1 // Copyright 2018, OpenCensus Authors 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 // See the License for the specific language governing permissions and 13 // limitations under the License. 14 15 package metricdata 16 17 import ( 18 "time" 19 20 "go.opencensus.io/resource" 21 ) 22 23 // Descriptor holds metadata about a metric. 24 type Descriptor struct { 25 Name string // full name of the metric 26 Description string // human-readable description 27 Unit Unit // units for the measure 28 Type Type // type of measure 29 LabelKeys []LabelKey // label keys 30 } 31 32 // Metric represents a quantity measured against a resource with different 33 // label value combinations. 34 type Metric struct { 35 Descriptor Descriptor // metric descriptor 36 Resource *resource.Resource // resource against which this was measured 37 TimeSeries []*TimeSeries // one time series for each combination of label values 38 } 39 40 // TimeSeries is a sequence of points associated with a combination of label 41 // values. 42 type TimeSeries struct { 43 LabelValues []LabelValue // label values, same order as keys in the metric descriptor 44 Points []Point // points sequence 45 StartTime time.Time // time we started recording this time series 46 } 47