mirror of
https://github.com/open-telemetry/opentelemetry-go.git
synced 2024-12-12 10:04:29 +02:00
6b4acf47b8
* Rename distributedcontext package to correlation Correlation is the name we agreed upon. * Move trace propagators to api/trace The trace propagators tests had to be moved to a testtrace subpackage to avoid import cycles between api/trace and internal/trace. Needed to shut up golint about stutter in trace.TraceContext - TraceContext is a name of a W3C spec, so this stutter is expected. It's certainly still better than golint's suggestion of having trace.Context. * Rename api/propagators to api/propagation This package will not contain any propagators in the long run, just the interface definitions. Co-authored-by: Joshua MacDonald <jmacd@users.noreply.github.com>
79 lines
2.1 KiB
Go
79 lines
2.1 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/trace"
|
|
"go.opentelemetry.io/otel/example/namedtracer/foo"
|
|
"go.opentelemetry.io/otel/exporter/trace/stdout"
|
|
sdktrace "go.opentelemetry.io/otel/sdk/trace"
|
|
)
|
|
|
|
var (
|
|
fooKey = key.New("ex.com/foo")
|
|
barKey = key.New("ex.com/bar")
|
|
anotherKey = key.New("ex.com/another")
|
|
)
|
|
|
|
var tp *sdktrace.Provider
|
|
|
|
// initTracer creates and registers trace provider instance.
|
|
func initTracer() {
|
|
var err error
|
|
exp, err := stdout.NewExporter(stdout.Options{})
|
|
if err != nil {
|
|
log.Panicf("failed to initialize stdout exporter %v\n", 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\n", err)
|
|
}
|
|
global.SetTraceProvider(tp)
|
|
}
|
|
|
|
func main() {
|
|
// initialize trace provider.
|
|
initTracer()
|
|
|
|
// Create a named tracer with package path as its name.
|
|
tracer := tp.Tracer("example/namedtracer/main")
|
|
ctx := context.Background()
|
|
|
|
ctx = correlation.NewContext(ctx,
|
|
fooKey.String("foo1"),
|
|
barKey.String("bar1"),
|
|
)
|
|
|
|
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"))
|
|
|
|
return foo.SubOperation(ctx)
|
|
})
|
|
if err != nil {
|
|
panic(err)
|
|
}
|
|
}
|