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Vendor common/expfmt package

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This commit is contained in:
Fabian Reinartz 2015-08-20 17:51:40 +02:00
parent 306e8468a0
commit f237b0e2da
14 changed files with 4225 additions and 0 deletions
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4
Godeps/Godeps.json generated
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@ -58,6 +58,10 @@
"ImportPath": "github.com/prometheus/client_golang/text",
"Rev": "3a499bf7fc46bc58337ce612d0cbb29c550b8118"
},
{
"ImportPath": "github.com/prometheus/common/expfmt",
"Rev": "2502df85be1b9482ed669faa6b7cfe7f850eb08e"
},
{
"ImportPath": "github.com/prometheus/common/model",
"Rev": "2502df85be1b9482ed669faa6b7cfe7f850eb08e"

171
Godeps/_workspace/src/github.com/prometheus/common/expfmt/bench_test.go generated vendored Normal file
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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"bytes"
"compress/gzip"
"io"
"io/ioutil"
"testing"
"github.com/matttproud/golang_protobuf_extensions/pbutil"
dto "github.com/prometheus/client_model/go"
)
var parser TextParser
// Benchmarks to show how much penalty text format parsing actually inflicts.
//
// Example results on Linux 3.13.0, Intel(R) Core(TM) i7-4700MQ CPU @ 2.40GHz, go1.4.
//
// BenchmarkParseText 1000 1188535 ns/op 205085 B/op 6135 allocs/op
// BenchmarkParseTextGzip 1000 1376567 ns/op 246224 B/op 6151 allocs/op
// BenchmarkParseProto 10000 172790 ns/op 52258 B/op 1160 allocs/op
// BenchmarkParseProtoGzip 5000 324021 ns/op 94931 B/op 1211 allocs/op
// BenchmarkParseProtoMap 10000 187946 ns/op 58714 B/op 1203 allocs/op
//
// CONCLUSION: The overhead for the map is negligible. Text format needs ~5x more allocations.
// Without compression, it needs ~7x longer, but with compression (the more relevant scenario),
// the difference becomes less relevant, only ~4x.
//
// The test data contains 248 samples.
//
// BenchmarkProcessor002ParseOnly in the extraction package is not quite
// comparable to the benchmarks here, but it gives an idea: JSON parsing is even
// slower than text parsing and needs a comparable amount of allocs.
// BenchmarkParseText benchmarks the parsing of a text-format scrape into metric
// family DTOs.
func BenchmarkParseText(b *testing.B) {
b.StopTimer()
data, err := ioutil.ReadFile("testdata/text")
if err != nil {
b.Fatal(err)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
if _, err := parser.TextToMetricFamilies(bytes.NewReader(data)); err != nil {
b.Fatal(err)
}
}
}
// BenchmarkParseTextGzip benchmarks the parsing of a gzipped text-format scrape
// into metric family DTOs.
func BenchmarkParseTextGzip(b *testing.B) {
b.StopTimer()
data, err := ioutil.ReadFile("testdata/text.gz")
if err != nil {
b.Fatal(err)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
in, err := gzip.NewReader(bytes.NewReader(data))
if err != nil {
b.Fatal(err)
}
if _, err := parser.TextToMetricFamilies(in); err != nil {
b.Fatal(err)
}
}
}
// BenchmarkParseProto benchmarks the parsing of a protobuf-format scrape into
// metric family DTOs. Note that this does not build a map of metric families
// (as the text version does), because it is not required for Prometheus
// ingestion either. (However, it is required for the text-format parsing, as
// the metric family might be sprinkled all over the text, while the
// protobuf-format guarantees bundling at one place.)
func BenchmarkParseProto(b *testing.B) {
b.StopTimer()
data, err := ioutil.ReadFile("testdata/protobuf")
if err != nil {
b.Fatal(err)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
family := &dto.MetricFamily{}
in := bytes.NewReader(data)
for {
family.Reset()
if _, err := pbutil.ReadDelimited(in, family); err != nil {
if err == io.EOF {
break
}
b.Fatal(err)
}
}
}
}
// BenchmarkParseProtoGzip is like BenchmarkParseProto above, but parses gzipped
// protobuf format.
func BenchmarkParseProtoGzip(b *testing.B) {
b.StopTimer()
data, err := ioutil.ReadFile("testdata/protobuf.gz")
if err != nil {
b.Fatal(err)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
family := &dto.MetricFamily{}
in, err := gzip.NewReader(bytes.NewReader(data))
if err != nil {
b.Fatal(err)
}
for {
family.Reset()
if _, err := pbutil.ReadDelimited(in, family); err != nil {
if err == io.EOF {
break
}
b.Fatal(err)
}
}
}
}
// BenchmarkParseProtoMap is like BenchmarkParseProto but DOES put the parsed
// metric family DTOs into a map. This is not happening during Prometheus
// ingestion. It is just here to measure the overhead of that map creation and
// separate it from the overhead of the text format parsing.
func BenchmarkParseProtoMap(b *testing.B) {
b.StopTimer()
data, err := ioutil.ReadFile("testdata/protobuf")
if err != nil {
b.Fatal(err)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
families := map[string]*dto.MetricFamily{}
in := bytes.NewReader(data)
for {
family := &dto.MetricFamily{}
if _, err := pbutil.ReadDelimited(in, family); err != nil {
if err == io.EOF {
break
}
b.Fatal(err)
}
families[family.GetName()] = family
}
}
}

388
Godeps/_workspace/src/github.com/prometheus/common/expfmt/decode.go generated vendored Normal file
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@ -0,0 +1,388 @@
// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"fmt"
"io"
"math"
"mime"
"net/http"
dto "github.com/prometheus/client_model/go"
"github.com/matttproud/golang_protobuf_extensions/pbutil"
"github.com/prometheus/common/model"
)
// Decoder types decode an input stream into metric families.
type Decoder interface {
Decode(*dto.MetricFamily) error
}
type DecodeOptions struct {
// Timestamp is added to each value from the stream that has no explicit timestamp set.
Timestamp model.Time
}
// NewDecor returns a new decoder based on the HTTP header.
func NewDecoder(r io.Reader, h http.Header) (Decoder, error) {
ct := h.Get(hdrContentType)
mediatype, params, err := mime.ParseMediaType(ct)
if err != nil {
return nil, fmt.Errorf("invalid Content-Type header %q: %s", ct, err)
}
const (
protoType = ProtoType + "/" + ProtoSubType
textType = "text/plain"
)
switch mediatype {
case protoType:
if p := params["proto"]; p != ProtoProtocol {
return nil, fmt.Errorf("unrecognized protocol message %s", p)
}
if e := params["encoding"]; e != "delimited" {
return nil, fmt.Errorf("unsupported encoding %s", e)
}
return &protoDecoder{r: r}, nil
case textType:
if v, ok := params["version"]; ok && v != "0.0.4" {
return nil, fmt.Errorf("unrecognized protocol version %s", v)
}
return &textDecoder{r: r}, nil
default:
return nil, fmt.Errorf("unsupported media type %q, expected %q or %q", mediatype, protoType, textType)
}
}
// protoDecoder implements the Decoder interface for protocol buffers.
type protoDecoder struct {
r io.Reader
}
// Decode implements the Decoder interface.
func (d *protoDecoder) Decode(v *dto.MetricFamily) error {
_, err := pbutil.ReadDelimited(d.r, v)
return err
}
// textDecoder implements the Decoder interface for the text protcol.
type textDecoder struct {
r io.Reader
p TextParser
fams []*dto.MetricFamily
}
// Decode implements the Decoder interface.
func (d *textDecoder) Decode(v *dto.MetricFamily) error {
// TODO(fabxc): Wrap this as a line reader to make streaming safer.
if len(d.fams) == 0 {
// No cached metric families, read everything and parse metrics.
fams, err := d.p.TextToMetricFamilies(d.r)
if err != nil {
return err
}
if len(fams) == 0 {
return io.EOF
}
for _, f := range fams {
d.fams = append(d.fams, f)
}
}
*v = *d.fams[len(d.fams)-1]
d.fams = d.fams[:len(d.fams)-1]
return nil
}
type SampleDecoder struct {
Dec Decoder
Opts *DecodeOptions
f dto.MetricFamily
}
func (sd *SampleDecoder) Decode(s *model.Vector) error {
if err := sd.Dec.Decode(&sd.f); err != nil {
return err
}
*s = extractSamples(&sd.f, sd.Opts)
return nil
}
// Extract samples builds a slice of samples from the provided metric families.
func ExtractSamples(o *DecodeOptions, fams ...*dto.MetricFamily) model.Vector {
var all model.Vector
for _, f := range fams {
all = append(all, extractSamples(f, o)...)
}
return all
}
func extractSamples(f *dto.MetricFamily, o *DecodeOptions) model.Vector {
switch *f.Type {
case dto.MetricType_COUNTER:
return extractCounter(o, f)
case dto.MetricType_GAUGE:
return extractGauge(o, f)
case dto.MetricType_SUMMARY:
return extractSummary(o, f)
case dto.MetricType_UNTYPED:
return extractUntyped(o, f)
case dto.MetricType_HISTOGRAM:
return extractHistogram(o, f)
}
panic("expfmt.extractSamples: unknown metric family type")
}
func extractCounter(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
samples := make(model.Vector, 0, len(f.Metric))
for _, m := range f.Metric {
if m.Counter == nil {
continue
}
lset := make(model.LabelSet, len(m.Label)+1)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
smpl := &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(m.Counter.GetValue()),
}
if m.TimestampMs != nil {
smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
} else {
smpl.Timestamp = o.Timestamp
}
samples = append(samples, smpl)
}
return samples
}
func extractGauge(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
samples := make(model.Vector, 0, len(f.Metric))
for _, m := range f.Metric {
if m.Gauge == nil {
continue
}
lset := make(model.LabelSet, len(m.Label)+1)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
smpl := &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(m.Gauge.GetValue()),
}
if m.TimestampMs != nil {
smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
} else {
smpl.Timestamp = o.Timestamp
}
samples = append(samples, smpl)
}
return samples
}
func extractUntyped(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
samples := make(model.Vector, 0, len(f.Metric))
for _, m := range f.Metric {
if m.Untyped == nil {
continue
}
lset := make(model.LabelSet, len(m.Label)+1)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
smpl := &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(m.Untyped.GetValue()),
}
if m.TimestampMs != nil {
smpl.Timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
} else {
smpl.Timestamp = o.Timestamp
}
samples = append(samples, smpl)
}
return samples
}
func extractSummary(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
samples := make(model.Vector, 0, len(f.Metric))
for _, m := range f.Metric {
if m.Summary == nil {
continue
}
timestamp := o.Timestamp
if m.TimestampMs != nil {
timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
}
for _, q := range m.Summary.Quantile {
lset := make(model.LabelSet, len(m.Label)+2)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
// BUG(matt): Update other names to "quantile".
lset[model.LabelName(model.QuantileLabel)] = model.LabelValue(fmt.Sprint(q.GetQuantile()))
lset[model.MetricNameLabel] = model.LabelValue(f.GetName())
samples = append(samples, &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(q.GetValue()),
Timestamp: timestamp,
})
}
if m.Summary.SampleSum != nil {
lset := make(model.LabelSet, len(m.Label)+1)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum")
samples = append(samples, &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(m.Summary.GetSampleSum()),
Timestamp: timestamp,
})
}
if m.Summary.SampleCount != nil {
lset := make(model.LabelSet, len(m.Label)+1)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count")
samples = append(samples, &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(m.Summary.GetSampleCount()),
Timestamp: timestamp,
})
}
}
return samples
}
func extractHistogram(o *DecodeOptions, f *dto.MetricFamily) model.Vector {
samples := make(model.Vector, 0, len(f.Metric))
for _, m := range f.Metric {
if m.Histogram == nil {
continue
}
timestamp := o.Timestamp
if m.TimestampMs != nil {
timestamp = model.TimeFromUnixNano(*m.TimestampMs * 1000000)
}
infSeen := false
for _, q := range m.Histogram.Bucket {
lset := make(model.LabelSet, len(m.Label)+2)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.LabelName(model.BucketLabel)] = model.LabelValue(fmt.Sprint(q.GetUpperBound()))
lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
if math.IsInf(q.GetUpperBound(), +1) {
infSeen = true
}
samples = append(samples, &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(q.GetCumulativeCount()),
Timestamp: timestamp,
})
}
if m.Histogram.SampleSum != nil {
lset := make(model.LabelSet, len(m.Label)+1)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_sum")
samples = append(samples, &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(m.Histogram.GetSampleSum()),
Timestamp: timestamp,
})
}
if m.Histogram.SampleCount != nil {
lset := make(model.LabelSet, len(m.Label)+1)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_count")
count := &model.Sample{
Metric: model.Metric(lset),
Value: model.SampleValue(m.Histogram.GetSampleCount()),
Timestamp: timestamp,
}
samples = append(samples, count)
if !infSeen {
// Append a infinity bucket sample.
lset := make(model.LabelSet, len(m.Label)+2)
for _, p := range m.Label {
lset[model.LabelName(p.GetName())] = model.LabelValue(p.GetValue())
}
lset[model.LabelName(model.BucketLabel)] = model.LabelValue("+Inf")
lset[model.MetricNameLabel] = model.LabelValue(f.GetName() + "_bucket")
samples = append(samples, &model.Sample{
Metric: model.Metric(lset),
Value: count.Value,
Timestamp: timestamp,
})
}
}
}
return samples
}

