fix clone with prometheus compat mode

Signed-off-by: Vasiliy Tolstov <v.tolstov@unistack.org>

go.mod

@@ -5,7 +5,7 @@ go 1.22
 toolchain go1.23.2
 
 require (
-	github.com/VictoriaMetrics/metrics v1.35.1
+	go.unistack.org/metrics v0.0.1
 	go.unistack.org/micro/v3 v3.10.100
 )
 

go.sum

@@ -1,9 +1,9 @@
-github.com/VictoriaMetrics/metrics v1.35.1 h1:o84wtBKQbzLdDy14XeskkCZih6anG+veZ1SwJHFGwrU=
-github.com/VictoriaMetrics/metrics v1.35.1/go.mod h1:r7hveu6xMdUACXvB8TYdAj8WEsKzWB0EkpJN+RDtOf8=
 github.com/valyala/fastrand v1.1.0 h1:f+5HkLW4rsgzdNoleUOB69hyT9IlD2ZQh9GyDMfb5G8=
 github.com/valyala/fastrand v1.1.0/go.mod h1:HWqCzkrkg6QXT8V2EXWvXCoow7vLwOFN002oeRzjapQ=
 github.com/valyala/histogram v1.2.0 h1:wyYGAZZt3CpwUiIb9AU/Zbllg1llXyrtApRS815OLoQ=
 github.com/valyala/histogram v1.2.0/go.mod h1:Hb4kBwb4UxsaNbbbh+RRz8ZR6pdodR57tzWUS3BUzXY=
+go.unistack.org/metrics v0.0.1 h1:sCnGO059ZccGC/D34iRH121eSk+7ci5+OY9cl5K7GKY=
+go.unistack.org/metrics v0.0.1/go.mod h1:1FY4R7EKJa9Oz2D6wlGScNerpl6igRs9Cx/3et4Rgs4=
 go.unistack.org/micro/v3 v3.10.100 h1:yWOaU0ImCGm5k5MUzlIobJUOr+KLfrR/BoDZvcHyKxM=
 go.unistack.org/micro/v3 v3.10.100/go.mod h1:YzMldzHN9Ei+zy5t/Psu7RUWDZwUfrNYiStSQtTz90g=
 golang.org/x/sys v0.27.0 h1:wBqf8DvsY9Y/2P8gAfPDEYNuS30J4lPHJxXSb/nJZ+s=

victoriametrics.go

@@ -4,105 +4,129 @@ import (
 	"io"
 	"time"
 
-	"github.com/VictoriaMetrics/metrics"
+	"go.unistack.org/metrics"
 	"go.unistack.org/micro/v3/meter"
 )
 
 type victoriametricsMeter struct {
 	set              *metrics.Set
 	opts             meter.Options
+	prometheusCompat bool
+}
+
+type prometheusCompatKey struct{}
+
+func PrometheusCompat(b bool) meter.Option {
+	return meter.SetOption(prometheusCompatKey{}, b)
 }
 
 func NewMeter(opts ...meter.Option) meter.Meter {
-	return &victoriametricsMeter{set: metrics.NewSet(), opts: meter.NewOptions(opts...)}
+	m := &victoriametricsMeter{set: metrics.NewSet(), opts: meter.NewOptions(opts...)}
+	if v, ok := m.opts.Context.Value(prometheusCompatKey{}).(bool); ok {
+		m.prometheusCompat = v
+	}
+	return m
 }
 
-func (r *victoriametricsMeter) Name() string {
-	return r.opts.Name
+func (m *victoriametricsMeter) Name() string {
+	return m.opts.Name
 }
 
-func (r *victoriametricsMeter) Clone(opts ...meter.Option) meter.Meter {
-	options := r.opts
+func (m *victoriametricsMeter) Clone(opts ...meter.Option) meter.Meter {
+	options := m.opts
 	for _, o := range opts {
 		o(&options)
 	}
-	return &victoriametricsMeter{set: r.set, opts: options}
+	nm := &victoriametricsMeter{set: m.set, opts: options, prometheusCompat: m.prometheusCompat}
+	if v, ok := m.opts.Context.Value(prometheusCompatKey{}).(bool); ok {
+		m.prometheusCompat = v
+	}
+	return nm
 }
 
-func (r *victoriametricsMeter) buildName(name string, labels ...string) string {
-	nl := len(r.opts.Labels) + len(labels)
+func (m *victoriametricsMeter) buildName(name string, labels ...string) string {
+	nl := len(m.opts.Labels) + len(labels)
 	if nl == 0 {
 		return name
 	}
 
 	nlabels := make([]string, 0, nl)
-	nlabels = append(nlabels, r.opts.Labels...)
+	nlabels = append(nlabels, m.opts.Labels...)
 	nlabels = append(nlabels, labels...)
 
