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Merge pull request #20 from prometheus/update/stringers 

Update LabelSet and Metric String() methods from server.
This commit is contained in:
juliusv 2013-06-12 09:47:59 -07:00
parent 14cbd6b8ce 2c8b7cc19b
commit 024b00bcef
6 changed files with 88 additions and 57 deletions
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14
extraction/processor.go
View File

@ -20,18 +20,6 @@ import (
"github.com/prometheus/client_golang/model"
)
const (
// The label name prefix to prepend if a synthetic label is already present
// in the exported metrics.
ExporterLabelPrefix model.LabelName = "exporter_"
// The label name indicating the metric name of a timeseries.
MetricNameLabel = "name"
// The label name indicating the job from which a timeseries was scraped.
JobLabel = "job"
)
// ProcessOptions dictates how the interpreted stream should be rendered for
// consumption.
type ProcessOptions struct {
@ -82,7 +70,7 @@ func mergeTargetLabels(entityLabels, targetLabels model.LabelSet) model.LabelSet
for label, labelValue := range targetLabels {
if _, exists := result[label]; exists {
result[ExporterLabelPrefix+label] = labelValue
result[model.ExporterLabelPrefix+label] = labelValue
} else {
result[label] = labelValue
}

40
extraction/processor0_0_1_test.go
View File

@ -21,8 +21,8 @@ import (
"testing"
"time"
"github.com/prometheus/client_golang/test"
"github.com/prometheus/client_golang/model"
"github.com/prometheus/client_golang/test"
)
func testProcessor001Process(t test.Tester) {
@ -39,84 +39,84 @@ func testProcessor001Process(t test.Tester) {
{
in: "test0_0_1-0_0_2.json",
baseLabels: model.LabelSet{
JobLabel: "batch_exporter",
model.JobLabel: "batch_exporter",
},
out: model.Samples{
&model.Sample{
Metric: model.Metric{"service": "zed", MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Metric: model.Metric{"service": "zed", model.MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Value: 25,
},
&model.Sample{
Metric: model.Metric{"service": "bar", MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Metric: model.Metric{"service": "bar", model.MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Value: 25,
},
&model.Sample{
Metric: model.Metric{"service": "foo", MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Metric: model.Metric{"service": "foo", model.MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Value: 25,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.010000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.010000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 0.0459814091918713,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.010000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.010000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 78.48563317257356,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.010000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.010000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 15.890724674774395,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.050000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.050000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 0.0459814091918713,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.050000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.050000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 78.48563317257356,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.050000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.050000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 15.890724674774395,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.500000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.500000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 0.6120456642749681,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.500000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.500000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 97.31798360385088,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.500000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.500000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 84.63044031436561,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.900000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.900000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 1.355915069887731,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.900000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.900000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 109.89202084295582,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.900000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.900000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 160.21100853053224,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.990000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.990000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 1.772733213161236,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.990000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.990000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 109.99626121011262,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.990000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.990000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 172.49828748957728,
},
},

40
extraction/processor0_0_2_test.go
View File

@ -22,8 +22,8 @@ import (
"testing"
"time"
"github.com/prometheus/client_golang/test"
"github.com/prometheus/client_golang/model"
"github.com/prometheus/client_golang/test"
)
func testProcessor002Process(t test.Tester) {
@ -40,84 +40,84 @@ func testProcessor002Process(t test.Tester) {
{
in: "test0_0_1-0_0_2.json",
baseLabels: model.LabelSet{
JobLabel: "batch_exporter",
model.JobLabel: "batch_exporter",
},
out: model.Samples{
&model.Sample{
Metric: model.Metric{"service": "zed", MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Metric: model.Metric{"service": "zed", model.MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Value: 25,
},
&model.Sample{
Metric: model.Metric{"service": "bar", MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Metric: model.Metric{"service": "bar", model.MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Value: 25,
},
&model.Sample{
Metric: model.Metric{"service": "foo", MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Metric: model.Metric{"service": "foo", model.MetricNameLabel: "rpc_calls_total", "job": "batch_job", "exporter_job": "batch_exporter"},
Value: 25,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.010000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.010000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 0.0459814091918713,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.010000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.010000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 78.48563317257356,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.010000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.010000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 15.890724674774395,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.050000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.050000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 0.0459814091918713,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.050000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.050000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 78.48563317257356,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.050000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.050000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 15.890724674774395,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.500000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.500000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 0.6120456642749681,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.500000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.500000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 97.31798360385088,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.500000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.500000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 84.63044031436561,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.900000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.900000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 1.355915069887731,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.900000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.900000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 109.89202084295582,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.900000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.900000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 160.21100853053224,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.990000", MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.990000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "zed", "job": "batch_exporter"},
Value: 1.772733213161236,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.990000", MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.990000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "bar", "job": "batch_exporter"},
Value: 109.99626121011262,
},
&model.Sample{
Metric: model.Metric{"percentile": "0.990000", MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Metric: model.Metric{"percentile": "0.990000", model.MetricNameLabel: "rpc_latency_microseconds", "service": "foo", "job": "batch_exporter"},
Value: 172.49828748957728,
},
},

12
model/labelname.go
View File

@ -17,6 +17,18 @@ import (
"strings"
)
const (
// The label name prefix to prepend if a synthetic label is already present
// in the exported metrics.
ExporterLabelPrefix LabelName = "exporter_"
// The label name indicating the metric name of a timeseries.
MetricNameLabel = "name"
// The label name indicating the job from which a timeseries was scraped.
JobLabel = "job"
)
// A LabelName is a key for a LabelSet or Metric. It has a value associated
// therewith.
type LabelName string

12
model/labelset.go
View File

@ -44,10 +44,14 @@ func (l LabelSet) Merge(other LabelSet) LabelSet {
func (l LabelSet) String() string {
labelStrings := make([]string, 0, len(l))
for label, value := range l {
labelStrings = append(labelStrings, fmt.Sprintf("%s='%s'", label, value))
labelStrings = append(labelStrings, fmt.Sprintf("%s=%q", label, value))
}
sort.Strings(labelStrings)
return fmt.Sprintf("{%s}", strings.Join(labelStrings, ", "))
switch len(labelStrings) {
case 0:
return ""
default:
sort.Strings(labelStrings)
return fmt.Sprintf("{%s}", strings.Join(labelStrings, ", "))
}
}

27
model/metric.go
View File

@ -13,6 +13,12 @@
package model
import (
"fmt"
"sort"
"strings"
)
// A Metric is similar to a LabelSet, but the key difference is that a Metric is
// a singleton and refers to one and only one stream of samples.
type Metric map[LabelName]LabelValue
@ -36,3 +42,24 @@ func (m Metric) Before(o Metric) bool {
return m.Before(o)
}
func (m Metric) String() string {
metricName, ok := m[MetricNameLabel]
if !ok {
panic("Tried to print metric without name")
}
labelStrings := make([]string, 0, len(m)-1)
for label, value := range m {
if label != MetricNameLabel {
labelStrings = append(labelStrings, fmt.Sprintf("%s=%q", label, value))
}
}
switch len(labelStrings) {
case 0:
return string(metricName)
default:
sort.Strings(labelStrings)
return fmt.Sprintf("%s{%s}", metricName, strings.Join(labelStrings, ", "))
}
}