327
Godeps/_workspace/src/github.com/prometheus/common/expfmt/decode_test.go generated vendored Normal file
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// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"errors"
"io"
"net/http"
"reflect"
"sort"
"strings"
"testing"
"github.com/prometheus/common/model"
)
func TestTextDecoder(t *testing.T) {
var (
ts = model.Now()
in = `
# Only a quite simple scenario with two metric families.
# More complicated tests of the parser itself can be found in the text package.
# TYPE mf2 counter
mf2 3
mf1{label="value1"} -3.14 123456
mf1{label="value2"} 42
mf2 4
`
out = model.Vector{
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "mf1",
"label": "value1",
},
Value: -3.14,
Timestamp: 123456,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "mf1",
"label": "value2",
},
Value: 42,
Timestamp: ts,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "mf2",
},
Value: 3,
Timestamp: ts,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "mf2",
},
Value: 4,
Timestamp: ts,
},
}
)
dec := &SampleDecoder{
Dec: &textDecoder{r: strings.NewReader(in)},
Opts: &DecodeOptions{
Timestamp: ts,
},
}
var all model.Vector
for {
var smpls model.Vector
err := dec.Decode(&smpls)
if err == io.EOF {
break
}
if err != nil {
t.Fatal(err)
}
all = append(all, smpls...)
}
sort.Sort(all)
sort.Sort(out)
if !reflect.DeepEqual(all, out) {
t.Fatalf("output does not match")
}
}
func TestProtoDecoder(t *testing.T) {
var testTime = model.Now()
scenarios := []struct {
in string
expected model.Vector
}{
{
in: "",
},
{
in: "\x8f\x01\n\rrequest_count\x12\x12Number of requests\x18\x00\"0\n#\n\x0fsome_label_name\x12\x10some_label_value\x1a\t\t\x00\x00\x00\x00\x00\x00E\xc0\"6\n)\n\x12another_label_name\x12\x13another_label_value\x1a\t\t\x00\x00\x00\x00\x00\x00U@",
expected: model.Vector{
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_count",
"some_label_name": "some_label_value",
},
Value: -42,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_count",
"another_label_name": "another_label_value",
},
Value: 84,
Timestamp: testTime,
},
},
},
{
in: "\xb9\x01\n\rrequest_count\x12\x12Number of requests\x18\x02\"O\n#\n\x0fsome_label_name\x12\x10some_label_value\"(\x1a\x12\t\xaeG\xe1z\x14\xae\xef?\x11\x00\x00\x00\x00\x00\x00E\xc0\x1a\x12\t+\x87\x16\xd9\xce\xf7\xef?\x11\x00\x00\x00\x00\x00\x00U\xc0\"A\n)\n\x12another_label_name\x12\x13another_label_value\"\x14\x1a\x12\t\x00\x00\x00\x00\x00\x00\xe0?\x11\x00\x00\x00\x00\x00\x00$@",
expected: model.Vector{
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_count",
"some_label_name": "some_label_value",
"quantile": "0.99",
},
Value: -42,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_count",
"some_label_name": "some_label_value",
"quantile": "0.999",
},
Value: -84,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_count",
"another_label_name": "another_label_value",
"quantile": "0.5",
},
Value: 10,
Timestamp: testTime,
},
},
},
{
in: "\x8d\x01\n\x1drequest_duration_microseconds\x12\x15The response latency.\x18\x04\"S:Q\b\x85\x15\x11\xcd\xcc\xccL\x8f\xcb:A\x1a\v\b{\x11\x00\x00\x00\x00\x00\x00Y@\x1a\f\b\x9c\x03\x11\x00\x00\x00\x00\x00\x00^@\x1a\f\b\xd0\x04\x11\x00\x00\x00\x00\x00\x00b@\x1a\f\b\xf4\v\x11\x9a\x99\x99\x99\x99\x99e@\x1a\f\b\x85\x15\x11\x00\x00\x00\x00\x00\x00\xf0\u007f",
expected: model.Vector{
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_duration_microseconds_bucket",
"le": "100",
},
Value: 123,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_duration_microseconds_bucket",
"le": "120",
},
Value: 412,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_duration_microseconds_bucket",
"le": "144",
},
Value: 592,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_duration_microseconds_bucket",
"le": "172.8",
},
Value: 1524,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_duration_microseconds_bucket",
"le": "+Inf",
},
Value: 2693,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_duration_microseconds_sum",
},
Value: 1756047.3,
Timestamp: testTime,
},
&model.Sample{
Metric: model.Metric{
model.MetricNameLabel: "request_duration_microseconds_count",
},
Value: 2693,
Timestamp: testTime,
},
},
},
}
for _, scenario := range scenarios {
dec := &SampleDecoder{
Dec: &protoDecoder{r: strings.NewReader(scenario.in)},
Opts: &DecodeOptions{
Timestamp: testTime,
},
}
var all model.Vector
for {
var smpls model.Vector
err := dec.Decode(&smpls)
if err == io.EOF {
break
}
if err != nil {
t.Fatal(err)
}
all = append(all, smpls...)
}
sort.Sort(all)
sort.Sort(scenario.expected)
if !reflect.DeepEqual(all, scenario.expected) {
t.Fatalf("output does not match")
}
}
}
func testDiscriminatorHTTPHeader(t testing.TB) {
var scenarios = []struct {
input map[string]string
output Decoder
err error
}{
{
input: map[string]string{"Content-Type": `application/vnd.google.protobuf; proto="io.prometheus.client.MetricFamily"; encoding="delimited"`},
output: &protoDecoder{},
err: nil,
},
{
input: map[string]string{"Content-Type": `application/vnd.google.protobuf; proto="illegal"; encoding="delimited"`},
output: nil,
err: errors.New("unrecognized protocol message illegal"),
},
{
input: map[string]string{"Content-Type": `application/vnd.google.protobuf; proto="io.prometheus.client.MetricFamily"; encoding="illegal"`},
output: nil,
err: errors.New("unsupported encoding illegal"),
},
{
input: map[string]string{"Content-Type": `text/plain; version=0.0.4`},
output: &textDecoder{},
err: nil,
},
{
input: map[string]string{"Content-Type": `text/plain`},
output: &textDecoder{},
err: nil,
},
{
input: map[string]string{"Content-Type": `text/plain; version=0.0.3`},
output: nil,
err: errors.New("unrecognized protocol version 0.0.3"),
},
}
for i, scenario := range scenarios {
var header http.Header
if len(scenario.input) > 0 {
header = http.Header{}
}
for key, value := range scenario.input {
header.Add(key, value)
}
actual, err := NewDecoder(nil, header)
if scenario.err != err {
if scenario.err != nil && err != nil {
if scenario.err.Error() != err.Error() {
t.Errorf("%d. expected %s, got %s", i, scenario.err, err)
}
} else if scenario.err != nil || err != nil {
t.Errorf("%d. expected %s, got %s", i, scenario.err, err)
}
}
if !reflect.DeepEqual(scenario.output, actual) {
t.Errorf("%d. expected %s, got %s", i, scenario.output, actual)
}
}
}
func TestDiscriminatorHTTPHeader(t *testing.T) {
testDiscriminatorHTTPHeader(t)
}
func BenchmarkDiscriminatorHTTPHeader(b *testing.B) {
for i := 0; i < b.N; i++ {
testDiscriminatorHTTPHeader(b)
}
}

88
Godeps/_workspace/src/github.com/prometheus/common/expfmt/encode.go generated vendored Normal file
View file

@ -0,0 +1,88 @@
// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"fmt"
"io"
"net/http"
"bitbucket.org/ww/goautoneg"
"github.com/golang/protobuf/proto"
"github.com/matttproud/golang_protobuf_extensions/pbutil"
dto "github.com/prometheus/client_model/go"
)
// Encoder types encode metric families into an underlying wire protocol.
type Encoder interface {
Encode(*dto.MetricFamily) error
}
type encoder func(*dto.MetricFamily) error
func (e encoder) Encode(v *dto.MetricFamily) error {
return e(v)
}
// Negotiate returns the Content-Type based on the given Accept header.
// If no appropriate accepted type is found, FmtText is returned.
func Negotiate(h http.Header) Format {
for _, ac := range goautoneg.ParseAccept(h.Get(hdrAccept)) {
// Check for protocol buffer
if ac.Type == ProtoType && ac.SubType == ProtoSubType && ac.Params["proto"] == ProtoProtocol {
switch ac.Params["encoding"] {
case "delimited":
return FmtProtoDelim
case "text":
return FmtProtoText
case "compact-text":
return FmtProtoCompact
}
}
// Check for text format.
ver := ac.Params["version"]
if ac.Type == "text" && ac.SubType == "plain" && (ver == TextVersion || ver == "") {
return FmtText
}
}
return FmtText
}
// NewEncoder returns a new encoder based on content type negotiation.
func NewEncoder(w io.Writer, format Format) Encoder {
switch format {
case FmtProtoDelim:
return encoder(func(v *dto.MetricFamily) error {
_, err := pbutil.WriteDelimited(w, v)
return err
})
case FmtProtoCompact:
return encoder(func(v *dto.MetricFamily) error {
_, err := fmt.Fprintln(w, v.String())
return err
})
case FmtProtoText:
return encoder(func(v *dto.MetricFamily) error {
_, err := fmt.Fprintln(w, proto.MarshalTextString(v))
return err
})
case FmtText:
return encoder(func(v *dto.MetricFamily) error {
_, err := MetricFamilyToText(w, v)
return err
})
}
panic("expfmt.NewEncoder: unknown format")
}

37
Godeps/_workspace/src/github.com/prometheus/common/expfmt/expfmt.go generated vendored Normal file
View file

@ -0,0 +1,37 @@
// Copyright 2015 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// A package for reading and writing Prometheus metrics.
package expfmt
type Format string
const (
TextVersion = "0.0.4"
ProtoType = `application`
ProtoSubType = `vnd.google.protobuf`
ProtoProtocol = `io.prometheus.client.MetricFamily`
ProtoFmt = ProtoType + "/" + ProtoSubType + "; proto=" + ProtoProtocol + ";"
// The Content-Type values for the different wire protocols.
FmtText Format = `text/plain; version=` + TextVersion
FmtProtoDelim Format = ProtoFmt + ` encoding=delimited`
FmtProtoText Format = ProtoFmt + ` encoding=text`
FmtProtoCompact Format = ProtoFmt + ` encoding=compact-text`
)
const (
hdrContentType = "Content-Type"
hdrAccept = "Accept"
)

