1.33.0 // indirect
+	golang.org/x/sys v0.25.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d // indirect
+	google.golang.org/grpc v1.58.2 // indirect
 )

go.sum

@@ -1,66 +1,44 @@
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
-github.com/cespare/xxhash/v2 v2.2.0 h1:DC2CZ1Ep5Y4k3ZQ899DldepgrayRUGE6BBZ/cd9Cj44=
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-github.com/cespare/xxhash/v2 v2.2.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/go-logfmt/logfmt v0.5.1/go.mod h1:WYhtIu8zTZfxdn5+rREduYbwxfcBr/Vr6KEVveWlfTs=
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histogram.go

@@ -0,0 +1,39 @@
+package prometheus
+
+import (
+	"sync/atomic"
+	"time"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+type prometheusHistogram struct {
+	name string
+	c    *dto.Metric
+}
+
+func (c prometheusHistogram) Reset() {
+}
+
+func (c prometheusHistogram) Update(n float64) {
+	atomic.AddUint64(c.c.Histogram.SampleCount, 1)
+	addFloat64(c.c.Histogram.SampleSum, n)
+	for _, b := range c.c.Histogram.Bucket {
+		if n > *b.UpperBound {
+			continue
+		}
+		atomic.AddUint64(b.CumulativeCount, 1)
+	}
+}
+
+func (c prometheusHistogram) UpdateDuration(n time.Time) {
+	x := time.Since(n).Seconds()
+	atomic.AddUint64(c.c.Histogram.SampleCount, 1)
+	addFloat64(c.c.Histogram.SampleSum, x)
+	for _, b := range c.c.Histogram.Bucket {
+		if x > *b.UpperBound {
+			continue
+		}
+		atomic.AddUint64(b.CumulativeCount, 1)
+	}
+}

prometheus.go

@@ -2,299 +2,230 @@ package prometheus
 
 import (
 	"fmt"
-	"hash/fnv"
 	"io"
 	"regexp"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/collectors"
 	dto "github.com/prometheus/client_model/go"
 	"github.com/prometheus/common/expfmt"
-	"go.unistack.org/micro/v4/meter"
+	"go.unistack.org/micro/v3/meter"
-	"go.unistack.org/micro/v4/options"
+	xpool "go.unistack.org/micro/v3/util/xpool"
+	"google.golang.org/protobuf/types/known/timestamppb"
 )
 
-var _ meter.Meter = &prometheusMeter{}
+var _ meter.Meter = (*prometheusMeter)(nil)
 
 type prometheusMeter struct {
 	opts         meter.Options
 	set          prometheus.Registerer
-	counter      map[string]*counters
+	counter      map[uint64]*prometheusCounter
-	floatCounter map[string]*floatCounters
+	floatCounter map[uint64]*prometheusFloatCounter
-	gauge        map[string]*gauges
+	gauge        map[uint64]*prometheusGauge
-	histogram    map[string]*histograms
+	histogram    map[uint64]*prometheusHistogram
-	summary      map[string]*summaries
+	summary      map[uint64]*prometheusSummary
-	sync.Mutex
+	mfPool       xpool.Pool[*dto.MetricFamily]
+	mu           sync.Mutex
 }
 
-type counters struct {
+func NewMeter(opts ...meter.Option) *prometheusMeter {
-	cs map[uint64]*prometheusCounter
-}
-
-type gauges struct {
-	cs map[uint64]*prometheusGauge
-}
-
-type histograms struct {
-	cs map[uint64]*prometheusHistogram
-}
-
-type summaries struct {
-	cs map[uint64]*prometheusSummary
-}
-
-type floatCounters struct {
-	cs map[uint64]*prometheusFloatCounter
-}
-
-/*
-func newFloat64(v float64) *float64 {
-	nv := v
-	return &nv
-}
-*/
-
-func newString(v string) *string {
-	nv := v
-	return &nv
-}
-
-func NewMeter(opts ...options.Option) *prometheusMeter {
 	return &prometheusMeter{
 		set:          prometheus.NewRegistry(), // prometheus.DefaultRegisterer,
 		opts:         meter.NewOptions(opts...),
-		counter:      make(map[string]*counters),
+		counter:      make(map[uint64]*prometheusCounter),
-		floatCounter: make(map[string]*floatCounters),
+		floatCounter: make(map[uint64]*prometheusFloatCounter),
-		gauge:        make(map[string]*gauges),
+		gauge:        make(map[uint64]*prometheusGauge),
-		histogram:    make(map[string]*histograms),
+		histogram:    make(map[uint64]*prometheusHistogram),
-		summary:      make(map[string]*summaries),
+		summary:      make(map[uint64]*prometheusSummary),
+		mfPool: xpool.NewPool[*dto.MetricFamily](func() *dto.MetricFamily {
+			return &dto.MetricFamily{}
+		}),
 	}
 }
 
