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Merged
tiedotguy merged 3 commits into from
Jul 28, 2025
Merged

Add support for DogStatsD v1.1 - value packing #762

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a51297b
Add support for DogStatsD v1.1 - value packing
Jul 3, 2025
2f855c8
Add more tests.
Jul 4, 2025
e65f218
Change wording in comment, handle empty StringValue
Jul 9, 2025
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4 changes: 4 additions & 0 deletions CHANGELOG.md
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Original file line number Diff line number Diff line change
@@ -1,3 +1,7 @@
41.0.0
------
- Add support for [DogStatsD protocol v1.1](https://docs.datadoghq.com/developers/dogstatsd/datagram_shell/?tab=metrics#dogstatsd-protocol-v11) - value packing.

40.1.0
------
- Add support for configuration of receiver's buffer size - `receive-buffer-size`
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11 changes: 11 additions & 0 deletions README.md
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Expand Up @@ -390,6 +390,17 @@ A simple way to test your installation or send metrics from a script is to use

echo 'abc.def.g:10|c' | nc -w1 -u localhost 8125

Since 41.0.0, server supports value packing from [DogStatsD protocol v1.1](https://docs.datadoghq.com/developers/dogstatsd/datagram_shell/?tab=metrics#dogstatsd-protocol-v11)
It means it's possible to send multiple values within single line, for example when you do pre-consolidation on client side.
It support all metric types except `SET`

The format of value-packing is:

<bucket name>:<value1>:<value2>,<value3>|<type>\n

You can send as much values as you would like, however remember to not exceed single packet size limits (usually size of MTU)
as it will cause packets fragmentation and can lead to worse performance or lost packets.

Monitoring
----------
Many metrics for the internal processes are emitted. See METRICS.md for details. Go expvar is also
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2 changes: 1 addition & 1 deletion internal/fixtures/metrics.go
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Expand Up @@ -70,7 +70,7 @@ func SortCompare(ms []*gostatsd.Metric) func(i, j int) bool {
if ms[i].Type == gostatsd.SET {
return ms[i].StringValue < ms[j].StringValue
} else {
return ms[i].Value < ms[j].Value
return ms[i].Values[0] < ms[j].Values[0]
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@tiedotguy tiedotguy Jul 3, 2025

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Note for other reviewers: this code path is used in tests, to provide stable sorting, and making it easier to compare lists. It doesn't need to be perfect in production, just good enough in tests.

}
}
return len(ms[i].Tags) < len(ms[j].Tags)
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29 changes: 23 additions & 6 deletions internal/lexer/lexer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@ import (
"errors"
"math"
"strconv"
"strings"

"github.com/atlassian/gostatsd"
"github.com/atlassian/gostatsd/internal/pool"
Expand Down Expand Up @@ -101,14 +102,30 @@ func (l *Lexer) Run(input []byte, namespace string) (*gostatsd.Metric, *gostatsd
if l.m != nil {
l.m.Rate = l.sampling
if l.m.Type != gostatsd.SET {
v, err := strconv.ParseFloat(l.m.StringValue, 64)
if err != nil {
return nil, nil, err
// Count number of colons to preallocate array
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@hstan hstan Jul 7, 2025

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is it count number of colons? why it starts from 1?
based on the code below I guess it's actually the count of values split by colons?

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@tiedotguy tiedotguy Jul 8, 2025 •
edited
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We start at count = 1. There's always 1 more value than there is colons.

edit: unless there's empty values, but this is pre-alocation, so we're just trying to avoid re-allocations. We can go a bit over.

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@Wheezyx Wheezyx Jul 9, 2025

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I've changed the comment and logic a bit to make it clearer.

count := 1
for i := 0; i < len(l.m.StringValue); i++ {
if l.m.StringValue[i] == ':' {
count++
}
}
if math.IsNaN(v) {
return nil, nil, errNaN
values := make([]float64, 0, count)