516
Godeps/_workspace/src/github.com/prometheus/common/expfmt/testdata/protobuf generated vendored Normal file
View file

@ -0,0 +1,516 @@
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6573 2069 6e20 6d69 6372 6f73 6563 6f6e
6473 2e18 0222 570a 0c0a 0768 616e 646c
6572 1201 2f22 4708 0011 0000 0000 0000
0000 1a12 0900 0000 0000 00e0 3f11 0000
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3f11 0000 0000 0000 0000 1a12 09ae 47e1
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0a12 0a07 6861 6e64 6c65 7212 072f 616c
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cccc ec3f 1100 0000 0000 0000 001a 1209
ae47 e17a 14ae ef3f 1100 0000 0000 0000
0022 600a 150a 0768 616e 646c 6572 120a
2f61 7069 2f71 7565 7279 2247 0800 1100
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cccc cccc ec3f 1100 0000 0000 0000 001a
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cdcc cccc cccc ec3f 1100 0000 0000 0000
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6572 120c 2f61 7069 2f6d 6574 7269 6373
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1100 0000 0000 0000 0022 600a 150a 0768
616e 646c 6572 120a 2f61 7069 2f71 7565
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cccc cccc ccec 3f11 0000 0000 0000 0000
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7212 082f 7374 6174 6963 2f22 4708 0011
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cccc cccc ccec 3f11 0000 0000 0000 0000
1a12 09ae 47e1 7a14 aeef 3f11 0000 0000
0000 0000 2260 0a15 0a07 6861 6e64 6c65
7212 0a70 726f 6d65 7468 6575 7322 4708
3b11 0000 0000 40c4 d040 1a12 0900 0000
0000 00e0 3f11 0000 0000 0030 7240 1a12
09cd cccc cccc ccec 3f11 0000 0000 0030
7240 1a12 09ae 47e1 7a14 aeef 3f11 0000
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7461 6c20 6e75 6d62 6572 206f 6620 4854
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6f6e 7365 5f73 697a 655f 6279 7465 7312
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102f 6170 692f 7175 6572 795f 7261 6e67
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6861 6e64 6c65 7212 0c2f 6170 692f 7461
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0000 1a12 0900 0000 0000 00e0 3f11 0000
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3f11 0000 0000 0000 0000 1a12 09ae 47e1
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225c 0a11 0a07 6861 6e64 6c65 7212 062f
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ef3f 1100 0000 0000 0000 0022 5e0a 130a
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0768 616e 646c 6572 120a 7072 6f6d 6574
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1100 0000 0000 08a0 401a 1209 ae47 e17a
14ae ef3f 1100 0000 0000 0aa0 405c 0a19
7072 6f63 6573 735f 6370 755f 7365 636f
6e64 735f 746f 7461 6c12 3054 6f74 616c
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6f70 656e 2066 696c 6520 6465 7363 7269
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0900 0000 0000 003d 404e 0a1d 7072 6f63
6573 735f 7265 7369 6465 6e74 5f6d 656d
6f72 795f 6279 7465 7312 1e52 6573 6964
656e 7420 6d65 6d6f 7279 2073 697a 6520
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0900 0000 0020 12c0 415f 0a27 7072 6f6d
6574 6865 7573 5f64 6e73 5f73 645f 6c6f
6f6b 7570 5f66 6169 6c75 7265 735f 746f
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6f66 2044 4e53 2d53 4420 6c6f 6f6b 7570
2066 6169 6c75 7265 732e 1800 220b 1a09
0900 0000 0000 0000 004f 0a1f 7072 6f6d
6574 6865 7573 5f64 6e73 5f73 645f 6c6f
6f6b 7570 735f 746f 7461 6c12 1d54 6865
206e 756d 6265 7220 6f66 2044 4e53 2d53
4420 6c6f 6f6b 7570 732e 1800 220b 1a09
0900 0000 0000 0008 40cf 010a 2a70 726f
6d65 7468 6575 735f 6576 616c 7561 746f
725f 6475 7261 7469 6f6e 5f6d 696c 6c69
7365 636f 6e64 7312 2c54 6865 2064 7572
6174 696f 6e20 666f 7220 616c 6c20 6576
616c 7561 7469 6f6e 7320 746f 2065 7865
6375 7465 2e18 0222 7122 6f08 0b11 0000
0000 0000 2240 1a12 097b 14ae 47e1 7a84
3f11 0000 0000 0000 0000 1a12 099a 9999
9999 99a9 3f11 0000 0000 0000 0000 1a12
0900 0000 0000 00e0 3f11 0000 0000 0000
0000 1a12 09cd cccc cccc ccec 3f11 0000
0000 0000 f03f 1a12 09ae 47e1 7a14 aeef
3f11 0000 0000 0000 f03f a301 0a39 7072
6f6d 6574 6865 7573 5f6c 6f63 616c 5f73
746f 7261 6765 5f63 6865 636b 706f 696e
745f 6475 7261 7469 6f6e 5f6d 696c 6c69
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2d6d 656d 6f72 7920 6d65 7472 6963 7320
616e 6420 6865 6164 2063 6875 6e6b 732e
1801 220b 1209 0900 0000 0000 0000 00f2
010a 2870 726f 6d65 7468 6575 735f 6c6f
6361 6c5f 7374 6f72 6167 655f 6368 756e
6b5f 6f70 735f 746f 7461 6c12 3354 6865
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7320 6279 2074 6865 6972 2074 7970 652e
1800 221b 0a0e 0a04 7479 7065 1206 6372
6561 7465 1a09 0900 0000 0000 b880 4022
1c0a 0f0a 0474 7970 6512 0770 6572 7369
7374 1a09 0900 0000 0000 c05b 4022 180a
0b0a 0474 7970 6512 0370 696e 1a09 0900
0000 0000 807b 4022 1e0a 110a 0474 7970
6512 0974 7261 6e73 636f 6465 1a09 0900
0000 0000 a06b 4022 1a0a 0d0a 0474 7970
6512 0575 6e70 696e 1a09 0900 0000 0000
807b 40c4 010a 3c70 726f 6d65 7468 6575
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6f72 2062 6174 6368 2069 6e64 6578 696e
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0000 0000 001a 1209 ae47 e17a 14ae ef3f
1100 0000 0000 0000 00bf 010a 2d70 726f
6d65 7468 6575 735f 6c6f 6361 6c5f 7374
6f72 6167 655f 696e 6465 7869 6e67 5f62
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7469 6c65 7320 666f 7220 696e 6465 7869
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322
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# HELP http_request_duration_microseconds The HTTP request latencies in microseconds.
# TYPE http_request_duration_microseconds summary
http_request_duration_microseconds{handler="/",quantile="0.5"} 0
http_request_duration_microseconds{handler="/",quantile="0.9"} 0
http_request_duration_microseconds{handler="/",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/"} 0
http_request_duration_microseconds_count{handler="/"} 0
http_request_duration_microseconds{handler="/alerts",quantile="0.5"} 0
http_request_duration_microseconds{handler="/alerts",quantile="0.9"} 0
http_request_duration_microseconds{handler="/alerts",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/alerts"} 0
http_request_duration_microseconds_count{handler="/alerts"} 0
http_request_duration_microseconds{handler="/api/metrics",quantile="0.5"} 0
http_request_duration_microseconds{handler="/api/metrics",quantile="0.9"} 0
http_request_duration_microseconds{handler="/api/metrics",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/api/metrics"} 0
http_request_duration_microseconds_count{handler="/api/metrics"} 0
http_request_duration_microseconds{handler="/api/query",quantile="0.5"} 0
http_request_duration_microseconds{handler="/api/query",quantile="0.9"} 0
http_request_duration_microseconds{handler="/api/query",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/api/query"} 0
http_request_duration_microseconds_count{handler="/api/query"} 0
http_request_duration_microseconds{handler="/api/query_range",quantile="0.5"} 0
http_request_duration_microseconds{handler="/api/query_range",quantile="0.9"} 0
http_request_duration_microseconds{handler="/api/query_range",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/api/query_range"} 0
http_request_duration_microseconds_count{handler="/api/query_range"} 0
http_request_duration_microseconds{handler="/api/targets",quantile="0.5"} 0
http_request_duration_microseconds{handler="/api/targets",quantile="0.9"} 0
http_request_duration_microseconds{handler="/api/targets",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/api/targets"} 0
http_request_duration_microseconds_count{handler="/api/targets"} 0
http_request_duration_microseconds{handler="/consoles/",quantile="0.5"} 0
http_request_duration_microseconds{handler="/consoles/",quantile="0.9"} 0
http_request_duration_microseconds{handler="/consoles/",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/consoles/"} 0
http_request_duration_microseconds_count{handler="/consoles/"} 0
http_request_duration_microseconds{handler="/graph",quantile="0.5"} 0
http_request_duration_microseconds{handler="/graph",quantile="0.9"} 0
http_request_duration_microseconds{handler="/graph",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/graph"} 0
http_request_duration_microseconds_count{handler="/graph"} 0
http_request_duration_microseconds{handler="/heap",quantile="0.5"} 0
http_request_duration_microseconds{handler="/heap",quantile="0.9"} 0
http_request_duration_microseconds{handler="/heap",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/heap"} 0
http_request_duration_microseconds_count{handler="/heap"} 0
http_request_duration_microseconds{handler="/static/",quantile="0.5"} 0
http_request_duration_microseconds{handler="/static/",quantile="0.9"} 0
http_request_duration_microseconds{handler="/static/",quantile="0.99"} 0
http_request_duration_microseconds_sum{handler="/static/"} 0
http_request_duration_microseconds_count{handler="/static/"} 0
http_request_duration_microseconds{handler="prometheus",quantile="0.5"} 1307.275
http_request_duration_microseconds{handler="prometheus",quantile="0.9"} 1858.632
http_request_duration_microseconds{handler="prometheus",quantile="0.99"} 3087.384
http_request_duration_microseconds_sum{handler="prometheus"} 179886.5000000001
http_request_duration_microseconds_count{handler="prometheus"} 119
# HELP http_request_size_bytes The HTTP request sizes in bytes.
# TYPE http_request_size_bytes summary
http_request_size_bytes{handler="/",quantile="0.5"} 0
http_request_size_bytes{handler="/",quantile="0.9"} 0
http_request_size_bytes{handler="/",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/"} 0
http_request_size_bytes_count{handler="/"} 0
http_request_size_bytes{handler="/alerts",quantile="0.5"} 0
http_request_size_bytes{handler="/alerts",quantile="0.9"} 0
http_request_size_bytes{handler="/alerts",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/alerts"} 0
http_request_size_bytes_count{handler="/alerts"} 0
http_request_size_bytes{handler="/api/metrics",quantile="0.5"} 0
http_request_size_bytes{handler="/api/metrics",quantile="0.9"} 0
http_request_size_bytes{handler="/api/metrics",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/api/metrics"} 0
http_request_size_bytes_count{handler="/api/metrics"} 0
http_request_size_bytes{handler="/api/query",quantile="0.5"} 0
http_request_size_bytes{handler="/api/query",quantile="0.9"} 0
http_request_size_bytes{handler="/api/query",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/api/query"} 0
http_request_size_bytes_count{handler="/api/query"} 0
http_request_size_bytes{handler="/api/query_range",quantile="0.5"} 0
http_request_size_bytes{handler="/api/query_range",quantile="0.9"} 0
http_request_size_bytes{handler="/api/query_range",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/api/query_range"} 0
http_request_size_bytes_count{handler="/api/query_range"} 0
http_request_size_bytes{handler="/api/targets",quantile="0.5"} 0
http_request_size_bytes{handler="/api/targets",quantile="0.9"} 0
http_request_size_bytes{handler="/api/targets",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/api/targets"} 0
http_request_size_bytes_count{handler="/api/targets"} 0
http_request_size_bytes{handler="/consoles/",quantile="0.5"} 0
http_request_size_bytes{handler="/consoles/",quantile="0.9"} 0
http_request_size_bytes{handler="/consoles/",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/consoles/"} 0
http_request_size_bytes_count{handler="/consoles/"} 0
http_request_size_bytes{handler="/graph",quantile="0.5"} 0
http_request_size_bytes{handler="/graph",quantile="0.9"} 0
http_request_size_bytes{handler="/graph",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/graph"} 0
http_request_size_bytes_count{handler="/graph"} 0
http_request_size_bytes{handler="/heap",quantile="0.5"} 0
http_request_size_bytes{handler="/heap",quantile="0.9"} 0
http_request_size_bytes{handler="/heap",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/heap"} 0
http_request_size_bytes_count{handler="/heap"} 0
http_request_size_bytes{handler="/static/",quantile="0.5"} 0
http_request_size_bytes{handler="/static/",quantile="0.9"} 0
http_request_size_bytes{handler="/static/",quantile="0.99"} 0
http_request_size_bytes_sum{handler="/static/"} 0
http_request_size_bytes_count{handler="/static/"} 0
http_request_size_bytes{handler="prometheus",quantile="0.5"} 291
http_request_size_bytes{handler="prometheus",quantile="0.9"} 291
http_request_size_bytes{handler="prometheus",quantile="0.99"} 291
http_request_size_bytes_sum{handler="prometheus"} 34488
http_request_size_bytes_count{handler="prometheus"} 119
# HELP http_requests_total Total number of HTTP requests made.
# TYPE http_requests_total counter
http_requests_total{code="200",handler="prometheus",method="get"} 119
# HELP http_response_size_bytes The HTTP response sizes in bytes.
# TYPE http_response_size_bytes summary
http_response_size_bytes{handler="/",quantile="0.5"} 0
http_response_size_bytes{handler="/",quantile="0.9"} 0
http_response_size_bytes{handler="/",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/"} 0
http_response_size_bytes_count{handler="/"} 0
