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* Update License header for all source files - Add Apache 2.0 header to source files that did not have one. - Update all existing headers dated to 2019 to be 2020 - Remove comma from License header to comply with the Apache 2.0 guidelines. * Update Copyright notice Use the standard Copyright notices outlined by the [CNCF](https://github.com/cncf/foundation/blob/master/copyright-notices.md#copyright-notices)
89 lines
2.0 KiB
Go
89 lines
2.0 KiB
Go
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package dogstatsd_test
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import (
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"context"
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"fmt"
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"io"
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"log"
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"sync"
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"time"
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"go.opentelemetry.io/otel/api/key"
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"go.opentelemetry.io/otel/api/metric"
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"go.opentelemetry.io/otel/exporters/metric/dogstatsd"
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)
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func ExampleNew() {
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// Create a "server"
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wg := &sync.WaitGroup{}
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wg.Add(1)
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reader, writer := io.Pipe()
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go func() {
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defer wg.Done()
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for {
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var buf [4096]byte
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n, err := reader.Read(buf[:])
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if err == io.EOF {
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return
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} else if err != nil {
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log.Fatal("Read err: ", err)
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} else if n >= len(buf) {
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log.Fatal("Read small buffer: ", n)
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} else {
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fmt.Print(string(buf[0:n]))
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}
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}
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}()
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// Create a meter
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pusher, err := dogstatsd.NewExportPipeline(dogstatsd.Config{
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// The Writer field provides test support.
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Writer: writer,
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// In real code, use the URL field:
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//
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// URL: fmt.Sprint("unix://", path),
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}, time.Minute)
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if err != nil {
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log.Fatal("Could not initialize dogstatsd exporter:", err)
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}
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ctx := context.Background()
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key := key.New("key")
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// pusher implements the metric.MeterProvider interface:
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meter := pusher.Meter("example")
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// Create and update a single counter:
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counter := metric.Must(meter).NewInt64Counter("a.counter", metric.WithKeys(key))
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labels := meter.Labels(key.String("value"))
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counter.Add(ctx, 100, labels)
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// Flush the exporter, close the pipe, and wait for the reader.
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pusher.Stop()
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writer.Close()
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wg.Wait()
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// Output:
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// a.counter:100|c|#key:value
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}
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