mirror of
https://github.com/open-telemetry/opentelemetry-go.git
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0f32efcdaa
* trace sdk initial commit. * fix imports and comments. * remove tracestate * split trace.go * add attribute over limit test. * add comments and restructure span.go and tracer.go * refactor MessageEvent * defer unlock * some more cleanup in span.go * rename *MessageEvent* to *Event* * cleanup comments in trace_test.go * fix typos. * return full string ID for traceID and spanID.
42 lines
1.1 KiB
Go
42 lines
1.1 KiB
Go
// Copyright 2019, 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 trace_test
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import (
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"context"
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"fmt"
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"go.opentelemetry.io/api/trace"
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)
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// This example shows how to use trace.Start and (*Span).End to capture
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// a function execution in a Span. It assumes that the function
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// has a context.Context argument.
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func ExampleStart() {
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printEvens := func(ctx context.Context) {
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_, span := trace.GlobalTracer().Start(ctx, "my/package.Function")
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defer span.Finish()
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for i := 0; i < 10; i++ {
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if i%2 == 0 {
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fmt.Printf("Even!\n")
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}
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}
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}
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ctx := context.Background()
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printEvens(ctx)
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}
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