http_response_size_bytes{handler="/alerts",quantile="0.5"} 0
http_response_size_bytes{handler="/alerts",quantile="0.9"} 0
http_response_size_bytes{handler="/alerts",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/alerts"} 0
http_response_size_bytes_count{handler="/alerts"} 0
http_response_size_bytes{handler="/api/metrics",quantile="0.5"} 0
http_response_size_bytes{handler="/api/metrics",quantile="0.9"} 0
http_response_size_bytes{handler="/api/metrics",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/api/metrics"} 0
http_response_size_bytes_count{handler="/api/metrics"} 0
http_response_size_bytes{handler="/api/query",quantile="0.5"} 0
http_response_size_bytes{handler="/api/query",quantile="0.9"} 0
http_response_size_bytes{handler="/api/query",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/api/query"} 0
http_response_size_bytes_count{handler="/api/query"} 0
http_response_size_bytes{handler="/api/query_range",quantile="0.5"} 0
http_response_size_bytes{handler="/api/query_range",quantile="0.9"} 0
http_response_size_bytes{handler="/api/query_range",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/api/query_range"} 0
http_response_size_bytes_count{handler="/api/query_range"} 0
http_response_size_bytes{handler="/api/targets",quantile="0.5"} 0
http_response_size_bytes{handler="/api/targets",quantile="0.9"} 0
http_response_size_bytes{handler="/api/targets",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/api/targets"} 0
http_response_size_bytes_count{handler="/api/targets"} 0
http_response_size_bytes{handler="/consoles/",quantile="0.5"} 0
http_response_size_bytes{handler="/consoles/",quantile="0.9"} 0
http_response_size_bytes{handler="/consoles/",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/consoles/"} 0
http_response_size_bytes_count{handler="/consoles/"} 0
http_response_size_bytes{handler="/graph",quantile="0.5"} 0
http_response_size_bytes{handler="/graph",quantile="0.9"} 0
http_response_size_bytes{handler="/graph",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/graph"} 0
http_response_size_bytes_count{handler="/graph"} 0
http_response_size_bytes{handler="/heap",quantile="0.5"} 0
http_response_size_bytes{handler="/heap",quantile="0.9"} 0
http_response_size_bytes{handler="/heap",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/heap"} 0
http_response_size_bytes_count{handler="/heap"} 0
http_response_size_bytes{handler="/static/",quantile="0.5"} 0
http_response_size_bytes{handler="/static/",quantile="0.9"} 0
http_response_size_bytes{handler="/static/",quantile="0.99"} 0
http_response_size_bytes_sum{handler="/static/"} 0
http_response_size_bytes_count{handler="/static/"} 0
http_response_size_bytes{handler="prometheus",quantile="0.5"} 2049
http_response_size_bytes{handler="prometheus",quantile="0.9"} 2058
http_response_size_bytes{handler="prometheus",quantile="0.99"} 2064
http_response_size_bytes_sum{handler="prometheus"} 247001
http_response_size_bytes_count{handler="prometheus"} 119
# HELP process_cpu_seconds_total Total user and system CPU time spent in seconds.
# TYPE process_cpu_seconds_total counter
process_cpu_seconds_total 0.55
# HELP go_goroutines Number of goroutines that currently exist.
# TYPE go_goroutines gauge
go_goroutines 70
# HELP process_max_fds Maximum number of open file descriptors.
# TYPE process_max_fds gauge
process_max_fds 8192
# HELP process_open_fds Number of open file descriptors.
# TYPE process_open_fds gauge
process_open_fds 29
# HELP process_resident_memory_bytes Resident memory size in bytes.
# TYPE process_resident_memory_bytes gauge
process_resident_memory_bytes 5.3870592e+07
# HELP process_start_time_seconds Start time of the process since unix epoch in seconds.
# TYPE process_start_time_seconds gauge
process_start_time_seconds 1.42236894836e+09
# HELP process_virtual_memory_bytes Virtual memory size in bytes.
# TYPE process_virtual_memory_bytes gauge
process_virtual_memory_bytes 5.41478912e+08
# HELP prometheus_dns_sd_lookup_failures_total The number of DNS-SD lookup failures.
# TYPE prometheus_dns_sd_lookup_failures_total counter
prometheus_dns_sd_lookup_failures_total 0
# HELP prometheus_dns_sd_lookups_total The number of DNS-SD lookups.
# TYPE prometheus_dns_sd_lookups_total counter
prometheus_dns_sd_lookups_total 7
# HELP prometheus_evaluator_duration_milliseconds The duration for all evaluations to execute.
# TYPE prometheus_evaluator_duration_milliseconds summary
prometheus_evaluator_duration_milliseconds{quantile="0.01"} 0
prometheus_evaluator_duration_milliseconds{quantile="0.05"} 0
prometheus_evaluator_duration_milliseconds{quantile="0.5"} 0
prometheus_evaluator_duration_milliseconds{quantile="0.9"} 1
prometheus_evaluator_duration_milliseconds{quantile="0.99"} 1
prometheus_evaluator_duration_milliseconds_sum 12
prometheus_evaluator_duration_milliseconds_count 23
# HELP prometheus_local_storage_checkpoint_duration_milliseconds The duration (in milliseconds) it took to checkpoint in-memory metrics and head chunks.
# TYPE prometheus_local_storage_checkpoint_duration_milliseconds gauge
prometheus_local_storage_checkpoint_duration_milliseconds 0
# HELP prometheus_local_storage_chunk_ops_total The total number of chunk operations by their type.
# TYPE prometheus_local_storage_chunk_ops_total counter
prometheus_local_storage_chunk_ops_total{type="create"} 598
prometheus_local_storage_chunk_ops_total{type="persist"} 174
prometheus_local_storage_chunk_ops_total{type="pin"} 920
prometheus_local_storage_chunk_ops_total{type="transcode"} 415
prometheus_local_storage_chunk_ops_total{type="unpin"} 920
# HELP prometheus_local_storage_indexing_batch_latency_milliseconds Quantiles for batch indexing latencies in milliseconds.
# TYPE prometheus_local_storage_indexing_batch_latency_milliseconds summary
prometheus_local_storage_indexing_batch_latency_milliseconds{quantile="0.5"} 0
prometheus_local_storage_indexing_batch_latency_milliseconds{quantile="0.9"} 0
prometheus_local_storage_indexing_batch_latency_milliseconds{quantile="0.99"} 0
prometheus_local_storage_indexing_batch_latency_milliseconds_sum 0
prometheus_local_storage_indexing_batch_latency_milliseconds_count 1
# HELP prometheus_local_storage_indexing_batch_sizes Quantiles for indexing batch sizes (number of metrics per batch).
# TYPE prometheus_local_storage_indexing_batch_sizes summary
prometheus_local_storage_indexing_batch_sizes{quantile="0.5"} 2
prometheus_local_storage_indexing_batch_sizes{quantile="0.9"} 2
prometheus_local_storage_indexing_batch_sizes{quantile="0.99"} 2
prometheus_local_storage_indexing_batch_sizes_sum 2
prometheus_local_storage_indexing_batch_sizes_count 1
# HELP prometheus_local_storage_indexing_queue_capacity The capacity of the indexing queue.
# TYPE prometheus_local_storage_indexing_queue_capacity gauge
prometheus_local_storage_indexing_queue_capacity 16384
# HELP prometheus_local_storage_indexing_queue_length The number of metrics waiting to be indexed.
# TYPE prometheus_local_storage_indexing_queue_length gauge
prometheus_local_storage_indexing_queue_length 0
# HELP prometheus_local_storage_ingested_samples_total The total number of samples ingested.
# TYPE prometheus_local_storage_ingested_samples_total counter
prometheus_local_storage_ingested_samples_total 30473
# HELP prometheus_local_storage_invalid_preload_requests_total The total number of preload requests referring to a non-existent series. This is an indication of outdated label indexes.
# TYPE prometheus_local_storage_invalid_preload_requests_total counter
prometheus_local_storage_invalid_preload_requests_total 0
# HELP prometheus_local_storage_memory_chunkdescs The current number of chunk descriptors in memory.
# TYPE prometheus_local_storage_memory_chunkdescs gauge
prometheus_local_storage_memory_chunkdescs 1059
# HELP prometheus_local_storage_memory_chunks The current number of chunks in memory, excluding cloned chunks (i.e. chunks without a descriptor).
# TYPE prometheus_local_storage_memory_chunks gauge
prometheus_local_storage_memory_chunks 1020
# HELP prometheus_local_storage_memory_series The current number of series in memory.
# TYPE prometheus_local_storage_memory_series gauge
prometheus_local_storage_memory_series 424
# HELP prometheus_local_storage_persist_latency_microseconds A summary of latencies for persisting each chunk.
# TYPE prometheus_local_storage_persist_latency_microseconds summary
prometheus_local_storage_persist_latency_microseconds{quantile="0.5"} 30.377
prometheus_local_storage_persist_latency_microseconds{quantile="0.9"} 203.539
prometheus_local_storage_persist_latency_microseconds{quantile="0.99"} 2626.463
prometheus_local_storage_persist_latency_microseconds_sum 20424.415
prometheus_local_storage_persist_latency_microseconds_count 174
# HELP prometheus_local_storage_persist_queue_capacity The total capacity of the persist queue.
# TYPE prometheus_local_storage_persist_queue_capacity gauge
prometheus_local_storage_persist_queue_capacity 1024
# HELP prometheus_local_storage_persist_queue_length The current number of chunks waiting in the persist queue.
# TYPE prometheus_local_storage_persist_queue_length gauge
prometheus_local_storage_persist_queue_length 0
# HELP prometheus_local_storage_series_ops_total The total number of series operations by their type.
# TYPE prometheus_local_storage_series_ops_total counter
prometheus_local_storage_series_ops_total{type="create"} 2
prometheus_local_storage_series_ops_total{type="maintenance_in_memory"} 11
# HELP prometheus_notifications_latency_milliseconds Latency quantiles for sending alert notifications (not including dropped notifications).
# TYPE prometheus_notifications_latency_milliseconds summary
prometheus_notifications_latency_milliseconds{quantile="0.5"} 0
prometheus_notifications_latency_milliseconds{quantile="0.9"} 0
prometheus_notifications_latency_milliseconds{quantile="0.99"} 0
prometheus_notifications_latency_milliseconds_sum 0
prometheus_notifications_latency_milliseconds_count 0
# HELP prometheus_notifications_queue_capacity The capacity of the alert notifications queue.
# TYPE prometheus_notifications_queue_capacity gauge
prometheus_notifications_queue_capacity 100
# HELP prometheus_notifications_queue_length The number of alert notifications in the queue.
# TYPE prometheus_notifications_queue_length gauge
prometheus_notifications_queue_length 0
# HELP prometheus_rule_evaluation_duration_milliseconds The duration for a rule to execute.
# TYPE prometheus_rule_evaluation_duration_milliseconds summary
prometheus_rule_evaluation_duration_milliseconds{rule_type="alerting",quantile="0.5"} 0
prometheus_rule_evaluation_duration_milliseconds{rule_type="alerting",quantile="0.9"} 0
prometheus_rule_evaluation_duration_milliseconds{rule_type="alerting",quantile="0.99"} 2
prometheus_rule_evaluation_duration_milliseconds_sum{rule_type="alerting"} 12
prometheus_rule_evaluation_duration_milliseconds_count{rule_type="alerting"} 115
prometheus_rule_evaluation_duration_milliseconds{rule_type="recording",quantile="0.5"} 0
prometheus_rule_evaluation_duration_milliseconds{rule_type="recording",quantile="0.9"} 0
prometheus_rule_evaluation_duration_milliseconds{rule_type="recording",quantile="0.99"} 3
prometheus_rule_evaluation_duration_milliseconds_sum{rule_type="recording"} 15
prometheus_rule_evaluation_duration_milliseconds_count{rule_type="recording"} 115
# HELP prometheus_rule_evaluation_failures_total The total number of rule evaluation failures.
# TYPE prometheus_rule_evaluation_failures_total counter
prometheus_rule_evaluation_failures_total 0
# HELP prometheus_samples_queue_capacity Capacity of the queue for unwritten samples.
# TYPE prometheus_samples_queue_capacity gauge
prometheus_samples_queue_capacity 4096
# HELP prometheus_samples_queue_length Current number of items in the queue for unwritten samples. Each item comprises all samples exposed by one target as one metric family (i.e. metrics of the same name).
# TYPE prometheus_samples_queue_length gauge
prometheus_samples_queue_length 0
# HELP prometheus_target_interval_length_seconds Actual intervals between scrapes.
# TYPE prometheus_target_interval_length_seconds summary
prometheus_target_interval_length_seconds{interval="15s",quantile="0.01"} 14
prometheus_target_interval_length_seconds{interval="15s",quantile="0.05"} 14
prometheus_target_interval_length_seconds{interval="15s",quantile="0.5"} 15
prometheus_target_interval_length_seconds{interval="15s",quantile="0.9"} 15
prometheus_target_interval_length_seconds{interval="15s",quantile="0.99"} 15
prometheus_target_interval_length_seconds_sum{interval="15s"} 175
prometheus_target_interval_length_seconds_count{interval="15s"} 12
prometheus_target_interval_length_seconds{interval="1s",quantile="0.01"} 0
prometheus_target_interval_length_seconds{interval="1s",quantile="0.05"} 0
prometheus_target_interval_length_seconds{interval="1s",quantile="0.5"} 0
prometheus_target_interval_length_seconds{interval="1s",quantile="0.9"} 1
prometheus_target_interval_length_seconds{interval="1s",quantile="0.99"} 1
prometheus_target_interval_length_seconds_sum{interval="1s"} 55
prometheus_target_interval_length_seconds_count{interval="1s"} 117