-func (m *prometheusMeter) buildMetric(name string, labels ...string) string {
-	if len(m.opts.MetricPrefix) > 0 {
-		name = m.opts.MetricPrefix + name
-	}
-
-	nl := len(m.opts.Labels) + len(labels)
-	if nl == 0 {
-		return name
-	}
-
-	nlabels := make([]string, 0, nl)
-	nlabels = append(nlabels, m.opts.Labels...)
-	nlabels = append(nlabels, labels...)
-
-	if len(m.opts.LabelPrefix) == 0 {
-		return meter.BuildName(name, nlabels...)
-	}
-
-	for idx := 0; idx < nl; idx += 2 {
-		nlabels[idx] = m.opts.LabelPrefix + nlabels[idx]
-	}
-	return meter.BuildName(name, nlabels...)
-}
-
-func (m *prometheusMeter) buildName(name string) string {
-	if len(m.opts.MetricPrefix) > 0 {
-		name = m.opts.MetricPrefix + name
-	}
-	return name
-}
-
-func (m *prometheusMeter) buildLabels(labels ...string) []string {
-	nl := len(labels)
-	if nl == 0 {
-		return nil
-	}
-
-	nlabels := make([]string, 0, nl)
-
-	for idx := 0; idx < nl; idx += 2 {
-		nlabels = append(nlabels, m.opts.LabelPrefix+labels[idx])
-		nlabels = append(nlabels, labels[idx+1])
-	}
-	return nlabels
-}
-
 func (m *prometheusMeter) Name() string {
 	return m.opts.Name
 }
 
 func (m *prometheusMeter) Counter(name string, labels ...string) meter.Counter {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	nm := m.buildName(name)
+	m.mu.Lock()
-	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	c, ok := m.counter[h]
-	cd, ok := m.counter[nm]
+	// fmt.Printf("counter name %s hash %v labels %v\n", name, h, labels)
-	h := newHash(labels)
+	m.mu.Unlock()
 	if !ok {
-		cd = &counters{cs: make(map[uint64]*prometheusCounter)}
+		var n float64
-		c := &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		c = &prometheusCounter{
-		cd.cs[h] = c
+			name: name,
-		m.counter[nm] = cd
+			c: &dto.Metric{
-		return c
+				Gauge: &dto.Gauge{Value: &n},
+				Label: labelMetric(clabels),
+			},
 		}
-	c, ok := cd.cs[h]
+		m.mu.Lock()
-	if !ok {
+		m.counter[h] = c
-		c = &prometheusCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		m.mu.Unlock()
-		cd.cs[h] = c
-		m.counter[nm] = cd
 	}
 	return c
 }
 
 func (m *prometheusMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	nm := m.buildName(name)
+	m.mu.Lock()
-	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	c, ok := m.floatCounter[h]
-	cd, ok := m.floatCounter[nm]
+	m.mu.Unlock()
-	h := newHash(labels)
 	if !ok {
-		cd = &floatCounters{cs: make(map[uint64]*prometheusFloatCounter)}
+		var n float64
-		c := &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		c = &prometheusFloatCounter{
-		cd.cs[h] = c
+			name: name,
-		m.floatCounter[nm] = cd
+			c: &dto.Metric{
-		return c
+				Gauge: &dto.Gauge{Value: &n},
+				Label: labelMetric(clabels),
+			},
 		}
-	c, ok := cd.cs[h]
+		m.mu.Lock()
-	if !ok {
+		m.floatCounter[h] = c
-		c = &prometheusFloatCounter{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		m.mu.Unlock()
-		cd.cs[h] = c
-		m.floatCounter[nm] = cd
 	}
 	return c
 }
 
