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Merge v1.2.1-master

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Signed-off-by: Emile Vauge <emile@vauge.com>
This commit is contained in:
Emile Vauge 2017-04-11 17:10:46 +02:00
parent a590155b0b
commit aeb17182b4
No known key found for this signature in database
GPG key ID: D808B4C167352E59
396 changed files with 27271 additions and 9969 deletions
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108
vendor/github.com/prometheus/common/model/signature.go generated vendored
View file

@ -14,11 +14,7 @@
package model
import (
"bytes"
"hash"
"hash/fnv"
"sort"
"sync"
)
// SeparatorByte is a byte that cannot occur in valid UTF-8 sequences and is
@ -28,30 +24,9 @@ const SeparatorByte byte = 255
var (
// cache the signature of an empty label set.
emptyLabelSignature = fnv.New64a().Sum64()
hashAndBufPool sync.Pool
emptyLabelSignature = hashNew()
)
type hashAndBuf struct {
h hash.Hash64
b bytes.Buffer
}
func getHashAndBuf() *hashAndBuf {
hb := hashAndBufPool.Get()
if hb == nil {
return &hashAndBuf{h: fnv.New64a()}
}
return hb.(*hashAndBuf)
}
func putHashAndBuf(hb *hashAndBuf) {
hb.h.Reset()
hb.b.Reset()
hashAndBufPool.Put(hb)
}
// LabelsToSignature returns a quasi-unique signature (i.e., fingerprint) for a
// given label set. (Collisions are possible but unlikely if the number of label
// sets the function is applied to is small.)
@ -66,18 +41,14 @@ func LabelsToSignature(labels map[string]string) uint64 {
}
sort.Strings(labelNames)
hb := getHashAndBuf()
defer putHashAndBuf(hb)
sum := hashNew()
for _, labelName := range labelNames {
hb.b.WriteString(labelName)
hb.b.WriteByte(SeparatorByte)
hb.b.WriteString(labels[labelName])
hb.b.WriteByte(SeparatorByte)
hb.h.Write(hb.b.Bytes())
hb.b.Reset()
sum = hashAdd(sum, labelName)
sum = hashAddByte(sum, SeparatorByte)
sum = hashAdd(sum, labels[labelName])
sum = hashAddByte(sum, SeparatorByte)
}
return hb.h.Sum64()
return sum
}
// labelSetToFingerprint works exactly as LabelsToSignature but takes a LabelSet as
@ -93,18 +64,14 @@ func labelSetToFingerprint(ls LabelSet) Fingerprint {
}
sort.Sort(labelNames)
hb := getHashAndBuf()
defer putHashAndBuf(hb)
sum := hashNew()
for _, labelName := range labelNames {
hb.b.WriteString(string(labelName))
hb.b.WriteByte(SeparatorByte)
hb.b.WriteString(string(ls[labelName]))
hb.b.WriteByte(SeparatorByte)
hb.h.Write(hb.b.Bytes())
hb.b.Reset()
sum = hashAdd(sum, string(labelName))
sum = hashAddByte(sum, SeparatorByte)
sum = hashAdd(sum, string(ls[labelName]))
sum = hashAddByte(sum, SeparatorByte)
}
return Fingerprint(hb.h.Sum64())
return Fingerprint(sum)
}
// labelSetToFastFingerprint works similar to labelSetToFingerprint but uses a
@ -116,17 +83,12 @@ func labelSetToFastFingerprint(ls LabelSet) Fingerprint {
}
var result uint64
hb := getHashAndBuf()
defer putHashAndBuf(hb)
for labelName, labelValue := range ls {
hb.b.WriteString(string(labelName))
hb.b.WriteByte(SeparatorByte)
hb.b.WriteString(string(labelValue))
hb.h.Write(hb.b.Bytes())
result ^= hb.h.Sum64()
hb.h.Reset()
hb.b.Reset()
sum := hashNew()
sum = hashAdd(sum, string(labelName))
sum = hashAddByte(sum, SeparatorByte)
sum = hashAdd(sum, string(labelValue))
result ^= sum
}
return Fingerprint(result)
}
@ -136,24 +98,20 @@ func labelSetToFastFingerprint(ls LabelSet) Fingerprint {
// specified LabelNames into the signature calculation. The labels passed in
// will be sorted by this function.
func SignatureForLabels(m Metric, labels ...LabelName) uint64 {
if len(m) == 0 || len(labels) == 0 {
if len(labels) == 0 {
return emptyLabelSignature
}
sort.Sort(LabelNames(labels))
hb := getHashAndBuf()
defer putHashAndBuf(hb)
sum := hashNew()
for _, label := range labels {
hb.b.WriteString(string(label))
hb.b.WriteByte(SeparatorByte)
hb.b.WriteString(string(m[label]))
hb.b.WriteByte(SeparatorByte)
hb.h.Write(hb.b.Bytes())
hb.b.Reset()
sum = hashAdd(sum, string(label))
sum = hashAddByte(sum, SeparatorByte)
sum = hashAdd(sum, string(m[label]))
sum = hashAddByte(sum, SeparatorByte)
}
return hb.h.Sum64()
return sum
}
// SignatureWithoutLabels works like LabelsToSignature but takes a Metric as
@ -175,16 +133,12 @@ func SignatureWithoutLabels(m Metric, labels map[LabelName]struct{}) uint64 {
}
sort.Sort(labelNames)
hb := getHashAndBuf()
defer putHashAndBuf(hb)
sum := hashNew()
for _, labelName := range labelNames {
hb.b.WriteString(string(labelName))
hb.b.WriteByte(SeparatorByte)
hb.b.WriteString(string(m[labelName]))
hb.b.WriteByte(SeparatorByte)
hb.h.Write(hb.b.Bytes())
hb.b.Reset()
sum = hashAdd(sum, string(labelName))
sum = hashAddByte(sum, SeparatorByte)
sum = hashAdd(sum, string(m[labelName]))
sum = hashAddByte(sum, SeparatorByte)
}
return hb.h.Sum64()
return sum
}