308
Godeps/_workspace/src/github.com/prometheus/common/expfmt/text_create.go generated vendored Normal file
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@ -0,0 +1,308 @@
// Copyright 2014 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"bytes"
"fmt"
"io"
"math"
"strings"
dto "github.com/prometheus/client_model/go"
"github.com/prometheus/common/model"
)
// MetricFamilyToText converts a MetricFamily proto message into text format and
// writes the resulting lines to 'out'. It returns the number of bytes written
// and any error encountered. This function does not perform checks on the
// content of the metric and label names, i.e. invalid metric or label names
// will result in invalid text format output.
// This method fulfills the type 'prometheus.encoder'.
func MetricFamilyToText(out io.Writer, in *dto.MetricFamily) (int, error) {
var written int
// Fail-fast checks.
if len(in.Metric) == 0 {
return written, fmt.Errorf("MetricFamily has no metrics: %s", in)
}
name := in.GetName()
if name == "" {
return written, fmt.Errorf("MetricFamily has no name: %s", in)
}
if in.Type == nil {
return written, fmt.Errorf("MetricFamily has no type: %s", in)
}
// Comments, first HELP, then TYPE.
if in.Help != nil {
n, err := fmt.Fprintf(
out, "# HELP %s %s\n",
name, escapeString(*in.Help, false),
)
written += n
if err != nil {
return written, err
}
}
metricType := in.GetType()
n, err := fmt.Fprintf(
out, "# TYPE %s %s\n",
name, strings.ToLower(metricType.String()),
)
written += n
if err != nil {
return written, err
}
// Finally the samples, one line for each.
for _, metric := range in.Metric {
switch metricType {
case dto.MetricType_COUNTER:
if metric.Counter == nil {
return written, fmt.Errorf(
"expected counter in metric %s %s", name, metric,
)
}
n, err = writeSample(
name, metric, "", "",
metric.Counter.GetValue(),
out,
)
case dto.MetricType_GAUGE:
if metric.Gauge == nil {
return written, fmt.Errorf(
"expected gauge in metric %s %s", name, metric,
)
}
n, err = writeSample(
name, metric, "", "",
metric.Gauge.GetValue(),
out,
)
case dto.MetricType_UNTYPED:
if metric.Untyped == nil {
return written, fmt.Errorf(
"expected untyped in metric %s %s", name, metric,
)
}
n, err = writeSample(
name, metric, "", "",
metric.Untyped.GetValue(),
out,
)
case dto.MetricType_SUMMARY:
if metric.Summary == nil {
return written, fmt.Errorf(
"expected summary in metric %s %s", name, metric,
)
}
for _, q := range metric.Summary.Quantile {
n, err = writeSample(
name, metric,
model.QuantileLabel, fmt.Sprint(q.GetQuantile()),
q.GetValue(),
out,
)
written += n
if err != nil {
return written, err
}
}
n, err = writeSample(
name+"_sum", metric, "", "",
metric.Summary.GetSampleSum(),
out,
)
if err != nil {
return written, err
}
written += n
n, err = writeSample(
name+"_count", metric, "", "",
float64(metric.Summary.GetSampleCount()),
out,
)
case dto.MetricType_HISTOGRAM:
if metric.Histogram == nil {
return written, fmt.Errorf(
"expected histogram in metric %s %s", name, metric,
)
}
infSeen := false
for _, q := range metric.Histogram.Bucket {
n, err = writeSample(
name+"_bucket", metric,
model.BucketLabel, fmt.Sprint(q.GetUpperBound()),
float64(q.GetCumulativeCount()),
out,
)
written += n
if err != nil {
return written, err
}
if math.IsInf(q.GetUpperBound(), +1) {
infSeen = true
}
}
if !infSeen {
n, err = writeSample(
name+"_bucket", metric,
model.BucketLabel, "+Inf",
float64(metric.Histogram.GetSampleCount()),
out,
)
if err != nil {
return written, err
}
written += n
}
n, err = writeSample(
name+"_sum", metric, "", "",
metric.Histogram.GetSampleSum(),
out,
)
if err != nil {
return written, err
}
written += n
n, err = writeSample(
name+"_count", metric, "", "",
float64(metric.Histogram.GetSampleCount()),
out,
)
default:
return written, fmt.Errorf(
"unexpected type in metric %s %s", name, metric,
)
}
written += n
if err != nil {
return written, err
}
}
return written, nil
}
// writeSample writes a single sample in text format to out, given the metric
// name, the metric proto message itself, optionally an additional label name
// and value (use empty strings if not required), and the value. The function
// returns the number of bytes written and any error encountered.
func writeSample(
name string,
metric *dto.Metric,
additionalLabelName, additionalLabelValue string,
value float64,
out io.Writer,
) (int, error) {
var written int
n, err := fmt.Fprint(out, name)
written += n
if err != nil {
return written, err
}
n, err = labelPairsToText(
metric.Label,
additionalLabelName, additionalLabelValue,
out,
)
written += n
if err != nil {
return written, err
}
n, err = fmt.Fprintf(out, " %v", value)
written += n
if err != nil {
return written, err
}
if metric.TimestampMs != nil {
n, err = fmt.Fprintf(out, " %v", *metric.TimestampMs)
written += n
if err != nil {
return written, err
}
}
n, err = out.Write([]byte{'\n'})
written += n
if err != nil {
return written, err
}
return written, nil
}
// labelPairsToText converts a slice of LabelPair proto messages plus the
// explicitly given additional label pair into text formatted as required by the
// text format and writes it to 'out'. An empty slice in combination with an
// empty string 'additionalLabelName' results in nothing being
// written. Otherwise, the label pairs are written, escaped as required by the
// text format, and enclosed in '{...}'. The function returns the number of
// bytes written and any error encountered.
func labelPairsToText(
in []*dto.LabelPair,
additionalLabelName, additionalLabelValue string,
out io.Writer,
) (int, error) {
if len(in) == 0 && additionalLabelName == "" {
return 0, nil
}
var written int
separator := '{'
for _, lp := range in {
n, err := fmt.Fprintf(
out, `%c%s="%s"`,
separator, lp.GetName(), escapeString(lp.GetValue(), true),
)
written += n
if err != nil {
return written, err
}
separator = ','
}
if additionalLabelName != "" {
n, err := fmt.Fprintf(
out, `%c%s="%s"`,
separator, additionalLabelName,
escapeString(additionalLabelValue, true),
)
written += n
if err != nil {
return written, err
}
}
n, err := out.Write([]byte{'}'})
written += n
if err != nil {
return written, err
}
return written, nil
}
// escapeString replaces '\' by '\\', new line character by '\n', and - if
// includeDoubleQuote is true - '"' by '\"'.
func escapeString(v string, includeDoubleQuote bool) string {
result := bytes.NewBuffer(make([]byte, 0, len(v)))
for _, c := range v {
switch {
case c == '\\':
result.WriteString(`\\`)
case includeDoubleQuote && c == '"':
result.WriteString(`\"`)
case c == '\n':
result.WriteString(`\n`)
default:
result.WriteRune(c)
}
}
return result.String()
}