 func (m *prometheusMeter) Gauge(name string, fn func() float64, labels ...string) meter.Gauge {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	nm := m.buildName(name)
+	m.mu.Lock()
-	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	c, ok := m.gauge[h]
-	cd, ok := m.gauge[nm]
+	m.mu.Unlock()
-	h := newHash(labels)
 	if !ok {
-		cd = &gauges{cs: make(map[uint64]*prometheusGauge)}
+		var n float64
-		c := &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		c = &prometheusGauge{
-		cd.cs[h] = c
+			name: name,
-		m.gauge[nm] = cd
+			c: &dto.Metric{
-		return c
+				Gauge: &dto.Gauge{Value: &n},
+				Label: labelMetric(clabels),
+			},
 		}
-	c, ok := cd.cs[h]
+		m.mu.Lock()
-	if !ok {
+		m.gauge[h] = c
-		c = &prometheusGauge{c: prometheus.NewGauge(prometheus.GaugeOpts{Name: nm}), labels: labels}
+		m.mu.Unlock()
-		cd.cs[h] = c
-		m.gauge[nm] = cd
 	}
 	return c
 }
 
 func (m *prometheusMeter) Histogram(name string, labels ...string) meter.Histogram {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	nm := m.buildName(name)
+	m.mu.Lock()
-	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	c, ok := m.histogram[h]
-	cd, ok := m.histogram[nm]
+	m.mu.Unlock()
-	h := newHash(labels)
 	if !ok {
-		cd = &histograms{cs: make(map[uint64]*prometheusHistogram)}
+		var n uint64
-		c := &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
+		var s float64
-		cd.cs[h] = c
+		buckets := make([]float64, len(prometheus.DefBuckets))
-		m.histogram[nm] = cd
+		copy(buckets, prometheus.DefBuckets)
-		return c
+		mdto := &dto.Metric{
+			Histogram: &dto.Histogram{
+				SampleCount:      &n,
+				SampleSum:        &s,
+				CreatedTimestamp: timestamppb.Now(),
+				Bucket:           make([]*dto.Bucket, len(buckets)),
+			},
+			Label: labelMetric(clabels),
 		}
-	c, ok := cd.cs[h]
+		for idx, b := range buckets {
-	if !ok {
+			var cc uint64
-		c = &prometheusHistogram{c: prometheus.NewHistogram(prometheus.HistogramOpts{Name: nm}), labels: labels}
+			mdto.Histogram.Bucket[idx] = &dto.Bucket{CumulativeCount: &cc, UpperBound: &b}
-		cd.cs[h] = c
+		}
-		m.histogram[nm] = cd
+		c = &prometheusHistogram{
+			name: name,
+			c:    mdto,
+		}
+		m.mu.Lock()
+		m.histogram[h] = c
+		m.mu.Unlock()
 	}
 	return c
 }
 
 func (m *prometheusMeter) Summary(name string, labels ...string) meter.Summary {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	nm := m.buildName(name)
+	m.mu.Lock()
-	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	c, ok := m.summary[h]
-	cd, ok := m.summary[nm]
+	m.mu.Unlock()
-	h := newHash(labels)
 	if !ok {
-		cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
+		var n uint64
-		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
+		var s float64
-		cd.cs[h] = c
+		c = &prometheusSummary{
-		m.summary[nm] = cd
+			name: name,
-		return c
+			c: &dto.Metric{
+				Summary: &dto.Summary{
+					SampleCount:      &n,
+					SampleSum:        &s,
+					CreatedTimestamp: timestamppb.Now(),
+				},
+				Label: labelMetric(clabels),
+			},
 		}
-	c, ok := cd.cs[h]
+		m.mu.Lock()
-	if !ok {
+		m.summary[h] = c
-		c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{Name: nm}), labels: labels}
+		m.mu.Unlock()
-		cd.cs[h] = c
-		m.summary[nm] = cd
 	}
 	return c
 }
 