for _, stringValue := range strings.Split(l.m.StringValue, ":") {
if stringValue == "" {
// SKip the value, it could be something like a.packing:1:2:|ms|#|:|c:xyz
continue
}
v, err := strconv.ParseFloat(stringValue, 64)
if err != nil {
return nil, nil, err
}
if math.IsNaN(v) {
return nil, nil, errNaN
}
values = append(values, v)
}
l.m.Value = v
l.m.Values = values
l.m.StringValue = ""
}
l.m.Tags = l.tags
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103 changes: 57 additions & 46 deletions internal/lexer/lexer_test.go
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Original file line number Diff line number Diff line change
Expand Up @@ -14,54 +14,65 @@ import (
func TestMetricsLexer(t *testing.T) {
t.Parallel()
tests := map[string]gostatsd.Metric{
"foo.bar.baz:2|c": {Name: "foo.bar.baz", Value: 2, Type: gostatsd.COUNTER, Rate: 1.0},
"abc.def.g:3|g": {Name: "abc.def.g", Value: 3, Type: gostatsd.GAUGE, Rate: 1.0},
"def.g:10|ms": {Name: "def.g", Value: 10, Type: gostatsd.TIMER, Rate: 1.0},
"def.h:10|h": {Name: "def.h", Value: 10, Type: gostatsd.TIMER, Rate: 1.0},
"def.i:10|h|#foo": {Name: "def.i", Value: 10, Type: gostatsd.TIMER, Rate: 1.0, Tags: gostatsd.Tags{"foo"}},
"smp.rte:5|c|@0.1": {Name: "smp.rte", Value: 5, Type: gostatsd.COUNTER, Rate: 0.1},
"smp.rte:5|c|@0.1|#foo:bar,baz": {Name: "smp.rte", Value: 5, Type: gostatsd.COUNTER, Rate: 0.1, Tags: gostatsd.Tags{"foo:bar", "baz"}},
"smp.rte:5|c|#foo:bar,baz": {Name: "smp.rte", Value: 5, Type: gostatsd.COUNTER, Rate: 1.0, Tags: gostatsd.Tags{"foo:bar", "baz"}},
"foo.bar.baz:2|c": {Name: "foo.bar.baz", Values: []float64{2}, Type: gostatsd.COUNTER, Rate: 1.0},
"abc.def.g:3|g": {Name: "abc.def.g", Values: []float64{3}, Type: gostatsd.GAUGE, Rate: 1.0},
"def.g:10|ms": {Name: "def.g", Values: []float64{10}, Type: gostatsd.TIMER, Rate: 1.0},
"def.h:10|h": {Name: "def.h", Values: []float64{10}, Type: gostatsd.TIMER, Rate: 1.0},
"def.i:10|h|#foo": {Name: "def.i", Values: []float64{10}, Type: gostatsd.TIMER, Rate: 1.0, Tags: gostatsd.Tags{"foo"}},
"smp.rte:5|c|@0.1": {Name: "smp.rte", Values: []float64{5}, Type: gostatsd.COUNTER, Rate: 0.1},
"smp.rte:5|c|@0.1|#foo:bar,baz": {Name: "smp.rte", Values: []float64{5}, Type: gostatsd.COUNTER, Rate: 0.1, Tags: gostatsd.Tags{"foo:bar", "baz"}},
"smp.rte:5|c|#foo:bar,baz": {Name: "smp.rte", Values: []float64{5}, Type: gostatsd.COUNTER, Rate: 1.0, Tags: gostatsd.Tags{"foo:bar", "baz"}},
"uniq.usr:joe|s": {Name: "uniq.usr", StringValue: "joe", Type: gostatsd.SET, Rate: 1.0},
"fooBarBaz:2|c": {Name: "fooBarBaz", Value: 2, Type: gostatsd.COUNTER, Rate: 1.0},
"smp.rte:5|c|#Foo:Bar,baz": {Name: "smp.rte", Value: 5, Type: gostatsd.COUNTER, Rate: 1.0, Tags: gostatsd.Tags{"Foo:Bar", "baz"}},
"smp.gge:1|g|#Foo:Bar": {Name: "smp.gge", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"Foo:Bar"}},
"smp.gge:1|g|#fo_o:ba-r": {Name: "smp.gge", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"fo_o:ba-r"}},
"smp gge:1|g": {Name: "smp_gge", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"smp/gge:1|g": {Name: "smp-gge", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"smp,gge$:1|g": {Name: "smpgge", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"fooBarBaz:2|c": {Name: "fooBarBaz", Values: []float64{2}, Type: gostatsd.COUNTER, Rate: 1.0},
"smp.rte:5|c|#Foo:Bar,baz": {Name: "smp.rte", Values: []float64{5}, Type: gostatsd.COUNTER, Rate: 1.0, Tags: gostatsd.Tags{"Foo:Bar", "baz"}},
"smp.gge:1|g|#Foo:Bar": {Name: "smp.gge", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"Foo:Bar"}},
"smp.gge:1|g|#fo_o:ba-r": {Name: "smp.gge", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"fo_o:ba-r"}},
"smp gge:1|g": {Name: "smp_gge", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"smp/gge:1|g": {Name: "smp-gge", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"smp,gge$:1|g": {Name: "smpgge", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"un1qu3:john|s": {Name: "un1qu3", StringValue: "john", Type: gostatsd.SET, Rate: 1.0},
"un1qu3:john|s|#some:42": {Name: "un1qu3", StringValue: "john", Type: gostatsd.SET, Rate: 1.0, Tags: gostatsd.Tags{"some:42"}},
"da-sh:1|s": {Name: "da-sh", StringValue: "1", Type: gostatsd.SET, Rate: 1.0},
"under_score:1|s": {Name: "under_score", StringValue: "1", Type: gostatsd.SET, Rate: 1.0},
"a:1|g|#f,,": {Name: "a", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"a:1|g|#,,f": {Name: "a", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"a:1|g|#f,,z": {Name: "a", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f", "z"}},
"a:1|g|#": {Name: "a", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"a:1|g|#,": {Name: "a", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"a:1|g|#,,": {Name: "a", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"foo.bar.baz:2|c|c:xyz": {Name: "foo.bar.baz", Value: 2, Type: gostatsd.COUNTER, Rate: 1.0},
"smp.rte:5|c|@0.1|c:xyz": {Name: "smp.rte", Value: 5, Type: gostatsd.COUNTER, Rate: 0.1},
"smp.rte:5|c|@0.1|#foo:bar,baz|c:xyz": {Name: "smp.rte", Value: 5, Type: gostatsd.COUNTER, Rate: 0.1, Tags: gostatsd.Tags{"foo:bar", "baz"}},
"def.i:10|h|#foo|c:xyz": {Name: "def.i", Value: 10, Type: gostatsd.TIMER, Rate: 1.0, Tags: gostatsd.Tags{"foo"}},
"c.after.tags:1|g|#f,,|c:xyz": {Name: "c.after.tags", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"c.after.tags:1|g|#,,f|c:xyz": {Name: "c.after.tags", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"c.after.tags:1|g|#f,,z|c:xyz": {Name: "c.after.tags", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f", "z"}},