440
Godeps/_workspace/src/github.com/prometheus/common/expfmt/text_create_test.go generated vendored Normal file
View file

@ -0,0 +1,440 @@
// Copyright 2014 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"bytes"
"math"
"strings"
"testing"
"github.com/golang/protobuf/proto"
dto "github.com/prometheus/client_model/go"
)
func testCreate(t testing.TB) {
var scenarios = []struct {
in *dto.MetricFamily
out string
}{
// 0: Counter, NaN as value, timestamp given.
{
in: &dto.MetricFamily{
Name: proto.String("name"),
Help: proto.String("two-line\n doc str\\ing"),
Type: dto.MetricType_COUNTER.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("labelname"),
Value: proto.String("val1"),
},
&dto.LabelPair{
Name: proto.String("basename"),
Value: proto.String("basevalue"),
},
},
Counter: &dto.Counter{
Value: proto.Float64(math.NaN()),
},
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("labelname"),
Value: proto.String("val2"),
},
&dto.LabelPair{
Name: proto.String("basename"),
Value: proto.String("basevalue"),
},
},
Counter: &dto.Counter{
Value: proto.Float64(.23),
},
TimestampMs: proto.Int64(1234567890),
},
},
},
out: `# HELP name two-line\n doc str\\ing
# TYPE name counter
name{labelname="val1",basename="basevalue"} NaN
name{labelname="val2",basename="basevalue"} 0.23 1234567890
`,
},
// 1: Gauge, some escaping required, +Inf as value, multi-byte characters in label values.
{
in: &dto.MetricFamily{
Name: proto.String("gauge_name"),
Help: proto.String("gauge\ndoc\nstr\"ing"),
Type: dto.MetricType_GAUGE.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("name_1"),
Value: proto.String("val with\nnew line"),
},
&dto.LabelPair{
Name: proto.String("name_2"),
Value: proto.String("val with \\backslash and \"quotes\""),
},
},
Gauge: &dto.Gauge{
Value: proto.Float64(math.Inf(+1)),
},
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("name_1"),
Value: proto.String("Björn"),
},
&dto.LabelPair{
Name: proto.String("name_2"),
Value: proto.String("佖佥"),
},
},
Gauge: &dto.Gauge{
Value: proto.Float64(3.14E42),
},
},
},
},
out: `# HELP gauge_name gauge\ndoc\nstr"ing
# TYPE gauge_name gauge
gauge_name{name_1="val with\nnew line",name_2="val with \\backslash and \"quotes\""} +Inf
gauge_name{name_1="Björn",name_2="佖佥"} 3.14e+42
`,
},
// 2: Untyped, no help, one sample with no labels and -Inf as value, another sample with one label.
{
in: &dto.MetricFamily{
Name: proto.String("untyped_name"),
Type: dto.MetricType_UNTYPED.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(math.Inf(-1)),
},
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("name_1"),
Value: proto.String("value 1"),
},
},
Untyped: &dto.Untyped{
Value: proto.Float64(-1.23e-45),
},
},
},
},
out: `# TYPE untyped_name untyped
untyped_name -Inf
untyped_name{name_1="value 1"} -1.23e-45
`,
},
// 3: Summary.
{
in: &dto.MetricFamily{
Name: proto.String("summary_name"),
Help: proto.String("summary docstring"),
Type: dto.MetricType_SUMMARY.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Summary: &dto.Summary{
SampleCount: proto.Uint64(42),
SampleSum: proto.Float64(-3.4567),
Quantile: []*dto.Quantile{
&dto.Quantile{
Quantile: proto.Float64(0.5),
Value: proto.Float64(-1.23),
},
&dto.Quantile{
Quantile: proto.Float64(0.9),
Value: proto.Float64(.2342354),
},
&dto.Quantile{
Quantile: proto.Float64(0.99),
Value: proto.Float64(0),
},
},
},
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("name_1"),
Value: proto.String("value 1"),
},
&dto.LabelPair{
Name: proto.String("name_2"),
Value: proto.String("value 2"),
},
},
Summary: &dto.Summary{
SampleCount: proto.Uint64(4711),
SampleSum: proto.Float64(2010.1971),
Quantile: []*dto.Quantile{
&dto.Quantile{
Quantile: proto.Float64(0.5),
Value: proto.Float64(1),
},
&dto.Quantile{
Quantile: proto.Float64(0.9),
Value: proto.Float64(2),
},
&dto.Quantile{
Quantile: proto.Float64(0.99),
Value: proto.Float64(3),
},
},
},
},
},
},
out: `# HELP summary_name summary docstring
# TYPE summary_name summary
summary_name{quantile="0.5"} -1.23
summary_name{quantile="0.9"} 0.2342354
summary_name{quantile="0.99"} 0
summary_name_sum -3.4567
summary_name_count 42
summary_name{name_1="value 1",name_2="value 2",quantile="0.5"} 1
summary_name{name_1="value 1",name_2="value 2",quantile="0.9"} 2
summary_name{name_1="value 1",name_2="value 2",quantile="0.99"} 3
summary_name_sum{name_1="value 1",name_2="value 2"} 2010.1971
summary_name_count{name_1="value 1",name_2="value 2"} 4711
`,
},
// 4: Histogram
{
in: &dto.MetricFamily{
Name: proto.String("request_duration_microseconds"),
Help: proto.String("The response latency."),
Type: dto.MetricType_HISTOGRAM.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Histogram: &dto.Histogram{
SampleCount: proto.Uint64(2693),
SampleSum: proto.Float64(1756047.3),
Bucket: []*dto.Bucket{
&dto.Bucket{
UpperBound: proto.Float64(100),
CumulativeCount: proto.Uint64(123),
},
&dto.Bucket{
UpperBound: proto.Float64(120),
CumulativeCount: proto.Uint64(412),
},
&dto.Bucket{
UpperBound: proto.Float64(144),
CumulativeCount: proto.Uint64(592),
},
&dto.Bucket{
UpperBound: proto.Float64(172.8),
CumulativeCount: proto.Uint64(1524),
},
&dto.Bucket{
UpperBound: proto.Float64(math.Inf(+1)),
CumulativeCount: proto.Uint64(2693),
},
},
},
},
},
},
out: `# HELP request_duration_microseconds The response latency.
# TYPE request_duration_microseconds histogram
request_duration_microseconds_bucket{le="100"} 123
request_duration_microseconds_bucket{le="120"} 412
request_duration_microseconds_bucket{le="144"} 592
request_duration_microseconds_bucket{le="172.8"} 1524
request_duration_microseconds_bucket{le="+Inf"} 2693
request_duration_microseconds_sum 1.7560473e+06
request_duration_microseconds_count 2693
`,
},
// 5: Histogram with missing +Inf bucket.
{
in: &dto.MetricFamily{
Name: proto.String("request_duration_microseconds"),
Help: proto.String("The response latency."),
Type: dto.MetricType_HISTOGRAM.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Histogram: &dto.Histogram{
SampleCount: proto.Uint64(2693),
SampleSum: proto.Float64(1756047.3),
Bucket: []*dto.Bucket{
&dto.Bucket{
UpperBound: proto.Float64(100),
CumulativeCount: proto.Uint64(123),
},
&dto.Bucket{
UpperBound: proto.Float64(120),
CumulativeCount: proto.Uint64(412),
},
&dto.Bucket{
UpperBound: proto.Float64(144),
CumulativeCount: proto.Uint64(592),
},
&dto.Bucket{
UpperBound: proto.Float64(172.8),
CumulativeCount: proto.Uint64(1524),
},
},
},
},
},
},
out: `# HELP request_duration_microseconds The response latency.
# TYPE request_duration_microseconds histogram
request_duration_microseconds_bucket{le="100"} 123
request_duration_microseconds_bucket{le="120"} 412
request_duration_microseconds_bucket{le="144"} 592
request_duration_microseconds_bucket{le="172.8"} 1524
request_duration_microseconds_bucket{le="+Inf"} 2693
request_duration_microseconds_sum 1.7560473e+06
request_duration_microseconds_count 2693
`,
},
}
for i, scenario := range scenarios {
out := bytes.NewBuffer(make([]byte, 0, len(scenario.out)))
n, err := MetricFamilyToText(out, scenario.in)
if err != nil {
t.Errorf("%d. error: %s", i, err)
continue
}
if expected, got := len(scenario.out), n; expected != got {
t.Errorf(
"%d. expected %d bytes written, got %d",
i, expected, got,
)
}
if expected, got := scenario.out, out.String(); expected != got {
t.Errorf(
"%d. expected out=%q, got %q",
i, expected, got,
)
}
}
}
func TestCreate(t *testing.T) {
testCreate(t)
}
func BenchmarkCreate(b *testing.B) {
for i := 0; i < b.N; i++ {
testCreate(b)
}
}
func testCreateError(t testing.TB) {
var scenarios = []struct {
in *dto.MetricFamily
err string
}{
// 0: No metric.
{
in: &dto.MetricFamily{
Name: proto.String("name"),
Help: proto.String("doc string"),
Type: dto.MetricType_COUNTER.Enum(),
Metric: []*dto.Metric{},
},
err: "MetricFamily has no metrics",
},
// 1: No metric name.
{
in: &dto.MetricFamily{
Help: proto.String("doc string"),
Type: dto.MetricType_UNTYPED.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(math.Inf(-1)),
},
},
},
},
err: "MetricFamily has no name",
},
// 2: No metric type.
{
in: &dto.MetricFamily{
Name: proto.String("name"),
Help: proto.String("doc string"),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(math.Inf(-1)),
},
},
},
},
err: "MetricFamily has no type",
},
// 3: Wrong type.
{
in: &dto.MetricFamily{
Name: proto.String("name"),
Help: proto.String("doc string"),
Type: dto.MetricType_COUNTER.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(math.Inf(-1)),
},
},
},
},
err: "expected counter in metric",
},
}
for i, scenario := range scenarios {
var out bytes.Buffer
_, err := MetricFamilyToText(&out, scenario.in)
if err == nil {
t.Errorf("%d. expected error, got nil", i)
continue
}
if expected, got := scenario.err, err.Error(); strings.Index(got, expected) != 0 {
t.Errorf(
"%d. expected error starting with %q, got %q",
i, expected, got,
)
}
}
}
func TestCreateError(t *testing.T) {
testCreateError(t)
}
func BenchmarkCreateError(b *testing.B) {
for i := 0; i < b.N; i++ {
testCreateError(b)
}
}