 func (m *prometheusMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
-	m.Lock()
+	clabels := meter.BuildLabels(append(m.opts.Labels, labels...)...)
-	defer m.Unlock()
+	h := newHash(name, clabels)
-	nm := m.buildName(name)
+	m.mu.Lock()
-	labels = m.buildLabels(append(m.opts.Labels, labels...)...)
+	c, ok := m.summary[h]
-	cd, ok := m.summary[nm]
+	m.mu.Lock()
-	h := newHash(labels)
 	if !ok {
-		cd = &summaries{cs: make(map[uint64]*prometheusSummary)}
+		var n uint64
-		c := &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
+		var s float64
-			Name:       nm,
+		c = &prometheusSummary{
-			MaxAge:     window,
+			name: name,
-			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
+			c: &dto.Metric{
-		}), labels: labels}
+				Summary: &dto.Summary{
-		cd.cs[h] = c
+					SampleCount: &n,
-		m.summary[nm] = cd
+					SampleSum:   &s,
-		return c
+				},
+				Label: labelMetric(clabels),
+			},
 		}
-	c, ok := cd.cs[h]
+		m.mu.Lock()
-	if !ok {
+		m.summary[h] = c
-		c = &prometheusSummary{c: prometheus.NewSummary(prometheus.SummaryOpts{
+		m.mu.Unlock()
-			Name:       nm,
-			MaxAge:     window,
-			Objectives: map[float64]float64{0.5: 0.05, 0.9: 0.01, 0.99: 0.001},
-		}), labels: labels}
-		cd.cs[h] = c
-		m.summary[nm] = cd
 	}
 	return c
 }
 
-func (m *prometheusMeter) Init(opts ...options.Option) error {
+func (m *prometheusMeter) Init(opts ...meter.Option) error {
-	var err error
 	for _, o := range opts {
-		if err = o(&m.opts); err != nil {
+		o(&m.opts)
-			return err
-		}
-	}
-	return nil
-}
-
-func (m *prometheusMeter) Write(w io.Writer, opts ...options.Option) error {
-	var err error
-	options := m.opts
-	for _, o := range opts {
-		if err = o(&options); err != nil {
-			return err
-		}
 	}
 
-	if options.WriteProcessMetrics || options.WriteFDMetrics {
+	if m.opts.WriteProcessMetrics || m.opts.WriteFDMetrics {
 		pc := collectors.NewProcessCollector(collectors.ProcessCollectorOpts{})
 		_ = m.set.Register(pc)
 		gc := collectors.NewGoCollector(collectors.WithGoCollectorRuntimeMetrics(collectors.GoRuntimeMetricsRule{Matcher: regexp.MustCompile("/.*")}))
 		_ = m.set.Register(gc)
 	}
 
+	return nil
+}
+
+func (m *prometheusMeter) Write(w io.Writer, opts ...meter.Option) error {
+	options := m.opts
+	for _, o := range opts {
+		o(&options)
+	}
+
 	g, ok := m.set.(prometheus.Gatherer)
 	if !ok {
 		return fmt.Errorf("set type %T not prometheus.Gatherer", m.set)
@@ -307,83 +238,64 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...options.Option) error {
 
 	enc := expfmt.NewEncoder(w, expfmt.NewFormat(expfmt.TypeTextPlain))
 
-	for name, metrics := range m.counter {
+	m.mu.Lock()
-		mf := &dto.MetricFamily{
+
-			Name:   newString(name),
+	for _, mc := range m.counter {
-			Type:   dto.MetricType_GAUGE.Enum(),
+		mf := m.mfPool.Get()
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		mf.Name = &mc.name
-		}
+		mf.Type = dto.MetricType_GAUGE.Enum()
-		for _, c := range metrics.cs {
+		n := getFloat64(&(mc.n))
-			m := &dto.Metric{}
+		mc.c.Gauge.Value = &n
-			_ = c.c.Write(m)
+		mf.Metric = append(mf.Metric, mc.c)
-			fillMetric(m, c.labels)
-			mf.Metric = append(mf.Metric, m)
-		}
 		mfs = append(mfs, mf)
 	}
 
-	for name, metrics := range m.gauge {
+	for _, mc := range m.floatCounter {
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name:   newString(name),
+		mf.Name = &mc.name
-			Type:   dto.MetricType_GAUGE.Enum(),
+		mf.Type = dto.MetricType_GAUGE.Enum()
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		n := getFloat64(&(mc.n))
-		}
+		mc.c.Gauge.Value = &n
-		for _, c := range metrics.cs {
+		mf.Metric = append(mf.Metric, mc.c)
-			m := &dto.Metric{}
-			_ = c.c.Write(m)
-			fillMetric(m, c.labels)
-			mf.Metric = append(mf.Metric, m)
-		}
 		mfs = append(mfs, mf)
 	}
 
-	for name, metrics := range m.floatCounter {
+	for _, mc := range m.gauge {
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name:   newString(name),
+		mf.Name = &mc.name
-			Type:   dto.MetricType_GAUGE.Enum(),
+		mf.Type = dto.MetricType_GAUGE.Enum()
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		n := getFloat64(&(mc.n))
-		}
+		mc.c.Gauge.Value = &n
-		for _, c := range metrics.cs {
+		mf.Metric = append(mf.Metric, mc.c)
-			m := &dto.Metric{}
-			_ = c.c.Write(m)
-			fillMetric(m, c.labels)
-			mf.Metric = append(mf.Metric, m)
-		}
 		mfs = append(mfs, mf)
 	}
 
