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client.go
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client.go
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// Copyright The 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"
"os"
"github.com/bradfitz/gomemcache/memcache"
"go.opentelemetry.io/contrib/instrumentation/github.com/bradfitz/gomemcache/memcache/otelmemcache"
oteltracestdout "go.opentelemetry.io/otel/exporters/stdout"
sdktrace "go.opentelemetry.io/otel/sdk/trace"
)
func main() {
var host, port = os.Getenv("HOST"), "11211"
tp := initTracer()
ctx := context.Background()
defer tp.ForceFlush(ctx)
c := otelmemcache.NewClientWithTracing(
memcache.New(
host+":"+port,
),
otelmemcache.WithTracerProvider(tp),
)
ctx, s := tp.Tracer("example-tracer").Start(ctx, "test-operations")
doMemcacheOperations(ctx, c)
s.End()
}
func doMemcacheOperations(ctx context.Context, c *otelmemcache.Client) {
cc := c.WithContext(ctx)
err := cc.Add(&memcache.Item{
Key: "foo",
Value: []byte("bar"),
})
if err != nil {
log.Printf("Add failed: %s", err)
}
_, err = cc.Get("foo")
if err != nil {
log.Printf("Get failed: %s", err)
}
err = cc.Delete("baz")
if err != nil {
log.Printf("Delete failed: %s", err)
}
err = cc.DeleteAll()
if err != nil {
log.Printf("DeleteAll failed: %s", err)
}
}
func initTracer() *sdktrace.TracerProvider {
exporter, err := oteltracestdout.NewExporter(oteltracestdout.WithPrettyPrint())
if err != nil {
log.Fatal(err)
}
tp := sdktrace.NewTracerProvider(
sdktrace.WithSampler(sdktrace.AlwaysSample()),
sdktrace.WithBatcher(exporter),
)
return tp
}