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opentelemetry-go/example/basic/main.go
Tyler Yahn 52fb033e13
Rename the exporter directory to exporters (#502)
The `go.opentelemetry.io/otel/exporter/trace/jaeger` package was
mistakenly released with a `v1.0.0` tag instead of `v0.1.0`. This
resulted in all subsequent releases not becoming the default latest,
meaning that `go get`s pulled in the incompatible `v0.1.0` release of
that package when pulling in more recent packages from other otel
packages. Renaming the `exporter` directory to `exporters` fixes this
issue by consequentially renaming the package.

Additionally, this action also renames *all* exporters. This is
understood to be a disruptive action to existing users as they will need
to update any dependencies they currently have on our exporters.
However, it was decided to take this action regardless. The need to
resolve the existing issue explained above is highly important, and
given the Alpha state of this project these kinds of breaking changes
should be expected (though not without reason).

Resolves #331

Co-authored-by: Rahul Patel <rghetia@yahoo.com>
2020-03-02 13:54:57 -08:00

133 lines
3.6 KiB
Go

// Copyright 2019, OpenTelemetry Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
"context"
"log"
"go.opentelemetry.io/otel/api/correlation"
"go.opentelemetry.io/otel/api/global"
"go.opentelemetry.io/otel/api/key"
"go.opentelemetry.io/otel/api/metric"
"go.opentelemetry.io/otel/api/trace"
metricstdout "go.opentelemetry.io/otel/exporters/metric/stdout"
tracestdout "go.opentelemetry.io/otel/exporters/trace/stdout"
"go.opentelemetry.io/otel/sdk/metric/controller/push"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
var (
fooKey = key.New("ex.com/foo")
barKey = key.New("ex.com/bar")
lemonsKey = key.New("ex.com/lemons")
anotherKey = key.New("ex.com/another")
)
// initTracer creates and registers trace provider instance.
func initTracer() {
var err error
exp, err := tracestdout.NewExporter(tracestdout.Options{PrettyPrint: false})
if err != nil {
log.Panicf("failed to initialize trace stdout exporter %v", err)
return
}
tp, err := sdktrace.NewProvider(sdktrace.WithSyncer(exp),
sdktrace.WithConfig(sdktrace.Config{DefaultSampler: sdktrace.AlwaysSample()}))
if err != nil {
log.Panicf("failed to initialize trace provider %v", err)
}
global.SetTraceProvider(tp)
}
func initMeter() *push.Controller {
pusher, err := metricstdout.InstallNewPipeline(metricstdout.Config{
Quantiles: []float64{0.5, 0.9, 0.99},
PrettyPrint: false,
})
if err != nil {
log.Panicf("failed to initialize metric stdout exporter %v", err)
}
return pusher
}
func main() {
defer initMeter().Stop()
initTracer()
// Note: Have to get the meter and tracer after the global is
// initialized. See OTEP 0005.
tracer := global.TraceProvider().Tracer("ex.com/basic")
meter := global.MeterProvider().Meter("ex.com/basic")
oneMetric := meter.NewFloat64Gauge("ex.com.one",
metric.WithKeys(fooKey, barKey, lemonsKey),
metric.WithDescription("A gauge set to 1.0"),
)
measureTwo := meter.NewFloat64Measure("ex.com.two")
ctx := context.Background()
ctx = correlation.NewContext(ctx,
fooKey.String("foo1"),
barKey.String("bar1"),
)
commonLabels := meter.Labels(lemonsKey.Int(10), key.String("A", "1"), key.String("B", "2"), key.String("C", "3"))
gauge := oneMetric.Bind(commonLabels)
defer gauge.Unbind()
measure := measureTwo.Bind(commonLabels)
defer measure.Unbind()
err := tracer.WithSpan(ctx, "operation", func(ctx context.Context) error {
trace.SpanFromContext(ctx).AddEvent(ctx, "Nice operation!", key.New("bogons").Int(100))
trace.SpanFromContext(ctx).SetAttributes(anotherKey.String("yes"))
gauge.Set(ctx, 1)
meter.RecordBatch(
// Note: call-site variables added as context Entries:
correlation.NewContext(ctx, anotherKey.String("xyz")),
commonLabels,
oneMetric.Measurement(1.0),
measureTwo.Measurement(2.0),
)
return tracer.WithSpan(
ctx,
"Sub operation...",
func(ctx context.Context) error {
trace.SpanFromContext(ctx).SetAttributes(lemonsKey.String("five"))
trace.SpanFromContext(ctx).AddEvent(ctx, "Sub span event")
measure.Record(ctx, 1.3)
return nil
},
)
})
if err != nil {
panic(err)
}
}