-	for name, metrics := range m.histogram {
+	for _, c := range m.histogram {
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name:   newString(name),
+		mf.Name = &c.name
-			Type:   dto.MetricType_HISTOGRAM.Enum(),
+		mf.Type = dto.MetricType_HISTOGRAM.Enum()
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		mf.Metric = append(mf.Metric, c.c)
-		}
-		for _, c := range metrics.cs {
-			m := &dto.Metric{}
-			_ = c.c.Write(m)
-			fillMetric(m, c.labels)
-			mf.Metric = append(mf.Metric, m)
-		}
 		mfs = append(mfs, mf)
 	}
 
-	for name, metrics := range m.summary {
+	for _, mc := range m.summary {
-		mf := &dto.MetricFamily{
+		mf := m.mfPool.Get()
-			Name:   newString(name),
+		mf.Name = &mc.name
-			Type:   dto.MetricType_SUMMARY.Enum(),
+		mf.Type = dto.MetricType_SUMMARY.Enum()
-			Metric: make([]*dto.Metric, 0, len(metrics.cs)),
+		sc := atomic.LoadUint64(&(mc.sampleCount))
-		}
+		mc.c.Summary.SampleCount = &sc
-		for _, c := range metrics.cs {
+		ss := getFloat64(&(mc.SampleSum))
-			m := &dto.Metric{}
+		mc.c.Summary.SampleSum = &ss
-			_ = c.c.Write(m)
+		mf.Metric = append(mf.Metric, mc.c)
-			fillMetric(m, c.labels)
-			mf.Metric = append(mf.Metric, m)
-		}
 		mfs = append(mfs, mf)
 	}
 
+	m.mu.Unlock()
+
 	for _, mf := range mfs {
 		_ = enc.Encode(mf)
+		mf.Reset()
+		m.mfPool.Put(mf)
 	}
 
 	if closer, ok := enc.(io.Closer); ok {
@@ -393,10 +305,10 @@ func (m *prometheusMeter) Write(w io.Writer, opts ...options.Option) error {
 	return nil
 }
 
-func (m *prometheusMeter) Clone(opts ...options.Option) meter.Meter {
+func (m *prometheusMeter) Clone(opts ...meter.Option) meter.Meter {
 	options := m.opts
 	for _, o := range opts {
-		_ = o(&options)
+		o(&options)
 	}
 
 	return &prometheusMeter{
@@ -418,127 +330,39 @@ func (m *prometheusMeter) String() string {
 	return "prometheus"
 }
 
-func (m *prometheusMeter) Set(opts ...options.Option) meter.Meter {
+func (m *prometheusMeter) Set(opts ...meter.Option) meter.Meter {
 	nm := &prometheusMeter{opts: m.opts}
 	for _, o := range opts {
-		_ = o(&nm.opts)
+		o(&nm.opts)
 	}
 	nm.set = prometheus.NewRegistry()
 	return nm
 }
 