"c.after.tags:1|g|#|c:xyz": {Name: "c.after.tags", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"c.after.tags:1|g|#,|c:xyz": {Name: "c.after.tags", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"c.after.tags:1|g|#,,|c:xyz": {Name: "c.after.tags", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"c.after.tags:1|g|#,,|c::,#@": {Name: "c.after.tags", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"field.order.rev.all:1|g|c:xyz|#foo:bar|@0.1": {Name: "field.order.rev.all", Value: 1, Type: gostatsd.GAUGE, Rate: 0.1, Tags: gostatsd.Tags{"foo:bar"}},
"field.order.rev.notags:1|g|c:xyz|@0.1": {Name: "field.order.rev.notags", Value: 1, Type: gostatsd.GAUGE, Rate: 0.1},
"new.last.prefix:1|g|#,,|c:xyz|x:": {Name: "new.last.prefix", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.last.empty:1|g|#,|c:xyz|": {Name: "new.last.empty", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.last.colon:1|g|#|c:xyz|:": {Name: "new.last.colon", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.first.prefix:1|g|x:#,,|c:xyz|": {Name: "new.first.prefix", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.first.empty:1|g||#,|c:xyz": {Name: "new.first.empty", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.first.colon:1|g|:|#|c:xyz": {Name: "new.first.colon", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.mid.prefix:1|g|#,,|x:|c:xyz": {Name: "new.mid.prefix", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.mid.empty:1|g|#,||c:xyz": {Name: "new.mid.empty", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"new.mid.colon:1|g|#|:|c:xyz": {Name: "new.mid.colon", Value: 1, Type: gostatsd.GAUGE, Rate: 1.0},
"a:1|g|#f,,": {Name: "a", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"a:1|g|#,,f": {Name: "a", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"a:1|g|#f,,z": {Name: "a", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f", "z"}},
"a:1|g|#": {Name: "a", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"a:1|g|#,": {Name: "a", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"a:1|g|#,,": {Name: "a", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"foo.bar.baz:2|c|c:xyz": {Name: "foo.bar.baz", Values: []float64{2}, Type: gostatsd.COUNTER, Rate: 1.0},
"smp.rte:5|c|@0.1|c:xyz": {Name: "smp.rte", Values: []float64{5}, Type: gostatsd.COUNTER, Rate: 0.1},
"smp.rte:5|c|@0.1|#foo:bar,baz|c:xyz": {Name: "smp.rte", Values: []float64{5}, Type: gostatsd.COUNTER, Rate: 0.1, Tags: gostatsd.Tags{"foo:bar", "baz"}},
"def.i:10|h|#foo|c:xyz": {Name: "def.i", Values: []float64{10}, Type: gostatsd.TIMER, Rate: 1.0, Tags: gostatsd.Tags{"foo"}},
"c.after.tags:1|g|#f,,|c:xyz": {Name: "c.after.tags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"c.after.tags:1|g|#,,f|c:xyz": {Name: "c.after.tags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f"}},
"c.after.tags:1|g|#f,,z|c:xyz": {Name: "c.after.tags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0, Tags: gostatsd.Tags{"f", "z"}},
"c.after.tags:1|g|#|c:xyz": {Name: "c.after.tags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"c.after.tags:1|g|#,|c:xyz": {Name: "c.after.tags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"c.after.tags:1|g|#,,|c:xyz": {Name: "c.after.tags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"c.after.tags:1|g|#,,|c::,#@": {Name: "c.after.tags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"field.order.rev.all:1|g|c:xyz|#foo:bar|@0.1": {Name: "field.order.rev.all", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 0.1, Tags: gostatsd.Tags{"foo:bar"}},
"field.order.rev.notags:1|g|c:xyz|@0.1": {Name: "field.order.rev.notags", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 0.1},
"new.last.prefix:1|g|#,,|c:xyz|x:": {Name: "new.last.prefix", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.last.empty:1|g|#,|c:xyz|": {Name: "new.last.empty", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.last.colon:1|g|#|c:xyz|:": {Name: "new.last.colon", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.first.prefix:1|g|x:#,,|c:xyz|": {Name: "new.first.prefix", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.first.empty:1|g||#,|c:xyz": {Name: "new.first.empty", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.first.colon:1|g|:|#|c:xyz": {Name: "new.first.colon", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.mid.prefix:1|g|#,,|x:|c:xyz": {Name: "new.mid.prefix", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.mid.empty:1|g|#,||c:xyz": {Name: "new.mid.empty", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
"new.mid.colon:1|g|#|:|c:xyz": {Name: "new.mid.colon", Values: []float64{1}, Type: gostatsd.GAUGE, Rate: 1.0},
// Value packing tests
"a.packing:1:2|ms|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2}, Type: gostatsd.TIMER, Rate: 1.0},
"a.packing:1:2:3|ms|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2, 3}, Type: gostatsd.TIMER, Rate: 1.0},
"a.packing:1:2:|ms|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2}, Type: gostatsd.TIMER, Rate: 1.0},
"a.packing:|ms|#|:|c:xyz": {Name: "a.packing", Values: []float64{}, Type: gostatsd.TIMER, Rate: 1.0},
"a.packing:1:2|c|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2}, Type: gostatsd.COUNTER, Rate: 1.0},
"a.packing:1:2:3|c|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2, 3}, Type: gostatsd.COUNTER, Rate: 1.0},
"a.packing:1:2:|c|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2}, Type: gostatsd.COUNTER, Rate: 1.0},
"a.packing:1:2|g|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2}, Type: gostatsd.GAUGE, Rate: 1.0},
"a.packing:1:2:3|g|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2, 3}, Type: gostatsd.GAUGE, Rate: 1.0},
"a.packing:1:2:|g|#|:|c:xyz": {Name: "a.packing", Values: []float64{1, 2}, Type: gostatsd.GAUGE, Rate: 1.0},
}