 	return meter.BuildName(name, nlabels...)
 }
 
-func (r *victoriametricsMeter) Counter(name string, labels ...string) meter.Counter {
-	return r.set.GetOrCreateCounter(r.buildName(name, labels...))
+func (m *victoriametricsMeter) Counter(name string, labels ...string) meter.Counter {
+	return m.set.GetOrCreateCounter(m.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
-	return r.set.GetOrCreateFloatCounter(r.buildName(name, labels...))
+func (m *victoriametricsMeter) FloatCounter(name string, labels ...string) meter.FloatCounter {
+	return m.set.GetOrCreateFloatCounter(m.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) Gauge(name string, f func() float64, labels ...string) meter.Gauge {
-	return r.set.GetOrCreateGauge(r.buildName(name, labels...), f)
+func (m *victoriametricsMeter) Gauge(name string, f func() float64, labels ...string) meter.Gauge {
+	return m.set.GetOrCreateGauge(m.buildName(name, labels...), f)
 }
 
-func (r *victoriametricsMeter) Histogram(name string, labels ...string) meter.Histogram {
-	return r.set.GetOrCreateHistogram(r.buildName(name, labels...))
+func (m *victoriametricsMeter) Histogram(name string, labels ...string) meter.Histogram {
+	if m.prometheusCompat {
+		return m.set.GetOrCreateCompatibleHistogram(m.buildName(name, labels...))
+	}
+	return m.set.GetOrCreateHistogram(m.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) Summary(name string, labels ...string) meter.Summary {
-	return r.set.GetOrCreateSummary(r.buildName(name, labels...))
+func (m *victoriametricsMeter) Summary(name string, labels ...string) meter.Summary {
+	return m.set.GetOrCreateSummary(m.buildName(name, labels...))
 }
 
-func (r *victoriametricsMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
-	return r.set.GetOrCreateSummaryExt(r.buildName(name, labels...), window, quantiles)
+func (m *victoriametricsMeter) SummaryExt(name string, window time.Duration, quantiles []float64, labels ...string) meter.Summary {
+	return m.set.GetOrCreateSummaryExt(m.buildName(name, labels...), window, quantiles)
 }
 
-func (r *victoriametricsMeter) Set(opts ...meter.Option) meter.Meter {
-	m := &victoriametricsMeter{opts: r.opts}
+func (m *victoriametricsMeter) Set(opts ...meter.Option) meter.Meter {
+	nm := &victoriametricsMeter{opts: m.opts}
+	for _, o := range opts {
+		o(&nm.opts)
+	}
+	nm.set = metrics.NewSet()
+	if v, ok := nm.opts.Context.Value(prometheusCompatKey{}).(bool); ok {
+		nm.prometheusCompat = v
+	}
+	return nm
+}
+
+func (m *victoriametricsMeter) Init(opts ...meter.Option) error {
 	for _, o := range opts {
 		o(&m.opts)
 	}
-	m.set = metrics.NewSet()
-	return m
-}
-
-func (r *victoriametricsMeter) Init(opts ...meter.Option) error {
-	for _, o := range opts {
-		o(&r.opts)
+	if v, ok := m.opts.Context.Value(prometheusCompatKey{}).(bool); ok {
+		m.prometheusCompat = v
 	}
-
 	return nil
 }
 
-func (r *victoriametricsMeter) Write(w io.Writer, opts ...meter.Option) error {
-	options := r.opts
+func (m *victoriametricsMeter) Write(w io.Writer, opts ...meter.Option) error {
+	options := m.opts
 	for _, o := range opts {
 		o(&options)
 	}
 
-	r.set.WritePrometheus(w)
+	m.set.WritePrometheus(w)
 	if options.WriteProcessMetrics {
 		metrics.WriteProcessMetrics(w)
 	}
 	if options.WriteFDMetrics {
 		metrics.WriteFDMetrics(w)
 	}
+
 	return nil
 }
 
-func (r *victoriametricsMeter) Options() meter.Options {
-	return r.opts
+func (m *victoriametricsMeter) Options() meter.Options {
+	return m.opts
 }
 
-func (r *victoriametricsMeter) String() string {
+func (m *victoriametricsMeter) String() string {
 	return "victoriametrics"
 }

victoriametrics_test.go

@@ -1,6 +1,7 @@
 package victoriametrics
 
 import (
+	"bytes"
 	"testing"
 )
 
@@ -16,3 +17,13 @@ func TestBuildName(t *testing.T) {
 	cnt := m.Counter("counter", "key", "val")
 	cnt.Inc()
 }
+
+func TestPrometheusCompat(t *testing.T) {
+	m := NewMeter(PrometheusCompat(true))
+	m.Histogram("foo", "key", "val").Update(15)
+
+	buf := bytes.NewBuffer(nil)
+
+	_ = m.Write(buf)
+	t.Logf("\n%s", buf.Bytes())
+}