Moved to google.golang.org/genproto/googleapis/api/annotations

Fixes #52

vendor/github.com/go-kit/kit/metrics/multi/multi.go

@@ -0,0 +1,86 @@
+// Package multi provides adapters that send observations to multiple metrics
+// simultaneously. This is useful if your service needs to emit to multiple
+// instrumentation systems at the same time, for example if your organization is
+// transitioning from one system to another.
+package multi
+
+import "github.com/go-kit/kit/metrics"
+
+// Counter collects multiple individual counters and treats them as a unit.
+type Counter []metrics.Counter
+
+// NewCounter returns a multi-counter, wrapping the passed counters.
+func NewCounter(c ...metrics.Counter) Counter {
+	return Counter(c)
+}
+
+// Add implements counter.
+func (c Counter) Add(delta float64) {
+	for _, counter := range c {
+		counter.Add(delta)
+	}
+}
+
+// With implements counter.
+func (c Counter) With(labelValues ...string) metrics.Counter {
+	next := make(Counter, len(c))
+	for i := range c {
+		next[i] = c[i].With(labelValues...)
+	}
+	return next
+}
+
+// Gauge collects multiple individual gauges and treats them as a unit.
+type Gauge []metrics.Gauge
+
+// NewGauge returns a multi-gauge, wrapping the passed gauges.
+func NewGauge(g ...metrics.Gauge) Gauge {
+	return Gauge(g)
+}
+
+// Set implements Gauge.
+func (g Gauge) Set(value float64) {
+	for _, gauge := range g {
+		gauge.Set(value)
+	}
+}
+
+// With implements gauge.
+func (g Gauge) With(labelValues ...string) metrics.Gauge {
+	next := make(Gauge, len(g))
+	for i := range g {
+		next[i] = g[i].With(labelValues...)
+	}
+	return next
+}
+
+// Add implements metrics.Gauge.
+func (g Gauge) Add(delta float64) {
+	for _, gauge := range g {
+		gauge.Add(delta)
+	}
+}
+
+// Histogram collects multiple individual histograms and treats them as a unit.
+type Histogram []metrics.Histogram
+
+// NewHistogram returns a multi-histogram, wrapping the passed histograms.
+func NewHistogram(h ...metrics.Histogram) Histogram {
+	return Histogram(h)
+}
+
+// Observe implements Histogram.
+func (h Histogram) Observe(value float64) {
+	for _, histogram := range h {
+		histogram.Observe(value)
+	}
+}
+
+// With implements histogram.
+func (h Histogram) With(labelValues ...string) metrics.Histogram {
+	next := make(Histogram, len(h))
+	for i := range h {
+		next[i] = h[i].With(labelValues...)
+	}
+	return next
+}

vendor/github.com/go-kit/kit/metrics/multi/multi_test.go

@@ -0,0 +1,96 @@
+package multi
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/go-kit/kit/metrics"
+)
+
+func TestMultiCounter(t *testing.T) {
+	c1 := &mockCounter{}
+	c2 := &mockCounter{}
+	c3 := &mockCounter{}
+	mc := NewCounter(c1, c2, c3)
+
+	mc.Add(123)
+	mc.Add(456)
+
+	want := "[123 456]"
+	for i, m := range []fmt.Stringer{c1, c2, c3} {
+		if have := m.String(); want != have {
+			t.Errorf("c%d: want %q, have %q", i+1, want, have)
+		}
+	}
+}
+
+func TestMultiGauge(t *testing.T) {
+	g1 := &mockGauge{}
+	g2 := &mockGauge{}
+	g3 := &mockGauge{}
+	mg := NewGauge(g1, g2, g3)
+
+	mg.Set(9)
+	mg.Set(8)
+	mg.Set(7)
+	mg.Add(3)
+
+	want := "[9 8 7 10]"
+	for i, m := range []fmt.Stringer{g1, g2, g3} {
+		if have := m.String(); want != have {
+			t.Errorf("g%d: want %q, have %q", i+1, want, have)
+		}
+	}
+}
+
+func TestMultiHistogram(t *testing.T) {
+	h1 := &mockHistogram{}
+	h2 := &mockHistogram{}
+	h3 := &mockHistogram{}
+	mh := NewHistogram(h1, h2, h3)
+
+	mh.Observe(1)
+	mh.Observe(2)
+	mh.Observe(4)
+	mh.Observe(8)
+
+	want := "[1 2 4 8]"
+	for i, m := range []fmt.Stringer{h1, h2, h3} {
+		if have := m.String(); want != have {
+			t.Errorf("g%d: want %q, have %q", i+1, want, have)
+		}
+	}
+}
+
+type mockCounter struct {
+	obs []float64
+}
+
+func (c *mockCounter) Add(delta float64)              { c.obs = append(c.obs, delta) }
+func (c *mockCounter) With(...string) metrics.Counter { return c }
+func (c *mockCounter) String() string                 { return fmt.Sprintf("%v", c.obs) }
+
+type mockGauge struct {
+	obs []float64
+}
+
+func (g *mockGauge) Set(value float64)            { g.obs = append(g.obs, value) }
+func (g *mockGauge) With(...string) metrics.Gauge { return g }
+func (g *mockGauge) String() string               { return fmt.Sprintf("%v", g.obs) }
+func (g *mockGauge) Add(delta float64) {
+	var value float64
+	if len(g.obs) > 0 {
+		value = g.obs[len(g.obs)-1] + delta
+	} else {
+		value = delta
+	}
+	g.obs = append(g.obs, value)
+}
+
+type mockHistogram struct {
+	obs []float64
+}
+
+func (h *mockHistogram) Observe(value float64)            { h.obs = append(h.obs, value) }
+func (h *mockHistogram) With(...string) metrics.Histogram { return h }
+func (h *mockHistogram) String() string                   { return fmt.Sprintf("%v", h.obs) }