compareMetric(t, tests, "")
Expand All @@ -85,9 +96,9 @@ func TestInvalidMetricsLexer(t *testing.T) {
}

tests := map[string]gostatsd.Metric{
"foo.bar.baz:2|c": {Name: "stats.foo.bar.baz", Value: 2, Type: gostatsd.COUNTER, Rate: 1.0},
"abc.def.g:3|g": {Name: "stats.abc.def.g", Value: 3, Type: gostatsd.GAUGE, Rate: 1.0},
"def.g:10|ms": {Name: "stats.def.g", Value: 10, Type: gostatsd.TIMER, Rate: 1.0},
"foo.bar.baz:2|c": {Name: "stats.foo.bar.baz", Values: []float64{2}, Type: gostatsd.COUNTER, Rate: 1.0},
"abc.def.g:3|g": {Name: "stats.abc.def.g", Values: []float64{3}, Type: gostatsd.GAUGE, Rate: 1.0},
"def.g:10|ms": {Name: "stats.def.g", Values: []float64{10}, Type: gostatsd.TIMER, Rate: 1.0},
"uniq.usr:joe|s": {Name: "stats.uniq.usr", StringValue: "joe", Type: gostatsd.SET, Rate: 1.0},
}

Expand Down
6 changes: 3 additions & 3 deletions metric_consolidator_test.go
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -21,14 +21,14 @@ func TestConsolidation(t *testing.T) {
m1 := &Metric{
Name: "foo",
Type: COUNTER,
Value: 1,
Values: []float64{1},
Rate: 1,
Timestamp: 10,
}
m2 := &Metric{
Name: "foo",
Type: COUNTER,
Value: 3,
Values: []float64{3},
Rate: 0.1,
Timestamp: 20,
}
Expand Down Expand Up @@ -76,7 +76,7 @@ func randomMetric(seed, variations int) *Metric {
if m.Type == SET {
m.StringValue = fmt.Sprintf("%d", seed)
} else {
m.Value = float64(seed)
m.Values = []float64{float64(seed)}
m.Rate = 1
}
m.Timestamp = 10
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