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78 lines
2.2 KiB
Go
78 lines
2.2 KiB
Go
// Copyright (C) 2015 Space Monkey, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package monkit
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import (
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"strings"
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)
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// SeriesKey represents an individual time series for monkit to output.
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type SeriesKey struct {
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Measurement string
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Tags *TagSet
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}
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// NewSeriesKey constructs a new series with the minimal fields.
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func NewSeriesKey(measurement string) SeriesKey {
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return SeriesKey{Measurement: measurement}
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}
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// WithTag returns a copy of the SeriesKey with the tag set
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func (s SeriesKey) WithTag(key, value string) SeriesKey {
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s.Tags = s.Tags.Set(key, value)
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return s
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}
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// String returns a string representation of the series. For example, it returns
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// something like `measurement,tag0=val0,tag1=val1`.
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func (s SeriesKey) String() string {
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var builder strings.Builder
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writeMeasurement(&builder, s.Measurement)
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if s.Tags.Len() > 0 {
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builder.WriteByte(',')
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builder.WriteString(s.Tags.String())
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}
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return builder.String()
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}
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func (s SeriesKey) WithField(field string) string {
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var builder strings.Builder
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builder.WriteString(s.String())
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builder.WriteByte(' ')
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writeTag(&builder, field)
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return builder.String()
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}
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// StatSource represents anything that can return named floating point values.
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type StatSource interface {
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Stats(cb func(key SeriesKey, field string, val float64))
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}
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type StatSourceFunc func(cb func(key SeriesKey, field string, val float64))
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func (f StatSourceFunc) Stats(cb func(key SeriesKey, field string, val float64)) {
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f(cb)
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}
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// Collect takes something that implements the StatSource interface and returns
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// a key/value map.
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func Collect(mon StatSource) map[string]float64 {
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rv := make(map[string]float64)
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mon.Stats(func(key SeriesKey, field string, val float64) {
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rv[key.WithField(field)] = val
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})
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return rv
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}
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