go/opentelemetry-go
go/opentelemetry-go
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Code Issues Releases Activity

Update single asynchronous example to use inst opt (#3574)

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Co-authored-by: Chester Cheung <cheung.zhy.csu@gmail.com>
This commit is contained in:
Tyler Yahn 2023-01-10 21:21:58 -08:00 committed by GitHub
parent 96d5de1181
commit 89cb6a4462
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1 changed files with 21 additions and 18 deletions
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39
metric/example_test.go
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@ -20,6 +20,7 @@ import (
"runtime"
"time"
"go.opentelemetry.io/otel/attribute"
"go.opentelemetry.io/otel/metric"
"go.opentelemetry.io/otel/metric/instrument"
"go.opentelemetry.io/otel/metric/unit"
@ -51,27 +52,29 @@ func ExampleMeter_asynchronous_single() {
meterProvider := metric.NewNoopMeterProvider()
meter := meterProvider.Meter("go.opentelemetry.io/otel/metric#AsyncExample")
memoryUsage, err := meter.Int64ObservableGauge(
"MemoryUsage",
_, err := meter.Int64ObservableGauge(
"DiskUsage",
instrument.WithUnit(unit.Bytes),
instrument.WithInt64Callback(func(ctx context.Context, inst instrument.Int64Observer) error {
// Do the real work here to get the real disk usage. For example,
//
// usage, err := GetDiskUsage(diskID)
// if err != nil {
// if retryable(err) {
// // Retry the usage measurement.
// } else {
// return err
// }
// }
//
// For demonstration purpose, a static value is used here.
usage := 75000
inst.Observe(ctx, int64(usage), attribute.Int("disk.id", 3))
return nil
}),
)
if err != nil {
fmt.Println("Failed to register instrument")
panic(err)
}
_, err = meter.RegisterCallback([]instrument.Asynchronous{memoryUsage},
func(ctx context.Context) error {
// instrument.WithCallbackFunc(func(ctx context.Context) {
//Do Work to get the real memoryUsage
// mem := GatherMemory(ctx)
mem := 75000
memoryUsage.Observe(ctx, int64(mem))
return nil
})
if err != nil {
fmt.Println("Failed to register callback")
fmt.Println("failed to register instrument")
panic(err)
}
}