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datapoint.go
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datapoint.go
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// Copyright (c) 2019 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package ts
import (
"math"
"time"
"github.com/m3db/m3/src/query/graphite/stats"
)
// A Datapoint is a single data value reported at a given time
type Datapoint struct {
Timestamp time.Time
Value float64
}
// ValueIsNaN returns true iff underlying value is NaN
func (d Datapoint) ValueIsNaN() bool { return math.IsNaN(d.Value) }
// DatapointsByTimestamp is a sortable interface for datapoints
type DatapointsByTimestamp []Datapoint
// Len is the length of the datapoints
func (p DatapointsByTimestamp) Len() int { return len(p) }
// Less compares two datapoints by timestamp
func (p DatapointsByTimestamp) Less(i, j int) bool { return p[i].Timestamp.Before(p[j].Timestamp) }
// Swap swaps two datapoints
func (p DatapointsByTimestamp) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
// ConsolidatedValue represents a time window of consolidated data
type ConsolidatedValue struct {
// StartTime is the start time of the time window covered by this
// consolidation
StartTime time.Time
// EndTime is the end time of the time window covered by this
// consolidation
EndTime time.Time
// Values is the statistics for that consolidated time window
Values stats.Statistics
}
// ConsolidatedValuesByStartTime is a sortable interface for consolidated values
type ConsolidatedValuesByStartTime []ConsolidatedValue
// Len is the length of the values
func (p ConsolidatedValuesByStartTime) Len() int { return len(p) }
// Less compares two values by start time
func (p ConsolidatedValuesByStartTime) Less(i, j int) bool {
return p[i].StartTime.Before(p[j].StartTime)
}
// Swap swaps two values
func (p ConsolidatedValuesByStartTime) Swap(i, j int) { p[i], p[j] = p[j], p[i] }
// Datapoints is a list of datapoints that implement the stats.Values interface.
type Datapoints []Datapoint
// Len is the length of the array.
func (d Datapoints) Len() int { return len(d) }
// ValueAt returns the value at the nth element.
func (d Datapoints) ValueAt(n int) float64 { return d[n].Value }
// AllNaN returns true if all the values are NaN
func (d Datapoints) AllNaN() bool {
for _, dp := range d {
if !dp.ValueIsNaN() {
return false
}
}
return true
}