Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
b1c090c
commit f4a8e2a
Showing
5 changed files
with
124 additions
and
41 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| // The MIT License | ||
| // | ||
| // Copyright (c) 2020 Temporal Technologies Inc. All rights reserved. | ||
| // | ||
| // Copyright (c) 2020 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 metrics | ||
|
|
||
| import ( | ||
| "go.opentelemetry.io/otel/metric" | ||
| ) | ||
|
|
||
| type ( | ||
| // optionSet represents a slice of metric options. We need it to be able to add options of the | ||
| // [metric.InstrumentOption] type to slices which may be of any other type implemented by metric.InstrumentOption. | ||
| // Normally, you could do something like `T metric.InstrumentOption` here, but the type dependency here is reversed. | ||
| // We need a generic type T that is implemented *by* metric.InstrumentOption, not the other way around. | ||
| // This is the only solution which avoids duplicating all the logic of the addOptionsFromCatalog function without | ||
| // relying on reflection, an error-prone type assertion, or a type switch with a runtime error for unhandled cases. | ||
| optionSet[T any] interface { | ||
| addOption(option metric.InstrumentOption) T | ||
| } | ||
| int64HistogramOptions []metric.Int64HistogramOption | ||
| int64CounterOptions []metric.Int64CounterOption | ||
| float64ObservableGaugeOptions []metric.Float64ObservableGaugeOption | ||
| ) | ||
|
|
||
| func addOptionsFromCatalog[T optionSet[T]](omp *otelMetricsHandler, opts T, metricName string) T { | ||
| entry, ok := omp.catalog[metricName] | ||
| if !ok { | ||
| return opts | ||
| } | ||
|
|
||
| if description := entry.description; description != "" { | ||
| opts = opts.addOption(metric.WithDescription(description)) | ||
| } | ||
|
|
||
| return opts | ||
| } | ||
|
|
||
| func (opts float64ObservableGaugeOptions) addOption(option metric.InstrumentOption) float64ObservableGaugeOptions { | ||
| return append(opts, option) | ||
| } | ||
|
|
||
| func (opts int64CounterOptions) addOption(option metric.InstrumentOption) int64CounterOptions { | ||
| return append(opts, option) | ||
| } | ||
|
|
||
| func (opts int64HistogramOptions) addOption(option metric.InstrumentOption) int64HistogramOptions { | ||
| return append(opts, option) | ||
| } |