-type prometheusCounter struct {
+func labelMetric(labels []string) []*dto.LabelPair {
-	c      prometheus.Gauge
+	nl := make([]string, len(labels))
-	labels []string
+	copy(nl, labels)
-}
+	dtoLabels := make([]*dto.LabelPair, 0, len(nl)/2)
-
+	for idx := 0; idx < len(nl); idx += 2 {
-func (c *prometheusCounter) Add(n int) {
+		dtoLabels = append(dtoLabels, &dto.LabelPair{
-	c.c.Add(float64(n))
+			Name:  &(nl[idx]),
-}
+			Value: &(nl[idx+1]),
-
-func (c *prometheusCounter) Dec() {
-	c.c.Dec()
-}
-
-func (c *prometheusCounter) Inc() {
-	c.c.Inc()
-}
-
-func (c *prometheusCounter) Get() uint64 {
-	m := &dto.Metric{}
-	if err := c.c.Write(m); err != nil {
-		return 0
-	}
-	return uint64(m.GetGauge().GetValue())
-}
-
-func (c *prometheusCounter) Set(n uint64) {
-	c.c.Set(float64(n))
-}
-
-type prometheusFloatCounter struct {
-	c      prometheus.Gauge
-	labels []string
-}
-
-func (c prometheusFloatCounter) Add(n float64) {
-	c.c.Add(n)
-}
-
-func (c prometheusFloatCounter) Get() float64 {
-	m := &dto.Metric{}
-	if err := c.c.Write(m); err != nil {
-		return 0
-	}
-	return m.GetGauge().GetValue()
-}
-
-func (c prometheusFloatCounter) Set(n float64) {
-	c.c.Set(n)
-}
-
-func (c prometheusFloatCounter) Sub(n float64) {
-	c.c.Add(-n)
-}
-
-type prometheusGauge struct {
-	c      prometheus.Gauge
-	labels []string
-}
-
-func (c prometheusGauge) Get() float64 {
-	m := &dto.Metric{}
-	if err := c.c.Write(m); err != nil {
-		return 0
-	}
-	return float64(m.GetGauge().GetValue())
-}
-
-type prometheusHistogram struct {
-	c      prometheus.Histogram
-	labels []string
-}
-
-func (c prometheusHistogram) Reset() {
-}
-
-func (c prometheusHistogram) Update(n float64) {
-	c.c.Observe(n)
-}
-
-func (c prometheusHistogram) UpdateDuration(n time.Time) {
-	c.c.Observe(time.Since(n).Seconds())
-}
-
-type prometheusSummary struct {
-	c      prometheus.Summary
-	labels []string
-}
-
-func (c prometheusSummary) Update(n float64) {
-	c.c.Observe(n)
-}
-
-func (c prometheusSummary) UpdateDuration(n time.Time) {
-	c.c.Observe(time.Since(n).Seconds())
-}
-
-func newHash(labels []string) uint64 {
-	labels = meter.BuildLabels(labels...)
-	h := fnv.New64a()
-	for _, l := range labels {
-		h.Write([]byte(l))
-	}
-	return h.Sum64()
-}
-
-func fillMetric(m *dto.Metric, labels []string) *dto.Metric {
-	m.Label = make([]*dto.LabelPair, 0, len(labels)/2)
-	for idx := 0; idx < len(labels); idx += 2 {
-		m.Label = append(m.Label, &dto.LabelPair{
-			Name:  newString(labels[idx]),
-			Value: newString(labels[idx+1]),
 		})
 	}
-	return m
+	return dtoLabels
+}
+
+func newHash(n string, l []string) uint64 {
+	h := uint64(14695981039346656037)
+	for i := 0; i < len(n); i++ {
+		h ^= uint64(n[i])
+		h *= 1099511628211
+	}
+	for _, s := range l {
+		for i := 0; i < len(s); i++ {
+			h ^= uint64(s[i])
+			h *= 1099511628211
+		}
+	}
+	return h
 }

prometheus_test.go

@@ -3,14 +3,125 @@ package prometheus
 import (
 	"bytes"
 	"context"
+	"fmt"
 	"testing"
 
-	"go.unistack.org/micro/v4/client"
+	"github.com/prometheus/client_golang/prometheus"
-	"go.unistack.org/micro/v4/codec"
+	dto "github.com/prometheus/client_model/go"
-	"go.unistack.org/micro/v4/meter"
+	"github.com/prometheus/common/expfmt"
-	"go.unistack.org/micro/v4/meter/wrapper"
+	"go.unistack.org/micro/v3/client"
+	"go.unistack.org/micro/v3/codec"
+	"go.unistack.org/micro/v3/meter"
 )
 