746
Godeps/_workspace/src/github.com/prometheus/common/expfmt/text_parse.go generated vendored Normal file
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// Copyright 2014 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"bufio"
"bytes"
"fmt"
"io"
"math"
"strconv"
"strings"
dto "github.com/prometheus/client_model/go"
"github.com/golang/protobuf/proto"
"github.com/prometheus/common/model"
)
// A stateFn is a function that represents a state in a state machine. By
// executing it, the state is progressed to the next state. The stateFn returns
// another stateFn, which represents the new state. The end state is represented
// by nil.
type stateFn func() stateFn
// ParseError signals errors while parsing the simple and flat text-based
// exchange format.
type ParseError struct {
Line int
Msg string
}
// Error implements the error interface.
func (e ParseError) Error() string {
return fmt.Sprintf("text format parsing error in line %d: %s", e.Line, e.Msg)
}
// TextParser is used to parse the simple and flat text-based exchange format. Its
// nil value is ready to use.
type TextParser struct {
metricFamiliesByName map[string]*dto.MetricFamily
buf *bufio.Reader // Where the parsed input is read through.
err error // Most recent error.
lineCount int // Tracks the line count for error messages.
currentByte byte // The most recent byte read.
currentToken bytes.Buffer // Re-used each time a token has to be gathered from multiple bytes.
currentMF *dto.MetricFamily
currentMetric *dto.Metric
currentLabelPair *dto.LabelPair
// The remaining member variables are only used for summaries/histograms.
currentLabels map[string]string // All labels including '__name__' but excluding 'quantile'/'le'
// Summary specific.
summaries map[uint64]*dto.Metric // Key is created with LabelsToSignature.
currentQuantile float64
// Histogram specific.
histograms map[uint64]*dto.Metric // Key is created with LabelsToSignature.
currentBucket float64
// These tell us if the currently processed line ends on '_count' or
// '_sum' respectively and belong to a summary/histogram, representing the sample
// count and sum of that summary/histogram.
currentIsSummaryCount, currentIsSummarySum bool
currentIsHistogramCount, currentIsHistogramSum bool
}
// TextToMetricFamilies reads 'in' as the simple and flat text-based exchange
// format and creates MetricFamily proto messages. It returns the MetricFamily
// proto messages in a map where the metric names are the keys, along with any
// error encountered.
//
// If the input contains duplicate metrics (i.e. lines with the same metric name
// and exactly the same label set), the resulting MetricFamily will contain
// duplicate Metric proto messages. Similar is true for duplicate label
// names. Checks for duplicates have to be performed separately, if required.
// Also note that neither the metrics within each MetricFamily are sorted nor
// the label pairs within each Metric. Sorting is not required for the most
// frequent use of this method, which is sample ingestion in the Prometheus
// server. However, for presentation purposes, you might want to sort the
// metrics, and in some cases, you must sort the labels, e.g. for consumption by
// the metric family injection hook of the Prometheus registry.
//
// Summaries and histograms are rather special beasts. You would probably not
// use them in the simple text format anyway. This method can deal with
// summaries and histograms if they are presented in exactly the way the
// text.Create function creates them.
//
// This method must not be called concurrently. If you want to parse different
// input concurrently, instantiate a separate Parser for each goroutine.
func (p *TextParser) TextToMetricFamilies(in io.Reader) (map[string]*dto.MetricFamily, error) {
p.reset(in)
for nextState := p.startOfLine; nextState != nil; nextState = nextState() {
// Magic happens here...
}
// Get rid of empty metric families.
for k, mf := range p.metricFamiliesByName {
if len(mf.GetMetric()) == 0 {
delete(p.metricFamiliesByName, k)
}
}
return p.metricFamiliesByName, p.err
}
func (p *TextParser) reset(in io.Reader) {
p.metricFamiliesByName = map[string]*dto.MetricFamily{}
if p.buf == nil {
p.buf = bufio.NewReader(in)
} else {
p.buf.Reset(in)
}
p.err = nil
p.lineCount = 0
if p.summaries == nil || len(p.summaries) > 0 {
p.summaries = map[uint64]*dto.Metric{}
}
if p.histograms == nil || len(p.histograms) > 0 {
p.histograms = map[uint64]*dto.Metric{}
}
p.currentQuantile = math.NaN()
p.currentBucket = math.NaN()
}
// startOfLine represents the state where the next byte read from p.buf is the
// start of a line (or whitespace leading up to it).
func (p *TextParser) startOfLine() stateFn {
p.lineCount++
if p.skipBlankTab(); p.err != nil {
// End of input reached. This is the only case where
// that is not an error but a signal that we are done.
p.err = nil
return nil
}
switch p.currentByte {
case '#':
return p.startComment
case '\n':
return p.startOfLine // Empty line, start the next one.
}
return p.readingMetricName
}
// startComment represents the state where the next byte read from p.buf is the
// start of a comment (or whitespace leading up to it).
func (p *TextParser) startComment() stateFn {
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentByte == '\n' {
return p.startOfLine
}
if p.readTokenUntilWhitespace(); p.err != nil {
return nil // Unexpected end of input.
}
// If we have hit the end of line already, there is nothing left
// to do. This is not considered a syntax error.
if p.currentByte == '\n' {
return p.startOfLine
}
keyword := p.currentToken.String()
if keyword != "HELP" && keyword != "TYPE" {
// Generic comment, ignore by fast forwarding to end of line.
for p.currentByte != '\n' {
if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil {
return nil // Unexpected end of input.
}
}
return p.startOfLine
}
// There is something. Next has to be a metric name.
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
if p.readTokenAsMetricName(); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentByte == '\n' {
// At the end of the line already.
// Again, this is not considered a syntax error.
return p.startOfLine
}
if !isBlankOrTab(p.currentByte) {
p.parseError("invalid metric name in comment")
return nil
}
p.setOrCreateCurrentMF()
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentByte == '\n' {
// At the end of the line already.
// Again, this is not considered a syntax error.
return p.startOfLine
}
switch keyword {
case "HELP":
return p.readingHelp
case "TYPE":
return p.readingType
}
panic(fmt.Sprintf("code error: unexpected keyword %q", keyword))
}
// readingMetricName represents the state where the last byte read (now in
// p.currentByte) is the first byte of a metric name.
func (p *TextParser) readingMetricName() stateFn {
if p.readTokenAsMetricName(); p.err != nil {
return nil
}
if p.currentToken.Len() == 0 {
p.parseError("invalid metric name")
return nil
}
p.setOrCreateCurrentMF()
// Now is the time to fix the type if it hasn't happened yet.
if p.currentMF.Type == nil {
p.currentMF.Type = dto.MetricType_UNTYPED.Enum()
}
p.currentMetric = &dto.Metric{}
// Do not append the newly created currentMetric to
// currentMF.Metric right now. First wait if this is a summary,
// and the metric exists already, which we can only know after
// having read all the labels.
if p.skipBlankTabIfCurrentBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
return p.readingLabels
}
// readingLabels represents the state where the last byte read (now in
// p.currentByte) is either the first byte of the label set (i.e. a '{'), or the
// first byte of the value (otherwise).
func (p *TextParser) readingLabels() stateFn {
// Summaries/histograms are special. We have to reset the
// currentLabels map, currentQuantile and currentBucket before starting to
// read labels.
if p.currentMF.GetType() == dto.MetricType_SUMMARY || p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
p.currentLabels = map[string]string{}
p.currentLabels[string(model.MetricNameLabel)] = p.currentMF.GetName()
p.currentQuantile = math.NaN()
p.currentBucket = math.NaN()
}
if p.currentByte != '{' {
return p.readingValue
}
return p.startLabelName
}
// startLabelName represents the state where the next byte read from p.buf is
// the start of a label name (or whitespace leading up to it).
func (p *TextParser) startLabelName() stateFn {
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentByte == '}' {
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
return p.readingValue
}
if p.readTokenAsLabelName(); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentToken.Len() == 0 {
p.parseError(fmt.Sprintf("invalid label name for metric %q", p.currentMF.GetName()))
return nil
}
p.currentLabelPair = &dto.LabelPair{Name: proto.String(p.currentToken.String())}
if p.currentLabelPair.GetName() == string(model.MetricNameLabel) {
p.parseError(fmt.Sprintf("label name %q is reserved", model.MetricNameLabel))
return nil
}
// Special summary/histogram treatment. Don't add 'quantile' and 'le'
// labels to 'real' labels.
if !(p.currentMF.GetType() == dto.MetricType_SUMMARY && p.currentLabelPair.GetName() == model.QuantileLabel) &&
!(p.currentMF.GetType() == dto.MetricType_HISTOGRAM && p.currentLabelPair.GetName() == model.BucketLabel) {
p.currentMetric.Label = append(p.currentMetric.Label, p.currentLabelPair)
}
if p.skipBlankTabIfCurrentBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentByte != '=' {
p.parseError(fmt.Sprintf("expected '=' after label name, found %q", p.currentByte))
return nil
}
return p.startLabelValue
}
// startLabelValue represents the state where the next byte read from p.buf is
// the start of a (quoted) label value (or whitespace leading up to it).
func (p *TextParser) startLabelValue() stateFn {
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentByte != '"' {
p.parseError(fmt.Sprintf("expected '\"' at start of label value, found %q", p.currentByte))
return nil
}
if p.readTokenAsLabelValue(); p.err != nil {
return nil
}
p.currentLabelPair.Value = proto.String(p.currentToken.String())
// Special treatment of summaries:
// - Quantile labels are special, will result in dto.Quantile later.
// - Other labels have to be added to currentLabels for signature calculation.
if p.currentMF.GetType() == dto.MetricType_SUMMARY {
if p.currentLabelPair.GetName() == model.QuantileLabel {
if p.currentQuantile, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
// Create a more helpful error message.
p.parseError(fmt.Sprintf("expected float as value for 'quantile' label, got %q", p.currentLabelPair.GetValue()))
return nil
}
} else {
p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue()
}
}
// Similar special treatment of histograms.
if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
if p.currentLabelPair.GetName() == model.BucketLabel {
if p.currentBucket, p.err = strconv.ParseFloat(p.currentLabelPair.GetValue(), 64); p.err != nil {
// Create a more helpful error message.
p.parseError(fmt.Sprintf("expected float as value for 'le' label, got %q", p.currentLabelPair.GetValue()))
return nil
}
} else {
p.currentLabels[p.currentLabelPair.GetName()] = p.currentLabelPair.GetValue()
}
}
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
switch p.currentByte {
case ',':
return p.startLabelName
case '}':
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
return p.readingValue
default:
p.parseError(fmt.Sprintf("unexpected end of label value %q", p.currentLabelPair.Value))
return nil
}
}
// readingValue represents the state where the last byte read (now in
// p.currentByte) is the first byte of the sample value (i.e. a float).
func (p *TextParser) readingValue() stateFn {
// When we are here, we have read all the labels, so for the
// special case of a summary/histogram, we can finally find out
// if the metric already exists.
if p.currentMF.GetType() == dto.MetricType_SUMMARY {
signature := model.LabelsToSignature(p.currentLabels)
if summary := p.summaries[signature]; summary != nil {
p.currentMetric = summary
} else {
p.summaries[signature] = p.currentMetric
p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
}
} else if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
signature := model.LabelsToSignature(p.currentLabels)
if histogram := p.histograms[signature]; histogram != nil {
p.currentMetric = histogram
} else {
p.histograms[signature] = p.currentMetric
p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
}
} else {
p.currentMF.Metric = append(p.currentMF.Metric, p.currentMetric)
}
if p.readTokenUntilWhitespace(); p.err != nil {
return nil // Unexpected end of input.
}
value, err := strconv.ParseFloat(p.currentToken.String(), 64)
if err != nil {
// Create a more helpful error message.
p.parseError(fmt.Sprintf("expected float as value, got %q", p.currentToken.String()))
return nil
}
switch p.currentMF.GetType() {
case dto.MetricType_COUNTER:
p.currentMetric.Counter = &dto.Counter{Value: proto.Float64(value)}
case dto.MetricType_GAUGE:
p.currentMetric.Gauge = &dto.Gauge{Value: proto.Float64(value)}
case dto.MetricType_UNTYPED:
p.currentMetric.Untyped = &dto.Untyped{Value: proto.Float64(value)}
case dto.MetricType_SUMMARY:
// *sigh*
if p.currentMetric.Summary == nil {
p.currentMetric.Summary = &dto.Summary{}
}
switch {
case p.currentIsSummaryCount:
p.currentMetric.Summary.SampleCount = proto.Uint64(uint64(value))
case p.currentIsSummarySum:
p.currentMetric.Summary.SampleSum = proto.Float64(value)
case !math.IsNaN(p.currentQuantile):
p.currentMetric.Summary.Quantile = append(
p.currentMetric.Summary.Quantile,
&dto.Quantile{
Quantile: proto.Float64(p.currentQuantile),
Value: proto.Float64(value),
},
)
}
case dto.MetricType_HISTOGRAM:
// *sigh*
if p.currentMetric.Histogram == nil {
p.currentMetric.Histogram = &dto.Histogram{}
}
switch {
case p.currentIsHistogramCount:
p.currentMetric.Histogram.SampleCount = proto.Uint64(uint64(value))
case p.currentIsHistogramSum:
p.currentMetric.Histogram.SampleSum = proto.Float64(value)
case !math.IsNaN(p.currentBucket):
p.currentMetric.Histogram.Bucket = append(
p.currentMetric.Histogram.Bucket,
&dto.Bucket{
UpperBound: proto.Float64(p.currentBucket),
CumulativeCount: proto.Uint64(uint64(value)),
},
)
}
default:
p.err = fmt.Errorf("unexpected type for metric name %q", p.currentMF.GetName())
}
if p.currentByte == '\n' {
return p.startOfLine
}
return p.startTimestamp
}
// startTimestamp represents the state where the next byte read from p.buf is
// the start of the timestamp (or whitespace leading up to it).
func (p *TextParser) startTimestamp() stateFn {
if p.skipBlankTab(); p.err != nil {
return nil // Unexpected end of input.
}
if p.readTokenUntilWhitespace(); p.err != nil {
return nil // Unexpected end of input.
}
timestamp, err := strconv.ParseInt(p.currentToken.String(), 10, 64)
if err != nil {
// Create a more helpful error message.
p.parseError(fmt.Sprintf("expected integer as timestamp, got %q", p.currentToken.String()))
return nil
}
p.currentMetric.TimestampMs = proto.Int64(timestamp)
if p.readTokenUntilNewline(false); p.err != nil {
return nil // Unexpected end of input.
}
if p.currentToken.Len() > 0 {
p.parseError(fmt.Sprintf("spurious string after timestamp: %q", p.currentToken.String()))
return nil
}
return p.startOfLine
}
// readingHelp represents the state where the last byte read (now in
// p.currentByte) is the first byte of the docstring after 'HELP'.
func (p *TextParser) readingHelp() stateFn {
if p.currentMF.Help != nil {
p.parseError(fmt.Sprintf("second HELP line for metric name %q", p.currentMF.GetName()))
return nil
}
// Rest of line is the docstring.
if p.readTokenUntilNewline(true); p.err != nil {
return nil // Unexpected end of input.
}
p.currentMF.Help = proto.String(p.currentToken.String())
return p.startOfLine
}
// readingType represents the state where the last byte read (now in
// p.currentByte) is the first byte of the type hint after 'HELP'.
func (p *TextParser) readingType() stateFn {
if p.currentMF.Type != nil {
p.parseError(fmt.Sprintf("second TYPE line for metric name %q, or TYPE reported after samples", p.currentMF.GetName()))
return nil
}
// Rest of line is the type.
if p.readTokenUntilNewline(false); p.err != nil {
return nil // Unexpected end of input.
}
metricType, ok := dto.MetricType_value[strings.ToUpper(p.currentToken.String())]
if !ok {
p.parseError(fmt.Sprintf("unknown metric type %q", p.currentToken.String()))
return nil
}
p.currentMF.Type = dto.MetricType(metricType).Enum()
return p.startOfLine
}
// parseError sets p.err to a ParseError at the current line with the given
// message.
func (p *TextParser) parseError(msg string) {
p.err = ParseError{
Line: p.lineCount,
Msg: msg,
}
}
// skipBlankTab reads (and discards) bytes from p.buf until it encounters a byte
// that is neither ' ' nor '\t'. That byte is left in p.currentByte.
func (p *TextParser) skipBlankTab() {
for {
if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil || !isBlankOrTab(p.currentByte) {
return
}
}
}
// skipBlankTabIfCurrentBlankTab works exactly as skipBlankTab but doesn't do
// anything if p.currentByte is neither ' ' nor '\t'.
func (p *TextParser) skipBlankTabIfCurrentBlankTab() {
if isBlankOrTab(p.currentByte) {
p.skipBlankTab()
}
}
// readTokenUntilWhitespace copies bytes from p.buf into p.currentToken. The
// first byte considered is the byte already read (now in p.currentByte). The
// first whitespace byte encountered is still copied into p.currentByte, but not
// into p.currentToken.
func (p *TextParser) readTokenUntilWhitespace() {
p.currentToken.Reset()
for p.err == nil && !isBlankOrTab(p.currentByte) && p.currentByte != '\n' {
p.currentToken.WriteByte(p.currentByte)
p.currentByte, p.err = p.buf.ReadByte()
}
}
// readTokenUntilNewline copies bytes from p.buf into p.currentToken. The first
// byte considered is the byte already read (now in p.currentByte). The first
// newline byte encountered is still copied into p.currentByte, but not into
// p.currentToken. If recognizeEscapeSequence is true, two escape sequences are
// recognized: '\\' tranlates into '\', and '\n' into a line-feed character. All
// other escape sequences are invalid and cause an error.
func (p *TextParser) readTokenUntilNewline(recognizeEscapeSequence bool) {
p.currentToken.Reset()
escaped := false
for p.err == nil {
if recognizeEscapeSequence && escaped {
switch p.currentByte {
case '\\':
p.currentToken.WriteByte(p.currentByte)
case 'n':
p.currentToken.WriteByte('\n')
default:
p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte))
return
}
escaped = false
} else {
switch p.currentByte {
case '\n':
return
case '\\':
escaped = true
default:
p.currentToken.WriteByte(p.currentByte)
}
}
p.currentByte, p.err = p.buf.ReadByte()
}
}
// readTokenAsMetricName copies a metric name from p.buf into p.currentToken.
// The first byte considered is the byte already read (now in p.currentByte).
// The first byte not part of a metric name is still copied into p.currentByte,
// but not into p.currentToken.
func (p *TextParser) readTokenAsMetricName() {
p.currentToken.Reset()
if !isValidMetricNameStart(p.currentByte) {
return
}
for {
p.currentToken.WriteByte(p.currentByte)
p.currentByte, p.err = p.buf.ReadByte()
if p.err != nil || !isValidMetricNameContinuation(p.currentByte) {
return
}
}
}
// readTokenAsLabelName copies a label name from p.buf into p.currentToken.
// The first byte considered is the byte already read (now in p.currentByte).
// The first byte not part of a label name is still copied into p.currentByte,
// but not into p.currentToken.
func (p *TextParser) readTokenAsLabelName() {
p.currentToken.Reset()
if !isValidLabelNameStart(p.currentByte) {
return
}
for {
p.currentToken.WriteByte(p.currentByte)
p.currentByte, p.err = p.buf.ReadByte()
if p.err != nil || !isValidLabelNameContinuation(p.currentByte) {
return
}
}
}
// readTokenAsLabelValue copies a label value from p.buf into p.currentToken.
// In contrast to the other 'readTokenAs...' functions, which start with the
// last read byte in p.currentByte, this method ignores p.currentByte and starts
// with reading a new byte from p.buf. The first byte not part of a label value
// is still copied into p.currentByte, but not into p.currentToken.
func (p *TextParser) readTokenAsLabelValue() {
p.currentToken.Reset()
escaped := false
for {
if p.currentByte, p.err = p.buf.ReadByte(); p.err != nil {
return
}
if escaped {
switch p.currentByte {
case '"', '\\':
p.currentToken.WriteByte(p.currentByte)
case 'n':
p.currentToken.WriteByte('\n')
default:
p.parseError(fmt.Sprintf("invalid escape sequence '\\%c'", p.currentByte))
return
}
escaped = false
continue
}
switch p.currentByte {
case '"':
return
case '\n':
p.parseError(fmt.Sprintf("label value %q contains unescaped new-line", p.currentToken.String()))
return
case '\\':
escaped = true
default:
p.currentToken.WriteByte(p.currentByte)
}
}
}
func (p *TextParser) setOrCreateCurrentMF() {
p.currentIsSummaryCount = false
p.currentIsSummarySum = false
p.currentIsHistogramCount = false
p.currentIsHistogramSum = false
name := p.currentToken.String()
if p.currentMF = p.metricFamiliesByName[name]; p.currentMF != nil {
return
}
// Try out if this is a _sum or _count for a summary/histogram.
summaryName := summaryMetricName(name)
if p.currentMF = p.metricFamiliesByName[summaryName]; p.currentMF != nil {
if p.currentMF.GetType() == dto.MetricType_SUMMARY {
if isCount(name) {
p.currentIsSummaryCount = true
}
if isSum(name) {
p.currentIsSummarySum = true
}
return
}
}
histogramName := histogramMetricName(name)
if p.currentMF = p.metricFamiliesByName[histogramName]; p.currentMF != nil {
if p.currentMF.GetType() == dto.MetricType_HISTOGRAM {
if isCount(name) {
p.currentIsHistogramCount = true
}
if isSum(name) {
p.currentIsHistogramSum = true
}
return
}
}
p.currentMF = &dto.MetricFamily{Name: proto.String(name)}
p.metricFamiliesByName[name] = p.currentMF
}
func isValidLabelNameStart(b byte) bool {
return (b >= 'a' && b <= 'z') || (b >= 'A' && b <= 'Z') || b == '_'
}
func isValidLabelNameContinuation(b byte) bool {
return isValidLabelNameStart(b) || (b >= '0' && b <= '9')
}
func isValidMetricNameStart(b byte) bool {
return isValidLabelNameStart(b) || b == ':'
}
func isValidMetricNameContinuation(b byte) bool {
return isValidLabelNameContinuation(b) || b == ':'
}
func isBlankOrTab(b byte) bool {
return b == ' ' || b == '\t'
}
func isCount(name string) bool {
return len(name) > 6 && name[len(name)-6:] == "_count"
}
func isSum(name string) bool {
return len(name) > 4 && name[len(name)-4:] == "_sum"
}
func isBucket(name string) bool {
return len(name) > 7 && name[len(name)-7:] == "_bucket"
}
func summaryMetricName(name string) string {
switch {
case isCount(name):
return name[:len(name)-6]
case isSum(name):
return name[:len(name)-4]
default:
return name
}
}
func histogramMetricName(name string) string {
switch {
case isCount(name):
return name[:len(name)-6]
case isSum(name):
return name[:len(name)-4]
case isBucket(name):
return name[:len(name)-7]
default:
return name
}
}

