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Split model values into smaller files by category
Signed-off-by: Jeanette Tan <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,101 @@ | ||
| // Copyright 2013 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. | ||
|
|
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| package model | ||
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|
||
| import ( | ||
| "encoding/json" | ||
| "fmt" | ||
| "math" | ||
| "strconv" | ||
| ) | ||
|
|
||
| var ( | ||
| // ZeroSamplePair is the pseudo zero-value of SamplePair used to signal a | ||
| // non-existing sample pair. It is a SamplePair with timestamp Earliest and | ||
| // value 0.0. Note that the natural zero value of SamplePair has a timestamp | ||
| // of 0, which is possible to appear in a real SamplePair and thus not | ||
| // suitable to signal a non-existing SamplePair. | ||
| ZeroSamplePair = SamplePair{Timestamp: Earliest} | ||
| ) | ||
|
|
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| // A SampleValue is a representation of a value for a given sample at a given | ||
| // time. | ||
| type SampleValue float64 | ||
|
|
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| // MarshalJSON implements json.Marshaler. | ||
| func (v SampleValue) MarshalJSON() ([]byte, error) { | ||
| return json.Marshal(v.String()) | ||
| } | ||
|
|
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| // UnmarshalJSON implements json.Unmarshaler. | ||
| func (v *SampleValue) UnmarshalJSON(b []byte) error { | ||
| if len(b) < 2 || b[0] != '"' || b[len(b)-1] != '"' { | ||
| return fmt.Errorf("sample value must be a quoted string") | ||
| } | ||
| f, err := strconv.ParseFloat(string(b[1:len(b)-1]), 64) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| *v = SampleValue(f) | ||
| return nil | ||
| } | ||
|
|
||
| // Equal returns true if the value of v and o is equal or if both are NaN. Note | ||
| // that v==o is false if both are NaN. If you want the conventional float | ||
| // behavior, use == to compare two SampleValues. | ||
| func (v SampleValue) Equal(o SampleValue) bool { | ||
| if v == o { | ||
| return true | ||
| } | ||
| return math.IsNaN(float64(v)) && math.IsNaN(float64(o)) | ||
| } | ||
|
|
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| func (v SampleValue) String() string { | ||
| return strconv.FormatFloat(float64(v), 'f', -1, 64) | ||
| } | ||
|
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| // SamplePair pairs a SampleValue with a Timestamp. | ||
| type SamplePair struct { | ||
| Timestamp Time | ||
| Value SampleValue | ||
| } | ||
|
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| // MarshalJSON implements json.Marshaler. | ||
| func (s SamplePair) MarshalJSON() ([]byte, error) { | ||
| t, err := json.Marshal(s.Timestamp) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| v, err := json.Marshal(s.Value) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| return []byte(fmt.Sprintf("[%s,%s]", t, v)), nil | ||
| } | ||
|
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| // UnmarshalJSON implements json.Unmarshaler. | ||
| func (s *SamplePair) UnmarshalJSON(b []byte) error { | ||
| v := [...]json.Unmarshaler{&s.Timestamp, &s.Value} | ||
| return json.Unmarshal(b, &v) | ||
| } | ||
|
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| // Equal returns true if this SamplePair and o have equal Values and equal | ||
| // Timestamps. The semantics of Value equality is defined by SampleValue.Equal. | ||
| func (s *SamplePair) Equal(o *SamplePair) bool { | ||
| return s == o || (s.Value.Equal(o.Value) && s.Timestamp.Equal(o.Timestamp)) | ||
| } | ||
|
|
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| func (s SamplePair) String() string { | ||
| return fmt.Sprintf("%s @[%s]", s.Value, s.Timestamp) | ||
| } |
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