+func TestHash(t *testing.T) {
+	m := NewMeter() // meter.Labels("test_key", "test_val"))
+
+	buf := bytes.NewBuffer(nil)
+
+	for i := 0; i < 100000; i++ {
+		go func() {
+			m.Counter("micro_server_request_total", "code", "16",
+				"endpoint", "/clientprofile.ClientProfileService/GetClientProfile",
+				"status", "failure").Inc()
+			m.Counter("micro_server_request_total", "code", "16",
+				"endpoint", "/clientproduct.ClientProductService/GetDepositProducts",
+				"status", "failure").Inc()
+			m.Counter("micro_server_request_total", "code", "16",
+				"endpoint", "/operationsinfo.OperationsInfoService/GetOperations",
+				"status", "failure").Inc()
+		}()
+	}
+	_ = m.Write(buf)
+	t.Logf("h1: %s\n", buf.Bytes())
+}
+
+func TestHistogram(t *testing.T) {
+	m := NewMeter()
+	name := "test"
+	m.Histogram(name, "endpoint").Update(1)
+	m.Histogram(name, "endpoint").Update(1)
+	m.Histogram(name, "endpoint").Update(5)
+	m.Histogram(name, "endpoint").Update(10)
+	m.Histogram(name, "endpoint").Update(10)
+	m.Histogram(name, "endpoint").Update(30)
+	mbuf := bytes.NewBuffer(nil)
+	_ = m.Write(mbuf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
+
+	/*
+		if !bytes.Contains(buf.Bytes(), []byte(`micro_server_sum{endpoint="ep1",path="/path1"} 20`)) {
+			t.Fatalf("invalid metrics output: %s", buf.Bytes())
+		}
+
+		if !bytes.Contains(buf.Bytes(), []byte(`micro_server_count{endpoint="ep1",path="/path1"} 2`)) {
+			t.Fatalf("invalid metrics output: %s", buf.Bytes())
+		}
+	*/
+	p := prometheus.NewHistogram(prometheus.HistogramOpts{Name: name})
+	p.Observe(1)
+	p.Observe(1)
+	p.Observe(5)
+	p.Observe(10)
+	p.Observe(10)
+	p.Observe(30)
+	mdto := &dto.Metric{}
+	_ = p.Write(mdto)
+	pbuf := bytes.NewBuffer(nil)
+	enc := expfmt.NewEncoder(pbuf, expfmt.NewFormat(expfmt.TypeTextPlain))
+	mf := &dto.MetricFamily{Name: &name, Type: dto.MetricType_HISTOGRAM.Enum(), Metric: []*dto.Metric{mdto}}
+	_ = enc.Encode(mf)
+
+	if !bytes.Equal(mbuf.Bytes(), pbuf.Bytes()) {
+		fmt.Printf("m\n%s\n", mbuf.Bytes())
+		fmt.Printf("m\n%s\n", pbuf.Bytes())
+	}
+}
+
+func TestSummary(t *testing.T) {
+	t.Skip()
+	name := "micro_server"
+	m := NewMeter()
+	m.Summary("micro_server").Update(1)
+	m.Summary("micro_server").Update(1)
+	m.Summary("micro_server").Update(5)
+	m.Summary("micro_server").Update(10)
+	m.Summary("micro_server").Update(10)
+	m.Summary("micro_server").Update(30)
+	mbuf := bytes.NewBuffer(nil)
+	_ = m.Write(mbuf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
+
+	if !bytes.Contains(mbuf.Bytes(), []byte(`micro_server_sum 57`)) {
+		t.Fatalf("invalid metrics output: %s", mbuf.Bytes())
+	}
+
+	if !bytes.Contains(mbuf.Bytes(), []byte(`micro_server_count 6`)) {
+		t.Fatalf("invalid metrics output: %s", mbuf.Bytes())
+	}
+
+	objectives := make(map[float64]float64)
+	for _, c := range meter.DefaultSummaryQuantiles {
+		objectives[c] = c
+	}
+	p := prometheus.NewSummary(prometheus.SummaryOpts{Name: name, Objectives: objectives, MaxAge: meter.DefaultSummaryWindow})
+	p.Observe(1)
+	p.Observe(1)
+	p.Observe(5)
+	p.Observe(10)
+	p.Observe(10)
+	p.Observe(30)
+	mdto := &dto.Metric{}
+	_ = p.Write(mdto)
+	pbuf := bytes.NewBuffer(nil)
+	enc := expfmt.NewEncoder(pbuf, expfmt.NewFormat(expfmt.TypeTextPlain))
+	mf := &dto.MetricFamily{Name: &name, Type: dto.MetricType_SUMMARY.Enum(), Metric: []*dto.Metric{mdto}}
+	_ = enc.Encode(mf)
+
+	if !bytes.Equal(mbuf.Bytes(), pbuf.Bytes()) {
+		fmt.Printf("m\n%s\n", mbuf.Bytes())
+		fmt.Printf("m\n%s\n", pbuf.Bytes())
+	}
+}
+
 func TestStd(t *testing.T) {
 	m := NewMeter(meter.WriteProcessMetrics(true), meter.WriteFDMetrics(true))
 	if err := m.Init(); err != nil {
@@ -23,32 +134,12 @@ func TestStd(t *testing.T) {
 	}
 }
 