586
Godeps/_workspace/src/github.com/prometheus/common/expfmt/text_parse_test.go generated vendored Normal file
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@ -0,0 +1,586 @@
// Copyright 2014 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package expfmt
import (
"math"
"strings"
"testing"
"github.com/golang/protobuf/proto"
dto "github.com/prometheus/client_model/go"
)
func testTextParse(t testing.TB) {
var scenarios = []struct {
in string
out []*dto.MetricFamily
}{
// 0: Empty lines as input.
{
in: `
`,
out: []*dto.MetricFamily{},
},
// 1: Minimal case.
{
in: `
minimal_metric 1.234
another_metric -3e3 103948
# Even that:
no_labels{} 3
# HELP line for non-existing metric will be ignored.
`,
out: []*dto.MetricFamily{
&dto.MetricFamily{
Name: proto.String("minimal_metric"),
Type: dto.MetricType_UNTYPED.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(1.234),
},
},
},
},
&dto.MetricFamily{
Name: proto.String("another_metric"),
Type: dto.MetricType_UNTYPED.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(-3e3),
},
TimestampMs: proto.Int64(103948),
},
},
},
&dto.MetricFamily{
Name: proto.String("no_labels"),
Type: dto.MetricType_UNTYPED.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(3),
},
},
},
},
},
},
// 2: Counters & gauges, docstrings, various whitespace, escape sequences.
{
in: `
# A normal comment.
#
# TYPE name counter
name{labelname="val1",basename="basevalue"} NaN
name {labelname="val2",basename="base\"v\\al\nue"} 0.23 1234567890
# HELP name two-line\n doc str\\ing
# HELP name2 doc str"ing 2
# TYPE name2 gauge
name2{labelname="val2" ,basename = "basevalue2" } +Inf 54321
name2{ labelname = "val1" , }-Inf
`,
out: []*dto.MetricFamily{
&dto.MetricFamily{
Name: proto.String("name"),
Help: proto.String("two-line\n doc str\\ing"),
Type: dto.MetricType_COUNTER.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("labelname"),
Value: proto.String("val1"),
},
&dto.LabelPair{
Name: proto.String("basename"),
Value: proto.String("basevalue"),
},
},
Counter: &dto.Counter{
Value: proto.Float64(math.NaN()),
},
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("labelname"),
Value: proto.String("val2"),
},
&dto.LabelPair{
Name: proto.String("basename"),
Value: proto.String("base\"v\\al\nue"),
},
},
Counter: &dto.Counter{
Value: proto.Float64(.23),
},
TimestampMs: proto.Int64(1234567890),
},
},
},
&dto.MetricFamily{
Name: proto.String("name2"),
Help: proto.String("doc str\"ing 2"),
Type: dto.MetricType_GAUGE.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("labelname"),
Value: proto.String("val2"),
},
&dto.LabelPair{
Name: proto.String("basename"),
Value: proto.String("basevalue2"),
},
},
Gauge: &dto.Gauge{
Value: proto.Float64(math.Inf(+1)),
},
TimestampMs: proto.Int64(54321),
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("labelname"),
Value: proto.String("val1"),
},
},
Gauge: &dto.Gauge{
Value: proto.Float64(math.Inf(-1)),
},
},
},
},
},
},
// 3: The evil summary, mixed with other types and funny comments.
{
in: `
# TYPE my_summary summary
my_summary{n1="val1",quantile="0.5"} 110
decoy -1 -2
my_summary{n1="val1",quantile="0.9"} 140 1
my_summary_count{n1="val1"} 42
# Latest timestamp wins in case of a summary.
my_summary_sum{n1="val1"} 4711 2
fake_sum{n1="val1"} 2001
# TYPE another_summary summary
another_summary_count{n2="val2",n1="val1"} 20
my_summary_count{n2="val2",n1="val1"} 5 5
another_summary{n1="val1",n2="val2",quantile=".3"} -1.2
my_summary_sum{n1="val2"} 08 15
my_summary{n1="val3", quantile="0.2"} 4711
my_summary{n1="val1",n2="val2",quantile="-12.34",} NaN
# some
# funny comments
# HELP
# HELP
# HELP my_summary
# HELP my_summary
`,
out: []*dto.MetricFamily{
&dto.MetricFamily{
Name: proto.String("fake_sum"),
Type: dto.MetricType_UNTYPED.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("n1"),
Value: proto.String("val1"),
},
},
Untyped: &dto.Untyped{
Value: proto.Float64(2001),
},
},
},
},
&dto.MetricFamily{
Name: proto.String("decoy"),
Type: dto.MetricType_UNTYPED.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Untyped: &dto.Untyped{
Value: proto.Float64(-1),
},
TimestampMs: proto.Int64(-2),
},
},
},
&dto.MetricFamily{
Name: proto.String("my_summary"),
Type: dto.MetricType_SUMMARY.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("n1"),
Value: proto.String("val1"),
},
},
Summary: &dto.Summary{
SampleCount: proto.Uint64(42),
SampleSum: proto.Float64(4711),
Quantile: []*dto.Quantile{
&dto.Quantile{
Quantile: proto.Float64(0.5),
Value: proto.Float64(110),
},
&dto.Quantile{
Quantile: proto.Float64(0.9),
Value: proto.Float64(140),
},
},
},
TimestampMs: proto.Int64(2),
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("n2"),
Value: proto.String("val2"),
},
&dto.LabelPair{
Name: proto.String("n1"),
Value: proto.String("val1"),
},
},
Summary: &dto.Summary{
SampleCount: proto.Uint64(5),
Quantile: []*dto.Quantile{
&dto.Quantile{
Quantile: proto.Float64(-12.34),
Value: proto.Float64(math.NaN()),
},
},
},
TimestampMs: proto.Int64(5),
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("n1"),
Value: proto.String("val2"),
},
},
Summary: &dto.Summary{
SampleSum: proto.Float64(8),
},
TimestampMs: proto.Int64(15),
},
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("n1"),
Value: proto.String("val3"),
},
},
Summary: &dto.Summary{
Quantile: []*dto.Quantile{
&dto.Quantile{
Quantile: proto.Float64(0.2),
Value: proto.Float64(4711),
},
},
},
},
},
},
&dto.MetricFamily{
Name: proto.String("another_summary"),
Type: dto.MetricType_SUMMARY.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Label: []*dto.LabelPair{
&dto.LabelPair{
Name: proto.String("n2"),
Value: proto.String("val2"),
},
&dto.LabelPair{
Name: proto.String("n1"),
Value: proto.String("val1"),
},
},
Summary: &dto.Summary{
SampleCount: proto.Uint64(20),
Quantile: []*dto.Quantile{
&dto.Quantile{
Quantile: proto.Float64(0.3),
Value: proto.Float64(-1.2),
},
},
},
},
},
},
},
},
// 4: The histogram.
{
in: `
# HELP request_duration_microseconds The response latency.
# TYPE request_duration_microseconds histogram
request_duration_microseconds_bucket{le="100"} 123
request_duration_microseconds_bucket{le="120"} 412
request_duration_microseconds_bucket{le="144"} 592
request_duration_microseconds_bucket{le="172.8"} 1524
request_duration_microseconds_bucket{le="+Inf"} 2693
request_duration_microseconds_sum 1.7560473e+06
request_duration_microseconds_count 2693
`,
out: []*dto.MetricFamily{
{
Name: proto.String("request_duration_microseconds"),
Help: proto.String("The response latency."),
Type: dto.MetricType_HISTOGRAM.Enum(),
Metric: []*dto.Metric{
&dto.Metric{
Histogram: &dto.Histogram{
SampleCount: proto.Uint64(2693),
SampleSum: proto.Float64(1756047.3),
Bucket: []*dto.Bucket{
&dto.Bucket{
UpperBound: proto.Float64(100),
CumulativeCount: proto.Uint64(123),
},
&dto.Bucket{
UpperBound: proto.Float64(120),
CumulativeCount: proto.Uint64(412),
},
&dto.Bucket{
UpperBound: proto.Float64(144),
CumulativeCount: proto.Uint64(592),
},
&dto.Bucket{
UpperBound: proto.Float64(172.8),
CumulativeCount: proto.Uint64(1524),
},
&dto.Bucket{
UpperBound: proto.Float64(math.Inf(+1)),
CumulativeCount: proto.Uint64(2693),
},
},
},
},
},
},
},
},
}
for i, scenario := range scenarios {
out, err := parser.TextToMetricFamilies(strings.NewReader(scenario.in))
if err != nil {
t.Errorf("%d. error: %s", i, err)
continue
}
if expected, got := len(scenario.out), len(out); expected != got {
t.Errorf(
"%d. expected %d MetricFamilies, got %d",
i, expected, got,
)
}
for _, expected := range scenario.out {
got, ok := out[expected.GetName()]
if !ok {
t.Errorf(
"%d. expected MetricFamily %q, found none",
i, expected.GetName(),
)
continue
}
if expected.String() != got.String() {
t.Errorf(
"%d. expected MetricFamily %s, got %s",
i, expected, got,
)
}
}
}
}
func TestTextParse(t *testing.T) {
testTextParse(t)
}
func BenchmarkTextParse(b *testing.B) {
for i := 0; i < b.N; i++ {
testTextParse(b)
}
}
func testTextParseError(t testing.TB) {
var scenarios = []struct {
in string
err string
}{
// 0: No new-line at end of input.
{
in: `bla 3.14`,
err: "EOF",
},
// 1: Invalid escape sequence in label value.
{
in: `metric{label="\t"} 3.14`,
err: "text format parsing error in line 1: invalid escape sequence",
},
// 2: Newline in label value.
{
in: `
metric{label="new
line"} 3.14
`,
err: `text format parsing error in line 2: label value "new" contains unescaped new-line`,
},
// 3:
{
in: `metric{@="bla"} 3.14`,
err: "text format parsing error in line 1: invalid label name for metric",
},
// 4:
{
in: `metric{__name__="bla"} 3.14`,
err: `text format parsing error in line 1: label name "__name__" is reserved`,
},
// 5:
{
in: `metric{label+="bla"} 3.14`,
err: "text format parsing error in line 1: expected '=' after label name",
},
// 6:
{
in: `metric{label=bla} 3.14`,
err: "text format parsing error in line 1: expected '\"' at start of label value",
},
// 7:
{
in: `
# TYPE metric summary
metric{quantile="bla"} 3.14
`,
err: "text format parsing error in line 3: expected float as value for 'quantile' label",
},
// 8:
{
in: `metric{label="bla"+} 3.14`,
err: "text format parsing error in line 1: unexpected end of label value",
},
// 9:
{
in: `metric{label="bla"} 3.14 2.72
`,
err: "text format parsing error in line 1: expected integer as timestamp",
},
// 10:
{
in: `metric{label="bla"} 3.14 2 3
`,
err: "text format parsing error in line 1: spurious string after timestamp",
},
// 11:
{
in: `metric{label="bla"} blubb
`,
err: "text format parsing error in line 1: expected float as value",
},
// 12:
{
in: `
# HELP metric one
# HELP metric two
`,
err: "text format parsing error in line 3: second HELP line for metric name",
},
// 13:
{
in: `
# TYPE metric counter
# TYPE metric untyped
`,
err: `text format parsing error in line 3: second TYPE line for metric name "metric", or TYPE reported after samples`,
},
// 14:
{
in: `
metric 4.12
# TYPE metric counter
`,
err: `text format parsing error in line 3: second TYPE line for metric name "metric", or TYPE reported after samples`,
},
// 14:
{
in: `
# TYPE metric bla
`,
err: "text format parsing error in line 2: unknown metric type",
},
// 15:
{
in: `
# TYPE met-ric
`,
err: "text format parsing error in line 2: invalid metric name in comment",
},
// 16:
{
in: `@invalidmetric{label="bla"} 3.14 2`,
err: "text format parsing error in line 1: invalid metric name",
},
// 17:
{
in: `{label="bla"} 3.14 2`,
err: "text format parsing error in line 1: invalid metric name",
},
// 18:
{
in: `
# TYPE metric histogram
metric_bucket{le="bla"} 3.14
`,
err: "text format parsing error in line 3: expected float as value for 'le' label",
},
}
for i, scenario := range scenarios {
_, err := parser.TextToMetricFamilies(strings.NewReader(scenario.in))
if err == nil {
t.Errorf("%d. expected error, got nil", i)
continue
}
if expected, got := scenario.err, err.Error(); strings.Index(got, expected) != 0 {
t.Errorf(
"%d. expected error starting with %q, got %q",
i, expected, got,
)
}
}
}
func TestTextParseError(t *testing.T) {
testTextParseError(t)
}
func BenchmarkParseError(b *testing.B) {
for i := 0; i < b.N; i++ {
testTextParseError(b)
}
}