1 // Copyright 2019, 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 metricproducer 16 17 import ( 18 "go.opencensus.io/metric/metricdata" 19 ) 20 21 // Producer is a source of metrics. 22 type Producer interface { 23 // Read should return the current values of all metrics supported by this 24 // metric provider. 25 // The returned metrics should be unique for each combination of name and 26 // resource. 27 Read() []*metricdata.Metric 28 } 29