-func TestBuildName(t *testing.T) {
-	m := NewMeter()
-	check := `micro_foo{micro_aaa="b",micro_bar="baz",micro_ccc="d"}`
-	name := m.buildMetric("foo", "bar", "baz", "aaa", "b", "ccc", "d")
-	if name != check {
-		t.Fatalf("metric name error: %s != %s", name, check)
-	}
-
-	cnt := m.Counter("counter", "key", "val")
-	cnt.Inc()
-}
-
 func TestWrapper(t *testing.T) {
-	t.Skip()
 	m := NewMeter() // meter.Labels("test_key", "test_val"))
 
-	w := wrapper.NewClientWrapper(
-		wrapper.ServiceName("svc1"),
-		wrapper.ServiceVersion("0.0.1"),
-		wrapper.ServiceID("12345"),
-		wrapper.Meter(m),
-	)
-	_ = w
 	ctx := context.Background()
 
-	c := client.NewClient()
+	c := client.NewClient(client.Meter(m))
 	if err := c.Init(); err != nil {
 		t.Fatal(err)
 	}
@@ -58,7 +149,7 @@ func TestWrapper(t *testing.T) {
 	_, _ = rsp, err
 	buf := bytes.NewBuffer(nil)
 	_ = m.Write(buf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
-	if !bytes.Contains(buf.Bytes(), []byte(`micro_client_request_inflight{micro_endpoint="svc2.Service.Method"} 0`)) {
+	if !bytes.Contains(buf.Bytes(), []byte(`micro_client_request_inflight{endpoint="Service.Method"} 0`)) {
 		t.Fatalf("invalid metrics output: %s", buf.Bytes())
 	}
 }
@@ -66,18 +157,20 @@ func TestWrapper(t *testing.T) {
 func TestMultiple(t *testing.T) {
 	m := NewMeter() // meter.Labels("test_key", "test_val"))
 
-	m.Counter("server", "endpoint", "ep1", "path", "/path1").Inc()
+	m.Counter("micro_server", "endpoint", "ep1", "path", "/path1").Inc()
-	m.Counter("server", "endpoint", "ep1", "path", "/path1").Inc()
+	m.Counter("micro_server", "endpoint", "ep1", "path", "/path1").Inc()
 
-	m.Counter("server", "endpoint", "ep2", "path", "/path2").Inc()
+	m.Counter("micro_server", "endpoint", "ep2", "path", "/path2").Inc()
-	m.Counter("server", "endpoint", "ep2", "path", "/path2").Inc()
+	m.Counter("micro_server", "endpoint", "ep2", "path", "/path2").Inc()
 
-	m.Counter("server", "endpoint", "ep3", "path", "/path3", "status", "success").Inc()
+	m.Counter("micro_server", "endpoint", "ep3", "path", "/path3", "status", "success").Inc()
 
 	buf := bytes.NewBuffer(nil)
 	_ = m.Write(buf, meter.WriteProcessMetrics(false), meter.WriteFDMetrics(false))
-	if !bytes.Contains(buf.Bytes(), []byte(`micro_server{micro_endpoint="ep1",micro_path="/path1"} 2`)) {
+	if !bytes.Contains(buf.Bytes(), []byte(`micro_server{endpoint="ep1",path="/path1"} 2`)) {
-		// t.Fatal("XXXX")
+		t.Fatalf("invalid metrics output: %s", buf.Bytes())
+	}
+	if !bytes.Contains(buf.Bytes(), []byte(`micro_server{endpoint="ep3",path="/path3",status="success"} 1`)) {
 		t.Fatalf("invalid metrics output: %s", buf.Bytes())
 	}
 }

summary.go

@@ -0,0 +1,26 @@
+package prometheus
+
+import (
+	"sync/atomic"
+	"time"
+
+	dto "github.com/prometheus/client_model/go"
+)
+
+type prometheusSummary struct {
+	name        string
+	c           *dto.Metric
+	sampleCount uint64
+	SampleSum   float64
+}
+
+func (c *prometheusSummary) Update(n float64) {
+	atomic.AddUint64(&(c.sampleCount), 1)
+	addFloat64(&(c.SampleSum), n)
+}
+
+func (c *prometheusSummary) UpdateDuration(t time.Time) {
+	n := time.Since(t).Seconds()
+	atomic.AddUint64(&(c.sampleCount), 1)
+	addFloat64(&(c.SampleSum), n)
+}