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Code Issues Releases Activity

Redesign RegisterCallback API (#3584)

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* Update RegisterCallback and Callback declerations

RegisterCallback accepts variadic Asynchronous instruments instead of a
slice.

Callback accepts an observation result recorder to ensure instruments
that are observed by a callback.

* Update global, noop, SDK implementations
* Fix examples
* Add changes to changelog
* Test RegisterCallback for invalid observers
* Test callbacks from foreign sources not collected
* Support registering delegating instruments
This commit is contained in:
Tyler Yahn
2023-01-19 06:18:26 -08:00
committed by GitHub
parent e8c6e45178
commit 69b18e62a7
12 changed files with 630 additions and 114 deletions
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5
example/prometheus/main.go
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@ -28,6 +28,7 @@ import (
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/exporters/prometheus"
api "go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/instrument"
"go.opentelemetry.io/otel/sdk/metric"
)
@ -68,9 +69,9 @@ func main() {
if err != nil {
log.Fatal(err)
}
_, err = meter.RegisterCallback(func(ctx context.Context) error {
_, err = meter.RegisterCallback(func(_ context.Context, o api.Observer) error {
n := -10. + rand.Float64()*(90.) // [-10, 100)
gauge.Observe(ctx, n, attrs...)
o.ObserveFloat64(gauge, n, attrs...)
return nil
}, gauge)
if err != nil {